diff --git a/Makefile b/Makefile
index 340fd63..917c951 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@
 	install -m 755 ./glide ${DESTDIR}/usr/local/bin/glide
 
 test:
-	${GLIDE_GO_EXECUTABLE} test . ./gb ./path ./action ./tree ./util ./godep ./godep/strip ./gpm ./cfg ./dependency ./importer ./msg ./repo
+	${GLIDE_GO_EXECUTABLE} test . ./gb ./path ./action ./tree ./util ./godep ./godep/strip ./gpm ./cfg ./dependency ./importer ./msg ./repo ./overrides
 
 clean:
 	rm -f ./glide.test
diff --git a/action/cache.go b/action/cache.go
index 9896f21..b2ee07a 100644
--- a/action/cache.go
+++ b/action/cache.go
@@ -9,21 +9,15 @@
 
 // CacheClear clears the Glide cache
 func CacheClear() {
-	l, err := cache.Location()
-	if err != nil {
-		msg.Die("Unable to clear the cache: %s", err)
-	}
+	l := cache.Location()
 
-	err = os.RemoveAll(l)
+	err := os.RemoveAll(l)
 	if err != nil {
 		msg.Die("Unable to clear the cache: %s", err)
 	}
 
 	cache.SetupReset()
-	err = cache.Setup()
-	if err != nil {
-		msg.Die("Unable to clear the cache: %s", err)
-	}
+	cache.Setup()
 
 	msg.Info("Glide cache has been cleared.")
 }
diff --git a/action/config_wizard.go b/action/config_wizard.go
index 1257980..ae2b317 100644
--- a/action/config_wizard.go
+++ b/action/config_wizard.go
@@ -18,6 +18,7 @@
 // ConfigWizard reads configuration from a glide.yaml file and attempts to suggest
 // improvements. The wizard is interactive.
 func ConfigWizard(base string) {
+	cache.SystemLock()
 	_, err := gpath.Glide()
 	glidefile := gpath.GlideFile
 	if err != nil {
@@ -37,10 +38,7 @@
 
 	conf := EnsureConfig()
 
-	err = cache.Setup()
-	if err != nil {
-		msg.Die("Problem setting up cache: %s", err)
-	}
+	cache.Setup()
 
 	msg.Info("Looking for dependencies to make suggestions on")
 	msg.Info("--> Scanning for dependencies not using version ranges")
@@ -67,12 +65,7 @@
 
 	var changes int
 	for _, dep := range deps {
-		var remote string
-		if dep.Repository != "" {
-			remote = dep.Repository
-		} else {
-			remote = "https://" + dep.Name
-		}
+		remote := dep.Remote()
 
 		// First check, ask if the tag should be used instead of the commit id for it.
 		cur := cache.MemCurrent(remote)
@@ -257,17 +250,8 @@
 var createGitParseVersion = regexp.MustCompile(`(?m-s)(?:tags)/(\S+)$`)
 
 func wizardFindVersions(d *cfg.Dependency) {
-	l, err := cache.Location()
-	if err != nil {
-		msg.Debug("Problem detecting cache location: %s", err)
-		return
-	}
-	var remote string
-	if d.Repository != "" {
-		remote = d.Repository
-	} else {
-		remote = "https://" + d.Name
-	}
+	l := cache.Location()
+	remote := d.Remote()
 
 	key, err := cache.Key(remote)
 	if err != nil {
diff --git a/action/ensure.go b/action/ensure.go
index 2f5f5af..a2254a6 100644
--- a/action/ensure.go
+++ b/action/ensure.go
@@ -10,6 +10,7 @@
 
 	"github.com/Masterminds/glide/cfg"
 	"github.com/Masterminds/glide/msg"
+	"github.com/Masterminds/glide/overrides"
 	gpath "github.com/Masterminds/glide/path"
 	"github.com/Masterminds/glide/util"
 )
@@ -56,6 +57,11 @@
 		}
 	}
 
+	err = overrides.Load()
+	if err != nil {
+		msg.Err("Unable to load overrides: %s", err)
+	}
+
 	return conf
 }
 
diff --git a/action/get.go b/action/get.go
index 009d90d..696c50c 100644
--- a/action/get.go
+++ b/action/get.go
@@ -18,10 +18,8 @@
 // Get fetches one or more dependencies and installs.
 //
 // This includes resolving dependency resolution and re-generating the lock file.
-func Get(names []string, installer *repo.Installer, insecure, skipRecursive, strip, stripVendor, nonInteract, testDeps bool) {
-	if installer.UseCache {
-		cache.SystemLock()
-	}
+func Get(names []string, installer *repo.Installer, insecure, skipRecursive, stripVendor, nonInteract, testDeps bool) {
+	cache.SystemLock()
 
 	base := gpath.Basepath()
 	EnsureGopath()
@@ -72,11 +70,9 @@
 		msg.Err("Failed to set references: %s", err)
 	}
 
-	// VendoredCleanup
-	// When stripping VCS happens this will happen as well. No need for double
-	// effort.
-	if installer.UpdateVendored && !strip {
-		repo.VendoredCleanup(confcopy)
+	err = installer.Export(confcopy)
+	if err != nil {
+		msg.Die("Unable to export dependencies to vendor directory: %s", err)
 	}
 
 	// Write YAML
@@ -93,14 +89,6 @@
 		msg.Warn("Skipping lockfile generation because full dependency tree is not being calculated")
 	}
 
-	if strip {
-		msg.Info("Removing version control data from vendor directory...")
-		err := gpath.StripVcs()
-		if err != nil {
-			msg.Err("Unable to strip version control data: %s", err)
-		}
-	}
-
 	if stripVendor {
 		msg.Info("Removing nested vendor and Godeps/_workspace directories...")
 		err := gpath.StripVendor()
@@ -237,12 +225,7 @@
 }
 
 func getWizard(dep *cfg.Dependency) {
-	var remote string
-	if dep.Repository != "" {
-		remote = dep.Repository
-	} else {
-		remote = "https://" + dep.Name
-	}
+	remote := dep.Remote()
 
 	// Lookup dependency info and store in cache.
 	msg.Info("--> Gathering release information for %s", dep.Name)
diff --git a/action/install.go b/action/install.go
index b1566a2..c8e7253 100644
--- a/action/install.go
+++ b/action/install.go
@@ -1,21 +1,19 @@
 package action
 
 import (
+	"fmt"
 	"path/filepath"
 
 	"github.com/Masterminds/glide/cache"
 	"github.com/Masterminds/glide/cfg"
-	"github.com/Masterminds/glide/dependency"
 	"github.com/Masterminds/glide/msg"
 	gpath "github.com/Masterminds/glide/path"
 	"github.com/Masterminds/glide/repo"
 )
 
 // Install installs a vendor directory based on an existing Glide configuration.
-func Install(installer *repo.Installer, strip, stripVendor bool) {
-	if installer.UseCache {
-		cache.SystemLock()
-	}
+func Install(installer *repo.Installer, stripVendor bool) {
+	cache.SystemLock()
 
 	base := "."
 	// Ensure GOPATH
@@ -26,7 +24,7 @@
 	// Lockfile exists
 	if !gpath.HasLock(base) {
 		msg.Info("Lock file (glide.lock) does not exist. Performing update.")
-		Update(installer, false, strip, stripVendor)
+		Update(installer, false, stripVendor)
 		return
 	}
 	// Load lockfile
@@ -39,6 +37,9 @@
 	if err != nil {
 		msg.Die("Could not load lockfile.")
 	} else if hash != lock.Hash {
+		fmt.Println(hash, lock.Hash)
+		foo, _ := conf.Marshal()
+		fmt.Println(string(foo))
 		msg.Warn("Lock file may be out of date. Hash check of YAML failed. You may need to run 'update'")
 	}
 
@@ -52,29 +53,12 @@
 
 	// Set reference
 	if err := repo.SetReference(newConf, installer.ResolveTest); err != nil {
-		msg.Err("Failed to set references: %s (Skip to cleanup)", err)
+		msg.Die("Failed to set references: %s (Skip to cleanup)", err)
 	}
 
-	// Delete unused packages
-	if installer.DeleteUnused {
-		// newConf is calculated based on the lock file so it should be
-		// accurate to the project list.
-		dependency.DeleteUnused(newConf)
-	}
-
-	// VendoredCleanup. This should ONLY be run if UpdateVendored was specified.
-	// When stripping VCS happens this will happen as well. No need for double
-	// effort.
-	if installer.UpdateVendored && !strip {
-		repo.VendoredCleanup(newConf)
-	}
-
-	if strip {
-		msg.Info("Removing version control data from vendor directory...")
-		err := gpath.StripVcs()
-		if err != nil {
-			msg.Err("Unable to strip version control data: %s", err)
-		}
+	err = installer.Export(newConf)
+	if err != nil {
+		msg.Die("Unable to export dependencies to vendor directory: %s", err)
 	}
 
 	if stripVendor {
diff --git a/action/list.go b/action/list.go
index f4b3379..29d815f 100644
--- a/action/list.go
+++ b/action/list.go
@@ -25,7 +25,7 @@
 	if err != nil {
 		msg.Die("Could not create a resolver: %s", err)
 	}
-	h := &dependency.DefaultMissingPackageHandler{Missing: []string{}, Gopath: []string{}}
+	h := &dependency.DefaultMissingPackageHandler{Missing: []string{}, Gopath: []string{}, Prefix: "vendor"}
 	r.Handler = h
 
 	localPkgs, _, err := r.ResolveLocal(deep)
diff --git a/action/overrides.go b/action/overrides.go
new file mode 100644
index 0000000..de87f61
--- /dev/null
+++ b/action/overrides.go
@@ -0,0 +1,146 @@
+package action
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/Masterminds/glide/msg"
+	"github.com/Masterminds/glide/overrides"
+	gpath "github.com/Masterminds/glide/path"
+)
+
+// OverridesList displays a list of currently setup overrides.
+func OverridesList() error {
+	home := gpath.Home()
+
+	op := filepath.Join(home, "overrides.yaml")
+
+	if _, err := os.Stat(op); os.IsNotExist(err) {
+		msg.Info("No overrides exist. No overrides.yaml file not found")
+		return nil
+	}
+
+	ov, err := overrides.ReadOverridesFile(op)
+	if err != nil {
+		msg.Die("Unable to read overrides.yaml file: %s", err)
+	}
+
+	if len(ov.Repos) == 0 {
+		msg.Info("No overrides found")
+		return nil
+	}
+
+	msg.Info("Overrides...")
+	for _, r := range ov.Repos {
+		if r.Vcs == "" {
+			msg.Info("--> %s replaced by %s", r.Original, r.Repo)
+		} else {
+			msg.Info("--> %s replaced by %s (%s)", r.Original, r.Repo, r.Vcs)
+		}
+	}
+
+	return nil
+}
+
+// OverridesSet sets an override to use
+func OverridesSet(o, r, v string) error {
+	if o == "" || r == "" {
+		msg.Err("Both the original and overriding values are required")
+		return nil
+	}
+
+	home := gpath.Home()
+
+	op := filepath.Join(home, "overrides.yaml")
+
+	var ov *overrides.Overrides
+	if _, err := os.Stat(op); os.IsNotExist(err) {
+		msg.Info("No overrides.yaml file exists. Creating new one")
+		ov = &overrides.Overrides{
+			Repos: make(overrides.OverrideRepos, 0),
+		}
+	} else {
+		ov, err = overrides.ReadOverridesFile(op)
+		if err != nil {
+			msg.Die("Error reading existing overrides.yaml file: %s", err)
+		}
+	}
+
+	found := false
+	for i, re := range ov.Repos {
+		if re.Original == o {
+			found = true
+			msg.Info("%s found in overrides. Replacing with new settings", o)
+			ov.Repos[i].Repo = r
+			ov.Repos[i].Vcs = v
+		}
+	}
+
+	if !found {
+		nr := &overrides.OverrideRepo{
+			Original: o,
+			Repo:     r,
+			Vcs:      v,
+		}
+		ov.Repos = append(ov.Repos, nr)
+	}
+
+	msg.Info("%s being set to %s", o, r)
+
+	err := ov.WriteFile(op)
+	if err != nil {
+		msg.Err("Error writing overrides.yaml file: %s", err)
+	} else {
+		msg.Info("overrides.yaml written with changes")
+	}
+
+	return nil
+}
+
+// OverridesRemove removes an override setting
+func OverridesRemove(k string) error {
+	if k == "" {
+		msg.Err("The override to remove is required")
+		return nil
+	}
+
+	home := gpath.Home()
+
+	op := filepath.Join(home, "overrides.yaml")
+
+	if _, err := os.Stat(op); os.IsNotExist(err) {
+		msg.Err("overrides.yaml file not found")
+		return nil
+	}
+
+	ov, err := overrides.ReadOverridesFile(op)
+	if err != nil {
+		msg.Die("Unable to read overrides.yaml file: %s", err)
+	}
+
+	var nre overrides.OverrideRepos
+	var found bool
+	for _, re := range ov.Repos {
+		if re.Original != k {
+			nre = append(nre, re)
+		} else {
+			found = true
+		}
+	}
+
+	if !found {
+		msg.Warn("%s was not found in overrides", k)
+	} else {
+		msg.Info("%s was removed from overrides", k)
+		ov.Repos = nre
+
+		err = ov.WriteFile(op)
+		if err != nil {
+			msg.Err("Error writing overrides.yaml file: %s", err)
+		} else {
+			msg.Info("overrides.yaml written with changes")
+		}
+	}
+
+	return nil
+}
diff --git a/action/remove.go b/action/remove.go
index fc305f5..63a6a58 100644
--- a/action/remove.go
+++ b/action/remove.go
@@ -1,6 +1,7 @@
 package action
 
 import (
+	"github.com/Masterminds/glide/cache"
 	"github.com/Masterminds/glide/cfg"
 	"github.com/Masterminds/glide/msg"
 	gpath "github.com/Masterminds/glide/path"
@@ -9,6 +10,7 @@
 
 // Remove removes a dependncy from the configuration.
 func Remove(packages []string, inst *repo.Installer) {
+	cache.SystemLock()
 	base := gpath.Basepath()
 	EnsureGopath()
 	EnsureVendorDir()
@@ -25,16 +27,15 @@
 	// Copy used to generate locks.
 	confcopy := conf.Clone()
 
-	confcopy.Imports = inst.List(confcopy)
+	//confcopy.Imports = inst.List(confcopy)
 
 	if err := repo.SetReference(confcopy, inst.ResolveTest); err != nil {
 		msg.Err("Failed to set references: %s", err)
 	}
 
-	// TODO: Right now, there is no flag to enable this, so this will never be
-	// run. I am not sure whether we should allow this in a rm op or not.
-	if inst.UpdateVendored {
-		repo.VendoredCleanup(confcopy)
+	err = inst.Export(confcopy)
+	if err != nil {
+		msg.Die("Unable to export dependencies to vendor directory: %s", err)
 	}
 
 	// Write glide.yaml
diff --git a/action/update.go b/action/update.go
index 9712ebb..19ede20 100644
--- a/action/update.go
+++ b/action/update.go
@@ -6,18 +6,14 @@
 
 	"github.com/Masterminds/glide/cache"
 	"github.com/Masterminds/glide/cfg"
-	"github.com/Masterminds/glide/dependency"
-	"github.com/Masterminds/glide/godep"
 	"github.com/Masterminds/glide/msg"
 	gpath "github.com/Masterminds/glide/path"
 	"github.com/Masterminds/glide/repo"
 )
 
 // Update updates repos and the lock file from the main glide yaml.
-func Update(installer *repo.Installer, skipRecursive, strip, stripVendor bool) {
-	if installer.UseCache {
-		cache.SystemLock()
-	}
+func Update(installer *repo.Installer, skipRecursive, stripVendor bool) {
+	cache.SystemLock()
 
 	base := "."
 	EnsureGopath()
@@ -55,17 +51,9 @@
 		}
 	}
 
-	// Delete unused packages
-	if installer.DeleteUnused {
-		dependency.DeleteUnused(confcopy)
-	}
-
-	// Vendored cleanup
-	// VendoredCleanup. This should ONLY be run if UpdateVendored was specified.
-	// When stripping VCS happens this will happen as well. No need for double
-	// effort.
-	if installer.UpdateVendored && !strip {
-		repo.VendoredCleanup(confcopy)
+	err := installer.Export(confcopy)
+	if err != nil {
+		msg.Die("Unable to export dependencies to vendor directory: %s", err)
 	}
 
 	// Write glide.yaml (Why? Godeps/GPM/GB?)
@@ -77,10 +65,6 @@
 	// from the project. A removed dependency should warn and an added dependency
 	// should be added to the glide.yaml file. See issue #193.
 
-	if stripVendor {
-		confcopy = godep.RemoveGodepSubpackages(confcopy)
-	}
-
 	if !skipRecursive {
 		// Write lock
 		hash, err := conf.Hash()
@@ -119,14 +103,6 @@
 		msg.Warn("Skipping lockfile generation because full dependency tree is not being calculated")
 	}
 
-	if strip {
-		msg.Info("Removing version control data from vendor directory...")
-		err := gpath.StripVcs()
-		if err != nil {
-			msg.Err("Unable to strip version control data: %s", err)
-		}
-	}
-
 	if stripVendor {
 		msg.Info("Removing nested vendor and Godeps/_workspace directories...")
 		err := gpath.StripVendor()
diff --git a/cache/cache.go b/cache/cache.go
index 5a8538d..21f4edd 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -54,12 +54,12 @@
 var setupMutex sync.Mutex
 
 // Setup creates the cache location.
-func Setup() error {
+func Setup() {
 	setupMutex.Lock()
 	defer setupMutex.Unlock()
 
 	if isSetup {
-		return nil
+		return
 	}
 	msg.Debug("Setting up the cache directory")
 	pths := []string{
@@ -71,12 +71,11 @@
 	for _, l := range pths {
 		err := os.MkdirAll(filepath.Join(gpath.Home(), l), 0755)
 		if err != nil {
-			return err
+			msg.Die("Cache directory unavailable: %s", err)
 		}
 	}
 
 	isSetup = true
-	return nil
 }
 
 // SetupReset resets if setup has been completed. The next time setup is run
@@ -86,11 +85,11 @@
 }
 
 // Location returns the location of the cache.
-func Location() (string, error) {
+func Location() string {
 	p := filepath.Join(gpath.Home(), "cache")
-	err := Setup()
+	Setup()
 
-	return p, err
+	return p
 }
 
 // scpSyntaxRe matches the SCP-like addresses used to access repos over SSH.
@@ -153,10 +152,7 @@
 	if !Enabled {
 		return ErrCacheDisabled
 	}
-	location, err := Location()
-	if err != nil {
-		return err
-	}
+	location := Location()
 	data.LastUpdate = time.Now().String()
 	d, err := json.Marshal(data)
 	if err != nil {
@@ -185,10 +181,7 @@
 	if !Enabled {
 		return &RepoInfo{}, ErrCacheDisabled
 	}
-	location, err := Location()
-	if err != nil {
-		return &RepoInfo{}, err
-	}
+	location := Location()
 	c := &RepoInfo{}
 	p := filepath.Join(location, "info", key+".json")
 	f, err := ioutil.ReadFile(p)
diff --git a/cfg/config.go b/cfg/config.go
index 115c76d..49b3c65 100644
--- a/cfg/config.go
+++ b/cfg/config.go
@@ -8,6 +8,7 @@
 	"sort"
 	"strings"
 
+	"github.com/Masterminds/glide/overrides"
 	"github.com/Masterminds/glide/util"
 	"github.com/Masterminds/vcs"
 	"gopkg.in/yaml.v2"
@@ -368,15 +369,14 @@
 
 // Dependency describes a package that the present package depends upon.
 type Dependency struct {
-	Name             string   `yaml:"package"`
-	Reference        string   `yaml:"version,omitempty"`
-	Pin              string   `yaml:"-"`
-	Repository       string   `yaml:"repo,omitempty"`
-	VcsType          string   `yaml:"vcs,omitempty"`
-	Subpackages      []string `yaml:"subpackages,omitempty"`
-	Arch             []string `yaml:"arch,omitempty"`
-	Os               []string `yaml:"os,omitempty"`
-	UpdateAsVendored bool     `yaml:"-"`
+	Name        string   `yaml:"package"`
+	Reference   string   `yaml:"version,omitempty"`
+	Pin         string   `yaml:"-"`
+	Repository  string   `yaml:"repo,omitempty"`
+	VcsType     string   `yaml:"vcs,omitempty"`
+	Subpackages []string `yaml:"subpackages,omitempty"`
+	Arch        []string `yaml:"arch,omitempty"`
+	Os          []string `yaml:"os,omitempty"`
 }
 
 // A transitive representation of a dependency for importing and exploting to yaml.
@@ -460,22 +460,56 @@
 	return newDep, nil
 }
 
+// Remote returns the remote location to fetch source from. This location is
+// the central place where overrides happen from.
+func (d *Dependency) Remote() string {
+	var r string
+
+	if d.Repository != "" {
+		r = d.Repository
+	} else {
+		r = "https://" + d.Name
+	}
+
+	f, nr, _ := overrides.Get(r)
+	if f {
+		return nr
+	}
+
+	return r
+}
+
+// Vcs returns the VCS type to fetch source from.
+func (d *Dependency) Vcs() string {
+	var r string
+
+	if d.Repository != "" {
+		r = d.Repository
+	} else {
+		r = "https://" + d.Name
+	}
+
+	f, _, nv := overrides.Get(r)
+	if f {
+		return nv
+	}
+
+	return d.VcsType
+}
+
 // GetRepo retrieves a Masterminds/vcs repo object configured for the root
 // of the package being retrieved.
 func (d *Dependency) GetRepo(dest string) (vcs.Repo, error) {
 
 	// The remote location is either the configured repo or the package
 	// name as an https url.
-	var remote string
-	if len(d.Repository) > 0 {
-		remote = d.Repository
-	} else {
-		remote = "https://" + d.Name
-	}
+	remote := d.Remote()
+
+	VcsType := d.Vcs()
 
 	// If the VCS type has a value we try that first.
-	if len(d.VcsType) > 0 && d.VcsType != "None" {
-		switch vcs.Type(d.VcsType) {
+	if len(VcsType) > 0 && VcsType != "None" {
+		switch vcs.Type(VcsType) {
 		case vcs.Git:
 			return vcs.NewGitRepo(remote, dest)
 		case vcs.Svn:
@@ -485,7 +519,7 @@
 		case vcs.Bzr:
 			return vcs.NewBzrRepo(remote, dest)
 		default:
-			return nil, fmt.Errorf("Unknown VCS type %s set for %s", d.VcsType, d.Name)
+			return nil, fmt.Errorf("Unknown VCS type %s set for %s", VcsType, d.Name)
 		}
 	}
 
@@ -496,15 +530,14 @@
 // Clone creates a clone of a Dependency
 func (d *Dependency) Clone() *Dependency {
 	return &Dependency{
-		Name:             d.Name,
-		Reference:        d.Reference,
-		Pin:              d.Pin,
-		Repository:       d.Repository,
-		VcsType:          d.VcsType,
-		Subpackages:      d.Subpackages,
-		Arch:             d.Arch,
-		Os:               d.Os,
-		UpdateAsVendored: d.UpdateAsVendored,
+		Name:        d.Name,
+		Reference:   d.Reference,
+		Pin:         d.Pin,
+		Repository:  d.Repository,
+		VcsType:     d.VcsType,
+		Subpackages: d.Subpackages,
+		Arch:        d.Arch,
+		Os:          d.Os,
 	}
 }
 
diff --git a/dependency/delete.go b/dependency/delete.go
deleted file mode 100644
index 6456370..0000000
--- a/dependency/delete.go
+++ /dev/null
@@ -1,106 +0,0 @@
-package dependency
-
-import (
-	"errors"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"github.com/Masterminds/glide/cfg"
-	"github.com/Masterminds/glide/msg"
-	gpath "github.com/Masterminds/glide/path"
-)
-
-// DeleteUnused removes packages from vendor/ that are no longer used.
-//
-// TODO: This should work off of a Lock file, not glide.yaml.
-func DeleteUnused(conf *cfg.Config) error {
-	vpath, err := gpath.Vendor()
-	if err != nil {
-		return err
-	}
-	if vpath == "" {
-		return errors.New("Vendor not set")
-	}
-
-	// Build directory tree of what to keep.
-	var pkgList []string
-	for _, dep := range conf.Imports {
-		pkgList = append(pkgList, dep.Name)
-	}
-	for _, dep := range conf.DevImports {
-		pkgList = append(pkgList, dep.Name)
-	}
-
-	var searchPath string
-	var markForDelete []string
-	// Callback function for filepath.Walk to delete packages not in yaml file.
-	fn := func(path string, info os.FileInfo, err error) error {
-		// Bubble up the error
-		if err != nil {
-			return err
-		}
-
-		if info.IsDir() == false || path == searchPath || path == vpath {
-			return nil
-		}
-
-		localPath := strings.TrimPrefix(path, searchPath)
-		keep := false
-
-		// First check if the path has a prefix that's a specific package. If
-		// so we keep it to keep the package.
-		for _, name := range pkgList {
-			if strings.HasPrefix(localPath, name) {
-				keep = true
-			}
-		}
-
-		// If a package is, for example, github.com/Masterminds/glide the
-		// previous look will not mark the directories github.com or
-		// github.com/Masterminds to keep. Here we see if these names prefix
-		// and packages we know about to mark as keepers.
-		if keep == false {
-			for _, name := range pkgList {
-				if strings.HasPrefix(name, localPath) {
-					keep = true
-				}
-			}
-		}
-
-		// If the parent directory has already been marked for delete this
-		// directory doesn't need to be marked.
-		for _, markedDirectory := range markForDelete {
-			if strings.HasPrefix(path, markedDirectory) {
-				return nil
-			}
-		}
-
-		// Remove the directory if we are not keeping it.
-		if keep == false {
-			// Mark for deletion
-			markForDelete = append(markForDelete, path)
-		}
-
-		return nil
-	}
-
-	// Walk vendor directory
-	searchPath = vpath + string(os.PathSeparator)
-	err = filepath.Walk(searchPath, fn)
-	if err != nil {
-		return err
-	}
-
-	// Perform the actual delete.
-	for _, path := range markForDelete {
-		localPath := strings.TrimPrefix(path, searchPath)
-		msg.Info("Removing unused package: %s\n", localPath)
-		rerr := os.RemoveAll(path)
-		if rerr != nil {
-			return rerr
-		}
-	}
-
-	return nil
-}
diff --git a/dependency/resolver.go b/dependency/resolver.go
index 06dd2dc..b3000ee 100644
--- a/dependency/resolver.go
+++ b/dependency/resolver.go
@@ -51,6 +51,10 @@
 	//
 	// This can be used update a project found in the vendor/ folder.
 	InVendor(pkg string, addTest bool) error
+
+	// PkgPath is called to find the location locally to scan. This gives the
+	// handler to do things such as use a cached location.
+	PkgPath(pkg string) string
 }
 
 // DefaultMissingPackageHandler is the default handler for missing packages.
@@ -60,6 +64,7 @@
 type DefaultMissingPackageHandler struct {
 	Missing []string
 	Gopath  []string
+	Prefix  string
 }
 
 // NotFound prints a warning and then stores the package name in Missing.
@@ -84,6 +89,14 @@
 	return nil
 }
 
+// PkgPath returns the path to the package
+func (d *DefaultMissingPackageHandler) PkgPath(pkg string) string {
+	if d.Prefix != "" {
+		return filepath.Join(d.Prefix, pkg)
+	}
+	return pkg
+}
+
 // VersionHandler sets the version for a package when found while scanning.
 //
 // When a package if found it needs to be on the correct version before
@@ -470,7 +483,7 @@
 		// Here, we want to import the package and see what imports it has.
 		msg.Debug("Trying to open %s", vdep)
 		var imps []string
-		pkg, err := r.BuildContext.ImportDir(vdep, 0)
+		pkg, err := r.BuildContext.ImportDir(r.Handler.PkgPath(dep), 0)
 		if err != nil && strings.HasPrefix(err.Error(), "found packages ") {
 			// If we got here it's because a package and multiple packages
 			// declared. This is often because of an example with a package
@@ -478,9 +491,9 @@
 			// try to brute force the packages with a slower scan.
 			msg.Debug("Using Iterative Scanning for %s", dep)
 			if testDeps {
-				_, imps, err = IterativeScan(vdep)
+				_, imps, err = IterativeScan(r.Handler.PkgPath(dep))
 			} else {
-				imps, _, err = IterativeScan(vdep)
+				imps, _, err = IterativeScan(r.Handler.PkgPath(dep))
 			}
 
 			if err != nil {
@@ -488,7 +501,7 @@
 				continue
 			}
 		} else if err != nil {
-			msg.Debug("ImportDir error on %s: %s", vdep, err)
+			msg.Debug("ImportDir error on %s: %s", r.Handler.PkgPath(dep), err)
 			if strings.HasPrefix(err.Error(), "no buildable Go source") {
 				msg.Debug("No subpackages declared. Skipping %s.", dep)
 				continue
@@ -767,16 +780,16 @@
 	// FIXME: On error this should try to NotFound to the dependency, and then import
 	// it again.
 	var imps []string
-	p, err := r.BuildContext.ImportDir(pkg, 0)
+	p, err := r.BuildContext.ImportDir(r.Handler.PkgPath(pkg), 0)
 	if err != nil && strings.HasPrefix(err.Error(), "found packages ") {
 		// If we got here it's because a package and multiple packages
 		// declared. This is often because of an example with a package
 		// or main but +build ignore as a build tag. In that case we
 		// try to brute force the packages with a slower scan.
 		if testDeps {
-			_, imps, err = IterativeScan(pkg)
+			_, imps, err = IterativeScan(r.Handler.PkgPath(pkg))
 		} else {
-			imps, _, err = IterativeScan(pkg)
+			imps, _, err = IterativeScan(r.Handler.PkgPath(pkg))
 		}
 
 		if err != nil {
diff --git a/glide.go b/glide.go
index 1190885..2609a24 100644
--- a/glide.go
+++ b/glide.go
@@ -155,8 +155,9 @@
 					Usage: "Disable interactive prompts.",
 				},
 			},
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.Create(".", c.Bool("skip-import"), c.Bool("non-interactive"))
+				return nil
 			},
 		},
 		{
@@ -166,8 +167,9 @@
 			Description: `Glide will analyze a projects glide.yaml file and the imported
 		projects to find ways the glide.yaml file can potentially be improved. It
 		will then interactively make suggestions that you can skip or accept.`,
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.ConfigWizard(".")
+				return nil
 			},
 		},
 		{
@@ -223,28 +225,33 @@
 					Usage: "This will resolve all dependencies for all packages, not just those directly used.",
 				},
 				cli.BoolFlag{
-					Name:  "update-vendored, u",
-					Usage: "Update vendored packages (without local VCS repo). Warning, changes will be lost.",
+					Name:   "update-vendored, u",
+					Usage:  "Update vendored packages (without local VCS repo). Warning, changes will be lost.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "cache",
-					Usage: "When downloading dependencies attempt to cache them.",
+					Name:   "cache",
+					Usage:  "When downloading dependencies attempt to cache them.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "cache-gopath",
-					Usage: "When downloading dependencies attempt to put them in the GOPATH, too.",
+					Name:   "cache-gopath",
+					Usage:  "When downloading dependencies attempt to put them in the GOPATH, too.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "use-gopath",
-					Usage: "Copy dependencies from the GOPATH if they exist there.",
+					Name:   "use-gopath",
+					Usage:  "Copy dependencies from the GOPATH if they exist there.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "resolve-current",
 					Usage: "Resolve dependencies for only the current system rather than all build modes.",
 				},
 				cli.BoolFlag{
-					Name:  "strip-vcs, s",
-					Usage: "Removes version control metadata (e.g, .git directory) from the vendor folder.",
+					Name:   "strip-vcs, s",
+					Usage:  "Removes version control metadata (e.g, .git directory) from the vendor folder.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "strip-vendor, v",
@@ -259,9 +266,27 @@
 					Usage: "Resolve dependencies in test files.",
 				},
 			},
-			Action: func(c *cli.Context) {
-				if c.Bool("strip-vendor") && !c.Bool("strip-vcs") {
-					msg.Die("--strip-vendor cannot be used without --strip-vcs")
+			Action: func(c *cli.Context) error {
+				if c.Bool("delete") {
+					msg.Warn("The --delete flag is deprecated. This now works by default.")
+				}
+				if c.Bool("update-vendored") {
+					msg.Warn("The --update-vendored flag is deprecated. This now works by default.")
+				}
+				if c.String("file") != "" {
+					msg.Warn("The --flag flag is deprecated.")
+				}
+				if c.Bool("cache") {
+					msg.Warn("The --cache flag is deprecated. This now works by default.")
+				}
+				if c.Bool("cache-gopath") {
+					msg.Warn("The --cache-gopath flag is deprecated.")
+				}
+				if c.Bool("use-gopath") {
+					msg.Warn("The --use-gopath flag is deprecated. Please see overrides.")
+				}
+				if c.Bool("strip-vcs") {
+					msg.Warn("The --strip-vcs flag is deprecated. This now works by default.")
 				}
 
 				if len(c.Args()) < 1 {
@@ -276,15 +301,12 @@
 
 				inst := repo.NewInstaller()
 				inst.Force = c.Bool("force")
-				inst.UseCache = c.Bool("cache")
-				inst.UseGopath = c.Bool("use-gopath")
-				inst.UseCacheGopath = c.Bool("cache-gopath")
-				inst.UpdateVendored = c.Bool("update-vendored")
 				inst.ResolveAllFiles = c.Bool("all-dependencies")
 				inst.ResolveTest = !c.Bool("skip-test")
 				packages := []string(c.Args())
 				insecure := c.Bool("insecure")
-				action.Get(packages, inst, insecure, c.Bool("no-recursive"), c.Bool("strip-vcs"), c.Bool("strip-vendor"), c.Bool("non-interactive"), c.Bool("test"))
+				action.Get(packages, inst, insecure, c.Bool("no-recursive"), c.Bool("strip-vendor"), c.Bool("non-interactive"), c.Bool("test"))
+				return nil
 			},
 		},
 		{
@@ -303,7 +325,7 @@
 					Usage: "Also delete from vendor/ any packages that are no longer used.",
 				},
 			},
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				if len(c.Args()) < 1 {
 					fmt.Println("Oops! At least one package name is required.")
 					os.Exit(1)
@@ -317,6 +339,7 @@
 				inst.Force = c.Bool("force")
 				packages := []string(c.Args())
 				action.Remove(packages, inst)
+				return nil
 			},
 		},
 		{
@@ -332,8 +355,9 @@
 							Usage: "Save all of the discovered dependencies to a Glide YAML file.",
 						},
 					},
-					Action: func(c *cli.Context) {
+					Action: func(c *cli.Context) error {
 						action.ImportGodep(c.String("file"))
+						return nil
 					},
 				},
 				{
@@ -345,8 +369,9 @@
 							Usage: "Save all of the discovered dependencies to a Glide YAML file.",
 						},
 					},
-					Action: func(c *cli.Context) {
+					Action: func(c *cli.Context) error {
 						action.ImportGPM(c.String("file"))
+						return nil
 					},
 				},
 				{
@@ -358,8 +383,9 @@
 							Usage: "Save all of the discovered dependencies to a Glide YAML file.",
 						},
 					},
-					Action: func(c *cli.Context) {
+					Action: func(c *cli.Context) error {
 						action.ImportGB(c.String("file"))
+						return nil
 					},
 				},
 				{
@@ -371,8 +397,9 @@
 							Usage: "Save all of the discovered dependencies to a Glide YAML file.",
 						},
 					},
-					Action: func(c *cli.Context) {
+					Action: func(c *cli.Context) error {
 						action.ImportGom(c.String("file"))
+						return nil
 					},
 				},
 			},
@@ -381,8 +408,9 @@
 			Name:        "name",
 			Usage:       "Print the name of this project.",
 			Description: `Read the glide.yaml file and print the name given on the 'package' line.`,
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.Name()
+				return nil
 			},
 		},
 		{
@@ -404,8 +432,9 @@
 					Usage: "Specify this to prevent nv from append '/...' to all directories.",
 				},
 			},
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.NoVendor(c.String("dir"), true, !c.Bool("no-subdir"))
+				return nil
 			},
 		},
 		{
@@ -413,8 +442,9 @@
 			Usage: "Rebuild ('go build') the dependencies",
 			Description: `This rebuilds the packages' '.a' files. On some systems
 	this can improve performance on subsequent 'go run' and 'go build' calls.`,
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.Rebuild()
+				return nil
 			},
 		},
 		{
@@ -430,36 +460,43 @@
    from the lock file.`,
 			Flags: []cli.Flag{
 				cli.BoolFlag{
-					Name:  "delete",
-					Usage: "Delete vendor packages not specified in config.",
+					Name:   "delete",
+					Usage:  "Delete vendor packages not specified in config.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "force",
 					Usage: "If there was a change in the repo or VCS switch to new one. Warning: changes will be lost.",
 				},
 				cli.BoolFlag{
-					Name:  "update-vendored, u",
-					Usage: "Update vendored packages (without local VCS repo). Warning: this may destroy local modifications to vendor/.",
+					Name:   "update-vendored, u",
+					Usage:  "Update vendored packages (without local VCS repo). Warning: this may destroy local modifications to vendor/.",
+					Hidden: true,
 				},
 				cli.StringFlag{
-					Name:  "file, f",
-					Usage: "Save all of the discovered dependencies to a Glide YAML file. (DEPRECATED: This has no impact.)",
+					Name:   "file, f",
+					Usage:  "Save all of the discovered dependencies to a Glide YAML file. (DEPRECATED: This has no impact.)",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "cache",
-					Usage: "When downloading dependencies attempt to cache them.",
+					Name:   "cache",
+					Usage:  "When downloading dependencies attempt to cache them.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "cache-gopath",
-					Usage: "When downloading dependencies attempt to put them in the GOPATH, too.",
+					Name:   "cache-gopath",
+					Usage:  "When downloading dependencies attempt to put them in the GOPATH, too.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "use-gopath",
-					Usage: "Copy dependencies from the GOPATH if they exist there.",
+					Name:   "use-gopath",
+					Usage:  "Copy dependencies from the GOPATH if they exist there.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "strip-vcs, s",
-					Usage: "Removes version control metadata (e.g, .git directory) from the vendor folder.",
+					Name:   "strip-vcs, s",
+					Usage:  "Removes version control metadata (e.g, .git directory) from the vendor folder.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "strip-vendor, v",
@@ -470,22 +507,36 @@
 					Usage: "Resolve dependencies in test files.",
 				},
 			},
-			Action: func(c *cli.Context) {
-				if c.Bool("strip-vendor") && !c.Bool("strip-vcs") {
-					msg.Die("--strip-vendor cannot be used without --strip-vcs")
+			Action: func(c *cli.Context) error {
+				if c.Bool("delete") {
+					msg.Warn("The --delete flag is deprecated. This now works by default.")
+				}
+				if c.Bool("update-vendored") {
+					msg.Warn("The --update-vendored flag is deprecated. This now works by default.")
+				}
+				if c.String("file") != "" {
+					msg.Warn("The --flag flag is deprecated.")
+				}
+				if c.Bool("cache") {
+					msg.Warn("The --cache flag is deprecated. This now works by default.")
+				}
+				if c.Bool("cache-gopath") {
+					msg.Warn("The --cache-gopath flag is deprecated.")
+				}
+				if c.Bool("use-gopath") {
+					msg.Warn("The --use-gopath flag is deprecated. Please see overrides.")
+				}
+				if c.Bool("strip-vcs") {
+					msg.Warn("The --strip-vcs flag is deprecated. This now works by default.")
 				}
 
 				installer := repo.NewInstaller()
 				installer.Force = c.Bool("force")
-				installer.UseCache = c.Bool("cache")
-				installer.UseGopath = c.Bool("use-gopath")
-				installer.UseCacheGopath = c.Bool("cache-gopath")
-				installer.UpdateVendored = c.Bool("update-vendored")
 				installer.Home = c.GlobalString("home")
-				installer.DeleteUnused = c.Bool("delete")
 				installer.ResolveTest = !c.Bool("skip-test")
 
-				action.Install(installer, c.Bool("strip-vcs"), c.Bool("strip-vendor"))
+				action.Install(installer, c.Bool("strip-vendor"))
+				return nil
 			},
 		},
 		{
@@ -508,30 +559,16 @@
    It will create a glide.yaml file from the Godeps data, and then update. This
    has no effect if '--no-recursive' is set.
 
-   If you are storing the outside dependencies in your version control system
-   (VCS), also known as vendoring, there are a few flags that may be useful.
-   The '--update-vendored' flag will cause Glide to update packages when VCS
-   information is unavailable. This can be used with the '--strip-vcs' flag which
-   will strip VCS data found in the vendor directory. This is useful for
-   removing VCS data from transitive dependencies and initial setups. The
-   '--strip-vendor' flag will remove any nested 'vendor' folders and
+   The '--strip-vendor' flag will remove any nested 'vendor' folders and
    'Godeps/_workspace' folders after an update (along with undoing any Godep
    import rewriting). Note, The Godeps specific functionality is deprecated and
    will be removed when most Godeps users have migrated to using the vendor
-   folder.
-
-   Note, Glide detects vendored dependencies. With the '--update-vendored' flag
-   Glide will update vendored dependencies leaving them in a vendored state.
-   Tertiary dependencies will not be vendored automatically unless the
-   '--strip-vcs' flag is used along with it.
-
-   By default, packages that are discovered are considered transient, and are
-   not stored in the glide.yaml file. The --file=NAME.yaml flag allows you
-   to save the discovered dependencies to a YAML file.`,
+   folder.`,
 			Flags: []cli.Flag{
 				cli.BoolFlag{
-					Name:  "delete",
-					Usage: "Delete vendor packages not specified in config.",
+					Name:   "delete",
+					Usage:  "Delete vendor packages not specified in config.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "no-recursive, quick",
@@ -546,32 +583,38 @@
 					Usage: "This will resolve all dependencies for all packages, not just those directly used.",
 				},
 				cli.BoolFlag{
-					Name:  "update-vendored, u",
-					Usage: "Update vendored packages (without local VCS repo). Warning, changes will be lost.",
+					Name:   "update-vendored, u",
+					Usage:  "Update vendored packages (without local VCS repo). Warning, changes will be lost.",
+					Hidden: true,
 				},
 				cli.StringFlag{
-					Name:  "file, f",
-					Usage: "Save all of the discovered dependencies to a Glide YAML file.",
+					Name:   "file, f",
+					Usage:  "Save all of the discovered dependencies to a Glide YAML file.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "cache",
-					Usage: "When downloading dependencies attempt to cache them.",
+					Name:   "cache",
+					Usage:  "When downloading dependencies attempt to cache them.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "cache-gopath",
-					Usage: "When downloading dependencies attempt to put them in the GOPATH, too.",
+					Name:   "cache-gopath",
+					Usage:  "When downloading dependencies attempt to put them in the GOPATH, too.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
-					Name:  "use-gopath",
-					Usage: "Copy dependencies from the GOPATH if they exist there.",
+					Name:   "use-gopath",
+					Usage:  "Copy dependencies from the GOPATH if they exist there.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "resolve-current",
 					Usage: "Resolve dependencies for only the current system rather than all build modes.",
 				},
 				cli.BoolFlag{
-					Name:  "strip-vcs, s",
-					Usage: "Removes version control metadata (e.g, .git directory) from the vendor folder.",
+					Name:   "strip-vcs, s",
+					Usage:  "Removes version control metadata (e.g, .git directory) from the vendor folder.",
+					Hidden: true,
 				},
 				cli.BoolFlag{
 					Name:  "strip-vendor, v",
@@ -582,9 +625,27 @@
 					Usage: "Resolve dependencies in test files.",
 				},
 			},
-			Action: func(c *cli.Context) {
-				if c.Bool("strip-vendor") && !c.Bool("strip-vcs") {
-					msg.Die("--strip-vendor cannot be used without --strip-vcs")
+			Action: func(c *cli.Context) error {
+				if c.Bool("delete") {
+					msg.Warn("The --delete flag is deprecated. This now works by default.")
+				}
+				if c.Bool("update-vendored") {
+					msg.Warn("The --update-vendored flag is deprecated. This now works by default.")
+				}
+				if c.String("file") != "" {
+					msg.Warn("The --flag flag is deprecated.")
+				}
+				if c.Bool("cache") {
+					msg.Warn("The --cache flag is deprecated. This now works by default.")
+				}
+				if c.Bool("cache-gopath") {
+					msg.Warn("The --cache-gopath flag is deprecated.")
+				}
+				if c.Bool("use-gopath") {
+					msg.Warn("The --use-gopath flag is deprecated. Please see overrides.")
+				}
+				if c.Bool("strip-vcs") {
+					msg.Warn("The --strip-vcs flag is deprecated. This now works by default.")
 				}
 
 				if c.Bool("resolve-current") {
@@ -594,16 +655,13 @@
 
 				installer := repo.NewInstaller()
 				installer.Force = c.Bool("force")
-				installer.UseCache = c.Bool("cache")
-				installer.UseGopath = c.Bool("use-gopath")
-				installer.UseCacheGopath = c.Bool("cache-gopath")
-				installer.UpdateVendored = c.Bool("update-vendored")
 				installer.ResolveAllFiles = c.Bool("all-dependencies")
 				installer.Home = c.GlobalString("home")
-				installer.DeleteUnused = c.Bool("delete")
 				installer.ResolveTest = !c.Bool("skip-test")
 
-				action.Update(installer, c.Bool("no-recursive"), c.Bool("strip-vcs"), c.Bool("strip-vendor"))
+				action.Update(installer, c.Bool("no-recursive"), c.Bool("strip-vendor"))
+
+				return nil
 			},
 		},
 		{
@@ -615,8 +673,9 @@
    It ignores testdata/ and directories that begin with . or _. Packages in
    vendor/ are only included if they are referenced by the main project or
    one of its dependencies.`,
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.Tree(".", false)
+				return nil
 			},
 		},
 		{
@@ -629,8 +688,9 @@
 
    Directories that begin with . or _ are ignored, as are testdata directories. Packages in
    vendor are only included if they are used by the project.`,
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.List(".", true, c.String("output"))
+				return nil
 			},
 			Flags: []cli.Flag{
 				cli.StringFlag{
@@ -674,27 +734,114 @@
 
        glide info -f "%n - %d - %h - %l"
           prints 'foo - Some example description - https://example.com - MIT'`,
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				if c.IsSet("format") {
 					action.Info(c.String("format"))
 				} else {
 					cli.ShowCommandHelp(c, c.Command.Name)
 				}
+				return nil
 			},
 		},
 		{
 			Name:      "cache-clear",
 			ShortName: "cc",
 			Usage:     "Clears the Glide cache.",
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.CacheClear()
+				return nil
 			},
 		},
 		{
 			Name:  "about",
 			Usage: "Learn about Glide",
-			Action: func(c *cli.Context) {
+			Action: func(c *cli.Context) error {
 				action.About()
+				return nil
+			},
+		},
+		{
+			Name:  "override",
+			Usage: "Manage overrides",
+			Description: `Overrides provide the ability to replace a repo location with
+   another location. This is useful when you want to have a cache for your
+   continious integration (CI) system or if you want to work on a dependency
+   in a local location, such as the GOPATH.
+
+   The overrides are stored in an overrides.yaml file in your GLIDE_HOME.
+
+   The three commands to manager overrides are 'list', 'set', and 'remove'.
+
+   Use 'set' in the form:
+
+       glide override set [original] [replacement]
+
+   or
+
+       glide override set [original] [replacement] --vcs [type]
+
+   for example,
+
+       glide override set https://github.com/example/foo https://git.example.com/example/foo.git
+
+       glide override set https://github.com/example/foo file:///path/to/local/repo --vcs git
+
+   Use 'remove' in the form:
+
+       glide override remove [original]
+
+   for example,
+
+       glide override remove https://github.com/example/foo`,
+			Subcommands: []cli.Command{
+				{
+					Name:  "list",
+					Usage: "List the current overrides",
+					Action: func(c *cli.Context) error {
+						return action.OverridesList()
+					},
+				},
+				{
+					Name:  "set",
+					Usage: "Set an override. This overwrites an existing entry if one exists",
+					Description: `Use 'set' in the form:
+
+       glide override set [original] [replacement]
+
+   or
+
+       glide override set [original] [replacement] --vcs [type]
+
+   for example,
+
+       glide override set https://github.com/example/foo https://git.example.com/example/foo.git
+
+       glide override set https://github.com/example/foo file:///path/to/local/repo --vcs git`,
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "vcs",
+							Usage: "The VCS type to use. Autodiscovery is attempted when not supplied. Can be one of git, svn, bzr, or hg",
+						},
+					},
+					Action: func(c *cli.Context) error {
+						return action.OverridesSet(c.Args().Get(0), c.Args().Get(1), c.String("vcs"))
+					},
+				},
+				{
+					Name:      "remove",
+					ShortName: "rm",
+					Usage:     "Remove an override",
+					Description: `Use 'remove' in the form:
+
+       glide override remove [original]
+
+   for example,
+
+       glide override remove https://github.com/example/foo`,
+					Action: func(c *cli.Context) error {
+						return action.OverridesRemove(c.Args().Get(0))
+					},
+				},
 			},
 		},
 	}
diff --git a/glide.lock b/glide.lock
index c869e2f..2d3fc9c 100644
--- a/glide.lock
+++ b/glide.lock
@@ -1,12 +1,12 @@
-hash: 0653c17bcbf6f1df79990f3d2211dbcbc920ca528c513b00f5cab0a508c984ab
-updated: 2016-06-30T10:51:49.633776379-04:00
+hash: 67c5571c33bfcb663d32d2b40b9ce1f2a05a3fa2e9f442077277c2782195729c
+updated: 2016-08-11T14:22:17.773372627-04:00
 imports:
 - name: github.com/codegangsta/cli
-  version: 71f57d300dd6a780ac1856c005c4b518cfd498ec
+  version: 1efa31f08b9333f1bd4882d61f9d668a70cd902e
 - name: github.com/Masterminds/semver
   version: 8d0431362b544d1a3536cca26684828866a7de09
 - name: github.com/Masterminds/vcs
   version: fbe9fb6ad5b5f35b3e82a7c21123cfc526cbf895
 - name: gopkg.in/yaml.v2
-  version: a83829b6f1293c91addabc89d0571c246397bbf4
+  version: e4d366fc3c7938e2958e662b4258c7a89e1f0e3e
 testImports: []
diff --git a/glide.yaml b/glide.yaml
index dfc97e9..f293f35 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -13,6 +13,6 @@
 - package: github.com/Masterminds/vcs
   version: ^1.8.0
 - package: github.com/codegangsta/cli
-  version: ~1.14.0
+  version: ^1.16.0
 - package: github.com/Masterminds/semver
   version: ^1.1.1
diff --git a/overrides/cfg.go b/overrides/cfg.go
new file mode 100644
index 0000000..d79284e
--- /dev/null
+++ b/overrides/cfg.go
@@ -0,0 +1,98 @@
+package overrides
+
+import (
+	"io/ioutil"
+	"sort"
+	"strings"
+
+	"gopkg.in/yaml.v2"
+)
+
+// Overrides contains global overrides to local configuration
+type Overrides struct {
+
+	// Repos contains repo override configuration
+	Repos OverrideRepos `yaml:"repos"`
+}
+
+// Marshal converts an Overrides instance to YAML
+func (ov *Overrides) Marshal() ([]byte, error) {
+	yml, err := yaml.Marshal(&ov)
+	if err != nil {
+		return []byte{}, err
+	}
+	return yml, nil
+}
+
+// WriteFile writes an overrides.yaml file
+//
+// This is a convenience function that marshals the YAML and then writes it to
+// the given file. If the file exists, it will be clobbered.
+func (ov *Overrides) WriteFile(opath string) error {
+	o, err := ov.Marshal()
+	if err != nil {
+		return err
+	}
+	return ioutil.WriteFile(opath, o, 0666)
+}
+
+// ReadOverridesFile loads the contents of an overrides.yaml file.
+func ReadOverridesFile(opath string) (*Overrides, error) {
+	yml, err := ioutil.ReadFile(opath)
+	if err != nil {
+		return nil, err
+	}
+	ov, err := FromYaml(yml)
+	if err != nil {
+		return nil, err
+	}
+	return ov, nil
+}
+
+// FromYaml returns an instance of Overrides from YAML
+func FromYaml(yml []byte) (*Overrides, error) {
+	ov := &Overrides{}
+	err := yaml.Unmarshal([]byte(yml), &ov)
+	return ov, err
+}
+
+// MarshalYAML is a hook for gopkg.in/yaml.v2.
+// It sorts override repos lexicographically for reproducibility.
+func (ov *Overrides) MarshalYAML() (interface{}, error) {
+
+	sort.Sort(ov.Repos)
+
+	return ov, nil
+}
+
+// OverrideRepos is a slice of Override pointers
+type OverrideRepos []*OverrideRepo
+
+// Len returns the length of the OverrideRepos. This is needed for sorting with
+// the sort package.
+func (o OverrideRepos) Len() int {
+	return len(o)
+}
+
+// Less is needed for the sort interface. It compares two OverrideRepos based on
+// their original value.
+func (o OverrideRepos) Less(i, j int) bool {
+
+	// Names are normalized to lowercase because case affects sorting order. For
+	// example, Masterminds comes before kylelemons. Making them lowercase
+	// causes kylelemons to come first which is what is expected.
+	return strings.ToLower(o[i].Original) < strings.ToLower(o[j].Original)
+}
+
+// Swap is needed for the sort interface. It swaps the position of two
+// OverrideRepos.
+func (o OverrideRepos) Swap(i, j int) {
+	o[i], o[j] = o[j], o[i]
+}
+
+// OverrideRepo represents a single repo override
+type OverrideRepo struct {
+	Original string `yaml:"original"`
+	Repo     string `yaml:"repo"`
+	Vcs      string `yaml:"vcs,omitempty"`
+}
diff --git a/overrides/overrides.go b/overrides/overrides.go
new file mode 100644
index 0000000..8299ede
--- /dev/null
+++ b/overrides/overrides.go
@@ -0,0 +1,66 @@
+// Package overrides handles managing overrides in the running application
+package overrides
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/Masterminds/glide/msg"
+	gpath "github.com/Masterminds/glide/path"
+)
+
+var overrides map[string]*override
+
+func init() {
+	overrides = make(map[string]*override)
+}
+
+type override struct {
+	Repo, Vcs string
+}
+
+// Get retrieves informtion about an override. It returns.
+// - bool if found
+// - new repo location
+// - vcs type
+func Get(k string) (bool, string, string) {
+	o, f := overrides[k]
+	if !f {
+		return false, "", ""
+	}
+
+	return true, o.Repo, o.Vcs
+}
+
+// Load pulls the overrides into memory
+func Load() error {
+	home := gpath.Home()
+
+	op := filepath.Join(home, "overrides.yaml")
+
+	var ov *Overrides
+	if _, err := os.Stat(op); os.IsNotExist(err) {
+		msg.Debug("No overrides.yaml file exists")
+		ov = &Overrides{
+			Repos: make(OverrideRepos, 0),
+		}
+	} else {
+		ov, err = ReadOverridesFile(op)
+		if err != nil {
+			return fmt.Errorf("Error reading existing overrides.yaml file: %s", err)
+		}
+	}
+
+	msg.Info("Loading overrides from overrides.yaml file")
+	for _, o := range ov.Repos {
+		msg.Debug("Found override: %s to %s (%s)", o.Original, o.Repo, o.Vcs)
+		no := &override{
+			Repo: o.Repo,
+			Vcs:  o.Vcs,
+		}
+		overrides[o.Original] = no
+	}
+
+	return nil
+}
diff --git a/overrides/overrides_test.go b/overrides/overrides_test.go
new file mode 100644
index 0000000..dddc500
--- /dev/null
+++ b/overrides/overrides_test.go
@@ -0,0 +1,36 @@
+package overrides
+
+import "testing"
+
+var oyml = `
+repos:
+- original: github.com/Masterminds/semver
+  repo: file:///path/to/local/repo
+  vcs: git
+- original: github.com/Masterminds/atest
+  repo: github.com/example/atest
+`
+
+var ooutyml = `repos:
+- original: github.com/Masterminds/atest
+  repo: github.com/example/atest
+- original: github.com/Masterminds/semver
+  repo: file:///path/to/local/repo
+  vcs: git
+`
+
+func TestSortOverrides(t *testing.T) {
+	ov, err := FromYaml([]byte(oyml))
+	if err != nil {
+		t.Error("Unable to read overrides yaml")
+	}
+
+	out, err := ov.Marshal()
+	if err != nil {
+		t.Error("Unable to marshal overrides yaml")
+	}
+
+	if string(out) != ooutyml {
+		t.Error("Output overrides sorting failed")
+	}
+}
diff --git a/path/strip.go b/path/strip.go
index be00be9..62c5fd8 100644
--- a/path/strip.go
+++ b/path/strip.go
@@ -8,35 +8,6 @@
 	"github.com/Masterminds/glide/msg"
 )
 
-// StripVcs removes VCS metadata (.git, .hg, .bzr, .svn) from the vendor/
-// directory.
-func StripVcs() error {
-	searchPath, _ := Vendor()
-	if _, err := os.Stat(searchPath); err != nil {
-		if os.IsNotExist(err) {
-			msg.Debug("Vendor directory does not exist.")
-		}
-
-		return err
-	}
-
-	return filepath.Walk(searchPath, func(path string, info os.FileInfo, err error) error {
-		name := info.Name()
-		if name == ".git" || name == ".bzr" || name == ".svn" || name == ".hg" {
-			if _, err := os.Stat(path); err == nil {
-				if info.IsDir() {
-					msg.Info("Removing: %s", path)
-					return os.RemoveAll(path)
-				}
-
-				msg.Debug("%s is not a directory. Skipping removal", path)
-				return nil
-			}
-		}
-		return nil
-	})
-}
-
 // StripVendor removes nested vendor and Godeps/_workspace/ directories.
 func StripVendor() error {
 	searchPath, _ := Vendor()
diff --git a/path/strip_test.go b/path/strip_test.go
deleted file mode 100644
index 23e9d94..0000000
--- a/path/strip_test.go
+++ /dev/null
@@ -1,75 +0,0 @@
-package path
-
-import (
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"testing"
-)
-
-func TestStripVcs(t *testing.T) {
-	tempDir, err := ioutil.TempDir("", "strip-vcs")
-	if err != nil {
-		t.Error(err)
-	}
-
-	defer func() {
-		err = os.RemoveAll(tempDir)
-		if err != nil {
-			t.Error(err)
-		}
-	}()
-
-	// Make VCS directories.
-	v := filepath.Join(tempDir, VendorDir)
-	err = os.Mkdir(v, 0755)
-	if err != nil {
-		t.Error(err)
-	}
-
-	gp := filepath.Join(tempDir, VendorDir, ".git")
-	err = os.Mkdir(gp, 0755)
-	if err != nil {
-		t.Error(err)
-	}
-
-	bp := filepath.Join(tempDir, VendorDir, ".bzr")
-	err = os.Mkdir(bp, 0755)
-	if err != nil {
-		t.Error(err)
-	}
-
-	hp := filepath.Join(tempDir, VendorDir, ".hg")
-	err = os.Mkdir(hp, 0755)
-	if err != nil {
-		t.Error(err)
-	}
-
-	sp := filepath.Join(tempDir, VendorDir, ".svn")
-	err = os.Mkdir(sp, 0755)
-	if err != nil {
-		t.Error(err)
-	}
-
-	wd, _ := os.Getwd()
-	os.Chdir(tempDir)
-
-	if err := StripVcs(); err != nil {
-		t.Errorf("Failed to strip vcs: %s", err)
-	}
-
-	os.Chdir(wd)
-
-	if _, err := os.Stat(gp); !os.IsNotExist(err) {
-		t.Error(".git directory not deleted")
-	}
-	if _, err := os.Stat(hp); !os.IsNotExist(err) {
-		t.Error(".hg directory not deleted")
-	}
-	if _, err := os.Stat(bp); !os.IsNotExist(err) {
-		t.Error(".bzr directory not deleted")
-	}
-	if _, err := os.Stat(sp); !os.IsNotExist(err) {
-		t.Error(".svn directory not deleted")
-	}
-}
diff --git a/repo/installer.go b/repo/installer.go
index 5fd8562..661106e 100644
--- a/repo/installer.go
+++ b/repo/installer.go
@@ -32,20 +32,6 @@
 	// Vendor contains the path to put the vendor packages
 	Vendor string
 
-	// Use a cache
-	UseCache bool
-	// Use Gopath to cache
-	UseCacheGopath bool
-	// Use Gopath as a source to read from
-	UseGopath bool
-
-	// UpdateVendored instructs the environment to update in a way that is friendly
-	// to packages that have been "vendored in" (e.g. are copies of source, not repos)
-	UpdateVendored bool
-
-	// DeleteUnused deletes packages that are unused, but found in the vendor dir.
-	DeleteUnused bool
-
 	// ResolveAllFiles enables a resolver that will examine the dependencies
 	// of every file of every package, rather than only following imported
 	// packages.
@@ -82,11 +68,6 @@
 // Install installs the dependencies from a Lockfile.
 func (i *Installer) Install(lock *cfg.Lockfile, conf *cfg.Config) (*cfg.Config, error) {
 
-	cwd, err := gpath.Vendor()
-	if err != nil {
-		return conf, err
-	}
-
 	// Create a config setup based on the Lockfile data to process with
 	// existing commands.
 	newConf := &cfg.Config{}
@@ -111,9 +92,13 @@
 
 	msg.Info("Downloading dependencies. Please wait...")
 
-	LazyConcurrentUpdate(newConf.Imports, cwd, i, newConf)
-	LazyConcurrentUpdate(newConf.DevImports, cwd, i, newConf)
-	return newConf, nil
+	err := LazyConcurrentUpdate(newConf.Imports, i, newConf)
+	if err != nil {
+		return newConf, err
+	}
+	err = LazyConcurrentUpdate(newConf.DevImports, i, newConf)
+
+	return newConf, err
 }
 
 // Checkout reads the config file and checks out all dependencies mentioned there.
@@ -122,16 +107,14 @@
 // vendor directory based on changed config.
 func (i *Installer) Checkout(conf *cfg.Config) error {
 
-	dest := i.VendorPath()
-
 	msg.Info("Downloading dependencies. Please wait...")
 
-	if err := ConcurrentUpdate(conf.Imports, dest, i, conf); err != nil {
+	if err := ConcurrentUpdate(conf.Imports, i, conf); err != nil {
 		return err
 	}
 
 	if i.ResolveTest {
-		return ConcurrentUpdate(conf.DevImports, dest, i, conf)
+		return ConcurrentUpdate(conf.DevImports, i, conf)
 	}
 
 	return nil
@@ -152,16 +135,11 @@
 
 	m := &MissingPackageHandler{
 		destination: vpath,
-
-		cache:          i.UseCache,
-		cacheGopath:    i.UseCacheGopath,
-		useGopath:      i.UseGopath,
-		home:           i.Home,
-		force:          i.Force,
-		updateVendored: i.UpdateVendored,
-		Config:         conf,
-		Use:            ic,
-		updated:        i.Updated,
+		home:        i.Home,
+		force:       i.Force,
+		Config:      conf,
+		Use:         ic,
+		updated:     i.Updated,
 	}
 
 	v := &VersionHandler{
@@ -251,13 +229,13 @@
 
 	msg.Info("Downloading dependencies. Please wait...")
 
-	err = ConcurrentUpdate(conf.Imports, vpath, i, conf)
+	err = ConcurrentUpdate(conf.Imports, i, conf)
 	if err != nil {
 		return err
 	}
 
 	if i.ResolveTest {
-		err = ConcurrentUpdate(conf.DevImports, vpath, i, conf)
+		err = ConcurrentUpdate(conf.DevImports, i, conf)
 		if err != nil {
 			return err
 		}
@@ -266,6 +244,85 @@
 	return nil
 }
 
+// Export from the cache to the vendor directory
+func (i *Installer) Export(conf *cfg.Config) error {
+	msg.Info("Removing existing vendor dependencies")
+	err := os.RemoveAll(i.VendorPath())
+	if err != nil {
+		return err
+	}
+	msg.Info("Exporting resolved dependencies to vendor directory")
+	done := make(chan struct{}, concurrentWorkers)
+	in := make(chan *cfg.Dependency, concurrentWorkers)
+	var wg sync.WaitGroup
+	var lock sync.Mutex
+	var returnErr error
+
+	for ii := 0; ii < concurrentWorkers; ii++ {
+		go func(ch <-chan *cfg.Dependency) {
+			for {
+				select {
+				case dep := <-ch:
+					loc := dep.Remote()
+					key, err := cache.Key(loc)
+					if err != nil {
+						msg.Die(err.Error())
+					}
+					cache.Lock(key)
+
+					cdir := filepath.Join(cache.Location(), "src", key)
+					repo, err := dep.GetRepo(cdir)
+					if err != nil {
+						msg.Die(err.Error())
+					}
+					msg.Info("--> Exporting %s", dep.Name)
+					if err := repo.ExportDir(filepath.Join(i.VendorPath(), filepath.ToSlash(dep.Name))); err != nil {
+						msg.Err("Export failed for %s: %s\n", dep.Name, err)
+						// Capture the error while making sure the concurrent
+						// operations don't step on each other.
+						lock.Lock()
+						if returnErr == nil {
+							returnErr = err
+						} else {
+							returnErr = cli.NewMultiError(returnErr, err)
+						}
+						lock.Unlock()
+					}
+					cache.Unlock(key)
+					wg.Done()
+				case <-done:
+					return
+				}
+			}
+		}(in)
+	}
+
+	for _, dep := range conf.Imports {
+		if !conf.HasIgnore(dep.Name) {
+			wg.Add(1)
+			in <- dep
+		}
+	}
+
+	if i.ResolveTest {
+		for _, dep := range conf.DevImports {
+			if !conf.HasIgnore(dep.Name) {
+				wg.Add(1)
+				in <- dep
+			}
+		}
+	}
+
+	wg.Wait()
+
+	// Close goroutines setting the version
+	for ii := 0; ii < concurrentWorkers; ii++ {
+		done <- struct{}{}
+	}
+
+	return returnErr
+}
+
 // List resolves the complete dependency tree and returns a list of dependencies.
 func (i *Installer) List(conf *cfg.Config) []*cfg.Dependency {
 	base := "."
@@ -311,11 +368,17 @@
 // LazyConcurrentUpdate updates only deps that are not already checkout out at the right version.
 //
 // This is only safe when updating from a lock file.
-func LazyConcurrentUpdate(deps []*cfg.Dependency, cwd string, i *Installer, c *cfg.Config) error {
+func LazyConcurrentUpdate(deps []*cfg.Dependency, i *Installer, c *cfg.Config) error {
 
 	newDeps := []*cfg.Dependency{}
 	for _, dep := range deps {
-		destPath := filepath.Join(i.VendorPath(), dep.Name)
+
+		key, err := cache.Key(dep.Remote())
+		if err != nil {
+			newDeps = append(newDeps, dep)
+			continue
+		}
+		destPath := filepath.Join(cache.Location(), "src", key)
 
 		// Get a VCS object for this directory
 		repo, err := dep.GetRepo(destPath)
@@ -329,24 +392,26 @@
 			newDeps = append(newDeps, dep)
 			continue
 		}
-
-		if ver == dep.Reference {
-			msg.Info("--> Found desired version %s %s!", dep.Name, dep.Reference)
-			continue
+		if dep.Reference != "" {
+			ci, err := repo.CommitInfo(dep.Reference)
+			if err == nil && ci.Commit == dep.Reference {
+				msg.Info("--> Found desired version locally %s %s!", dep.Name, dep.Reference)
+				continue
+			}
 		}
 
 		msg.Debug("--> Queue %s for update (%s != %s).", dep.Name, ver, dep.Reference)
 		newDeps = append(newDeps, dep)
 	}
 	if len(newDeps) > 0 {
-		return ConcurrentUpdate(newDeps, cwd, i, c)
+		return ConcurrentUpdate(newDeps, i, c)
 	}
 
 	return nil
 }
 
 // ConcurrentUpdate takes a list of dependencies and updates in parallel.
-func ConcurrentUpdate(deps []*cfg.Dependency, cwd string, i *Installer, c *cfg.Config) error {
+func ConcurrentUpdate(deps []*cfg.Dependency, i *Installer, c *cfg.Config) error {
 	done := make(chan struct{}, concurrentWorkers)
 	in := make(chan *cfg.Dependency, concurrentWorkers)
 	var wg sync.WaitGroup
@@ -358,19 +423,13 @@
 			for {
 				select {
 				case dep := <-ch:
-					var loc string
-					if dep.Repository != "" {
-						loc = dep.Repository
-					} else {
-						loc = "https://" + dep.Name
-					}
+					loc := dep.Remote()
 					key, err := cache.Key(loc)
 					if err != nil {
 						msg.Die(err.Error())
 					}
 					cache.Lock(key)
-					dest := filepath.Join(i.VendorPath(), dep.Name)
-					if err := VcsUpdate(dep, dest, i.Home, i.UseCache, i.UseCacheGopath, i.UseGopath, i.Force, i.UpdateVendored, i.Updated); err != nil {
+					if err := VcsUpdate(dep, i.Force, i.Updated); err != nil {
 						msg.Err("Update failed for %s: %s\n", dep.Name, err)
 						// Capture the error while making sure the concurrent
 						// operations don't step on each other.
@@ -436,12 +495,12 @@
 //
 // When a package is found on the GOPATH, this notifies the user.
 type MissingPackageHandler struct {
-	destination                                          string
-	home                                                 string
-	cache, cacheGopath, useGopath, force, updateVendored bool
-	Config                                               *cfg.Config
-	Use                                                  *importCache
-	updated                                              *UpdateTracker
+	destination string
+	home        string
+	force       bool
+	Config      *cfg.Config
+	Use         *importCache
+	updated     *UpdateTracker
 }
 
 // NotFound attempts to retrieve a package when not found in the local vendor/
@@ -497,7 +556,7 @@
 			m.Config.Imports = append(m.Config.Imports, d)
 		}
 	}
-	if err := VcsGet(d, dest, m.home, m.cache, m.cacheGopath, m.useGopath); err != nil {
+	if err := VcsGet(d); err != nil {
 		return false, err
 	}
 	return true, nil
@@ -507,11 +566,6 @@
 // vendor/ directory or download it from the internet. This is dependent if
 // useGopath on the installer is set to true to copy from the GOPATH.
 func (m *MissingPackageHandler) OnGopath(pkg string, addTest bool) (bool, error) {
-	// If useGopath is false, we fall back to the strategy of fetching from
-	// remote.
-	if !m.useGopath {
-		return m.NotFound(pkg, addTest)
-	}
 
 	root := util.GetRootFromPackage(pkg)
 
@@ -550,8 +604,6 @@
 		return nil
 	}
 
-	dest := filepath.Join(m.destination, root)
-
 	d := m.Config.Imports.Get(root)
 	if d == nil && addTest {
 		d = m.Config.DevImports.Get(root)
@@ -572,13 +624,39 @@
 		}
 	}
 
-	if err := VcsUpdate(d, dest, m.home, m.cache, m.cacheGopath, m.useGopath, m.force, m.updateVendored, m.updated); err != nil {
+	if err := VcsUpdate(d, m.force, m.updated); err != nil {
 		return err
 	}
 
 	return nil
 }
 
+// PkgPath resolves the location on the filesystem where the package should be.
+// This handles making sure to use the cache location.
+func (m *MissingPackageHandler) PkgPath(pkg string) string {
+	root, sub := util.NormalizeName(pkg)
+
+	d := m.Config.Imports.Get(root)
+	if d == nil {
+		d = m.Config.DevImports.Get(root)
+	}
+
+	if d == nil {
+		d, _ = m.Use.Get(root)
+
+		if d == nil {
+			d = &cfg.Dependency{Name: root}
+		}
+	}
+
+	key, err := cache.Key(d.Remote())
+	if err != nil {
+		msg.Die("Error generating cache key for %s", d.Name)
+	}
+
+	return filepath.Join(cache.Location(), "src", key, sub)
+}
+
 // VersionHandler handles setting the proper version in the VCS.
 type VersionHandler struct {
 
@@ -703,7 +781,7 @@
 		}
 	}
 
-	err := VcsVersion(dep, d.Destination)
+	err := VcsVersion(dep)
 	if err != nil {
 		msg.Warn("Unable to set version on %s to %s. Err: %s", root, dep.Reference, err)
 		e = err
diff --git a/repo/set_reference.go b/repo/set_reference.go
index f5891ac..d9899ec 100644
--- a/repo/set_reference.go
+++ b/repo/set_reference.go
@@ -6,7 +6,6 @@
 	"github.com/Masterminds/glide/cache"
 	"github.com/Masterminds/glide/cfg"
 	"github.com/Masterminds/glide/msg"
-	gpath "github.com/Masterminds/glide/path"
 	"github.com/codegangsta/cli"
 )
 
@@ -14,11 +13,6 @@
 // a project.
 func SetReference(conf *cfg.Config, resolveTest bool) error {
 
-	cwd, err := gpath.Vendor()
-	if err != nil {
-		return err
-	}
-
 	if len(conf.Imports) == 0 && len(conf.DevImports) == 0 {
 		msg.Info("No references set.\n")
 		return nil
@@ -35,6 +29,7 @@
 			for {
 				select {
 				case dep := <-ch:
+
 					var loc string
 					if dep.Repository != "" {
 						loc = dep.Repository
@@ -46,7 +41,7 @@
 						msg.Die(err.Error())
 					}
 					cache.Lock(key)
-					if err := VcsVersion(dep, cwd); err != nil {
+					if err := VcsVersion(dep); err != nil {
 						msg.Err("Failed to set version on %s to %s: %s\n", dep.Name, dep.Reference, err)
 
 						// Capture the error while making sure the concurrent
diff --git a/repo/vcs.go b/repo/vcs.go
index 3f5f80d..76349c9 100644
--- a/repo/vcs.go
+++ b/repo/vcs.go
@@ -21,7 +21,7 @@
 )
 
 // VcsUpdate updates to a particular checkout based on the VCS setting.
-func VcsUpdate(dep *cfg.Dependency, dest, home string, cache, cacheGopath, useGopath, force, updateVendored bool, updated *UpdateTracker) error {
+func VcsUpdate(dep *cfg.Dependency, force bool, updated *UpdateTracker) error {
 
 	// If the dependency has already been pinned we can skip it. This is a
 	// faster path so we don't need to resolve it again.
@@ -43,9 +43,16 @@
 		return nil
 	}
 
+	key, err := cp.Key(dep.Remote())
+	if err != nil {
+		msg.Die("Cache key generation error: %s", err)
+	}
+	location := cp.Location()
+	dest := filepath.Join(location, "src", key)
+
 	// If destination doesn't exist we need to perform an initial checkout.
 	if _, err := os.Stat(dest); os.IsNotExist(err) {
-		if err = VcsGet(dep, dest, home, cache, cacheGopath, useGopath); err != nil {
+		if err = VcsGet(dep); err != nil {
 			msg.Warn("Unable to checkout %s\n", dep.Name)
 			return err
 		}
@@ -59,40 +66,18 @@
 			return err
 		}
 		_, err = v.DetectVcsFromFS(dest)
-		if updateVendored == false && empty == false && err == v.ErrCannotDetectVCS {
-			msg.Warn("%s appears to be a vendored package. Unable to update. Consider the '--update-vendored' flag.\n", dep.Name)
-		} else if updateVendored == false && empty == true && err == v.ErrCannotDetectVCS {
-			msg.Warn("%s is an empty directory. Fetching a new copy of the dependency.", dep.Name)
+		if empty == true && err == v.ErrCannotDetectVCS {
+			msg.Warn("Cached version of %s is an empty directory. Fetching a new copy of the dependency.", dep.Name)
 			msg.Debug("Removing empty directory %s", dest)
 			err := os.RemoveAll(dest)
 			if err != nil {
 				return err
 			}
-			if err = VcsGet(dep, dest, home, cache, cacheGopath, useGopath); err != nil {
+			if err = VcsGet(dep); err != nil {
 				msg.Warn("Unable to checkout %s\n", dep.Name)
 				return err
 			}
 		} else {
-
-			if updateVendored == true && empty == false && err == v.ErrCannotDetectVCS {
-				// A vendored package, no repo, and updating the vendored packages
-				// has been opted into.
-				msg.Info("%s is a vendored package. Updating.", dep.Name)
-				err = os.RemoveAll(dest)
-				if err != nil {
-					msg.Err("Unable to update vendored dependency %s.\n", dep.Name)
-					return err
-				}
-				dep.UpdateAsVendored = true
-
-				if err = VcsGet(dep, dest, home, cache, cacheGopath, useGopath); err != nil {
-					msg.Warn("Unable to checkout %s\n", dep.Name)
-					return err
-				}
-
-				return nil
-			}
-
 			repo, err := dep.GetRepo(dest)
 
 			// Tried to checkout a repo to a path that does not work. Either the
@@ -101,19 +86,14 @@
 			// Warning, any changes in the old location will be deleted.
 			// TODO: Put dirty checking in on the existing local checkout.
 			if (err == v.ErrWrongVCS || err == v.ErrWrongRemote) && force == true {
-				var newRemote string
-				if len(dep.Repository) > 0 {
-					newRemote = dep.Repository
-				} else {
-					newRemote = "https://" + dep.Name
-				}
+				newRemote := dep.Remote()
 
 				msg.Warn("Replacing %s with contents from %s\n", dep.Name, newRemote)
 				rerr := os.RemoveAll(dest)
 				if rerr != nil {
 					return rerr
 				}
-				if err = VcsGet(dep, dest, home, cache, cacheGopath, useGopath); err != nil {
+				if err = VcsGet(dep); err != nil {
 					msg.Warn("Unable to checkout %s\n", dep.Name)
 					return err
 				}
@@ -128,16 +108,20 @@
 				return fmt.Errorf("%s contains uncommitted changes. Skipping update", dep.Name)
 			}
 
+			ver := dep.Reference
+			if ver == "" {
+				ver = defaultBranch(repo)
+			}
 			// Check if the current version is a tag or commit id. If it is
 			// and that version is already checked out we can skip updating
 			// which is faster than going out to the Internet to perform
 			// an update.
-			if dep.Reference != "" {
+			if ver != "" {
 				version, err := repo.Version()
 				if err != nil {
 					return err
 				}
-				ib, err := isBranch(dep.Reference, repo)
+				ib, err := isBranch(ver, repo)
 				if err != nil {
 					return err
 				}
@@ -145,7 +129,7 @@
 				// If the current version equals the ref and it's not a
 				// branch it's a tag or commit id so we can skip
 				// performing an update.
-				if version == dep.Reference && !ib {
+				if version == ver && !ib {
 					msg.Debug("%s is already set to version %s. Skipping update.", dep.Name, dep.Reference)
 					return nil
 				}
@@ -162,7 +146,7 @@
 }
 
 // VcsVersion set the VCS version for a checkout.
-func VcsVersion(dep *cfg.Dependency, vend string) error {
+func VcsVersion(dep *cfg.Dependency) error {
 
 	// If the dependency has already been pinned we can skip it. This is a
 	// faster path so we don't need to resolve it again.
@@ -171,7 +155,12 @@
 		return nil
 	}
 
-	cwd := filepath.Join(vend, dep.Name)
+	key, err := cp.Key(dep.Remote())
+	if err != nil {
+		msg.Die("Cache key generation error: %s", err)
+	}
+	location := cp.Location()
+	cwd := filepath.Join(location, "src", key)
 
 	// If there is no reference configured there is nothing to set.
 	if dep.Reference == "" {
@@ -195,7 +184,7 @@
 	}
 	_, err = v.DetectVcsFromFS(cwd)
 	if empty == false && err == v.ErrCannotDetectVCS {
-		msg.Warn("%s appears to be a vendored package. Unable to set new version. Consider the '--update-vendored' flag.\n", dep.Name)
+		return fmt.Errorf("Cache directory missing VCS information for %s", dep.Name)
 	} else {
 		repo, err := dep.GetRepo(cwd)
 		if err != nil {
@@ -261,215 +250,47 @@
 
 // VcsGet figures out how to fetch a dependency, and then gets it.
 //
-// VcsGet installs into the dest.
-func VcsGet(dep *cfg.Dependency, dest, home string, cache, cacheGopath, useGopath bool) error {
-	// When not skipping the $GOPATH look in it for a copy of the package
-	if useGopath {
-		// Check if the $GOPATH has a viable version to use and if so copy to vendor
-		gps := gpath.Gopaths()
-		for _, p := range gps {
-			d := filepath.Join(p, "src", dep.Name)
-			if _, err := os.Stat(d); err == nil {
-				empty, err := gpath.IsDirectoryEmpty(d)
-				if empty || err != nil {
-					continue
-				}
+// VcsGet installs into the cache.
+func VcsGet(dep *cfg.Dependency) error {
 
-				repo, err := dep.GetRepo(d)
-				if err != nil {
-					continue
-				}
-
-				// Dirty repos have uncommitted changes.
-				if repo.IsDirty() {
-					continue
-				}
-
-				// Having found a repo we copy it to vendor and update it.
-				msg.Info("Copying package %s from the GOPATH.", dep.Name)
-				msg.Debug("Found %s in GOPATH at %s. Copying to %s", dep.Name, d, dest)
-				err = gpath.CopyDir(d, dest)
-				if err != nil {
-					return err
-				}
-
-				// Update the repo in the vendor directory
-				msg.Debug("Updating %s, now in the vendor path at %s", dep.Name, dest)
-				repo, err = dep.GetRepo(dest)
-				if err != nil {
-					return err
-				}
-				err = repo.Update()
-				if err != nil {
-					return err
-				}
-
-				// If there is no reference set on the dep we try to checkout
-				// the default branch.
-				if dep.Reference == "" {
-					db := defaultBranch(repo, home)
-					if db != "" {
-						err = repo.UpdateVersion(db)
-						if err != nil && msg.Default.IsDebugging {
-							msg.Debug("Attempting to set the version on %s to %s failed. Error %s", dep.Name, db, err)
-						}
-					}
-				}
-				return nil
-			}
-		}
+	key, err := cp.Key(dep.Remote())
+	if err != nil {
+		msg.Die("Cache key generation error: %s", err)
 	}
+	location := cp.Location()
+	d := filepath.Join(location, "src", key)
 
-	// When opting in to cache in the GOPATH attempt to do put a copy there.
-	if cacheGopath {
-
-		// Since we didn't find an existing copy in the GOPATHs try to clone there.
-		gp := gpath.Gopath()
-		if gp != "" {
-			d := filepath.Join(gp, "src", dep.Name)
-			if _, err := os.Stat(d); os.IsNotExist(err) {
-				// Empty directory so we checkout out the code here.
-				msg.Debug("Retrieving %s to %s before copying to vendor", dep.Name, d)
-				repo, err := dep.GetRepo(d)
-				if err != nil {
-					return err
-				}
-				repo.Get()
-
-				branch := findCurrentBranch(repo)
-				if branch != "" {
-					// we know the default branch so we can store it in the cache
-					var loc string
-					if dep.Repository != "" {
-						loc = dep.Repository
-					} else {
-						loc = "https://" + dep.Name
-					}
-					key, err := cp.Key(loc)
-					if err == nil {
-						msg.Debug("Saving default branch for %s", repo.Remote())
-						c := cp.RepoInfo{DefaultBranch: branch}
-						err = cp.SaveRepoData(key, c)
-						if msg.Default.IsDebugging && err == cp.ErrCacheDisabled {
-							msg.Debug("Unable to cache default branch because caching is disabled")
-						}
-					}
-				}
-
-				msg.Debug("Copying %s from GOPATH at %s to %s", dep.Name, d, dest)
-				err = gpath.CopyDir(d, dest)
-				if err != nil {
-					return err
-				}
-
-				return nil
-			}
-		}
-	}
-
-	// If opting in to caching attempt to put it in the cache folder
-	if cache {
-		// Check if the cache has a viable version and try to use that.
-		var loc string
-		if dep.Repository != "" {
-			loc = dep.Repository
-		} else {
-			loc = "https://" + dep.Name
-		}
-		key, err := cp.Key(loc)
-		if err == nil {
-			location, err := cp.Location()
-			if err != nil {
-				return err
-			}
-			d := filepath.Join(location, "src", key)
-
-			repo, err := dep.GetRepo(d)
-			if err != nil {
-				return err
-			}
-			// If the directory does not exist this is a first cache.
-			if _, err = os.Stat(d); os.IsNotExist(err) {
-				msg.Debug("Adding %s to the cache for the first time", dep.Name)
-				err = repo.Get()
-				if err != nil {
-					return err
-				}
-				branch := findCurrentBranch(repo)
-				if branch != "" {
-					// we know the default branch so we can store it in the cache
-					var loc string
-					if dep.Repository != "" {
-						loc = dep.Repository
-					} else {
-						loc = "https://" + dep.Name
-					}
-					key, err := cp.Key(loc)
-					if err == nil {
-						msg.Debug("Saving default branch for %s", repo.Remote())
-						c := cp.RepoInfo{DefaultBranch: branch}
-						err = cp.SaveRepoData(key, c)
-						if err == cp.ErrCacheDisabled {
-							msg.Debug("Unable to cache default branch because caching is disabled")
-						} else if err != nil {
-							msg.Debug("Error saving %s to cache. Error: %s", repo.Remote(), err)
-						}
-					}
-				}
-
-			} else {
-				msg.Debug("Updating %s in the cache", dep.Name)
-				err = repo.Update()
-				if err != nil {
-					return err
-				}
-			}
-
-			msg.Debug("Copying %s from the cache to %s", dep.Name, dest)
-			err = gpath.CopyDir(d, dest)
-			if err != nil {
-				return err
-			}
-
-			return nil
-		}
-
-		msg.Warn("Cache key generation error: %s", err)
-	}
-
-	// If unable to cache pull directly into the vendor/ directory.
-	repo, err := dep.GetRepo(dest)
+	repo, err := dep.GetRepo(d)
 	if err != nil {
 		return err
 	}
-
-	gerr := repo.Get()
-
-	// Attempt to cache the default branch
-	if cache {
-		if branch := findCurrentBranch(repo); branch != "" {
-			// we know the default branch so we can store it in the cache
-			var loc string
-			if dep.Repository != "" {
-				loc = dep.Repository
-			} else {
-				loc = "https://" + dep.Name
+	// If the directory does not exist this is a first cache.
+	if _, err = os.Stat(d); os.IsNotExist(err) {
+		msg.Debug("Adding %s to the cache for the first time", dep.Name)
+		err = repo.Get()
+		if err != nil {
+			return err
+		}
+		branch := findCurrentBranch(repo)
+		if branch != "" {
+			msg.Debug("Saving default branch for %s", repo.Remote())
+			c := cp.RepoInfo{DefaultBranch: branch}
+			err = cp.SaveRepoData(key, c)
+			if err == cp.ErrCacheDisabled {
+				msg.Debug("Unable to cache default branch because caching is disabled")
+			} else if err != nil {
+				msg.Debug("Error saving %s to cache. Error: %s", repo.Remote(), err)
 			}
-			key, err := cp.Key(loc)
-			if err == nil {
-				msg.Debug("Saving default branch for %s", repo.Remote())
-				c := cp.RepoInfo{DefaultBranch: branch}
-				err = cp.SaveRepoData(key, c)
-				if err == cp.ErrCacheDisabled {
-					msg.Debug("Unable to cache default branch because caching is disabled")
-				} else if err != nil {
-					msg.Debug("Error saving %s to cache - Error: %s", repo.Remote(), err)
-				}
-			}
+		}
+	} else {
+		msg.Debug("Updating %s in the cache", dep.Name)
+		err = repo.Update()
+		if err != nil {
+			return err
 		}
 	}
 
-	return gerr
+	return nil
 }
 
 // filterArchOs indicates a dependency should be filtered out because it is
@@ -523,7 +344,7 @@
 // defaultBranch tries to ascertain the default branch for the given repo.
 // Some repos will have multiple branches in them (e.g. Git) while others
 // (e.g. Svn) will not.
-func defaultBranch(repo v.Repo, home string) string {
+func defaultBranch(repo v.Repo) string {
 
 	// Svn and Bzr use different locations (paths or entire locations)
 	// for branches so we won't have a default branch.
diff --git a/repo/vendored_cleanup.go b/repo/vendored_cleanup.go
deleted file mode 100644
index acbab91..0000000
--- a/repo/vendored_cleanup.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package repo
-
-import (
-	"os"
-	"path/filepath"
-
-	"github.com/Masterminds/glide/cfg"
-	"github.com/Masterminds/glide/msg"
-	gpath "github.com/Masterminds/glide/path"
-)
-
-// VendoredCleanup cleans up vendored codebases after an update.
-//
-// This should _only_ be run for installations that do not want VCS repos inside
-// of the vendor/ directory.
-func VendoredCleanup(conf *cfg.Config) error {
-	vend, err := gpath.Vendor()
-	if err != nil {
-		return err
-	}
-
-	for _, dep := range conf.Imports {
-		if dep.UpdateAsVendored == true {
-			msg.Info("Cleaning up vendored package %s\n", dep.Name)
-
-			// Remove the VCS directory
-			cwd := filepath.Join(vend, dep.Name)
-			repo, err := dep.GetRepo(cwd)
-			if err != nil {
-				msg.Err("Error cleaning up %s:%s", dep.Name, err)
-				continue
-			}
-			t := repo.Vcs()
-			err = os.RemoveAll(cwd + string(os.PathSeparator) + "." + string(t))
-			if err != nil {
-				msg.Err("Error cleaning up VCS dir for %s:%s", dep.Name, err)
-			}
-		}
-
-	}
-
-	return nil
-}
diff --git a/vendor/github.com/codegangsta/cli/.gitignore b/vendor/github.com/codegangsta/cli/.gitignore
new file mode 100644
index 0000000..faf70c4
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/.gitignore
@@ -0,0 +1,2 @@
+*.coverprofile
+node_modules/
diff --git a/vendor/github.com/codegangsta/cli/.travis.yml b/vendor/github.com/codegangsta/cli/.travis.yml
index c2b5c8d..273d017 100644
--- a/vendor/github.com/codegangsta/cli/.travis.yml
+++ b/vendor/github.com/codegangsta/cli/.travis.yml
@@ -1,18 +1,40 @@
 language: go
+
 sudo: false
 
+cache:
+  directories:
+  - node_modules
+
 go:
-- 1.1.2
 - 1.2.2
 - 1.3.3
-- 1.4.2
-- 1.5.1
-- tip
+- 1.4
+- 1.5.4
+- 1.6.2
+- master
 
 matrix:
   allow_failures:
-    - go: tip
+  - go: master
+  include:
+  - go: 1.6.2
+    os: osx
+  - go: 1.1.2
+    install: go get -v .
+    before_script: echo skipping gfmxr on $TRAVIS_GO_VERSION
+    script:
+    - ./runtests vet
+    - ./runtests test
+
+before_script:
+- go get github.com/urfave/gfmxr/...
+- if [ ! -f node_modules/.bin/markdown-toc ] ; then
+    npm install markdown-toc ;
+  fi
 
 script:
-- go vet ./...
-- go test -v ./...
+- ./runtests vet
+- ./runtests test
+- ./runtests gfmxr
+- ./runtests toc
diff --git a/vendor/github.com/codegangsta/cli/CHANGELOG.md b/vendor/github.com/codegangsta/cli/CHANGELOG.md
new file mode 100644
index 0000000..d1904fe
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/CHANGELOG.md
@@ -0,0 +1,329 @@
+# Change Log
+
+**ATTN**: This project uses [semantic versioning](http://semver.org/).
+
+## [Unreleased]
+
+## [1.18.0] - 2016-06-27
+### Added
+- `./runtests` test runner with coverage tracking by default
+- testing on OS X
+- testing on Windows
+- `UintFlag`, `Uint64Flag`, and `Int64Flag` types and supporting code
+
+### Changed
+- Use spaces for alignment in help/usage output instead of tabs, making the
+  output alignment consistent regardless of tab width
+
+### Fixed
+- Printing of command aliases in help text
+- Printing of visible flags for both struct and struct pointer flags
+- Display the `help` subcommand when using `CommandCategories`
+- No longer swallows `panic`s that occur within the `Action`s themselves when
+  detecting the signature of the `Action` field
+
+## [1.17.0] - 2016-05-09
+### Added
+- Pluggable flag-level help text rendering via `cli.DefaultFlagStringFunc`
+- `context.GlobalBoolT` was added as an analogue to `context.GlobalBool`
+- Support for hiding commands by setting `Hidden: true` -- this will hide the
+  commands in help output
+
+### Changed
+- `Float64Flag`, `IntFlag`, and `DurationFlag` default values are no longer
+  quoted in help text output.
+- All flag types now include `(default: {value})` strings following usage when a
+  default value can be (reasonably) detected.
+- `IntSliceFlag` and `StringSliceFlag` usage strings are now more consistent
+  with non-slice flag types
+- Apps now exit with a code of 3 if an unknown subcommand is specified
+  (previously they printed "No help topic for...", but still exited 0. This
+  makes it easier to script around apps built using `cli` since they can trust
+  that a 0 exit code indicated a successful execution.
+- cleanups based on [Go Report Card
+  feedback](https://goreportcard.com/report/github.com/urfave/cli)
+
+## [1.16.0] - 2016-05-02
+### Added
+- `Hidden` field on all flag struct types to omit from generated help text
+
+### Changed
+- `BashCompletionFlag` (`--enable-bash-completion`) is now omitted from
+generated help text via the `Hidden` field
+
+### Fixed
+- handling of error values in `HandleAction` and `HandleExitCoder`
+
+## [1.15.0] - 2016-04-30
+### Added
+- This file!
+- Support for placeholders in flag usage strings
+- `App.Metadata` map for arbitrary data/state management
+- `Set` and `GlobalSet` methods on `*cli.Context` for altering values after
+parsing.
+- Support for nested lookup of dot-delimited keys in structures loaded from
+YAML.
+
+### Changed
+- The `App.Action` and `Command.Action` now prefer a return signature of
+`func(*cli.Context) error`, as defined by `cli.ActionFunc`.  If a non-nil
+`error` is returned, there may be two outcomes:
+    - If the error fulfills `cli.ExitCoder`, then `os.Exit` will be called
+    automatically
+    - Else the error is bubbled up and returned from `App.Run`
+- Specifying an `Action` with the legacy return signature of
+`func(*cli.Context)` will produce a deprecation message to stderr
+- Specifying an `Action` that is not a `func` type will produce a non-zero exit
+from `App.Run`
+- Specifying an `Action` func that has an invalid (input) signature will
+produce a non-zero exit from `App.Run`
+
+### Deprecated
+- <a name="deprecated-cli-app-runandexitonerror"></a>
+`cli.App.RunAndExitOnError`, which should now be done by returning an error
+that fulfills `cli.ExitCoder` to `cli.App.Run`.
+- <a name="deprecated-cli-app-action-signature"></a> the legacy signature for
+`cli.App.Action` of `func(*cli.Context)`, which should now have a return
+signature of `func(*cli.Context) error`, as defined by `cli.ActionFunc`.
+
+### Fixed
+- Added missing `*cli.Context.GlobalFloat64` method
+
+## [1.14.0] - 2016-04-03 (backfilled 2016-04-25)
+### Added
+- Codebeat badge
+- Support for categorization via `CategorizedHelp` and `Categories` on app.
+
+### Changed
+- Use `filepath.Base` instead of `path.Base` in `Name` and `HelpName`.
+
+### Fixed
+- Ensure version is not shown in help text when `HideVersion` set.
+
+## [1.13.0] - 2016-03-06 (backfilled 2016-04-25)
+### Added
+- YAML file input support.
+- `NArg` method on context.
+
+## [1.12.0] - 2016-02-17 (backfilled 2016-04-25)
+### Added
+- Custom usage error handling.
+- Custom text support in `USAGE` section of help output.
+- Improved help messages for empty strings.
+- AppVeyor CI configuration.
+
+### Changed
+- Removed `panic` from default help printer func.
+- De-duping and optimizations.
+
+### Fixed
+- Correctly handle `Before`/`After` at command level when no subcommands.
+- Case of literal `-` argument causing flag reordering.
+- Environment variable hints on Windows.
+- Docs updates.
+
+## [1.11.1] - 2015-12-21 (backfilled 2016-04-25)
+### Changed
+- Use `path.Base` in `Name` and `HelpName`
+- Export `GetName` on flag types.
+
+### Fixed
+- Flag parsing when skipping is enabled.
+- Test output cleanup.
+- Move completion check to account for empty input case.
+
+## [1.11.0] - 2015-11-15 (backfilled 2016-04-25)
+### Added
+- Destination scan support for flags.
+- Testing against `tip` in Travis CI config.
+
+### Changed
+- Go version in Travis CI config.
+
+### Fixed
+- Removed redundant tests.
+- Use correct example naming in tests.
+
+## [1.10.2] - 2015-10-29 (backfilled 2016-04-25)
+### Fixed
+- Remove unused var in bash completion.
+
+## [1.10.1] - 2015-10-21 (backfilled 2016-04-25)
+### Added
+- Coverage and reference logos in README.
+
+### Fixed
+- Use specified values in help and version parsing.
+- Only display app version and help message once.
+
+## [1.10.0] - 2015-10-06 (backfilled 2016-04-25)
+### Added
+- More tests for existing functionality.
+- `ArgsUsage` at app and command level for help text flexibility.
+
+### Fixed
+- Honor `HideHelp` and `HideVersion` in `App.Run`.
+- Remove juvenile word from README.
+
+## [1.9.0] - 2015-09-08 (backfilled 2016-04-25)
+### Added
+- `FullName` on command with accompanying help output update.
+- Set default `$PROG` in bash completion.
+
+### Changed
+- Docs formatting.
+
+### Fixed
+- Removed self-referential imports in tests.
+
+## [1.8.0] - 2015-06-30 (backfilled 2016-04-25)
+### Added
+- Support for `Copyright` at app level.
+- `Parent` func at context level to walk up context lineage.
+
+### Fixed
+- Global flag processing at top level.
+
+## [1.7.1] - 2015-06-11 (backfilled 2016-04-25)
+### Added
+- Aggregate errors from `Before`/`After` funcs.
+- Doc comments on flag structs.
+- Include non-global flags when checking version and help.
+- Travis CI config updates.
+
+### Fixed
+- Ensure slice type flags have non-nil values.
+- Collect global flags from the full command hierarchy.
+- Docs prose.
+
+## [1.7.0] - 2015-05-03 (backfilled 2016-04-25)
+### Changed
+- `HelpPrinter` signature includes output writer.
+
+### Fixed
+- Specify go 1.1+ in docs.
+- Set `Writer` when running command as app.
+
+## [1.6.0] - 2015-03-23 (backfilled 2016-04-25)
+### Added
+- Multiple author support.
+- `NumFlags` at context level.
+- `Aliases` at command level.
+
+### Deprecated
+- `ShortName` at command level.
+
+### Fixed
+- Subcommand help output.
+- Backward compatible support for deprecated `Author` and `Email` fields.
+- Docs regarding `Names`/`Aliases`.
+
+## [1.5.0] - 2015-02-20 (backfilled 2016-04-25)
+### Added
+- `After` hook func support at app and command level.
+
+### Fixed
+- Use parsed context when running command as subcommand.
+- Docs prose.
+
+## [1.4.1] - 2015-01-09 (backfilled 2016-04-25)
+### Added
+- Support for hiding `-h / --help` flags, but not `help` subcommand.
+- Stop flag parsing after `--`.
+
+### Fixed
+- Help text for generic flags to specify single value.
+- Use double quotes in output for defaults.
+- Use `ParseInt` instead of `ParseUint` for int environment var values.
+- Use `0` as base when parsing int environment var values.
+
+## [1.4.0] - 2014-12-12 (backfilled 2016-04-25)
+### Added
+- Support for environment variable lookup "cascade".
+- Support for `Stdout` on app for output redirection.
+
+### Fixed
+- Print command help instead of app help in `ShowCommandHelp`.
+
+## [1.3.1] - 2014-11-13 (backfilled 2016-04-25)
+### Added
+- Docs and example code updates.
+
+### Changed
+- Default `-v / --version` flag made optional.
+
+## [1.3.0] - 2014-08-10 (backfilled 2016-04-25)
+### Added
+- `FlagNames` at context level.
+- Exposed `VersionPrinter` var for more control over version output.
+- Zsh completion hook.
+- `AUTHOR` section in default app help template.
+- Contribution guidelines.
+- `DurationFlag` type.
+
+## [1.2.0] - 2014-08-02
+### Added
+- Support for environment variable defaults on flags plus tests.
+
+## [1.1.0] - 2014-07-15
+### Added
+- Bash completion.
+- Optional hiding of built-in help command.
+- Optional skipping of flag parsing at command level.
+- `Author`, `Email`, and `Compiled` metadata on app.
+- `Before` hook func support at app and command level.
+- `CommandNotFound` func support at app level.
+- Command reference available on context.
+- `GenericFlag` type.
+- `Float64Flag` type.
+- `BoolTFlag` type.
+- `IsSet` flag helper on context.
+- More flag lookup funcs at context level.
+- More tests &amp; docs.
+
+### Changed
+- Help template updates to account for presence/absence of flags.
+- Separated subcommand help template.
+- Exposed `HelpPrinter` var for more control over help output.
+
+## [1.0.0] - 2013-11-01
+### Added
+- `help` flag in default app flag set and each command flag set.
+- Custom handling of argument parsing errors.
+- Command lookup by name at app level.
+- `StringSliceFlag` type and supporting `StringSlice` type.
+- `IntSliceFlag` type and supporting `IntSlice` type.
+- Slice type flag lookups by name at context level.
+- Export of app and command help functions.
+- More tests &amp; docs.
+
+## 0.1.0 - 2013-07-22
+### Added
+- Initial implementation.
+
+[Unreleased]: https://github.com/urfave/cli/compare/v1.18.0...HEAD
+[1.18.0]: https://github.com/urfave/cli/compare/v1.17.0...v1.18.0
+[1.17.0]: https://github.com/urfave/cli/compare/v1.16.0...v1.17.0
+[1.16.0]: https://github.com/urfave/cli/compare/v1.15.0...v1.16.0
+[1.15.0]: https://github.com/urfave/cli/compare/v1.14.0...v1.15.0
+[1.14.0]: https://github.com/urfave/cli/compare/v1.13.0...v1.14.0
+[1.13.0]: https://github.com/urfave/cli/compare/v1.12.0...v1.13.0
+[1.12.0]: https://github.com/urfave/cli/compare/v1.11.1...v1.12.0
+[1.11.1]: https://github.com/urfave/cli/compare/v1.11.0...v1.11.1
+[1.11.0]: https://github.com/urfave/cli/compare/v1.10.2...v1.11.0
+[1.10.2]: https://github.com/urfave/cli/compare/v1.10.1...v1.10.2
+[1.10.1]: https://github.com/urfave/cli/compare/v1.10.0...v1.10.1
+[1.10.0]: https://github.com/urfave/cli/compare/v1.9.0...v1.10.0
+[1.9.0]: https://github.com/urfave/cli/compare/v1.8.0...v1.9.0
+[1.8.0]: https://github.com/urfave/cli/compare/v1.7.1...v1.8.0
+[1.7.1]: https://github.com/urfave/cli/compare/v1.7.0...v1.7.1
+[1.7.0]: https://github.com/urfave/cli/compare/v1.6.0...v1.7.0
+[1.6.0]: https://github.com/urfave/cli/compare/v1.5.0...v1.6.0
+[1.5.0]: https://github.com/urfave/cli/compare/v1.4.1...v1.5.0
+[1.4.1]: https://github.com/urfave/cli/compare/v1.4.0...v1.4.1
+[1.4.0]: https://github.com/urfave/cli/compare/v1.3.1...v1.4.0
+[1.3.1]: https://github.com/urfave/cli/compare/v1.3.0...v1.3.1
+[1.3.0]: https://github.com/urfave/cli/compare/v1.2.0...v1.3.0
+[1.2.0]: https://github.com/urfave/cli/compare/v1.1.0...v1.2.0
+[1.1.0]: https://github.com/urfave/cli/compare/v1.0.0...v1.1.0
+[1.0.0]: https://github.com/urfave/cli/compare/v0.1.0...v1.0.0
diff --git a/vendor/github.com/codegangsta/cli/LICENSE b/vendor/github.com/codegangsta/cli/LICENSE
index 5515ccf..42a597e 100644
--- a/vendor/github.com/codegangsta/cli/LICENSE
+++ b/vendor/github.com/codegangsta/cli/LICENSE
@@ -1,21 +1,21 @@
-Copyright (C) 2013 Jeremy Saenz
-All Rights Reserved.
+MIT License
 
-MIT LICENSE
+Copyright (c) 2016 Jeremy Saenz & Contributors
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/vendor/github.com/codegangsta/cli/README.md b/vendor/github.com/codegangsta/cli/README.md
index d9371cf..ebb1d74 100644
--- a/vendor/github.com/codegangsta/cli/README.md
+++ b/vendor/github.com/codegangsta/cli/README.md
@@ -1,42 +1,145 @@
-[![Coverage](http://gocover.io/_badge/github.com/codegangsta/cli?0)](http://gocover.io/github.com/codegangsta/cli)
-[![Build Status](https://travis-ci.org/codegangsta/cli.svg?branch=master)](https://travis-ci.org/codegangsta/cli)
-[![GoDoc](https://godoc.org/github.com/codegangsta/cli?status.svg)](https://godoc.org/github.com/codegangsta/cli)
-[![codebeat](https://codebeat.co/badges/0a8f30aa-f975-404b-b878-5fab3ae1cc5f)](https://codebeat.co/projects/github-com-codegangsta-cli)
+cli
+===
 
-# cli.go
+[![Build Status](https://travis-ci.org/urfave/cli.svg?branch=master)](https://travis-ci.org/urfave/cli)
+[![Windows Build Status](https://ci.appveyor.com/api/projects/status/rtgk5xufi932pb2v?svg=true)](https://ci.appveyor.com/project/urfave/cli)
+[![GoDoc](https://godoc.org/github.com/urfave/cli?status.svg)](https://godoc.org/github.com/urfave/cli)
+[![codebeat](https://codebeat.co/badges/0a8f30aa-f975-404b-b878-5fab3ae1cc5f)](https://codebeat.co/projects/github-com-urfave-cli)
+[![Go Report Card](https://goreportcard.com/badge/urfave/cli)](https://goreportcard.com/report/urfave/cli)
+[![top level coverage](https://gocover.io/_badge/github.com/urfave/cli?0 "top level coverage")](http://gocover.io/github.com/urfave/cli) /
+[![altsrc coverage](https://gocover.io/_badge/github.com/urfave/cli/altsrc?0 "altsrc coverage")](http://gocover.io/github.com/urfave/cli/altsrc)
 
-`cli.go` is simple, fast, and fun package for building command line apps in Go. The goal is to enable developers to write fast and distributable command line applications in an expressive way.
+**Notice:** This is the library formerly known as
+`github.com/codegangsta/cli` -- Github will automatically redirect requests
+to this repository, but we recommend updating your references for clarity.
+
+cli is a simple, fast, and fun package for building command line apps in Go. The
+goal is to enable developers to write fast and distributable command line
+applications in an expressive way.
+
+<!-- toc -->
+
+- [Overview](#overview)
+- [Installation](#installation)
+  * [Supported platforms](#supported-platforms)
+  * [Using the `v2` branch](#using-the-v2-branch)
+  * [Pinning to the `v1` branch](#pinning-to-the-v1-branch)
+- [Getting Started](#getting-started)
+- [Examples](#examples)
+  * [Arguments](#arguments)
+  * [Flags](#flags)
+    + [Placeholder Values](#placeholder-values)
+    + [Alternate Names](#alternate-names)
+    + [Values from the Environment](#values-from-the-environment)
+    + [Values from alternate input sources (YAML and others)](#values-from-alternate-input-sources-yaml-and-others)
+  * [Subcommands](#subcommands)
+  * [Subcommands categories](#subcommands-categories)
+  * [Exit code](#exit-code)
+  * [Bash Completion](#bash-completion)
+    + [Enabling](#enabling)
+    + [Distribution](#distribution)
+    + [Customization](#customization)
+  * [Generated Help Text](#generated-help-text)
+    + [Customization](#customization-1)
+  * [Version Flag](#version-flag)
+    + [Customization](#customization-2)
+    + [Full API Example](#full-api-example)
+- [Contribution Guidelines](#contribution-guidelines)
+
+<!-- tocstop -->
 
 ## Overview
 
-Command line apps are usually so tiny that there is absolutely no reason why your code should *not* be self-documenting. Things like generating help text and parsing command flags/options should not hinder productivity when writing a command line app.
+Command line apps are usually so tiny that there is absolutely no reason why
+your code should *not* be self-documenting. Things like generating help text and
+parsing command flags/options should not hinder productivity when writing a
+command line app.
 
-**This is where `cli.go` comes into play.** `cli.go` makes command line programming fun, organized, and expressive!
+**This is where cli comes into play.** cli makes command line programming fun,
+organized, and expressive!
 
 ## Installation
 
-Make sure you have a working Go environment (go 1.1+ is *required*). [See the install instructions](http://golang.org/doc/install.html).
+Make sure you have a working Go environment.  Go version 1.1+ is required for
+core cli, whereas use of the [`./altsrc`](./altsrc) input extensions requires Go
+version 1.2+. [See the install
+instructions](http://golang.org/doc/install.html).
 
-To install `cli.go`, simply run:
+To install cli, simply run:
 ```
-$ go get github.com/codegangsta/cli
+$ go get github.com/urfave/cli
 ```
 
-Make sure your `PATH` includes to the `$GOPATH/bin` directory so your commands can be easily used:
+Make sure your `PATH` includes to the `$GOPATH/bin` directory so your commands
+can be easily used:
 ```
 export PATH=$PATH:$GOPATH/bin
 ```
 
+### Supported platforms
+
+cli is tested against multiple versions of Go on Linux, and against the latest
+released version of Go on OS X and Windows.  For full details, see
+[`./.travis.yml`](./.travis.yml) and [`./appveyor.yml`](./appveyor.yml).
+
+### Using the `v2` branch
+
+**Warning**: The `v2` branch is currently unreleased and considered unstable.
+
+There is currently a long-lived branch named `v2` that is intended to land as
+the new `master` branch once development there has settled down.  The current
+`master` branch (mirrored as `v1`) is being manually merged into `v2` on
+an irregular human-based schedule, but generally if one wants to "upgrade" to
+`v2` *now* and accept the volatility (read: "awesomeness") that comes along with
+that, please use whatever version pinning of your preference, such as via
+`gopkg.in`:
+
+```
+$ go get gopkg.in/urfave/cli.v2
+```
+
+``` go
+...
+import (
+  "gopkg.in/urfave/cli.v2" // imports as package "cli"
+)
+...
+```
+
+### Pinning to the `v1` branch
+
+Similarly to the section above describing use of the `v2` branch, if one wants
+to avoid any unexpected compatibility pains once `v2` becomes `master`, then
+pinning to the `v1` branch is an acceptable option, e.g.:
+
+```
+$ go get gopkg.in/urfave/cli.v1
+```
+
+``` go
+...
+import (
+  "gopkg.in/urfave/cli.v1" // imports as package "cli"
+)
+...
+```
+
 ## Getting Started
 
-One of the philosophies behind `cli.go` is that an API should be playful and full of discovery. So a `cli.go` app can be as little as one line of code in `main()`.
+One of the philosophies behind cli is that an API should be playful and full of
+discovery. So a cli app can be as little as one line of code in `main()`.
 
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "A new cli application"
+} -->
 ``` go
 package main
 
 import (
   "os"
-  "github.com/codegangsta/cli"
+
+  "github.com/urfave/cli"
 )
 
 func main() {
@@ -44,50 +147,67 @@
 }
 ```
 
-This app will run and show help text, but is not very useful. Let's give an action to execute and some help documentation:
+This app will run and show help text, but is not very useful. Let's give an
+action to execute and some help documentation:
 
+<!-- {
+  "output": "boom! I say!"
+} -->
 ``` go
 package main
 
 import (
+  "fmt"
   "os"
-  "github.com/codegangsta/cli"
+
+  "github.com/urfave/cli"
 )
 
 func main() {
   app := cli.NewApp()
   app.Name = "boom"
   app.Usage = "make an explosive entrance"
-  app.Action = func(c *cli.Context) {
-    println("boom! I say!")
+  app.Action = func(c *cli.Context) error {
+    fmt.Println("boom! I say!")
+    return nil
   }
 
   app.Run(os.Args)
 }
 ```
 
-Running this already gives you a ton of functionality, plus support for things like subcommands and flags, which are covered below.
+Running this already gives you a ton of functionality, plus support for things
+like subcommands and flags, which are covered below.
 
-## Example
+## Examples
 
-Being a programmer can be a lonely job. Thankfully by the power of automation that is not the case! Let's create a greeter app to fend off our demons of loneliness!
+Being a programmer can be a lonely job. Thankfully by the power of automation
+that is not the case! Let's create a greeter app to fend off our demons of
+loneliness!
 
-Start by creating a directory named `greet`, and within it, add a file, `greet.go` with the following code in it:
+Start by creating a directory named `greet`, and within it, add a file,
+`greet.go` with the following code in it:
 
+<!-- {
+  "output": "Hello friend!"
+} -->
 ``` go
 package main
 
 import (
+  "fmt"
   "os"
-  "github.com/codegangsta/cli"
+
+  "github.com/urfave/cli"
 )
 
 func main() {
   app := cli.NewApp()
   app.Name = "greet"
   app.Usage = "fight the loneliness!"
-  app.Action = func(c *cli.Context) {
-    println("Hello friend!")
+  app.Action = func(c *cli.Context) error {
+    fmt.Println("Hello friend!")
+    return nil
   }
 
   app.Run(os.Args)
@@ -107,7 +227,7 @@
 Hello friend!
 ```
 
-`cli.go` also generates neat help text:
+cli also generates neat help text:
 
 ```
 $ greet help
@@ -124,209 +244,410 @@
     help, h  Shows a list of commands or help for one command
 
 GLOBAL OPTIONS
-    --version	Shows version information
+    --version Shows version information
 ```
 
 ### Arguments
 
-You can lookup arguments by calling the `Args` function on `cli.Context`.
+You can lookup arguments by calling the `Args` function on `cli.Context`, e.g.:
 
+<!-- {
+  "output": "Hello \""
+} -->
 ``` go
-...
-app.Action = func(c *cli.Context) {
-  println("Hello", c.Args()[0])
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Action = func(c *cli.Context) error {
+    fmt.Printf("Hello %q", c.Args().Get(0))
+    return nil
+  }
+
+  app.Run(os.Args)
 }
-...
 ```
 
 ### Flags
 
 Setting and querying flags is simple.
 
+<!-- {
+  "output": "Hello Nefertiti"
+} -->
 ``` go
-...
-app.Flags = []cli.Flag {
-  cli.StringFlag{
-    Name: "lang",
-    Value: "english",
-    Usage: "language for the greeting",
-  },
-}
-app.Action = func(c *cli.Context) {
-  name := "someone"
-  if c.NArg() > 0 {
-    name = c.Args()[0]
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang",
+      Value: "english",
+      Usage: "language for the greeting",
+    },
   }
-  if c.String("lang") == "spanish" {
-    println("Hola", name)
-  } else {
-    println("Hello", name)
+
+  app.Action = func(c *cli.Context) error {
+    name := "Nefertiti"
+    if c.NArg() > 0 {
+      name = c.Args().Get(0)
+    }
+    if c.String("lang") == "spanish" {
+      fmt.Println("Hola", name)
+    } else {
+      fmt.Println("Hello", name)
+    }
+    return nil
   }
+
+  app.Run(os.Args)
 }
-...
 ```
 
-You can also set a destination variable for a flag, to which the content will be scanned.
+You can also set a destination variable for a flag, to which the content will be
+scanned.
 
+<!-- {
+  "output": "Hello someone"
+} -->
 ``` go
-...
-var language string
-app.Flags = []cli.Flag {
-  cli.StringFlag{
-    Name:        "lang",
-    Value:       "english",
-    Usage:       "language for the greeting",
-    Destination: &language,
-  },
-}
-app.Action = func(c *cli.Context) {
-  name := "someone"
-  if c.NArg() > 0 {
-    name = c.Args()[0]
+package main
+
+import (
+  "os"
+  "fmt"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  var language string
+
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name:        "lang",
+      Value:       "english",
+      Usage:       "language for the greeting",
+      Destination: &language,
+    },
   }
-  if language == "spanish" {
-    println("Hola", name)
-  } else {
-    println("Hello", name)
+
+  app.Action = func(c *cli.Context) error {
+    name := "someone"
+    if c.NArg() > 0 {
+      name = c.Args()[0]
+    }
+    if language == "spanish" {
+      fmt.Println("Hola", name)
+    } else {
+      fmt.Println("Hello", name)
+    }
+    return nil
   }
+
+  app.Run(os.Args)
 }
-...
 ```
 
-See full list of flags at http://godoc.org/github.com/codegangsta/cli
+See full list of flags at http://godoc.org/github.com/urfave/cli
+
+#### Placeholder Values
+
+Sometimes it's useful to specify a flag's value within the usage string itself.
+Such placeholders are indicated with back quotes.
+
+For example this:
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "&#45;&#45;config FILE, &#45;c FILE"
+} -->
+```go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag{
+    cli.StringFlag{
+      Name:  "config, c",
+      Usage: "Load configuration from `FILE`",
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+Will result in help output like:
+
+```
+--config FILE, -c FILE   Load configuration from FILE
+```
+
+Note that only the first placeholder is used. Subsequent back-quoted words will
+be left as-is.
 
 #### Alternate Names
 
-You can set alternate (or short) names for flags by providing a comma-delimited list for the `Name`. e.g.
+You can set alternate (or short) names for flags by providing a comma-delimited
+list for the `Name`. e.g.
 
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "&#45;&#45;lang value, &#45;l value.*language for the greeting.*default: \"english\""
+} -->
 ``` go
-app.Flags = []cli.Flag {
-  cli.StringFlag{
-    Name: "lang, l",
-    Value: "english",
-    Usage: "language for the greeting",
-  },
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "language for the greeting",
+    },
+  }
+
+  app.Run(os.Args)
 }
 ```
 
-That flag can then be set with `--lang spanish` or `-l spanish`. Note that giving two different forms of the same flag in the same command invocation is an error.
+That flag can then be set with `--lang spanish` or `-l spanish`. Note that
+giving two different forms of the same flag in the same command invocation is an
+error.
 
 #### Values from the Environment
 
 You can also have the default value set from the environment via `EnvVar`.  e.g.
 
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "language for the greeting.*APP_LANG"
+} -->
 ``` go
-app.Flags = []cli.Flag {
-  cli.StringFlag{
-    Name: "lang, l",
-    Value: "english",
-    Usage: "language for the greeting",
-    EnvVar: "APP_LANG",
-  },
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "language for the greeting",
+      EnvVar: "APP_LANG",
+    },
+  }
+
+  app.Run(os.Args)
 }
 ```
 
-The `EnvVar` may also be given as a comma-delimited "cascade", where the first environment variable that resolves is used as the default.
+The `EnvVar` may also be given as a comma-delimited "cascade", where the first
+environment variable that resolves is used as the default.
 
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "language for the greeting.*LEGACY_COMPAT_LANG.*APP_LANG.*LANG"
+} -->
 ``` go
-app.Flags = []cli.Flag {
-  cli.StringFlag{
-    Name: "lang, l",
-    Value: "english",
-    Usage: "language for the greeting",
-    EnvVar: "LEGACY_COMPAT_LANG,APP_LANG,LANG",
-  },
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "language for the greeting",
+      EnvVar: "LEGACY_COMPAT_LANG,APP_LANG,LANG",
+    },
+  }
+
+  app.Run(os.Args)
 }
 ```
 
 #### Values from alternate input sources (YAML and others)
 
-There is a separate package altsrc that adds support for getting flag values from other input sources like YAML.
+There is a separate package altsrc that adds support for getting flag values
+from other input sources like YAML.
 
-In order to get values for a flag from an alternate input source the following code would be added to wrap an existing cli.Flag like below:
+In order to get values for a flag from an alternate input source the following
+code would be added to wrap an existing cli.Flag like below:
 
 ``` go
   altsrc.NewIntFlag(cli.IntFlag{Name: "test"})
 ```
 
-Initialization must also occur for these flags. Below is an example initializing getting data from a yaml file below.
+Initialization must also occur for these flags. Below is an example initializing
+getting data from a yaml file below.
 
 ``` go
   command.Before = altsrc.InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
 ```
 
-The code above will use the "load" string as a flag name to get the file name of a yaml file from the cli.Context. 
-It will then use that file name to initialize the yaml input source for any flags that are defined on that command. 
-As a note the "load" flag used would also have to be defined on the command flags in order for this code snipped to work.
+The code above will use the "load" string as a flag name to get the file name of
+a yaml file from the cli.Context.  It will then use that file name to initialize
+the yaml input source for any flags that are defined on that command.  As a note
+the "load" flag used would also have to be defined on the command flags in order
+for this code snipped to work.
 
-Currently only YAML files are supported but developers can add support for other input sources by implementing the
-altsrc.InputSourceContext for their given sources.
+Currently only YAML files are supported but developers can add support for other
+input sources by implementing the altsrc.InputSourceContext for their given
+sources.
 
 Here is a more complete sample of a command using YAML support:
 
+<!-- {
+  "args": ["test-cmd", "&#45;&#45;help"],
+  "output": "&#45&#45;test value.*default: 0"
+} -->
 ``` go
-	command := &cli.Command{
-		Name:        "test-cmd",
-		Aliases:     []string{"tc"},
-		Usage:       "this is for testing",
-		Description: "testing",
-		Action: func(c *cli.Context) {
-			// Action to run
-		},
-		Flags: []cli.Flag{
-			NewIntFlag(cli.IntFlag{Name: "test"}),
-			cli.StringFlag{Name: "load"}},
-	}
-	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
-	err := command.Run(c)
+package notmain
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+  "github.com/urfave/cli/altsrc"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  flags := []cli.Flag{
+    altsrc.NewIntFlag(cli.IntFlag{Name: "test"}),
+    cli.StringFlag{Name: "load"},
+  }
+
+  app.Action = func(c *cli.Context) error {
+    fmt.Println("yaml ist rad")
+    return nil
+  }
+
+  app.Before = altsrc.InitInputSourceWithContext(flags, altsrc.NewYamlSourceFromFlagFunc("load"))
+  app.Flags = flags
+
+  app.Run(os.Args)
+}
 ```
 
 ### Subcommands
 
 Subcommands can be defined for a more git-like command line app.
 
+<!-- {
+  "args": ["template", "add"],
+  "output": "new task template: .+"
+} -->
 ```go
-...
-app.Commands = []cli.Command{
-  {
-    Name:      "add",
-    Aliases:     []string{"a"},
-    Usage:     "add a task to the list",
-    Action: func(c *cli.Context) {
-      println("added task: ", c.Args().First())
-    },
-  },
-  {
-    Name:      "complete",
-    Aliases:     []string{"c"},
-    Usage:     "complete a task on the list",
-    Action: func(c *cli.Context) {
-      println("completed task: ", c.Args().First())
-    },
-  },
-  {
-    Name:      "template",
-    Aliases:     []string{"r"},
-    Usage:     "options for task templates",
-    Subcommands: []cli.Command{
-      {
-        Name:  "add",
-        Usage: "add a new template",
-        Action: func(c *cli.Context) {
-            println("new task template: ", c.Args().First())
-        },
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Commands = []cli.Command{
+    {
+      Name:    "add",
+      Aliases: []string{"a"},
+      Usage:   "add a task to the list",
+      Action:  func(c *cli.Context) error {
+        fmt.Println("added task: ", c.Args().First())
+        return nil
       },
-      {
-        Name:  "remove",
-        Usage: "remove an existing template",
-        Action: func(c *cli.Context) {
-          println("removed task template: ", c.Args().First())
+    },
+    {
+      Name:    "complete",
+      Aliases: []string{"c"},
+      Usage:   "complete a task on the list",
+      Action:  func(c *cli.Context) error {
+        fmt.Println("completed task: ", c.Args().First())
+        return nil
+      },
+    },
+    {
+      Name:        "template",
+      Aliases:     []string{"t"},
+      Usage:       "options for task templates",
+      Subcommands: []cli.Command{
+        {
+          Name:  "add",
+          Usage: "add a new template",
+          Action: func(c *cli.Context) error {
+            fmt.Println("new task template: ", c.Args().First())
+            return nil
+          },
+        },
+        {
+          Name:  "remove",
+          Usage: "remove an existing template",
+          Action: func(c *cli.Context) error {
+            fmt.Println("removed task template: ", c.Args().First())
+            return nil
+          },
         },
       },
     },
-  },
+  }
+
+  app.Run(os.Args)
 }
-...
 ```
 
 ### Subcommands categories
@@ -338,34 +659,79 @@
 E.g.
 
 ```go
-...
-	app.Commands = []cli.Command{
-		{
-			Name: "noop",
-		},
-		{
-			Name:     "add",
-			Category: "template",
-		},
-		{
-			Name:     "remove",
-			Category: "template",
-		},
-	}
-...
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Commands = []cli.Command{
+    {
+      Name: "noop",
+    },
+    {
+      Name:     "add",
+      Category: "template",
+    },
+    {
+      Name:     "remove",
+      Category: "template",
+    },
+  }
+
+  app.Run(os.Args)
+}
 ```
 
 Will include:
 
 ```
-...
 COMMANDS:
     noop
 
   Template actions:
     add
     remove
-...
+```
+
+### Exit code
+
+Calling `App.Run` will not automatically call `os.Exit`, which means that by
+default the exit code will "fall through" to being `0`.  An explicit exit code
+may be set by returning a non-nil error that fulfills `cli.ExitCoder`, *or* a
+`cli.MultiError` that includes an error that fulfills `cli.ExitCoder`, e.g.:
+
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.Flags = []cli.Flag{
+    cli.BoolTFlag{
+      Name:  "ginger-crouton",
+      Usage: "is it in the soup?",
+    },
+  }
+  app.Action = func(ctx *cli.Context) error {
+    if !ctx.Bool("ginger-crouton") {
+      return cli.NewExitError("it is not in the soup", 86)
+    }
+    return nil
+  }
+
+  app.Run(os.Args)
+}
 ```
 
 ### Bash Completion
@@ -375,41 +741,58 @@
 show an app's subcommands, but you can write your own completion methods for
 the App or its subcommands.
 
-```go
-...
-var tasks = []string{"cook", "clean", "laundry", "eat", "sleep", "code"}
-app := cli.NewApp()
-app.EnableBashCompletion = true
-app.Commands = []cli.Command{
-  {
-    Name:  "complete",
-    Aliases: []string{"c"},
-    Usage: "complete a task on the list",
-    Action: func(c *cli.Context) {
-       println("completed task: ", c.Args().First())
-    },
-    BashComplete: func(c *cli.Context) {
-      // This will complete if no args are passed
-      if c.NArg() > 0 {
-        return
-      }
-      for _, t := range tasks {
-        fmt.Println(t)
-      }
+<!-- {
+  "args": ["complete", "&#45;&#45;generate&#45;bash&#45;completion"],
+  "output": "laundry"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  tasks := []string{"cook", "clean", "laundry", "eat", "sleep", "code"}
+
+  app := cli.NewApp()
+  app.EnableBashCompletion = true
+  app.Commands = []cli.Command{
+    {
+      Name:  "complete",
+      Aliases: []string{"c"},
+      Usage: "complete a task on the list",
+      Action: func(c *cli.Context) error {
+         fmt.Println("completed task: ", c.Args().First())
+         return nil
+      },
+      BashComplete: func(c *cli.Context) {
+        // This will complete if no args are passed
+        if c.NArg() > 0 {
+          return
+        }
+        for _, t := range tasks {
+          fmt.Println(t)
+        }
+      },
     },
   }
+
+  app.Run(os.Args)
 }
-...
 ```
 
-#### To Enable
+#### Enabling
 
 Source the `autocomplete/bash_autocomplete` file in your `.bashrc` file while
 setting the `PROG` variable to the name of your program:
 
 `PROG=myprogram source /.../cli/autocomplete/bash_autocomplete`
 
-#### To Distribute
+#### Distribution
 
 Copy `autocomplete/bash_autocomplete` into `/etc/bash_completion.d/` and rename
 it to the name of the program you wish to add autocomplete support for (or
@@ -425,10 +808,502 @@
 `autocomplete/bash_autocomplete` in their bash configuration with `$PROG` set
 to the name of their program (as above).
 
+#### Customization
+
+The default bash completion flag (`--generate-bash-completion`) is defined as
+`cli.BashCompletionFlag`, and may be redefined if desired, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45;compgen"],
+  "output": "wat\nhelp\nh"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.BashCompletionFlag = cli.BoolFlag{
+    Name:   "compgen",
+    Hidden: true,
+  }
+
+  app := cli.NewApp()
+  app.EnableBashCompletion = true
+  app.Commands = []cli.Command{
+    {
+      Name: "wat",
+    },
+  }
+  app.Run(os.Args)
+}
+```
+
+### Generated Help Text
+
+The default help flag (`-h/--help`) is defined as `cli.HelpFlag` and is checked 
+by the cli internals in order to print generated help text for the app, command,
+or subcommand, and break execution.
+
+#### Customization
+
+All of the help text generation may be customized, and at multiple levels.  The
+templates are exposed as variables `AppHelpTemplate`, `CommandHelpTemplate`, and
+`SubcommandHelpTemplate` which may be reassigned or augmented, and full override
+is possible by assigning a compatible func to the `cli.HelpPrinter` variable,
+e.g.:
+
+<!-- {
+  "output": "Ha HA.  I pwnd the help!!1"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "io"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  // EXAMPLE: Append to an existing template
+  cli.AppHelpTemplate = fmt.Sprintf(`%s
+
+WEBSITE: http://awesometown.example.com
+
+SUPPORT: support@awesometown.example.com
+
+`, cli.AppHelpTemplate)
+
+  // EXAMPLE: Override a template
+  cli.AppHelpTemplate = `NAME:
+   {{.Name}} - {{.Usage}}
+USAGE:
+   {{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command
+[command options]{{end}} {{if
+.ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
+   {{if len .Authors}}
+AUTHOR(S):
+   {{range .Authors}}{{ . }}{{end}}
+   {{end}}{{if .Commands}}
+COMMANDS:
+{{range .Commands}}{{if not .HideHelp}}   {{join .Names ", "}}{{ "\t"
+}}{{.Usage}}{{ "\n" }}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+GLOBAL OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}{{if .Copyright }}
+COPYRIGHT:
+   {{.Copyright}}
+   {{end}}{{if .Version}}
+VERSION:
+   {{.Version}}
+   {{end}}
+`
+
+  // EXAMPLE: Replace the `HelpPrinter` func
+  cli.HelpPrinter = func(w io.Writer, templ string, data interface{}) {
+    fmt.Println("Ha HA.  I pwnd the help!!1")
+  }
+
+  cli.NewApp().Run(os.Args)
+}
+```
+
+The default flag may be customized to something other than `-h/--help` by
+setting `cli.HelpFlag`, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45halp"],
+  "output": "haaaaalp.*HALP"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.HelpFlag = cli.BoolFlag{
+    Name: "halp, haaaaalp",
+    Usage: "HALP",
+    EnvVar: "SHOW_HALP,HALPPLZ",
+  }
+
+  cli.NewApp().Run(os.Args)
+}
+```
+
+### Version Flag
+
+The default version flag (`-v/--version`) is defined as `cli.VersionFlag`, which
+is checked by the cli internals in order to print the `App.Version` via
+`cli.VersionPrinter` and break execution.
+
+#### Customization
+
+The default flag may be cusomized to something other than `-v/--version` by
+setting `cli.VersionFlag`, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45print-version"],
+  "output": "partay version v19\\.99\\.0"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.VersionFlag = cli.BoolFlag{
+    Name: "print-version, V",
+    Usage: "print only the version",
+  }
+
+  app := cli.NewApp()
+  app.Name = "partay"
+  app.Version = "v19.99.0"
+  app.Run(os.Args)
+}
+```
+
+Alternatively, the version printer at `cli.VersionPrinter` may be overridden, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45version"],
+  "output": "version=v19\\.99\\.0 revision=fafafaf"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+var (
+  Revision = "fafafaf"
+)
+
+func main() {
+  cli.VersionPrinter = func(c *cli.Context) {
+    fmt.Printf("version=%s revision=%s\n", c.App.Version, Revision)
+  }
+
+  app := cli.NewApp()
+  app.Name = "partay"
+  app.Version = "v19.99.0"
+  app.Run(os.Args)
+}
+```
+
+#### Full API Example
+
+**Notice**: This is a contrived (functioning) example meant strictly for API
+demonstration purposes.  Use of one's imagination is encouraged.
+
+<!-- {
+  "output": "made it!\nPhew!"
+} -->
+``` go
+package main
+
+import (
+  "errors"
+  "flag"
+  "fmt"
+  "io"
+  "io/ioutil"
+  "os"
+  "time"
+
+  "github.com/urfave/cli"
+)
+
+func init() {
+  cli.AppHelpTemplate += "\nCUSTOMIZED: you bet ur muffins\n"
+  cli.CommandHelpTemplate += "\nYMMV\n"
+  cli.SubcommandHelpTemplate += "\nor something\n"
+
+  cli.HelpFlag = cli.BoolFlag{Name: "halp"}
+  cli.BashCompletionFlag = cli.BoolFlag{Name: "compgen", Hidden: true}
+  cli.VersionFlag = cli.BoolFlag{Name: "print-version, V"}
+
+  cli.HelpPrinter = func(w io.Writer, templ string, data interface{}) {
+    fmt.Fprintf(w, "best of luck to you\n")
+  }
+  cli.VersionPrinter = func(c *cli.Context) {
+    fmt.Fprintf(c.App.Writer, "version=%s\n", c.App.Version)
+  }
+  cli.OsExiter = func(c int) {
+    fmt.Fprintf(cli.ErrWriter, "refusing to exit %d\n", c)
+  }
+  cli.ErrWriter = ioutil.Discard
+  cli.FlagStringer = func(fl cli.Flag) string {
+    return fmt.Sprintf("\t\t%s", fl.GetName())
+  }
+}
+
+type hexWriter struct{}
+
+func (w *hexWriter) Write(p []byte) (int, error) {
+  for _, b := range p {
+    fmt.Printf("%x", b)
+  }
+  fmt.Printf("\n")
+
+  return len(p), nil
+}
+
+type genericType struct{
+  s string
+}
+
+func (g *genericType) Set(value string) error {
+  g.s = value
+  return nil
+}
+
+func (g *genericType) String() string {
+  return g.s
+}
+
+func main() {
+  app := cli.NewApp()
+  app.Name = "kənˈtrīv"
+  app.Version = "v19.99.0"
+  app.Compiled = time.Now()
+  app.Authors = []cli.Author{
+    cli.Author{
+      Name:  "Example Human",
+      Email: "human@example.com",
+    },
+  }
+  app.Copyright = "(c) 1999 Serious Enterprise"
+  app.HelpName = "contrive"
+  app.Usage = "demonstrate available API"
+  app.UsageText = "contrive - demonstrating the available API"
+  app.ArgsUsage = "[args and such]"
+  app.Commands = []cli.Command{
+    cli.Command{
+      Name:        "doo",
+      Aliases:     []string{"do"},
+      Category:    "motion",
+      Usage:       "do the doo",
+      UsageText:   "doo - does the dooing",
+      Description: "no really, there is a lot of dooing to be done",
+      ArgsUsage:   "[arrgh]",
+      Flags: []cli.Flag{
+        cli.BoolFlag{Name: "forever, forevvarr"},
+      },
+      Subcommands: cli.Commands{
+        cli.Command{
+          Name:   "wop",
+          Action: wopAction,
+        },
+      },
+      SkipFlagParsing: false,
+      HideHelp:        false,
+      Hidden:          false,
+      HelpName:        "doo!",
+      BashComplete: func(c *cli.Context) {
+        fmt.Fprintf(c.App.Writer, "--better\n")
+      },
+      Before: func(c *cli.Context) error {
+        fmt.Fprintf(c.App.Writer, "brace for impact\n")
+        return nil
+      },
+      After: func(c *cli.Context) error {
+        fmt.Fprintf(c.App.Writer, "did we lose anyone?\n")
+        return nil
+      },
+      Action: func(c *cli.Context) error {
+        c.Command.FullName()
+        c.Command.HasName("wop")
+        c.Command.Names()
+        c.Command.VisibleFlags()
+        fmt.Fprintf(c.App.Writer, "dodododododoodododddooooododododooo\n")
+        if c.Bool("forever") {
+          c.Command.Run(c)
+        }
+        return nil
+      },
+      OnUsageError: func(c *cli.Context, err error, isSubcommand bool) error {
+        fmt.Fprintf(c.App.Writer, "for shame\n")
+        return err
+      },
+    },
+  }
+  app.Flags = []cli.Flag{
+    cli.BoolFlag{Name: "fancy"},
+    cli.BoolTFlag{Name: "fancier"},
+    cli.DurationFlag{Name: "howlong, H", Value: time.Second * 3},
+    cli.Float64Flag{Name: "howmuch"},
+    cli.GenericFlag{Name: "wat", Value: &genericType{}},
+    cli.Int64Flag{Name: "longdistance"},
+    cli.Int64SliceFlag{Name: "intervals"},
+    cli.IntFlag{Name: "distance"},
+    cli.IntSliceFlag{Name: "times"},
+    cli.StringFlag{Name: "dance-move, d"},
+    cli.StringSliceFlag{Name: "names, N"},
+    cli.UintFlag{Name: "age"},
+    cli.Uint64Flag{Name: "bigage"},
+  }
+  app.EnableBashCompletion = true
+  app.HideHelp = false
+  app.HideVersion = false
+  app.BashComplete = func(c *cli.Context) {
+    fmt.Fprintf(c.App.Writer, "lipstick\nkiss\nme\nlipstick\nringo\n")
+  }
+  app.Before = func(c *cli.Context) error {
+    fmt.Fprintf(c.App.Writer, "HEEEERE GOES\n")
+    return nil
+  }
+  app.After = func(c *cli.Context) error {
+    fmt.Fprintf(c.App.Writer, "Phew!\n")
+    return nil
+  }
+  app.CommandNotFound = func(c *cli.Context, command string) {
+    fmt.Fprintf(c.App.Writer, "Thar be no %q here.\n", command)
+  }
+  app.OnUsageError = func(c *cli.Context, err error, isSubcommand bool) error {
+    if isSubcommand {
+      return err
+    }
+
+    fmt.Fprintf(c.App.Writer, "WRONG: %#v\n", err)
+    return nil
+  }
+  app.Action = func(c *cli.Context) error {
+    cli.DefaultAppComplete(c)
+    cli.HandleExitCoder(errors.New("not an exit coder, though"))
+    cli.ShowAppHelp(c)
+    cli.ShowCommandCompletions(c, "nope")
+    cli.ShowCommandHelp(c, "also-nope")
+    cli.ShowCompletions(c)
+    cli.ShowSubcommandHelp(c)
+    cli.ShowVersion(c)
+
+    categories := c.App.Categories()
+    categories.AddCommand("sounds", cli.Command{
+      Name: "bloop",
+    })
+
+    for _, category := range c.App.Categories() {
+      fmt.Fprintf(c.App.Writer, "%s\n", category.Name)
+      fmt.Fprintf(c.App.Writer, "%#v\n", category.Commands)
+      fmt.Fprintf(c.App.Writer, "%#v\n", category.VisibleCommands())
+    }
+
+    fmt.Printf("%#v\n", c.App.Command("doo"))
+    if c.Bool("infinite") {
+      c.App.Run([]string{"app", "doo", "wop"})
+    }
+
+    if c.Bool("forevar") {
+      c.App.RunAsSubcommand(c)
+    }
+    c.App.Setup()
+    fmt.Printf("%#v\n", c.App.VisibleCategories())
+    fmt.Printf("%#v\n", c.App.VisibleCommands())
+    fmt.Printf("%#v\n", c.App.VisibleFlags())
+
+    fmt.Printf("%#v\n", c.Args().First())
+    if len(c.Args()) > 0 {
+      fmt.Printf("%#v\n", c.Args()[1])
+    }
+    fmt.Printf("%#v\n", c.Args().Present())
+    fmt.Printf("%#v\n", c.Args().Tail())
+
+    set := flag.NewFlagSet("contrive", 0)
+    nc := cli.NewContext(c.App, set, c)
+
+    fmt.Printf("%#v\n", nc.Args())
+    fmt.Printf("%#v\n", nc.Bool("nope"))
+    fmt.Printf("%#v\n", nc.BoolT("nerp"))
+    fmt.Printf("%#v\n", nc.Duration("howlong"))
+    fmt.Printf("%#v\n", nc.Float64("hay"))
+    fmt.Printf("%#v\n", nc.Generic("bloop"))
+    fmt.Printf("%#v\n", nc.Int64("bonk"))
+    fmt.Printf("%#v\n", nc.Int64Slice("burnks"))
+    fmt.Printf("%#v\n", nc.Int("bips"))
+    fmt.Printf("%#v\n", nc.IntSlice("blups"))
+    fmt.Printf("%#v\n", nc.String("snurt"))
+    fmt.Printf("%#v\n", nc.StringSlice("snurkles"))
+    fmt.Printf("%#v\n", nc.Uint("flub"))
+    fmt.Printf("%#v\n", nc.Uint64("florb"))
+    fmt.Printf("%#v\n", nc.GlobalBool("global-nope"))
+    fmt.Printf("%#v\n", nc.GlobalBoolT("global-nerp"))
+    fmt.Printf("%#v\n", nc.GlobalDuration("global-howlong"))
+    fmt.Printf("%#v\n", nc.GlobalFloat64("global-hay"))
+    fmt.Printf("%#v\n", nc.GlobalGeneric("global-bloop"))
+    fmt.Printf("%#v\n", nc.GlobalInt("global-bips"))
+    fmt.Printf("%#v\n", nc.GlobalIntSlice("global-blups"))
+    fmt.Printf("%#v\n", nc.GlobalString("global-snurt"))
+    fmt.Printf("%#v\n", nc.GlobalStringSlice("global-snurkles"))
+
+    fmt.Printf("%#v\n", nc.FlagNames())
+    fmt.Printf("%#v\n", nc.GlobalFlagNames())
+    fmt.Printf("%#v\n", nc.GlobalIsSet("wat"))
+    fmt.Printf("%#v\n", nc.GlobalSet("wat", "nope"))
+    fmt.Printf("%#v\n", nc.NArg())
+    fmt.Printf("%#v\n", nc.NumFlags())
+    fmt.Printf("%#v\n", nc.Parent())
+
+    nc.Set("wat", "also-nope")
+
+    ec := cli.NewExitError("ohwell", 86)
+    fmt.Fprintf(c.App.Writer, "%d", ec.ExitCode())
+    fmt.Printf("made it!\n")
+    return ec
+  }
+
+  if os.Getenv("HEXY") != "" {
+    app.Writer = &hexWriter{}
+    app.ErrWriter = &hexWriter{}
+  }
+
+  app.Metadata = map[string]interface{}{
+    "layers":     "many",
+    "explicable": false,
+    "whatever-values": 19.99,
+  }
+
+  app.Run(os.Args)
+}
+
+func wopAction(c *cli.Context) error {
+  fmt.Fprintf(c.App.Writer, ":wave: over here, eh\n")
+  return nil
+}
+```
+
 ## Contribution Guidelines
 
-Feel free to put up a pull request to fix a bug or maybe add a feature. I will give it a code review and make sure that it does not break backwards compatibility. If I or any other collaborators agree that it is in line with the vision of the project, we will work with you to get the code into a mergeable state and merge it into the master branch.
+Feel free to put up a pull request to fix a bug or maybe add a feature. I will
+give it a code review and make sure that it does not break backwards
+compatibility. If I or any other collaborators agree that it is in line with
+the vision of the project, we will work with you to get the code into
+a mergeable state and merge it into the master branch.
 
-If you have contributed something significant to the project, I will most likely add you as a collaborator. As a collaborator you are given the ability to merge others pull requests. It is very important that new code does not break existing code, so be careful about what code you do choose to merge. If you have any questions feel free to link @codegangsta to the issue in question and we can review it together.
+If you have contributed something significant to the project, we will most
+likely add you as a collaborator. As a collaborator you are given the ability
+to merge others pull requests. It is very important that new code does not
+break existing code, so be careful about what code you do choose to merge.
 
-If you feel like you have contributed to the project but have not yet been added as a collaborator, I probably forgot to add you. Hit @codegangsta up over email and we will get it figured out.
+If you feel like you have contributed to the project but have not yet been
+added as a collaborator, we probably forgot to add you, please open an issue.
diff --git a/vendor/github.com/codegangsta/cli/altsrc/flag.go b/vendor/github.com/codegangsta/cli/altsrc/flag.go
index f13ffb4..3e44d02 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/flag.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/flag.go
@@ -7,7 +7,7 @@
 	"strconv"
 	"strings"
 
-	"github.com/codegangsta/cli"
+	"github.com/urfave/cli"
 )
 
 // FlagInputSourceExtension is an extension interface of cli.Flag that
@@ -38,7 +38,7 @@
 // InitInputSource is used to to setup an InputSourceContext on a cli.Command Before method. It will create a new
 // input source based on the func provided. If there is no error it will then apply the new input source to any flags
 // that are supported by the input source
-func InitInputSource(flags []cli.Flag, createInputSource func() (InputSourceContext, error)) func(context *cli.Context) error {
+func InitInputSource(flags []cli.Flag, createInputSource func() (InputSourceContext, error)) cli.BeforeFunc {
 	return func(context *cli.Context) error {
 		inputSource, err := createInputSource()
 		if err != nil {
@@ -52,7 +52,7 @@
 // InitInputSourceWithContext is used to to setup an InputSourceContext on a cli.Command Before method. It will create a new
 // input source based on the func provided with potentially using existing cli.Context values to initialize itself. If there is
 // no error it will then apply the new input source to any flags that are supported by the input source
-func InitInputSourceWithContext(flags []cli.Flag, createInputSource func(context *cli.Context) (InputSourceContext, error)) func(context *cli.Context) error {
+func InitInputSourceWithContext(flags []cli.Flag, createInputSource func(context *cli.Context) (InputSourceContext, error)) cli.BeforeFunc {
 	return func(context *cli.Context) error {
 		inputSource, err := createInputSource(context)
 		if err != nil {
diff --git a/vendor/github.com/codegangsta/cli/altsrc/flag_test.go b/vendor/github.com/codegangsta/cli/altsrc/flag_test.go
index ac4d1f5..218e9b8 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/flag_test.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/flag_test.go
@@ -8,7 +8,7 @@
 	"testing"
 	"time"
 
-	"github.com/codegangsta/cli"
+	"github.com/urfave/cli"
 )
 
 type testApplyInputSource struct {
@@ -296,7 +296,7 @@
 }
 
 func runTest(t *testing.T, test testApplyInputSource) *cli.Context {
-	inputSource := &MapInputSource{valueMap: map[string]interface{}{test.FlagName: test.MapValue}}
+	inputSource := &MapInputSource{valueMap: map[interface{}]interface{}{test.FlagName: test.MapValue}}
 	set := flag.NewFlagSet(test.FlagSetName, flag.ContinueOnError)
 	c := cli.NewContext(nil, set, nil)
 	if test.EnvVarName != "" && test.EnvVarValue != "" {
diff --git a/vendor/github.com/codegangsta/cli/altsrc/input_source_context.go b/vendor/github.com/codegangsta/cli/altsrc/input_source_context.go
index 6d695ff..8ea7e92 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/input_source_context.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/input_source_context.go
@@ -3,7 +3,7 @@
 import (
 	"time"
 
-	"github.com/codegangsta/cli"
+	"github.com/urfave/cli"
 )
 
 // InputSourceContext is an interface used to allow
diff --git a/vendor/github.com/codegangsta/cli/altsrc/map_input_source.go b/vendor/github.com/codegangsta/cli/altsrc/map_input_source.go
index f1670fb..b1c8e4f 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/map_input_source.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/map_input_source.go
@@ -3,15 +3,40 @@
 import (
 	"fmt"
 	"reflect"
+	"strings"
 	"time"
 
-	"github.com/codegangsta/cli"
+	"github.com/urfave/cli"
 )
 
 // MapInputSource implements InputSourceContext to return
 // data from the map that is loaded.
 type MapInputSource struct {
-	valueMap map[string]interface{}
+	valueMap map[interface{}]interface{}
+}
+
+// nestedVal checks if the name has '.' delimiters.
+// If so, it tries to traverse the tree by the '.' delimited sections to find
+// a nested value for the key.
+func nestedVal(name string, tree map[interface{}]interface{}) (interface{}, bool) {
+	if sections := strings.Split(name, "."); len(sections) > 1 {
+		node := tree
+		for _, section := range sections[:len(sections)-1] {
+			if child, ok := node[section]; !ok {
+				return nil, false
+			} else {
+				if ctype, ok := child.(map[interface{}]interface{}); !ok {
+					return nil, false
+				} else {
+					node = ctype
+				}
+			}
+		}
+		if val, ok := node[sections[len(sections)-1]]; ok {
+			return val, true
+		}
+	}
+	return nil, false
 }
 
 // Int returns an int from the map if it exists otherwise returns 0
@@ -22,7 +47,14 @@
 		if !isType {
 			return 0, incorrectTypeForFlagError(name, "int", otherGenericValue)
 		}
-
+		return otherValue, nil
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(int)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "int", nestedGenericValue)
+		}
 		return otherValue, nil
 	}
 
@@ -39,6 +71,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(time.Duration)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "duration", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return 0, nil
 }
@@ -53,6 +93,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(float64)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "float64", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return 0, nil
 }
@@ -67,6 +115,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(string)
+		if !isType {
+			return "", incorrectTypeForFlagError(name, "string", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return "", nil
 }
@@ -81,6 +137,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.([]string)
+		if !isType {
+			return nil, incorrectTypeForFlagError(name, "[]string", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return nil, nil
 }
@@ -95,6 +159,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.([]int)
+		if !isType {
+			return nil, incorrectTypeForFlagError(name, "[]int", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return nil, nil
 }
@@ -109,6 +181,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(cli.Generic)
+		if !isType {
+			return nil, incorrectTypeForFlagError(name, "cli.Generic", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return nil, nil
 }
@@ -123,6 +203,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(bool)
+		if !isType {
+			return false, incorrectTypeForFlagError(name, "bool", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return false, nil
 }
@@ -137,6 +225,14 @@
 		}
 		return otherValue, nil
 	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(bool)
+		if !isType {
+			return true, incorrectTypeForFlagError(name, "bool", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
 
 	return true, nil
 }
diff --git a/vendor/github.com/codegangsta/cli/altsrc/yaml_command_test.go b/vendor/github.com/codegangsta/cli/altsrc/yaml_command_test.go
index 275bc64..31f78ce 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/yaml_command_test.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/yaml_command_test.go
@@ -11,7 +11,7 @@
 	"os"
 	"testing"
 
-	"github.com/codegangsta/cli"
+	"github.com/urfave/cli"
 )
 
 func TestCommandYamlFileTest(t *testing.T) {
@@ -29,9 +29,10 @@
 		Aliases:     []string{"tc"},
 		Usage:       "this is for testing",
 		Description: "testing",
-		Action: func(c *cli.Context) {
+		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 15)
+			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(cli.IntFlag{Name: "test"}),
@@ -61,9 +62,10 @@
 		Aliases:     []string{"tc"},
 		Usage:       "this is for testing",
 		Description: "testing",
-		Action: func(c *cli.Context) {
+		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 10)
+			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(cli.IntFlag{Name: "test", EnvVar: "THE_TEST"}),
@@ -76,6 +78,41 @@
 	expect(t, err, nil)
 }
 
+func TestCommandYamlFileTestGlobalEnvVarWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "top.test", EnvVar: "THE_TEST"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
 func TestCommandYamlFileTestSpecifiedFlagWins(t *testing.T) {
 	app := cli.NewApp()
 	set := flag.NewFlagSet("test", 0)
@@ -92,9 +129,10 @@
 		Aliases:     []string{"tc"},
 		Usage:       "this is for testing",
 		Description: "testing",
-		Action: func(c *cli.Context) {
+		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 7)
+			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(cli.IntFlag{Name: "test"}),
@@ -107,6 +145,39 @@
 	expect(t, err, nil)
 }
 
+func TestCommandYamlFileTestSpecifiedFlagWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	test := []string{"test-cmd", "--load", "current.yaml", "--top.test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "top.test"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
 func TestCommandYamlFileTestDefaultValueFileWins(t *testing.T) {
 	app := cli.NewApp()
 	set := flag.NewFlagSet("test", 0)
@@ -123,9 +194,10 @@
 		Aliases:     []string{"tc"},
 		Usage:       "this is for testing",
 		Description: "testing",
-		Action: func(c *cli.Context) {
+		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 15)
+			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(cli.IntFlag{Name: "test", Value: 7}),
@@ -138,6 +210,39 @@
 	expect(t, err, nil)
 }
 
+func TestCommandYamlFileTestDefaultValueFileWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "top.test", Value: 7}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
 func TestCommandYamlFileFlagHasDefaultGlobalEnvYamlSetGlobalEnvWins(t *testing.T) {
 	app := cli.NewApp()
 	set := flag.NewFlagSet("test", 0)
@@ -157,9 +262,10 @@
 		Aliases:     []string{"tc"},
 		Usage:       "this is for testing",
 		Description: "testing",
-		Action: func(c *cli.Context) {
+		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 11)
+			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(cli.IntFlag{Name: "test", Value: 7, EnvVar: "THE_TEST"}),
@@ -170,3 +276,38 @@
 
 	expect(t, err, nil)
 }
+
+func TestCommandYamlFileFlagHasDefaultGlobalEnvYamlSetGlobalEnvWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "top.test", Value: 7, EnvVar: "THE_TEST"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
diff --git a/vendor/github.com/codegangsta/cli/altsrc/yaml_file_loader.go b/vendor/github.com/codegangsta/cli/altsrc/yaml_file_loader.go
index 4fb0965..b4e3365 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/yaml_file_loader.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/yaml_file_loader.go
@@ -12,7 +12,7 @@
 	"net/url"
 	"os"
 
-	"github.com/codegangsta/cli"
+	"github.com/urfave/cli"
 
 	"gopkg.in/yaml.v2"
 )
@@ -24,7 +24,7 @@
 // NewYamlSourceFromFile creates a new Yaml InputSourceContext from a filepath.
 func NewYamlSourceFromFile(file string) (InputSourceContext, error) {
 	ysc := &yamlSourceContext{FilePath: file}
-	var results map[string]interface{}
+	var results map[interface{}]interface{}
 	err := readCommandYaml(ysc.FilePath, &results)
 	if err != nil {
 		return nil, fmt.Errorf("Unable to load Yaml file '%s': inner error: \n'%v'", ysc.FilePath, err.Error())
diff --git a/vendor/github.com/codegangsta/cli/app.go b/vendor/github.com/codegangsta/cli/app.go
index bd20a2d..a046c01 100644
--- a/vendor/github.com/codegangsta/cli/app.go
+++ b/vendor/github.com/codegangsta/cli/app.go
@@ -6,10 +6,27 @@
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"reflect"
 	"sort"
+	"strings"
 	"time"
 )
 
+var (
+	changeLogURL                    = "https://github.com/urfave/cli/blob/master/CHANGELOG.md"
+	appActionDeprecationURL         = fmt.Sprintf("%s#deprecated-cli-app-action-signature", changeLogURL)
+	runAndExitOnErrorDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-runandexitonerror", changeLogURL)
+
+	contactSysadmin = "This is an error in the application.  Please contact the distributor of this application if this is not you."
+
+	errNonFuncAction = NewExitError("ERROR invalid Action type.  "+
+		fmt.Sprintf("Must be a func of type `cli.ActionFunc`.  %s", contactSysadmin)+
+		fmt.Sprintf("See %s", appActionDeprecationURL), 2)
+	errInvalidActionSignature = NewExitError("ERROR invalid Action signature.  "+
+		fmt.Sprintf("Must be `cli.ActionFunc`.  %s", contactSysadmin)+
+		fmt.Sprintf("See %s", appActionDeprecationURL), 2)
+)
+
 // App is the main structure of a cli application. It is recommended that
 // an app be created with the cli.NewApp() function
 type App struct {
@@ -35,24 +52,25 @@
 	HideHelp bool
 	// Boolean to hide built-in version flag and the VERSION section of help
 	HideVersion bool
-	// Populate on app startup, only gettable throught method Categories()
+	// Populate on app startup, only gettable through method Categories()
 	categories CommandCategories
 	// An action to execute when the bash-completion flag is set
-	BashComplete func(context *Context)
+	BashComplete BashCompleteFunc
 	// An action to execute before any subcommands are run, but after the context is ready
 	// If a non-nil error is returned, no subcommands are run
-	Before func(context *Context) error
+	Before BeforeFunc
 	// An action to execute after any subcommands are run, but after the subcommand has finished
 	// It is run even if Action() panics
-	After func(context *Context) error
+	After AfterFunc
 	// The action to execute when no subcommands are specified
-	Action func(context *Context)
+	Action interface{}
+	// TODO: replace `Action: interface{}` with `Action: ActionFunc` once some kind
+	// of deprecation period has passed, maybe?
+
 	// Execute this function if the proper command cannot be found
-	CommandNotFound func(context *Context, command string)
-	// Execute this function, if an usage error occurs. This is useful for displaying customized usage error messages.
-	// This function is able to replace the original error messages.
-	// If this function is not set, the "Incorrect usage" is displayed and the execution is interrupted.
-	OnUsageError func(context *Context, err error, isSubcommand bool) error
+	CommandNotFound CommandNotFoundFunc
+	// Execute this function if an usage error occurs
+	OnUsageError OnUsageErrorFunc
 	// Compilation date
 	Compiled time.Time
 	// List of all authors who contributed
@@ -65,6 +83,12 @@
 	Email string
 	// Writer writer to write output to
 	Writer io.Writer
+	// ErrWriter writes error output
+	ErrWriter io.Writer
+	// Other custom info
+	Metadata map[string]interface{}
+
+	didSetup bool
 }
 
 // Tries to find out when this binary was compiled.
@@ -77,7 +101,8 @@
 	return info.ModTime()
 }
 
-// Creates a new cli Application with some reasonable defaults for Name, Usage, Version and Action.
+// NewApp creates a new cli Application with some reasonable defaults for Name,
+// Usage, Version and Action.
 func NewApp() *App {
 	return &App{
 		Name:         filepath.Base(os.Args[0]),
@@ -92,8 +117,16 @@
 	}
 }
 
-// Entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination
-func (a *App) Run(arguments []string) (err error) {
+// Setup runs initialization code to ensure all data structures are ready for
+// `Run` or inspection prior to `Run`.  It is internally called by `Run`, but
+// will return early if setup has already happened.
+func (a *App) Setup() {
+	if a.didSetup {
+		return
+	}
+
+	a.didSetup = true
+
 	if a.Author != "" || a.Email != "" {
 		a.Authors = append(a.Authors, Author{Name: a.Author, Email: a.Email})
 	}
@@ -107,13 +140,6 @@
 	}
 	a.Commands = newCmds
 
-	a.categories = CommandCategories{}
-	for _, command := range a.Commands {
-		a.categories = a.categories.AddCommand(command.Category, command)
-	}
-	sort.Sort(a.categories)
-
-	// append help to commands
 	if a.Command(helpCommand.Name) == nil && !a.HideHelp {
 		a.Commands = append(a.Commands, helpCommand)
 		if (HelpFlag != BoolFlag{}) {
@@ -121,7 +147,6 @@
 		}
 	}
 
-	//append version/help flags
 	if a.EnableBashCompletion {
 		a.appendFlag(BashCompletionFlag)
 	}
@@ -130,6 +155,18 @@
 		a.appendFlag(VersionFlag)
 	}
 
+	a.categories = CommandCategories{}
+	for _, command := range a.Commands {
+		a.categories = a.categories.AddCommand(command.Category, command)
+	}
+	sort.Sort(a.categories)
+}
+
+// Run is the entry point to the cli app. Parses the arguments slice and routes
+// to the proper flag/args combination
+func (a *App) Run(arguments []string) (err error) {
+	a.Setup()
+
 	// parse flags
 	set := flagSet(a.Name, a.Flags)
 	set.SetOutput(ioutil.Discard)
@@ -149,12 +186,12 @@
 	if err != nil {
 		if a.OnUsageError != nil {
 			err := a.OnUsageError(context, err, false)
-			return err
-		} else {
-			fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
-			ShowAppHelp(context)
+			HandleExitCoder(err)
 			return err
 		}
+		fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
+		ShowAppHelp(context)
+		return err
 	}
 
 	if !a.HideHelp && checkHelp(context) {
@@ -180,10 +217,12 @@
 	}
 
 	if a.Before != nil {
-		err = a.Before(context)
-		if err != nil {
-			fmt.Fprintf(a.Writer, "%v\n\n", err)
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			fmt.Fprintf(a.Writer, "%v\n\n", beforeErr)
 			ShowAppHelp(context)
+			HandleExitCoder(beforeErr)
+			err = beforeErr
 			return err
 		}
 	}
@@ -198,19 +237,25 @@
 	}
 
 	// Run default Action
-	a.Action(context)
-	return nil
+	err = HandleAction(a.Action, context)
+
+	HandleExitCoder(err)
+	return err
 }
 
-// Another entry point to the cli app, takes care of passing arguments and error handling
+// DEPRECATED: Another entry point to the cli app, takes care of passing arguments and error handling
 func (a *App) RunAndExitOnError() {
+	fmt.Fprintf(a.errWriter(),
+		"DEPRECATED cli.App.RunAndExitOnError.  %s  See %s\n",
+		contactSysadmin, runAndExitOnErrorDeprecationURL)
 	if err := a.Run(os.Args); err != nil {
-		fmt.Fprintln(os.Stderr, err)
-		os.Exit(1)
+		fmt.Fprintln(a.errWriter(), err)
+		OsExiter(1)
 	}
 }
 
-// Invokes the subcommand given the context, parses ctx.Args() to generate command-specific flags
+// RunAsSubcommand invokes the subcommand given the context, parses ctx.Args() to
+// generate command-specific flags
 func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	// append help to commands
 	if len(a.Commands) > 0 {
@@ -261,12 +306,12 @@
 	if err != nil {
 		if a.OnUsageError != nil {
 			err = a.OnUsageError(context, err, true)
-			return err
-		} else {
-			fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
-			ShowSubcommandHelp(context)
+			HandleExitCoder(err)
 			return err
 		}
+		fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
+		ShowSubcommandHelp(context)
+		return err
 	}
 
 	if len(a.Commands) > 0 {
@@ -283,6 +328,7 @@
 		defer func() {
 			afterErr := a.After(context)
 			if afterErr != nil {
+				HandleExitCoder(err)
 				if err != nil {
 					err = NewMultiError(err, afterErr)
 				} else {
@@ -293,8 +339,10 @@
 	}
 
 	if a.Before != nil {
-		err := a.Before(context)
-		if err != nil {
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			HandleExitCoder(beforeErr)
+			err = beforeErr
 			return err
 		}
 	}
@@ -309,12 +357,13 @@
 	}
 
 	// Run default Action
-	a.Action(context)
+	err = HandleAction(a.Action, context)
 
-	return nil
+	HandleExitCoder(err)
+	return err
 }
 
-// Returns the named command on App. Returns nil if the command does not exist
+// Command returns the named command on App. Returns nil if the command does not exist
 func (a *App) Command(name string) *Command {
 	for _, c := range a.Commands {
 		if c.HasName(name) {
@@ -325,11 +374,46 @@
 	return nil
 }
 
-// Returnes the array containing all the categories with the commands they contain
+// Categories returns a slice containing all the categories with the commands they contain
 func (a *App) Categories() CommandCategories {
 	return a.categories
 }
 
+// VisibleCategories returns a slice of categories and commands that are
+// Hidden=false
+func (a *App) VisibleCategories() []*CommandCategory {
+	ret := []*CommandCategory{}
+	for _, category := range a.categories {
+		if visible := func() *CommandCategory {
+			for _, command := range category.Commands {
+				if !command.Hidden {
+					return category
+				}
+			}
+			return nil
+		}(); visible != nil {
+			ret = append(ret, visible)
+		}
+	}
+	return ret
+}
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (a *App) VisibleCommands() []Command {
+	ret := []Command{}
+	for _, command := range a.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
+
+// VisibleFlags returns a slice of the Flags with Hidden=false
+func (a *App) VisibleFlags() []Flag {
+	return visibleFlags(a.Flags)
+}
+
 func (a *App) hasFlag(flag Flag) bool {
 	for _, f := range a.Flags {
 		if flag == f {
@@ -340,6 +424,16 @@
 	return false
 }
 
+func (a *App) errWriter() io.Writer {
+
+	// When the app ErrWriter is nil use the package level one.
+	if a.ErrWriter == nil {
+		return ErrWriter
+	}
+
+	return a.ErrWriter
+}
+
 func (a *App) appendFlag(flag Flag) {
 	if !a.hasFlag(flag) {
 		a.Flags = append(a.Flags, flag)
@@ -361,3 +455,45 @@
 
 	return fmt.Sprintf("%v %v", a.Name, e)
 }
+
+// HandleAction uses ✧✧✧reflection✧✧✧ to figure out if the given Action is an
+// ActionFunc, a func with the legacy signature for Action, or some other
+// invalid thing.  If it's an ActionFunc or a func with the legacy signature for
+// Action, the func is run!
+func HandleAction(action interface{}, context *Context) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			// Try to detect a known reflection error from *this scope*, rather than
+			// swallowing all panics that may happen when calling an Action func.
+			s := fmt.Sprintf("%v", r)
+			if strings.HasPrefix(s, "reflect: ") && strings.Contains(s, "too many input arguments") {
+				err = NewExitError(fmt.Sprintf("ERROR unknown Action error: %v.  See %s", r, appActionDeprecationURL), 2)
+			} else {
+				panic(r)
+			}
+		}
+	}()
+
+	if reflect.TypeOf(action).Kind() != reflect.Func {
+		return errNonFuncAction
+	}
+
+	vals := reflect.ValueOf(action).Call([]reflect.Value{reflect.ValueOf(context)})
+
+	if len(vals) == 0 {
+		fmt.Fprintf(ErrWriter,
+			"DEPRECATED Action signature.  Must be `cli.ActionFunc`.  %s  See %s\n",
+			contactSysadmin, appActionDeprecationURL)
+		return nil
+	}
+
+	if len(vals) > 1 {
+		return errInvalidActionSignature
+	}
+
+	if retErr, ok := vals[0].Interface().(error); vals[0].IsValid() && ok {
+		return retErr
+	}
+
+	return err
+}
diff --git a/vendor/github.com/codegangsta/cli/app_test.go b/vendor/github.com/codegangsta/cli/app_test.go
index ebf26c7..9c6b960 100644
--- a/vendor/github.com/codegangsta/cli/app_test.go
+++ b/vendor/github.com/codegangsta/cli/app_test.go
@@ -13,6 +13,10 @@
 	"testing"
 )
 
+type opCounts struct {
+	Total, BashComplete, OnUsageError, Before, CommandNotFound, Action, After, SubCommand int
+}
+
 func ExampleApp_Run() {
 	// set args for examples sake
 	os.Args = []string{"greet", "--name", "Jeremy"}
@@ -22,13 +26,14 @@
 	app.Flags = []Flag{
 		StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
 	}
-	app.Action = func(c *Context) {
+	app.Action = func(c *Context) error {
 		fmt.Printf("Hello %v\n", c.String("name"))
+		return nil
 	}
 	app.UsageText = "app [first_arg] [second_arg]"
 	app.Author = "Harrison"
 	app.Email = "harrison@lolwut.com"
-	app.Authors = []Author{Author{Name: "Oliver Allen", Email: "oliver@toyshop.com"}}
+	app.Authors = []Author{{Name: "Oliver Allen", Email: "oliver@toyshop.com"}}
 	app.Run(os.Args)
 	// Output:
 	// Hello Jeremy
@@ -58,8 +63,9 @@
 							Usage: "Name of the person to greet",
 						},
 					},
-					Action: func(c *Context) {
+					Action: func(c *Context) error {
 						fmt.Println("Hello,", c.String("name"))
+						return nil
 					},
 				},
 			},
@@ -86,8 +92,9 @@
 			Aliases:     []string{"d"},
 			Usage:       "use it to see a description",
 			Description: "This is how we describe describeit the function",
-			Action: func(c *Context) {
+			Action: func(c *Context) error {
 				fmt.Printf("i like to describe things")
+				return nil
 			},
 		},
 	}
@@ -116,15 +123,17 @@
 			Aliases:     []string{"d"},
 			Usage:       "use it to see a description",
 			Description: "This is how we describe describeit the function",
-			Action: func(c *Context) {
+			Action: func(c *Context) error {
 				fmt.Printf("i like to describe things")
+				return nil
 			},
 		}, {
 			Name:        "next",
 			Usage:       "next example",
 			Description: "more stuff to see when generating bash completion",
-			Action: func(c *Context) {
+			Action: func(c *Context) error {
 				fmt.Printf("the next example")
+				return nil
 			},
 		},
 	}
@@ -142,8 +151,9 @@
 	s := ""
 
 	app := NewApp()
-	app.Action = func(c *Context) {
+	app.Action = func(c *Context) error {
 		s = s + c.Args().First()
+		return nil
 	}
 
 	err := app.Run([]string{"command", "foo"})
@@ -188,9 +198,10 @@
 		Flags: []Flag{
 			StringFlag{Name: "option", Value: "", Usage: "some option"},
 		},
-		Action: func(c *Context) {
+		Action: func(c *Context) error {
 			parsedOption = c.String("option")
 			firstArg = c.Args().First()
+			return nil
 		},
 	}
 	app.Commands = []Command{command}
@@ -208,8 +219,9 @@
 	a.Commands = []Command{
 		{
 			Name: "foo",
-			Action: func(c *Context) {
+			Action: func(c *Context) error {
 				context = c
+				return nil
 			},
 			Flags: []Flag{
 				StringFlag{
@@ -237,9 +249,10 @@
 		Flags: []Flag{
 			StringFlag{Name: "option", Value: "", Usage: "some option"},
 		},
-		Action: func(c *Context) {
+		Action: func(c *Context) error {
 			parsedOption = c.String("option")
 			args = c.Args()
+			return nil
 		},
 	}
 	app.Commands = []Command{command}
@@ -258,8 +271,9 @@
 	app := NewApp()
 	command := Command{
 		Name: "cmd",
-		Action: func(c *Context) {
+		Action: func(c *Context) error {
 			args = c.Args()
+			return nil
 		},
 	}
 	app.Commands = []Command{command}
@@ -276,8 +290,9 @@
 	app := NewApp()
 	command := Command{
 		Name: "cmd",
-		Action: func(c *Context) {
+		Action: func(c *Context) error {
 			args = c.Args()
+			return nil
 		},
 	}
 	app.Commands = []Command{command}
@@ -289,6 +304,48 @@
 	expect(t, args[2], "notAFlagAtAll")
 }
 
+func TestApp_VisibleCommands(t *testing.T) {
+	app := NewApp()
+	app.Commands = []Command{
+		{
+			Name:     "frob",
+			HelpName: "foo frob",
+			Action:   func(_ *Context) error { return nil },
+		},
+		{
+			Name:     "frib",
+			HelpName: "foo frib",
+			Hidden:   true,
+			Action:   func(_ *Context) error { return nil },
+		},
+	}
+
+	app.Setup()
+	expected := []Command{
+		app.Commands[0],
+		app.Commands[2], // help
+	}
+	actual := app.VisibleCommands()
+	expect(t, len(expected), len(actual))
+	for i, actualCommand := range actual {
+		expectedCommand := expected[i]
+
+		if expectedCommand.Action != nil {
+			// comparing func addresses is OK!
+			expect(t, fmt.Sprintf("%p", expectedCommand.Action), fmt.Sprintf("%p", actualCommand.Action))
+		}
+
+		// nil out funcs, as they cannot be compared
+		// (https://github.com/golang/go/issues/8554)
+		expectedCommand.Action = nil
+		actualCommand.Action = nil
+
+		if !reflect.DeepEqual(expectedCommand, actualCommand) {
+			t.Errorf("expected\n%#v\n!=\n%#v", expectedCommand, actualCommand)
+		}
+	}
+}
+
 func TestApp_Float64Flag(t *testing.T) {
 	var meters float64
 
@@ -296,8 +353,9 @@
 	app.Flags = []Flag{
 		Float64Flag{Name: "height", Value: 1.5, Usage: "Set the height, in meters"},
 	}
-	app.Action = func(c *Context) {
+	app.Action = func(c *Context) error {
 		meters = c.Float64("height")
+		return nil
 	}
 
 	app.Run([]string{"", "--height", "1.93"})
@@ -316,11 +374,12 @@
 			IntSliceFlag{Name: "p", Value: &IntSlice{}, Usage: "set one or more ip addr"},
 			StringSliceFlag{Name: "ip", Value: &StringSlice{}, Usage: "set one or more ports to open"},
 		},
-		Action: func(c *Context) {
+		Action: func(c *Context) error {
 			parsedIntSlice = c.IntSlice("p")
 			parsedStringSlice = c.StringSlice("ip")
 			parsedOption = c.String("option")
 			firstArg = c.Args().First()
+			return nil
 		},
 	}
 	app.Commands = []Command{command}
@@ -373,9 +432,10 @@
 			IntSliceFlag{Name: "a", Usage: "set numbers"},
 			StringSliceFlag{Name: "str", Usage: "set strings"},
 		},
-		Action: func(c *Context) {
+		Action: func(c *Context) error {
 			parsedIntSlice = c.IntSlice("a")
 			parsedStringSlice = c.StringSlice("str")
+			return nil
 		},
 	}
 	app.Commands = []Command{command}
@@ -439,14 +499,15 @@
 }
 
 func TestApp_BeforeFunc(t *testing.T) {
-	beforeRun, subcommandRun := false, false
+	counts := &opCounts{}
 	beforeError := fmt.Errorf("fail")
 	var err error
 
 	app := NewApp()
 
 	app.Before = func(c *Context) error {
-		beforeRun = true
+		counts.Total++
+		counts.Before = counts.Total
 		s := c.String("opt")
 		if s == "fail" {
 			return beforeError
@@ -456,10 +517,12 @@
 	}
 
 	app.Commands = []Command{
-		Command{
+		{
 			Name: "sub",
-			Action: func(c *Context) {
-				subcommandRun = true
+			Action: func(c *Context) error {
+				counts.Total++
+				counts.SubCommand = counts.Total
+				return nil
 			},
 		},
 	}
@@ -475,16 +538,16 @@
 		t.Fatalf("Run error: %s", err)
 	}
 
-	if beforeRun == false {
+	if counts.Before != 1 {
 		t.Errorf("Before() not executed when expected")
 	}
 
-	if subcommandRun == false {
+	if counts.SubCommand != 2 {
 		t.Errorf("Subcommand not executed when expected")
 	}
 
 	// reset
-	beforeRun, subcommandRun = false, false
+	counts = &opCounts{}
 
 	// run with the Before() func failing
 	err = app.Run([]string{"command", "--opt", "fail", "sub"})
@@ -494,25 +557,49 @@
 		t.Errorf("Run error expected, but not received")
 	}
 
-	if beforeRun == false {
+	if counts.Before != 1 {
 		t.Errorf("Before() not executed when expected")
 	}
 
-	if subcommandRun == true {
+	if counts.SubCommand != 0 {
 		t.Errorf("Subcommand executed when NOT expected")
 	}
 
+	// reset
+	counts = &opCounts{}
+
+	afterError := errors.New("fail again")
+	app.After = func(_ *Context) error {
+		return afterError
+	}
+
+	// run with the Before() func failing, wrapped by After()
+	err = app.Run([]string{"command", "--opt", "fail", "sub"})
+
+	// should be the same error produced by the Before func
+	if _, ok := err.(MultiError); !ok {
+		t.Errorf("MultiError expected, but not received")
+	}
+
+	if counts.Before != 1 {
+		t.Errorf("Before() not executed when expected")
+	}
+
+	if counts.SubCommand != 0 {
+		t.Errorf("Subcommand executed when NOT expected")
+	}
 }
 
 func TestApp_AfterFunc(t *testing.T) {
-	afterRun, subcommandRun := false, false
+	counts := &opCounts{}
 	afterError := fmt.Errorf("fail")
 	var err error
 
 	app := NewApp()
 
 	app.After = func(c *Context) error {
-		afterRun = true
+		counts.Total++
+		counts.After = counts.Total
 		s := c.String("opt")
 		if s == "fail" {
 			return afterError
@@ -522,10 +609,12 @@
 	}
 
 	app.Commands = []Command{
-		Command{
+		{
 			Name: "sub",
-			Action: func(c *Context) {
-				subcommandRun = true
+			Action: func(c *Context) error {
+				counts.Total++
+				counts.SubCommand = counts.Total
+				return nil
 			},
 		},
 	}
@@ -541,16 +630,16 @@
 		t.Fatalf("Run error: %s", err)
 	}
 
-	if afterRun == false {
+	if counts.After != 2 {
 		t.Errorf("After() not executed when expected")
 	}
 
-	if subcommandRun == false {
+	if counts.SubCommand != 1 {
 		t.Errorf("Subcommand not executed when expected")
 	}
 
 	// reset
-	afterRun, subcommandRun = false, false
+	counts = &opCounts{}
 
 	// run with the Before() func failing
 	err = app.Run([]string{"command", "--opt", "fail", "sub"})
@@ -560,11 +649,11 @@
 		t.Errorf("Run error expected, but not received")
 	}
 
-	if afterRun == false {
+	if counts.After != 2 {
 		t.Errorf("After() not executed when expected")
 	}
 
-	if subcommandRun == false {
+	if counts.SubCommand != 1 {
 		t.Errorf("Subcommand not executed when expected")
 	}
 }
@@ -605,7 +694,7 @@
 	}
 }
 
-func TestAppVersionPrinter(t *testing.T) {
+func TestApp_VersionPrinter(t *testing.T) {
 	oldPrinter := VersionPrinter
 	defer func() {
 		VersionPrinter = oldPrinter
@@ -625,81 +714,172 @@
 	}
 }
 
-func TestAppCommandNotFound(t *testing.T) {
-	beforeRun, subcommandRun := false, false
+func TestApp_CommandNotFound(t *testing.T) {
+	counts := &opCounts{}
 	app := NewApp()
 
 	app.CommandNotFound = func(c *Context, command string) {
-		beforeRun = true
+		counts.Total++
+		counts.CommandNotFound = counts.Total
 	}
 
 	app.Commands = []Command{
-		Command{
+		{
 			Name: "bar",
-			Action: func(c *Context) {
-				subcommandRun = true
+			Action: func(c *Context) error {
+				counts.Total++
+				counts.SubCommand = counts.Total
+				return nil
 			},
 		},
 	}
 
 	app.Run([]string{"command", "foo"})
 
-	expect(t, beforeRun, true)
-	expect(t, subcommandRun, false)
+	expect(t, counts.CommandNotFound, 1)
+	expect(t, counts.SubCommand, 0)
+	expect(t, counts.Total, 1)
 }
 
-func TestGlobalFlag(t *testing.T) {
-	var globalFlag string
-	var globalFlagSet bool
+func TestApp_OrderOfOperations(t *testing.T) {
+	counts := &opCounts{}
+
+	resetCounts := func() { counts = &opCounts{} }
+
 	app := NewApp()
-	app.Flags = []Flag{
-		StringFlag{Name: "global, g", Usage: "global"},
-	}
-	app.Action = func(c *Context) {
-		globalFlag = c.GlobalString("global")
-		globalFlagSet = c.GlobalIsSet("global")
-	}
-	app.Run([]string{"command", "-g", "foo"})
-	expect(t, globalFlag, "foo")
-	expect(t, globalFlagSet, true)
-
-}
-
-func TestGlobalFlagsInSubcommands(t *testing.T) {
-	subcommandRun := false
-	parentFlag := false
-	app := NewApp()
-
-	app.Flags = []Flag{
-		BoolFlag{Name: "debug, d", Usage: "Enable debugging"},
+	app.EnableBashCompletion = true
+	app.BashComplete = func(c *Context) {
+		counts.Total++
+		counts.BashComplete = counts.Total
 	}
 
+	app.OnUsageError = func(c *Context, err error, isSubcommand bool) error {
+		counts.Total++
+		counts.OnUsageError = counts.Total
+		return errors.New("hay OnUsageError")
+	}
+
+	beforeNoError := func(c *Context) error {
+		counts.Total++
+		counts.Before = counts.Total
+		return nil
+	}
+
+	beforeError := func(c *Context) error {
+		counts.Total++
+		counts.Before = counts.Total
+		return errors.New("hay Before")
+	}
+
+	app.Before = beforeNoError
+	app.CommandNotFound = func(c *Context, command string) {
+		counts.Total++
+		counts.CommandNotFound = counts.Total
+	}
+
+	afterNoError := func(c *Context) error {
+		counts.Total++
+		counts.After = counts.Total
+		return nil
+	}
+
+	afterError := func(c *Context) error {
+		counts.Total++
+		counts.After = counts.Total
+		return errors.New("hay After")
+	}
+
+	app.After = afterNoError
 	app.Commands = []Command{
-		Command{
-			Name: "foo",
-			Flags: []Flag{
-				BoolFlag{Name: "parent, p", Usage: "Parent flag"},
-			},
-			Subcommands: []Command{
-				{
-					Name: "bar",
-					Action: func(c *Context) {
-						if c.GlobalBool("debug") {
-							subcommandRun = true
-						}
-						if c.GlobalBool("parent") {
-							parentFlag = true
-						}
-					},
-				},
+		{
+			Name: "bar",
+			Action: func(c *Context) error {
+				counts.Total++
+				counts.SubCommand = counts.Total
+				return nil
 			},
 		},
 	}
 
-	app.Run([]string{"command", "-d", "foo", "-p", "bar"})
+	app.Action = func(c *Context) error {
+		counts.Total++
+		counts.Action = counts.Total
+		return nil
+	}
 
-	expect(t, subcommandRun, true)
-	expect(t, parentFlag, true)
+	_ = app.Run([]string{"command", "--nope"})
+	expect(t, counts.OnUsageError, 1)
+	expect(t, counts.Total, 1)
+
+	resetCounts()
+
+	_ = app.Run([]string{"command", "--generate-bash-completion"})
+	expect(t, counts.BashComplete, 1)
+	expect(t, counts.Total, 1)
+
+	resetCounts()
+
+	oldOnUsageError := app.OnUsageError
+	app.OnUsageError = nil
+	_ = app.Run([]string{"command", "--nope"})
+	expect(t, counts.Total, 0)
+	app.OnUsageError = oldOnUsageError
+
+	resetCounts()
+
+	_ = app.Run([]string{"command", "foo"})
+	expect(t, counts.OnUsageError, 0)
+	expect(t, counts.Before, 1)
+	expect(t, counts.CommandNotFound, 0)
+	expect(t, counts.Action, 2)
+	expect(t, counts.After, 3)
+	expect(t, counts.Total, 3)
+
+	resetCounts()
+
+	app.Before = beforeError
+	_ = app.Run([]string{"command", "bar"})
+	expect(t, counts.OnUsageError, 0)
+	expect(t, counts.Before, 1)
+	expect(t, counts.After, 2)
+	expect(t, counts.Total, 2)
+	app.Before = beforeNoError
+
+	resetCounts()
+
+	app.After = nil
+	_ = app.Run([]string{"command", "bar"})
+	expect(t, counts.OnUsageError, 0)
+	expect(t, counts.Before, 1)
+	expect(t, counts.SubCommand, 2)
+	expect(t, counts.Total, 2)
+	app.After = afterNoError
+
+	resetCounts()
+
+	app.After = afterError
+	err := app.Run([]string{"command", "bar"})
+	if err == nil {
+		t.Fatalf("expected a non-nil error")
+	}
+	expect(t, counts.OnUsageError, 0)
+	expect(t, counts.Before, 1)
+	expect(t, counts.SubCommand, 2)
+	expect(t, counts.After, 3)
+	expect(t, counts.Total, 3)
+	app.After = afterNoError
+
+	resetCounts()
+
+	oldCommands := app.Commands
+	app.Commands = nil
+	_ = app.Run([]string{"command"})
+	expect(t, counts.OnUsageError, 0)
+	expect(t, counts.Before, 1)
+	expect(t, counts.Action, 2)
+	expect(t, counts.After, 3)
+	expect(t, counts.Total, 3)
+	app.Commands = oldCommands
 }
 
 func TestApp_Run_CommandWithSubcommandHasHelpTopic(t *testing.T) {
@@ -891,8 +1071,9 @@
 		app.Name = "boom"
 		app.Usage = "make an explosive entrance"
 		app.Writer = buf
-		app.Action = func(c *Context) {
+		app.Action = func(c *Context) error {
 			buf.WriteString("boom I say!")
+			return nil
 		}
 
 		err := app.Run(args)
@@ -922,8 +1103,9 @@
 		app.Usage = "make an explosive entrance"
 		app.Version = "0.1.0"
 		app.Writer = buf
-		app.Action = func(c *Context) {
+		app.Action = func(c *Context) error {
 			buf.WriteString("boom I say!")
+			return nil
 		}
 
 		err := app.Run(args)
@@ -943,16 +1125,17 @@
 func TestApp_Run_Categories(t *testing.T) {
 	app := NewApp()
 	app.Name = "categories"
+	app.HideHelp = true
 	app.Commands = []Command{
-		Command{
+		{
 			Name:     "command1",
 			Category: "1",
 		},
-		Command{
+		{
 			Name:     "command2",
 			Category: "1",
 		},
-		Command{
+		{
 			Name:     "command3",
 			Category: "2",
 		},
@@ -984,14 +1167,120 @@
 	output := buf.String()
 	t.Logf("output: %q\n", buf.Bytes())
 
-	if !strings.Contains(output, "1:\n    command1") {
-		t.Errorf("want buffer to include category %q, did not: \n%q", "1:\n    command1", output)
+	if !strings.Contains(output, "1:\n     command1") {
+		t.Errorf("want buffer to include category %q, did not: \n%q", "1:\n     command1", output)
 	}
 }
 
+func TestApp_VisibleCategories(t *testing.T) {
+	app := NewApp()
+	app.Name = "visible-categories"
+	app.HideHelp = true
+	app.Commands = []Command{
+		{
+			Name:     "command1",
+			Category: "1",
+			HelpName: "foo command1",
+			Hidden:   true,
+		},
+		{
+			Name:     "command2",
+			Category: "2",
+			HelpName: "foo command2",
+		},
+		{
+			Name:     "command3",
+			Category: "3",
+			HelpName: "foo command3",
+		},
+	}
+
+	expected := []*CommandCategory{
+		{
+			Name: "2",
+			Commands: []Command{
+				app.Commands[1],
+			},
+		},
+		{
+			Name: "3",
+			Commands: []Command{
+				app.Commands[2],
+			},
+		},
+	}
+
+	app.Setup()
+	expect(t, expected, app.VisibleCategories())
+
+	app = NewApp()
+	app.Name = "visible-categories"
+	app.HideHelp = true
+	app.Commands = []Command{
+		{
+			Name:     "command1",
+			Category: "1",
+			HelpName: "foo command1",
+			Hidden:   true,
+		},
+		{
+			Name:     "command2",
+			Category: "2",
+			HelpName: "foo command2",
+			Hidden:   true,
+		},
+		{
+			Name:     "command3",
+			Category: "3",
+			HelpName: "foo command3",
+		},
+	}
+
+	expected = []*CommandCategory{
+		{
+			Name: "3",
+			Commands: []Command{
+				app.Commands[2],
+			},
+		},
+	}
+
+	app.Setup()
+	expect(t, expected, app.VisibleCategories())
+
+	app = NewApp()
+	app.Name = "visible-categories"
+	app.HideHelp = true
+	app.Commands = []Command{
+		{
+			Name:     "command1",
+			Category: "1",
+			HelpName: "foo command1",
+			Hidden:   true,
+		},
+		{
+			Name:     "command2",
+			Category: "2",
+			HelpName: "foo command2",
+			Hidden:   true,
+		},
+		{
+			Name:     "command3",
+			Category: "3",
+			HelpName: "foo command3",
+			Hidden:   true,
+		},
+	}
+
+	expected = []*CommandCategory{}
+
+	app.Setup()
+	expect(t, expected, app.VisibleCategories())
+}
+
 func TestApp_Run_DoesNotOverwriteErrorFromBefore(t *testing.T) {
 	app := NewApp()
-	app.Action = func(c *Context) {}
+	app.Action = func(c *Context) error { return nil }
 	app.Before = func(c *Context) error { return fmt.Errorf("before error") }
 	app.After = func(c *Context) error { return fmt.Errorf("after error") }
 
@@ -1011,9 +1300,9 @@
 func TestApp_Run_SubcommandDoesNotOverwriteErrorFromBefore(t *testing.T) {
 	app := NewApp()
 	app.Commands = []Command{
-		Command{
+		{
 			Subcommands: []Command{
-				Command{
+				{
 					Name: "sub",
 				},
 			},
@@ -1051,7 +1340,7 @@
 		return errors.New("intercepted: " + err.Error())
 	}
 	app.Commands = []Command{
-		Command{
+		{
 			Name: "bar",
 		},
 	}
@@ -1081,7 +1370,7 @@
 		return errors.New("intercepted: " + err.Error())
 	}
 	app.Commands = []Command{
-		Command{
+		{
 			Name: "bar",
 		},
 	}
@@ -1095,3 +1384,88 @@
 		t.Errorf("Expect an intercepted error, but got \"%v\"", err)
 	}
 }
+
+func TestHandleAction_WithNonFuncAction(t *testing.T) {
+	app := NewApp()
+	app.Action = 42
+	err := HandleAction(app.Action, NewContext(app, flagSet(app.Name, app.Flags), nil))
+
+	if err == nil {
+		t.Fatalf("expected to receive error from Run, got none")
+	}
+
+	exitErr, ok := err.(*ExitError)
+
+	if !ok {
+		t.Fatalf("expected to receive a *ExitError")
+	}
+
+	if !strings.HasPrefix(exitErr.Error(), "ERROR invalid Action type") {
+		t.Fatalf("expected an unknown Action error, but got: %v", exitErr.Error())
+	}
+
+	if exitErr.ExitCode() != 2 {
+		t.Fatalf("expected error exit code to be 2, but got: %v", exitErr.ExitCode())
+	}
+}
+
+func TestHandleAction_WithInvalidFuncSignature(t *testing.T) {
+	app := NewApp()
+	app.Action = func() string { return "" }
+	err := HandleAction(app.Action, NewContext(app, flagSet(app.Name, app.Flags), nil))
+
+	if err == nil {
+		t.Fatalf("expected to receive error from Run, got none")
+	}
+
+	exitErr, ok := err.(*ExitError)
+
+	if !ok {
+		t.Fatalf("expected to receive a *ExitError")
+	}
+
+	if !strings.HasPrefix(exitErr.Error(), "ERROR unknown Action error") {
+		t.Fatalf("expected an unknown Action error, but got: %v", exitErr.Error())
+	}
+
+	if exitErr.ExitCode() != 2 {
+		t.Fatalf("expected error exit code to be 2, but got: %v", exitErr.ExitCode())
+	}
+}
+
+func TestHandleAction_WithInvalidFuncReturnSignature(t *testing.T) {
+	app := NewApp()
+	app.Action = func(_ *Context) (int, error) { return 0, nil }
+	err := HandleAction(app.Action, NewContext(app, flagSet(app.Name, app.Flags), nil))
+
+	if err == nil {
+		t.Fatalf("expected to receive error from Run, got none")
+	}
+
+	exitErr, ok := err.(*ExitError)
+
+	if !ok {
+		t.Fatalf("expected to receive a *ExitError")
+	}
+
+	if !strings.HasPrefix(exitErr.Error(), "ERROR invalid Action signature") {
+		t.Fatalf("expected an invalid Action signature error, but got: %v", exitErr.Error())
+	}
+
+	if exitErr.ExitCode() != 2 {
+		t.Fatalf("expected error exit code to be 2, but got: %v", exitErr.ExitCode())
+	}
+}
+
+func TestHandleAction_WithUnknownPanic(t *testing.T) {
+	defer func() { refute(t, recover(), nil) }()
+
+	var fn ActionFunc
+
+	app := NewApp()
+	app.Action = func(ctx *Context) error {
+		fn(ctx)
+		return nil
+	}
+	HandleAction(app.Action, NewContext(app, flagSet(app.Name, app.Flags), nil))
+}
diff --git a/vendor/github.com/codegangsta/cli/appveyor.yml b/vendor/github.com/codegangsta/cli/appveyor.yml
index 3ca7afa..173086e 100644
--- a/vendor/github.com/codegangsta/cli/appveyor.yml
+++ b/vendor/github.com/codegangsta/cli/appveyor.yml
@@ -2,15 +2,24 @@
 
 os: Windows Server 2012 R2
 
+clone_folder: c:\gopath\src\github.com\urfave\cli
+
+environment:
+  GOPATH: C:\gopath
+  GOVERSION: 1.6
+  PYTHON: C:\Python27-x64
+  PYTHON_VERSION: 2.7.x
+  PYTHON_ARCH: 64
+  GFMXR_DEBUG: 1
+
 install:
-  - go version
-  - go env
+- set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
+- go version
+- go env
+- go get github.com/urfave/gfmxr/...
+- go get -v -t ./...
 
 build_script:
-  - cd %APPVEYOR_BUILD_FOLDER%
-  - go vet ./...
-  - go test -v ./...
-
-test: off
-
-deploy: off
+- python runtests vet
+- python runtests test
+- python runtests gfmxr
diff --git a/vendor/github.com/codegangsta/cli/category.go b/vendor/github.com/codegangsta/cli/category.go
index 7dbf218..1a60550 100644
--- a/vendor/github.com/codegangsta/cli/category.go
+++ b/vendor/github.com/codegangsta/cli/category.go
@@ -1,7 +1,9 @@
 package cli
 
+// CommandCategories is a slice of *CommandCategory.
 type CommandCategories []*CommandCategory
 
+// CommandCategory is a category containing commands.
 type CommandCategory struct {
 	Name     string
 	Commands Commands
@@ -19,6 +21,7 @@
 	c[i], c[j] = c[j], c[i]
 }
 
+// AddCommand adds a command to a category.
 func (c CommandCategories) AddCommand(category string, command Command) CommandCategories {
 	for _, commandCategory := range c {
 		if commandCategory.Name == category {
@@ -28,3 +31,14 @@
 	}
 	return append(c, &CommandCategory{Name: category, Commands: []Command{command}})
 }
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (c *CommandCategory) VisibleCommands() []Command {
+	ret := []Command{}
+	for _, command := range c.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
diff --git a/vendor/github.com/codegangsta/cli/cli.go b/vendor/github.com/codegangsta/cli/cli.go
index 31dc912..f0440c5 100644
--- a/vendor/github.com/codegangsta/cli/cli.go
+++ b/vendor/github.com/codegangsta/cli/cli.go
@@ -10,31 +10,10 @@
 //     app := cli.NewApp()
 //     app.Name = "greet"
 //     app.Usage = "say a greeting"
-//     app.Action = func(c *cli.Context) {
+//     app.Action = func(c *cli.Context) error {
 //       println("Greetings")
 //     }
 //
 //     app.Run(os.Args)
 //   }
 package cli
-
-import (
-	"strings"
-)
-
-type MultiError struct {
-	Errors []error
-}
-
-func NewMultiError(err ...error) MultiError {
-	return MultiError{Errors: err}
-}
-
-func (m MultiError) Error() string {
-	errs := make([]string, len(m.Errors))
-	for i, err := range m.Errors {
-		errs[i] = err.Error()
-	}
-
-	return strings.Join(errs, "\n")
-}
diff --git a/vendor/github.com/codegangsta/cli/command.go b/vendor/github.com/codegangsta/cli/command.go
index 1a05b54..8950cca 100644
--- a/vendor/github.com/codegangsta/cli/command.go
+++ b/vendor/github.com/codegangsta/cli/command.go
@@ -26,19 +26,20 @@
 	// The category the command is part of
 	Category string
 	// The function to call when checking for bash command completions
-	BashComplete func(context *Context)
+	BashComplete BashCompleteFunc
 	// An action to execute before any sub-subcommands are run, but after the context is ready
 	// If a non-nil error is returned, no sub-subcommands are run
-	Before func(context *Context) error
-	// An action to execute after any subcommands are run, but before the subcommand has finished
+	Before BeforeFunc
+	// An action to execute after any subcommands are run, but after the subcommand has finished
 	// It is run even if Action() panics
-	After func(context *Context) error
+	After AfterFunc
 	// The function to call when this command is invoked
-	Action func(context *Context)
-	// Execute this function, if an usage error occurs. This is useful for displaying customized usage error messages.
-	// This function is able to replace the original error messages.
-	// If this function is not set, the "Incorrect usage" is displayed and the execution is interrupted.
-	OnUsageError func(context *Context, err error) error
+	Action interface{}
+	// TODO: replace `Action: interface{}` with `Action: ActionFunc` once some kind
+	// of deprecation period has passed, maybe?
+
+	// Execute this function if a usage error occurs.
+	OnUsageError OnUsageErrorFunc
 	// List of child commands
 	Subcommands Commands
 	// List of flags to parse
@@ -47,13 +48,15 @@
 	SkipFlagParsing bool
 	// Boolean to hide built-in help command
 	HideHelp bool
+	// Boolean to hide this command from help or completion
+	Hidden bool
 
 	// Full name of command for help, defaults to full command name, including parent commands.
 	HelpName        string
 	commandNamePath []string
 }
 
-// Returns the full name of the command.
+// FullName returns the full name of the command.
 // For subcommands this ensures that parent commands are part of the command path
 func (c Command) FullName() string {
 	if c.commandNamePath == nil {
@@ -62,9 +65,10 @@
 	return strings.Join(c.commandNamePath, " ")
 }
 
+// Commands is a slice of Command
 type Commands []Command
 
-// Invokes the command given the context, parses ctx.Args() to generate command-specific flags
+// Run invokes the command given the context, parses ctx.Args() to generate command-specific flags
 func (c Command) Run(ctx *Context) (err error) {
 	if len(c.Subcommands) > 0 {
 		return c.startApp(ctx)
@@ -125,14 +129,14 @@
 
 	if err != nil {
 		if c.OnUsageError != nil {
-			err := c.OnUsageError(ctx, err)
-			return err
-		} else {
-			fmt.Fprintln(ctx.App.Writer, "Incorrect Usage.")
-			fmt.Fprintln(ctx.App.Writer)
-			ShowCommandHelp(ctx, c.Name)
+			err := c.OnUsageError(ctx, err, false)
+			HandleExitCoder(err)
 			return err
 		}
+		fmt.Fprintln(ctx.App.Writer, "Incorrect Usage.")
+		fmt.Fprintln(ctx.App.Writer)
+		ShowCommandHelp(ctx, c.Name)
+		return err
 	}
 
 	nerr := normalizeFlags(c.Flags, set)
@@ -142,6 +146,7 @@
 		ShowCommandHelp(ctx, c.Name)
 		return nerr
 	}
+
 	context := NewContext(ctx.App, set, ctx)
 
 	if checkCommandCompletions(context, c.Name) {
@@ -156,6 +161,7 @@
 		defer func() {
 			afterErr := c.After(context)
 			if afterErr != nil {
+				HandleExitCoder(err)
 				if err != nil {
 					err = NewMultiError(err, afterErr)
 				} else {
@@ -166,20 +172,26 @@
 	}
 
 	if c.Before != nil {
-		err := c.Before(context)
+		err = c.Before(context)
 		if err != nil {
 			fmt.Fprintln(ctx.App.Writer, err)
 			fmt.Fprintln(ctx.App.Writer)
 			ShowCommandHelp(ctx, c.Name)
+			HandleExitCoder(err)
 			return err
 		}
 	}
 
 	context.Command = c
-	c.Action(context)
-	return nil
+	err = HandleAction(c.Action, context)
+
+	if err != nil {
+		HandleExitCoder(err)
+	}
+	return err
 }
 
+// Names returns the names including short names and aliases.
 func (c Command) Names() []string {
 	names := []string{c.Name}
 
@@ -190,7 +202,7 @@
 	return append(names, c.Aliases...)
 }
 
-// Returns true if Command.Name or Command.ShortName matches given name
+// HasName returns true if Command.Name or Command.ShortName matches given name
 func (c Command) HasName(name string) bool {
 	for _, n := range c.Names() {
 		if n == name {
@@ -202,7 +214,7 @@
 
 func (c Command) startApp(ctx *Context) error {
 	app := NewApp()
-
+	app.Metadata = ctx.App.Metadata
 	// set the name and usage
 	app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
 	if c.HelpName == "" {
@@ -260,3 +272,8 @@
 
 	return app.RunAsSubcommand(ctx)
 }
+
+// VisibleFlags returns a slice of the Flags with Hidden=false
+func (c Command) VisibleFlags() []Flag {
+	return visibleFlags(c.Flags)
+}
diff --git a/vendor/github.com/codegangsta/cli/command_test.go b/vendor/github.com/codegangsta/cli/command_test.go
index 827da1d..6608254 100644
--- a/vendor/github.com/codegangsta/cli/command_test.go
+++ b/vendor/github.com/codegangsta/cli/command_test.go
@@ -34,7 +34,7 @@
 			Aliases:     []string{"tc"},
 			Usage:       "this is for testing",
 			Description: "testing",
-			Action:      func(_ *Context) {},
+			Action:      func(_ *Context) error { return nil },
 		}
 
 		command.SkipFlagParsing = c.skipFlagParsing
@@ -49,10 +49,14 @@
 func TestCommand_Run_DoesNotOverwriteErrorFromBefore(t *testing.T) {
 	app := NewApp()
 	app.Commands = []Command{
-		Command{
-			Name:   "bar",
-			Before: func(c *Context) error { return fmt.Errorf("before error") },
-			After:  func(c *Context) error { return fmt.Errorf("after error") },
+		{
+			Name: "bar",
+			Before: func(c *Context) error {
+				return fmt.Errorf("before error")
+			},
+			After: func(c *Context) error {
+				return fmt.Errorf("after error")
+			},
 		},
 	}
 
@@ -72,12 +76,12 @@
 func TestCommand_OnUsageError_WithWrongFlagValue(t *testing.T) {
 	app := NewApp()
 	app.Commands = []Command{
-		Command{
-			Name:   "bar",
+		{
+			Name: "bar",
 			Flags: []Flag{
 				IntFlag{Name: "flag"},
 			},
-			OnUsageError: func(c *Context, err error) error {
+			OnUsageError: func(c *Context, err error, _ bool) error {
 				if !strings.HasPrefix(err.Error(), "invalid value \"wrong\"") {
 					t.Errorf("Expect an invalid value error, but got \"%v\"", err)
 				}
diff --git a/vendor/github.com/codegangsta/cli/context.go b/vendor/github.com/codegangsta/cli/context.go
index b66d278..879bae5 100644
--- a/vendor/github.com/codegangsta/cli/context.go
+++ b/vendor/github.com/codegangsta/cli/context.go
@@ -21,57 +21,83 @@
 	parentContext  *Context
 }
 
-// Creates a new context. For use in when invoking an App or Command action.
+// NewContext creates a new context. For use in when invoking an App or Command action.
 func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context {
 	return &Context{App: app, flagSet: set, parentContext: parentCtx}
 }
 
-// Looks up the value of a local int flag, returns 0 if no int flag exists
+// Int looks up the value of a local int flag, returns 0 if no int flag exists
 func (c *Context) Int(name string) int {
 	return lookupInt(name, c.flagSet)
 }
 
-// Looks up the value of a local time.Duration flag, returns 0 if no time.Duration flag exists
+// Int64 looks up the value of a local int flag, returns 0 if no int flag exists
+func (c *Context) Int64(name string) int64 {
+	return lookupInt64(name, c.flagSet)
+}
+
+// Uint looks up the value of a local int flag, returns 0 if no int flag exists
+func (c *Context) Uint(name string) uint {
+	return lookupUint(name, c.flagSet)
+}
+
+// Uint64 looks up the value of a local int flag, returns 0 if no int flag exists
+func (c *Context) Uint64(name string) uint64 {
+	return lookupUint64(name, c.flagSet)
+}
+
+// Duration looks up the value of a local time.Duration flag, returns 0 if no
+// time.Duration flag exists
 func (c *Context) Duration(name string) time.Duration {
 	return lookupDuration(name, c.flagSet)
 }
 
-// Looks up the value of a local float64 flag, returns 0 if no float64 flag exists
+// Float64 looks up the value of a local float64 flag, returns 0 if no float64
+// flag exists
 func (c *Context) Float64(name string) float64 {
 	return lookupFloat64(name, c.flagSet)
 }
 
-// Looks up the value of a local bool flag, returns false if no bool flag exists
+// Bool looks up the value of a local bool flag, returns false if no bool flag exists
 func (c *Context) Bool(name string) bool {
 	return lookupBool(name, c.flagSet)
 }
 
-// Looks up the value of a local boolT flag, returns false if no bool flag exists
+// BoolT looks up the value of a local boolT flag, returns false if no bool flag exists
 func (c *Context) BoolT(name string) bool {
 	return lookupBoolT(name, c.flagSet)
 }
 
-// Looks up the value of a local string flag, returns "" if no string flag exists
+// String looks up the value of a local string flag, returns "" if no string flag exists
 func (c *Context) String(name string) string {
 	return lookupString(name, c.flagSet)
 }
 
-// Looks up the value of a local string slice flag, returns nil if no string slice flag exists
+// StringSlice looks up the value of a local string slice flag, returns nil if no
+// string slice flag exists
 func (c *Context) StringSlice(name string) []string {
 	return lookupStringSlice(name, c.flagSet)
 }
 
-// Looks up the value of a local int slice flag, returns nil if no int slice flag exists
+// IntSlice looks up the value of a local int slice flag, returns nil if no int
+// slice flag exists
 func (c *Context) IntSlice(name string) []int {
 	return lookupIntSlice(name, c.flagSet)
 }
 
-// Looks up the value of a local generic flag, returns nil if no generic flag exists
+// Int64Slice looks up the value of a local int slice flag, returns nil if no int
+// slice flag exists
+func (c *Context) Int64Slice(name string) []int64 {
+	return lookupInt64Slice(name, c.flagSet)
+}
+
+// Generic looks up the value of a local generic flag, returns nil if no generic
+// flag exists
 func (c *Context) Generic(name string) interface{} {
 	return lookupGeneric(name, c.flagSet)
 }
 
-// Looks up the value of a global int flag, returns 0 if no int flag exists
+// GlobalInt looks up the value of a global int flag, returns 0 if no int flag exists
 func (c *Context) GlobalInt(name string) int {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupInt(name, fs)
@@ -79,7 +105,41 @@
 	return 0
 }
 
-// Looks up the value of a global time.Duration flag, returns 0 if no time.Duration flag exists
+// GlobalInt64 looks up the value of a global int flag, returns 0 if no int flag exists
+func (c *Context) GlobalInt64(name string) int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64(name, fs)
+	}
+	return 0
+}
+
+// GlobalUint looks up the value of a global int flag, returns 0 if no int flag exists
+func (c *Context) GlobalUint(name string) uint {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint(name, fs)
+	}
+	return 0
+}
+
+// GlobalUint64 looks up the value of a global int flag, returns 0 if no int flag exists
+func (c *Context) GlobalUint64(name string) uint64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint64(name, fs)
+	}
+	return 0
+}
+
+// GlobalFloat64 looks up the value of a global float64 flag, returns float64(0)
+// if no float64 flag exists
+func (c *Context) GlobalFloat64(name string) float64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupFloat64(name, fs)
+	}
+	return float64(0)
+}
+
+// GlobalDuration looks up the value of a global time.Duration flag, returns 0
+// if no time.Duration flag exists
 func (c *Context) GlobalDuration(name string) time.Duration {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupDuration(name, fs)
@@ -87,7 +147,8 @@
 	return 0
 }
 
-// Looks up the value of a global bool flag, returns false if no bool flag exists
+// GlobalBool looks up the value of a global bool flag, returns false if no bool
+// flag exists
 func (c *Context) GlobalBool(name string) bool {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupBool(name, fs)
@@ -95,7 +156,17 @@
 	return false
 }
 
-// Looks up the value of a global string flag, returns "" if no string flag exists
+// GlobalBoolT looks up the value of a global bool flag, returns true if no bool
+// flag exists
+func (c *Context) GlobalBoolT(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBoolT(name, fs)
+	}
+	return false
+}
+
+// GlobalString looks up the value of a global string flag, returns "" if no
+// string flag exists
 func (c *Context) GlobalString(name string) string {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupString(name, fs)
@@ -103,7 +174,8 @@
 	return ""
 }
 
-// Looks up the value of a global string slice flag, returns nil if no string slice flag exists
+// GlobalStringSlice looks up the value of a global string slice flag, returns
+// nil if no string slice flag exists
 func (c *Context) GlobalStringSlice(name string) []string {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupStringSlice(name, fs)
@@ -111,7 +183,8 @@
 	return nil
 }
 
-// Looks up the value of a global int slice flag, returns nil if no int slice flag exists
+// GlobalIntSlice looks up the value of a global int slice flag, returns nil if
+// no int slice flag exists
 func (c *Context) GlobalIntSlice(name string) []int {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupIntSlice(name, fs)
@@ -119,7 +192,17 @@
 	return nil
 }
 
-// Looks up the value of a global generic flag, returns nil if no generic flag exists
+// GlobalInt64Slice looks up the value of a global int slice flag, returns nil if
+// no int slice flag exists
+func (c *Context) GlobalInt64Slice(name string) []int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64Slice(name, fs)
+	}
+	return nil
+}
+
+// GlobalGeneric looks up the value of a global generic flag, returns nil if no
+// generic flag exists
 func (c *Context) GlobalGeneric(name string) interface{} {
 	if fs := lookupGlobalFlagSet(name, c); fs != nil {
 		return lookupGeneric(name, fs)
@@ -127,12 +210,22 @@
 	return nil
 }
 
-// Returns the number of flags set
+// NumFlags returns the number of flags set
 func (c *Context) NumFlags() int {
 	return c.flagSet.NFlag()
 }
 
-// Determines if the flag was actually set
+// Set sets a context flag to a value.
+func (c *Context) Set(name, value string) error {
+	return c.flagSet.Set(name, value)
+}
+
+// GlobalSet sets a context flag to a value on the global flagset
+func (c *Context) GlobalSet(name, value string) error {
+	return globalContext(c).flagSet.Set(name, value)
+}
+
+// IsSet determines if the flag was actually set
 func (c *Context) IsSet(name string) bool {
 	if c.setFlags == nil {
 		c.setFlags = make(map[string]bool)
@@ -143,7 +236,7 @@
 	return c.setFlags[name] == true
 }
 
-// Determines if the global flag was actually set
+// GlobalIsSet determines if the global flag was actually set
 func (c *Context) GlobalIsSet(name string) bool {
 	if c.globalSetFlags == nil {
 		c.globalSetFlags = make(map[string]bool)
@@ -160,7 +253,7 @@
 	return c.globalSetFlags[name]
 }
 
-// Returns a slice of flag names used in this context.
+// FlagNames returns a slice of flag names used in this context.
 func (c *Context) FlagNames() (names []string) {
 	for _, flag := range c.Command.Flags {
 		name := strings.Split(flag.GetName(), ",")[0]
@@ -172,7 +265,7 @@
 	return
 }
 
-// Returns a slice of global flag names used by the app.
+// GlobalFlagNames returns a slice of global flag names used by the app.
 func (c *Context) GlobalFlagNames() (names []string) {
 	for _, flag := range c.App.Flags {
 		name := strings.Split(flag.GetName(), ",")[0]
@@ -184,25 +277,26 @@
 	return
 }
 
-// Returns the parent context, if any
+// Parent returns the parent context, if any
 func (c *Context) Parent() *Context {
 	return c.parentContext
 }
 
+// Args contains apps console arguments
 type Args []string
 
-// Returns the command line arguments associated with the context.
+// Args returns the command line arguments associated with the context.
 func (c *Context) Args() Args {
 	args := Args(c.flagSet.Args())
 	return args
 }
 
-// Returns the number of the command line arguments.
+// NArg returns the number of the command line arguments.
 func (c *Context) NArg() int {
 	return len(c.Args())
 }
 
-// Returns the nth argument, or else a blank string
+// Get returns the nth argument, or else a blank string
 func (a Args) Get(n int) string {
 	if len(a) > n {
 		return a[n]
@@ -210,12 +304,12 @@
 	return ""
 }
 
-// Returns the first argument, or else a blank string
+// First returns the first argument, or else a blank string
 func (a Args) First() string {
 	return a.Get(0)
 }
 
-// Return the rest of the arguments (not the first one)
+// Tail returns the rest of the arguments (not the first one)
 // or else an empty string slice
 func (a Args) Tail() []string {
 	if len(a) >= 2 {
@@ -224,12 +318,12 @@
 	return []string{}
 }
 
-// Checks if there are any arguments present
+// Present checks if there are any arguments present
 func (a Args) Present() bool {
 	return len(a) != 0
 }
 
-// Swaps arguments at the given indexes
+// Swap swaps arguments at the given indexes
 func (a Args) Swap(from, to int) error {
 	if from >= len(a) || to >= len(a) {
 		return errors.New("index out of range")
@@ -238,6 +332,19 @@
 	return nil
 }
 
+func globalContext(ctx *Context) *Context {
+	if ctx == nil {
+		return nil
+	}
+
+	for {
+		if ctx.parentContext == nil {
+			return ctx
+		}
+		ctx = ctx.parentContext
+	}
+}
+
 func lookupGlobalFlagSet(name string, ctx *Context) *flag.FlagSet {
 	if ctx.parentContext != nil {
 		ctx = ctx.parentContext
@@ -253,7 +360,46 @@
 func lookupInt(name string, set *flag.FlagSet) int {
 	f := set.Lookup(name)
 	if f != nil {
-		val, err := strconv.Atoi(f.Value.String())
+		val, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return int(val)
+	}
+
+	return 0
+}
+
+func lookupInt64(name string, set *flag.FlagSet) int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		val, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return val
+	}
+
+	return 0
+}
+
+func lookupUint(name string, set *flag.FlagSet) uint {
+	f := set.Lookup(name)
+	if f != nil {
+		val, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return uint(val)
+	}
+
+	return 0
+}
+
+func lookupUint64(name string, set *flag.FlagSet) uint64 {
+	f := set.Lookup(name)
+	if f != nil {
+		val, err := strconv.ParseUint(f.Value.String(), 0, 64)
 		if err != nil {
 			return 0
 		}
@@ -317,6 +463,16 @@
 	return nil
 }
 
+func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		return (f.Value.(*Int64Slice)).Value()
+
+	}
+
+	return nil
+}
+
 func lookupGeneric(name string, set *flag.FlagSet) interface{} {
 	f := set.Lookup(name)
 	if f != nil {
diff --git a/vendor/github.com/codegangsta/cli/context_test.go b/vendor/github.com/codegangsta/cli/context_test.go
index b8ab37d..5c68fdd 100644
--- a/vendor/github.com/codegangsta/cli/context_test.go
+++ b/vendor/github.com/codegangsta/cli/context_test.go
@@ -9,14 +9,30 @@
 func TestNewContext(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Int("myflag", 12, "doc")
+	set.Int64("myflagInt64", int64(12), "doc")
+	set.Uint("myflagUint", uint(93), "doc")
+	set.Uint64("myflagUint64", uint64(93), "doc")
+	set.Float64("myflag64", float64(17), "doc")
 	globalSet := flag.NewFlagSet("test", 0)
 	globalSet.Int("myflag", 42, "doc")
+	globalSet.Int64("myflagInt64", int64(42), "doc")
+	globalSet.Uint("myflagUint", uint(33), "doc")
+	globalSet.Uint64("myflagUint64", uint64(33), "doc")
+	globalSet.Float64("myflag64", float64(47), "doc")
 	globalCtx := NewContext(nil, globalSet, nil)
 	command := Command{Name: "mycommand"}
 	c := NewContext(nil, set, globalCtx)
 	c.Command = command
 	expect(t, c.Int("myflag"), 12)
+	expect(t, c.Int64("myflagInt64"), int64(12))
+	expect(t, c.Uint("myflagUint"), uint(93))
+	expect(t, c.Uint64("myflagUint64"), uint64(93))
+	expect(t, c.Float64("myflag64"), float64(17))
 	expect(t, c.GlobalInt("myflag"), 42)
+	expect(t, c.GlobalInt64("myflagInt64"), int64(42))
+	expect(t, c.GlobalUint("myflagUint"), uint(33))
+	expect(t, c.GlobalUint64("myflagUint64"), uint64(33))
+	expect(t, c.GlobalFloat64("myflag64"), float64(47))
 	expect(t, c.Command.Name, "mycommand")
 }
 
@@ -27,6 +43,58 @@
 	expect(t, c.Int("myflag"), 12)
 }
 
+func TestContext_Int64(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Int64("myflagInt64", 12, "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.Int64("myflagInt64"), int64(12))
+}
+
+func TestContext_Uint(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Uint("myflagUint", uint(13), "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.Uint("myflagUint"), uint(13))
+}
+
+func TestContext_Uint64(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Uint64("myflagUint64", uint64(9), "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.Uint64("myflagUint64"), uint64(9))
+}
+
+func TestContext_GlobalInt(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Int("myflag", 12, "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.GlobalInt("myflag"), 12)
+	expect(t, c.GlobalInt("nope"), 0)
+}
+
+func TestContext_GlobalInt64(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Int64("myflagInt64", 12, "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.GlobalInt64("myflagInt64"), int64(12))
+	expect(t, c.GlobalInt64("nope"), int64(0))
+}
+
+func TestContext_Float64(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Float64("myflag", float64(17), "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.Float64("myflag"), float64(17))
+}
+
+func TestContext_GlobalFloat64(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Float64("myflag", float64(17), "doc")
+	c := NewContext(nil, set, nil)
+	expect(t, c.GlobalFloat64("myflag"), float64(17))
+	expect(t, c.GlobalFloat64("nope"), float64(0))
+}
+
 func TestContext_Duration(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Duration("myflag", time.Duration(12*time.Second), "doc")
@@ -55,6 +123,30 @@
 	expect(t, c.BoolT("myflag"), true)
 }
 
+func TestContext_GlobalBool(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+
+	globalSet := flag.NewFlagSet("test-global", 0)
+	globalSet.Bool("myflag", false, "doc")
+	globalCtx := NewContext(nil, globalSet, nil)
+
+	c := NewContext(nil, set, globalCtx)
+	expect(t, c.GlobalBool("myflag"), false)
+	expect(t, c.GlobalBool("nope"), false)
+}
+
+func TestContext_GlobalBoolT(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+
+	globalSet := flag.NewFlagSet("test-global", 0)
+	globalSet.Bool("myflag", true, "doc")
+	globalCtx := NewContext(nil, globalSet, nil)
+
+	c := NewContext(nil, set, globalCtx)
+	expect(t, c.GlobalBoolT("myflag"), true)
+	expect(t, c.GlobalBoolT("nope"), false)
+}
+
 func TestContext_Args(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Bool("myflag", false, "doc")
@@ -119,3 +211,87 @@
 	globalSet.Parse([]string{"--myflagGlobal"})
 	expect(t, c.NumFlags(), 2)
 }
+
+func TestContext_GlobalFlag(t *testing.T) {
+	var globalFlag string
+	var globalFlagSet bool
+	app := NewApp()
+	app.Flags = []Flag{
+		StringFlag{Name: "global, g", Usage: "global"},
+	}
+	app.Action = func(c *Context) error {
+		globalFlag = c.GlobalString("global")
+		globalFlagSet = c.GlobalIsSet("global")
+		return nil
+	}
+	app.Run([]string{"command", "-g", "foo"})
+	expect(t, globalFlag, "foo")
+	expect(t, globalFlagSet, true)
+
+}
+
+func TestContext_GlobalFlagsInSubcommands(t *testing.T) {
+	subcommandRun := false
+	parentFlag := false
+	app := NewApp()
+
+	app.Flags = []Flag{
+		BoolFlag{Name: "debug, d", Usage: "Enable debugging"},
+	}
+
+	app.Commands = []Command{
+		{
+			Name: "foo",
+			Flags: []Flag{
+				BoolFlag{Name: "parent, p", Usage: "Parent flag"},
+			},
+			Subcommands: []Command{
+				{
+					Name: "bar",
+					Action: func(c *Context) error {
+						if c.GlobalBool("debug") {
+							subcommandRun = true
+						}
+						if c.GlobalBool("parent") {
+							parentFlag = true
+						}
+						return nil
+					},
+				},
+			},
+		},
+	}
+
+	app.Run([]string{"command", "-d", "foo", "-p", "bar"})
+
+	expect(t, subcommandRun, true)
+	expect(t, parentFlag, true)
+}
+
+func TestContext_Set(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Int("int", 5, "an int")
+	c := NewContext(nil, set, nil)
+
+	c.Set("int", "1")
+	expect(t, c.Int("int"), 1)
+}
+
+func TestContext_GlobalSet(t *testing.T) {
+	gSet := flag.NewFlagSet("test", 0)
+	gSet.Int("int", 5, "an int")
+
+	set := flag.NewFlagSet("sub", 0)
+	set.Int("int", 3, "an int")
+
+	pc := NewContext(nil, gSet, nil)
+	c := NewContext(nil, set, pc)
+
+	c.Set("int", "1")
+	expect(t, c.Int("int"), 1)
+	expect(t, c.GlobalInt("int"), 5)
+
+	c.GlobalSet("int", "1")
+	expect(t, c.Int("int"), 1)
+	expect(t, c.GlobalInt("int"), 1)
+}
diff --git a/vendor/github.com/codegangsta/cli/errors.go b/vendor/github.com/codegangsta/cli/errors.go
new file mode 100644
index 0000000..ea551be
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/errors.go
@@ -0,0 +1,92 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// OsExiter is the function used when the app exits. If not set defaults to os.Exit.
+var OsExiter = os.Exit
+
+// ErrWriter is used to write errors to the user. This can be anything
+// implementing the io.Writer interface and defaults to os.Stderr.
+var ErrWriter io.Writer = os.Stderr
+
+// MultiError is an error that wraps multiple errors.
+type MultiError struct {
+	Errors []error
+}
+
+// NewMultiError creates a new MultiError. Pass in one or more errors.
+func NewMultiError(err ...error) MultiError {
+	return MultiError{Errors: err}
+}
+
+// Error implents the error interface.
+func (m MultiError) Error() string {
+	errs := make([]string, len(m.Errors))
+	for i, err := range m.Errors {
+		errs[i] = err.Error()
+	}
+
+	return strings.Join(errs, "\n")
+}
+
+// ExitCoder is the interface checked by `App` and `Command` for a custom exit
+// code
+type ExitCoder interface {
+	error
+	ExitCode() int
+}
+
+// ExitError fulfills both the builtin `error` interface and `ExitCoder`
+type ExitError struct {
+	exitCode int
+	message  string
+}
+
+// NewExitError makes a new *ExitError
+func NewExitError(message string, exitCode int) *ExitError {
+	return &ExitError{
+		exitCode: exitCode,
+		message:  message,
+	}
+}
+
+// Error returns the string message, fulfilling the interface required by
+// `error`
+func (ee *ExitError) Error() string {
+	return ee.message
+}
+
+// ExitCode returns the exit code, fulfilling the interface required by
+// `ExitCoder`
+func (ee *ExitError) ExitCode() int {
+	return ee.exitCode
+}
+
+// HandleExitCoder checks if the error fulfills the ExitCoder interface, and if
+// so prints the error to stderr (if it is non-empty) and calls OsExiter with the
+// given exit code.  If the given error is a MultiError, then this func is
+// called on all members of the Errors slice.
+func HandleExitCoder(err error) {
+	if err == nil {
+		return
+	}
+
+	if exitErr, ok := err.(ExitCoder); ok {
+		if err.Error() != "" {
+			fmt.Fprintln(ErrWriter, err)
+		}
+		OsExiter(exitErr.ExitCode())
+		return
+	}
+
+	if multiErr, ok := err.(MultiError); ok {
+		for _, merr := range multiErr.Errors {
+			HandleExitCoder(merr)
+		}
+	}
+}
diff --git a/vendor/github.com/codegangsta/cli/errors_test.go b/vendor/github.com/codegangsta/cli/errors_test.go
new file mode 100644
index 0000000..8f5f284
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/errors_test.go
@@ -0,0 +1,60 @@
+package cli
+
+import (
+	"errors"
+	"os"
+	"testing"
+)
+
+func TestHandleExitCoder_nil(t *testing.T) {
+	exitCode := 0
+	called := false
+
+	OsExiter = func(rc int) {
+		exitCode = rc
+		called = true
+	}
+
+	defer func() { OsExiter = os.Exit }()
+
+	HandleExitCoder(nil)
+
+	expect(t, exitCode, 0)
+	expect(t, called, false)
+}
+
+func TestHandleExitCoder_ExitCoder(t *testing.T) {
+	exitCode := 0
+	called := false
+
+	OsExiter = func(rc int) {
+		exitCode = rc
+		called = true
+	}
+
+	defer func() { OsExiter = os.Exit }()
+
+	HandleExitCoder(NewExitError("galactic perimeter breach", 9))
+
+	expect(t, exitCode, 9)
+	expect(t, called, true)
+}
+
+func TestHandleExitCoder_MultiErrorWithExitCoder(t *testing.T) {
+	exitCode := 0
+	called := false
+
+	OsExiter = func(rc int) {
+		exitCode = rc
+		called = true
+	}
+
+	defer func() { OsExiter = os.Exit }()
+
+	exitErr := NewExitError("galactic perimeter breach", 9)
+	err := NewMultiError(errors.New("wowsa"), errors.New("egad"), exitErr)
+	HandleExitCoder(err)
+
+	expect(t, exitCode, 9)
+	expect(t, called, true)
+}
diff --git a/vendor/github.com/codegangsta/cli/flag.go b/vendor/github.com/codegangsta/cli/flag.go
index e951c2d..f8a28d1 100644
--- a/vendor/github.com/codegangsta/cli/flag.go
+++ b/vendor/github.com/codegangsta/cli/flag.go
@@ -4,24 +4,28 @@
 	"flag"
 	"fmt"
 	"os"
+	"reflect"
 	"runtime"
 	"strconv"
 	"strings"
 	"time"
 )
 
-// This flag enables bash-completion for all commands and subcommands
+const defaultPlaceholder = "value"
+
+// BashCompletionFlag enables bash-completion for all commands and subcommands
 var BashCompletionFlag = BoolFlag{
-	Name: "generate-bash-completion",
+	Name:   "generate-bash-completion",
+	Hidden: true,
 }
 
-// This flag prints the version for the application
+// VersionFlag prints the version for the application
 var VersionFlag = BoolFlag{
 	Name:  "version, v",
 	Usage: "print the version",
 }
 
-// This flag prints the help for all commands and subcommands
+// HelpFlag prints the help for all commands and subcommands
 // Set to the zero value (BoolFlag{}) to disable flag -- keeps subcommand
 // unless HideHelp is set to true)
 var HelpFlag = BoolFlag{
@@ -29,6 +33,10 @@
 	Usage: "show help",
 }
 
+// FlagStringer converts a flag definition to a string. This is used by help
+// to display a flag.
+var FlagStringer FlagStringFunc = stringifyFlag
+
 // Flag is a common interface related to parsing flags in cli.
 // For more advanced flag parsing techniques, it is recommended that
 // this interface be implemented.
@@ -68,24 +76,14 @@
 	Value  Generic
 	Usage  string
 	EnvVar string
+	Hidden bool
 }
 
 // String returns the string representation of the generic flag to display the
 // help text to the user (uses the String() method of the generic flag to show
 // the value)
 func (f GenericFlag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name), f.FormatValueHelp(), f.Usage))
-}
-
-func (f GenericFlag) FormatValueHelp() string {
-	if f.Value == nil {
-		return ""
-	}
-	s := f.Value.String()
-	if len(s) == 0 {
-		return ""
-	}
-	return fmt.Sprintf("\"%s\"", s)
+	return FlagStringer(f)
 }
 
 // Apply takes the flagset and calls Set on the generic flag with the value
@@ -107,6 +105,7 @@
 	})
 }
 
+// GetName returns the name of a flag.
 func (f GenericFlag) GetName() string {
 	return f.Name
 }
@@ -130,20 +129,19 @@
 	return *f
 }
 
-// StringSlice is a string flag that can be specified multiple times on the
+// StringSliceFlag is a string flag that can be specified multiple times on the
 // command-line
 type StringSliceFlag struct {
 	Name   string
 	Value  *StringSlice
 	Usage  string
 	EnvVar string
+	Hidden bool
 }
 
 // String returns the usage
 func (f StringSliceFlag) String() string {
-	firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
-	pref := prefixFor(firstName)
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -171,11 +169,12 @@
 	})
 }
 
+// GetName returns the name of a flag.
 func (f StringSliceFlag) GetName() string {
 	return f.Name
 }
 
-// StringSlice is an opaque type for []int to satisfy flag.Value
+// IntSlice is an opaque type for []int to satisfy flag.Value
 type IntSlice []int
 
 // Set parses the value into an integer and appends it to the list of values
@@ -183,15 +182,14 @@
 	tmp, err := strconv.Atoi(value)
 	if err != nil {
 		return err
-	} else {
-		*f = append(*f, tmp)
 	}
+	*f = append(*f, tmp)
 	return nil
 }
 
 // String returns a readable representation of this value (for usage defaults)
 func (f *IntSlice) String() string {
-	return fmt.Sprintf("%d", *f)
+	return fmt.Sprintf("%#v", *f)
 }
 
 // Value returns the slice of ints set by this flag
@@ -206,13 +204,12 @@
 	Value  *IntSlice
 	Usage  string
 	EnvVar string
+	Hidden bool
 }
 
 // String returns the usage
 func (f IntSliceFlag) String() string {
-	firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
-	pref := prefixFor(firstName)
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -226,7 +223,7 @@
 					s = strings.TrimSpace(s)
 					err := newVal.Set(s)
 					if err != nil {
-						fmt.Fprintf(os.Stderr, err.Error())
+						fmt.Fprintf(ErrWriter, err.Error())
 					}
 				}
 				f.Value = newVal
@@ -243,21 +240,94 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f IntSliceFlag) GetName() string {
 	return f.Name
 }
 
+// Int64Slice is an opaque type for []int to satisfy flag.Value
+type Int64Slice []int64
+
+// Set parses the value into an integer and appends it to the list of values
+func (f *Int64Slice) Set(value string) error {
+	tmp, err := strconv.ParseInt(value, 10, 64)
+	if err != nil {
+		return err
+	}
+	*f = append(*f, tmp)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *Int64Slice) String() string {
+	return fmt.Sprintf("%#v", *f)
+}
+
+// Value returns the slice of ints set by this flag
+func (f *Int64Slice) Value() []int64 {
+	return *f
+}
+
+// Int64SliceFlag is an int flag that can be specified multiple times on the
+// command-line
+type Int64SliceFlag struct {
+	Name   string
+	Value  *Int64Slice
+	Usage  string
+	EnvVar string
+	Hidden bool
+}
+
+// String returns the usage
+func (f Int64SliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f Int64SliceFlag) Apply(set *flag.FlagSet) {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal := os.Getenv(envVar); envVal != "" {
+				newVal := &Int64Slice{}
+				for _, s := range strings.Split(envVal, ",") {
+					s = strings.TrimSpace(s)
+					err := newVal.Set(s)
+					if err != nil {
+						fmt.Fprintf(ErrWriter, err.Error())
+					}
+				}
+				f.Value = newVal
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &Int64Slice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+}
+
+// GetName returns the name of the flag.
+func (f Int64SliceFlag) GetName() string {
+	return f.Name
+}
+
 // BoolFlag is a switch that defaults to false
 type BoolFlag struct {
 	Name        string
 	Usage       string
 	EnvVar      string
 	Destination *bool
+	Hidden      bool
 }
 
 // String returns a readable representation of this value (for usage defaults)
 func (f BoolFlag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -285,6 +355,7 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f BoolFlag) GetName() string {
 	return f.Name
 }
@@ -296,11 +367,12 @@
 	Usage       string
 	EnvVar      string
 	Destination *bool
+	Hidden      bool
 }
 
 // String returns a readable representation of this value (for usage defaults)
 func (f BoolTFlag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -328,6 +400,7 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f BoolTFlag) GetName() string {
 	return f.Name
 }
@@ -339,19 +412,12 @@
 	Usage       string
 	EnvVar      string
 	Destination *string
+	Hidden      bool
 }
 
 // String returns the usage
 func (f StringFlag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name), f.FormatValueHelp(), f.Usage))
-}
-
-func (f StringFlag) FormatValueHelp() string {
-	s := f.Value
-	if len(s) == 0 {
-		return ""
-	}
-	return fmt.Sprintf("\"%s\"", s)
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -375,23 +441,24 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f StringFlag) GetName() string {
 	return f.Name
 }
 
 // IntFlag is a flag that takes an integer
-// Errors if the value provided cannot be parsed
 type IntFlag struct {
 	Name        string
 	Value       int
 	Usage       string
 	EnvVar      string
 	Destination *int
+	Hidden      bool
 }
 
 // String returns the usage
 func (f IntFlag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -418,10 +485,143 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f IntFlag) GetName() string {
 	return f.Name
 }
 
+// Int64Flag is a flag that takes a 64-bit integer
+type Int64Flag struct {
+	Name        string
+	Value       int64
+	Usage       string
+	EnvVar      string
+	Destination *int64
+	Hidden      bool
+}
+
+// String returns the usage
+func (f Int64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f Int64Flag) Apply(set *flag.FlagSet) {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal := os.Getenv(envVar); envVal != "" {
+				envValInt, err := strconv.ParseInt(envVal, 0, 64)
+				if err == nil {
+					f.Value = envValInt
+					break
+				}
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Int64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Int64(name, f.Value, f.Usage)
+	})
+}
+
+// GetName returns the name of the flag.
+func (f Int64Flag) GetName() string {
+	return f.Name
+}
+
+// UintFlag is a flag that takes an unsigned integer
+type UintFlag struct {
+	Name        string
+	Value       uint
+	Usage       string
+	EnvVar      string
+	Destination *uint
+	Hidden      bool
+}
+
+// String returns the usage
+func (f UintFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f UintFlag) Apply(set *flag.FlagSet) {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal := os.Getenv(envVar); envVal != "" {
+				envValInt, err := strconv.ParseUint(envVal, 0, 64)
+				if err == nil {
+					f.Value = uint(envValInt)
+					break
+				}
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.UintVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Uint(name, f.Value, f.Usage)
+	})
+}
+
+// GetName returns the name of the flag.
+func (f UintFlag) GetName() string {
+	return f.Name
+}
+
+// Uint64Flag is a flag that takes an unsigned 64-bit integer
+type Uint64Flag struct {
+	Name        string
+	Value       uint64
+	Usage       string
+	EnvVar      string
+	Destination *uint64
+	Hidden      bool
+}
+
+// String returns the usage
+func (f Uint64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f Uint64Flag) Apply(set *flag.FlagSet) {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal := os.Getenv(envVar); envVal != "" {
+				envValInt, err := strconv.ParseUint(envVal, 0, 64)
+				if err == nil {
+					f.Value = uint64(envValInt)
+					break
+				}
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Uint64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Uint64(name, f.Value, f.Usage)
+	})
+}
+
+// GetName returns the name of the flag.
+func (f Uint64Flag) GetName() string {
+	return f.Name
+}
+
 // DurationFlag is a flag that takes a duration specified in Go's duration
 // format: https://golang.org/pkg/time/#ParseDuration
 type DurationFlag struct {
@@ -430,11 +630,12 @@
 	Usage       string
 	EnvVar      string
 	Destination *time.Duration
+	Hidden      bool
 }
 
 // String returns a readable representation of this value (for usage defaults)
 func (f DurationFlag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -461,23 +662,24 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f DurationFlag) GetName() string {
 	return f.Name
 }
 
 // Float64Flag is a flag that takes an float value
-// Errors if the value provided cannot be parsed
 type Float64Flag struct {
 	Name        string
 	Value       float64
 	Usage       string
 	EnvVar      string
 	Destination *float64
+	Hidden      bool
 }
 
 // String returns the usage
 func (f Float64Flag) String() string {
-	return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
+	return FlagStringer(f)
 }
 
 // Apply populates the flag given the flag set and environment
@@ -503,10 +705,21 @@
 	})
 }
 
+// GetName returns the name of the flag.
 func (f Float64Flag) GetName() string {
 	return f.Name
 }
 
+func visibleFlags(fl []Flag) []Flag {
+	visible := []Flag{}
+	for _, flag := range fl {
+		if !flagValue(flag).FieldByName("Hidden").Bool() {
+			visible = append(visible, flag)
+		}
+	}
+	return visible
+}
+
 func prefixFor(name string) (prefix string) {
 	if len(name) == 1 {
 		prefix = "-"
@@ -517,16 +730,37 @@
 	return
 }
 
-func prefixedNames(fullName string) (prefixed string) {
+// Returns the placeholder, if any, and the unquoted usage string.
+func unquoteUsage(usage string) (string, string) {
+	for i := 0; i < len(usage); i++ {
+		if usage[i] == '`' {
+			for j := i + 1; j < len(usage); j++ {
+				if usage[j] == '`' {
+					name := usage[i+1 : j]
+					usage = usage[:i] + name + usage[j+1:]
+					return name, usage
+				}
+			}
+			break
+		}
+	}
+	return "", usage
+}
+
+func prefixedNames(fullName, placeholder string) string {
+	var prefixed string
 	parts := strings.Split(fullName, ",")
 	for i, name := range parts {
 		name = strings.Trim(name, " ")
 		prefixed += prefixFor(name) + name
+		if placeholder != "" {
+			prefixed += " " + placeholder
+		}
 		if i < len(parts)-1 {
 			prefixed += ", "
 		}
 	}
-	return
+	return prefixed
 }
 
 func withEnvHint(envVar, str string) string {
@@ -544,3 +778,105 @@
 	}
 	return str + envText
 }
+
+func flagValue(f Flag) reflect.Value {
+	fv := reflect.ValueOf(f)
+	for fv.Kind() == reflect.Ptr {
+		fv = reflect.Indirect(fv)
+	}
+	return fv
+}
+
+func stringifyFlag(f Flag) string {
+	fv := flagValue(f)
+
+	switch f.(type) {
+	case IntSliceFlag:
+		return withEnvHint(fv.FieldByName("EnvVar").String(),
+			stringifyIntSliceFlag(f.(IntSliceFlag)))
+	case Int64SliceFlag:
+		return withEnvHint(fv.FieldByName("EnvVar").String(),
+			stringifyInt64SliceFlag(f.(Int64SliceFlag)))
+	case StringSliceFlag:
+		return withEnvHint(fv.FieldByName("EnvVar").String(),
+			stringifyStringSliceFlag(f.(StringSliceFlag)))
+	}
+
+	placeholder, usage := unquoteUsage(fv.FieldByName("Usage").String())
+
+	needsPlaceholder := false
+	defaultValueString := ""
+	val := fv.FieldByName("Value")
+
+	if val.IsValid() {
+		needsPlaceholder = true
+		defaultValueString = fmt.Sprintf(" (default: %v)", val.Interface())
+
+		if val.Kind() == reflect.String && val.String() != "" {
+			defaultValueString = fmt.Sprintf(" (default: %q)", val.String())
+		}
+	}
+
+	if defaultValueString == " (default: )" {
+		defaultValueString = ""
+	}
+
+	if needsPlaceholder && placeholder == "" {
+		placeholder = defaultPlaceholder
+	}
+
+	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultValueString))
+
+	return withEnvHint(fv.FieldByName("EnvVar").String(),
+		fmt.Sprintf("%s\t%s", prefixedNames(fv.FieldByName("Name").String(), placeholder), usageWithDefault))
+}
+
+func stringifyIntSliceFlag(f IntSliceFlag) string {
+	defaultVals := []string{}
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, fmt.Sprintf("%d", i))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Name, defaultVals)
+}
+
+func stringifyInt64SliceFlag(f Int64SliceFlag) string {
+	defaultVals := []string{}
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, fmt.Sprintf("%d", i))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Name, defaultVals)
+}
+
+func stringifyStringSliceFlag(f StringSliceFlag) string {
+	defaultVals := []string{}
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, s := range f.Value.Value() {
+			if len(s) > 0 {
+				defaultVals = append(defaultVals, fmt.Sprintf("%q", s))
+			}
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Name, defaultVals)
+}
+
+func stringifySliceFlag(usage, name string, defaultVals []string) string {
+	placeholder, usage := unquoteUsage(usage)
+	if placeholder == "" {
+		placeholder = defaultPlaceholder
+	}
+
+	defaultVal := ""
+	if len(defaultVals) > 0 {
+		defaultVal = fmt.Sprintf(" (default: %s)", strings.Join(defaultVals, ", "))
+	}
+
+	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultVal))
+	return fmt.Sprintf("%s\t%s", prefixedNames(name, placeholder), usageWithDefault)
+}
diff --git a/vendor/github.com/codegangsta/cli/flag_test.go b/vendor/github.com/codegangsta/cli/flag_test.go
index 3caa70a..a7afcc4 100644
--- a/vendor/github.com/codegangsta/cli/flag_test.go
+++ b/vendor/github.com/codegangsta/cli/flag_test.go
@@ -4,9 +4,10 @@
 	"fmt"
 	"os"
 	"reflect"
+	"runtime"
 	"strings"
 	"testing"
-	"runtime"
+	"time"
 )
 
 var boolFlagTests = []struct {
@@ -18,36 +19,37 @@
 }
 
 func TestBoolFlagHelpOutput(t *testing.T) {
-
 	for _, test := range boolFlagTests {
 		flag := BoolFlag{Name: test.name}
 		output := flag.String()
 
 		if output != test.expected {
-			t.Errorf("%s does not match %s", output, test.expected)
+			t.Errorf("%q does not match %q", output, test.expected)
 		}
 	}
 }
 
 var stringFlagTests = []struct {
 	name     string
+	usage    string
 	value    string
 	expected string
 }{
-	{"help", "", "--help \t"},
-	{"h", "", "-h \t"},
-	{"h", "", "-h \t"},
-	{"test", "Something", "--test \"Something\"\t"},
+	{"foo", "", "", "--foo value\t"},
+	{"f", "", "", "-f value\t"},
+	{"f", "The total `foo` desired", "all", "-f foo\tThe total foo desired (default: \"all\")"},
+	{"test", "", "Something", "--test value\t(default: \"Something\")"},
+	{"config,c", "Load configuration from `FILE`", "", "--config FILE, -c FILE\tLoad configuration from FILE"},
+	{"config,c", "Load configuration from `CONFIG`", "config.json", "--config CONFIG, -c CONFIG\tLoad configuration from CONFIG (default: \"config.json\")"},
 }
 
 func TestStringFlagHelpOutput(t *testing.T) {
-
 	for _, test := range stringFlagTests {
-		flag := StringFlag{Name: test.name, Value: test.value}
+		flag := StringFlag{Name: test.name, Usage: test.usage, Value: test.value}
 		output := flag.String()
 
 		if output != test.expected {
-			t.Errorf("%s does not match %s", output, test.expected)
+			t.Errorf("%q does not match %q", output, test.expected)
 		}
 	}
 }
@@ -64,7 +66,7 @@
 			expectedSuffix = " [%APP_FOO%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%s does not end with" + expectedSuffix, output)
+			t.Errorf("%s does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -74,30 +76,29 @@
 	value    *StringSlice
 	expected string
 }{
-	{"help", func() *StringSlice {
+	{"foo", func() *StringSlice {
 		s := &StringSlice{}
 		s.Set("")
 		return s
-	}(), "--help [--help option --help option]\t"},
-	{"h", func() *StringSlice {
+	}(), "--foo value\t"},
+	{"f", func() *StringSlice {
 		s := &StringSlice{}
 		s.Set("")
 		return s
-	}(), "-h [-h option -h option]\t"},
-	{"h", func() *StringSlice {
+	}(), "-f value\t"},
+	{"f", func() *StringSlice {
 		s := &StringSlice{}
-		s.Set("")
+		s.Set("Lipstick")
 		return s
-	}(), "-h [-h option -h option]\t"},
+	}(), "-f value\t(default: \"Lipstick\")"},
 	{"test", func() *StringSlice {
 		s := &StringSlice{}
 		s.Set("Something")
 		return s
-	}(), "--test [--test option --test option]\t"},
+	}(), "--test value\t(default: \"Something\")"},
 }
 
 func TestStringSliceFlagHelpOutput(t *testing.T) {
-
 	for _, test := range stringSliceFlagTests {
 		flag := StringSliceFlag{Name: test.name, Value: test.value}
 		output := flag.String()
@@ -120,7 +121,7 @@
 			expectedSuffix = " [%APP_QWWX%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%q does not end with" + expectedSuffix, output)
+			t.Errorf("%q does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -129,14 +130,13 @@
 	name     string
 	expected string
 }{
-	{"help", "--help \"0\"\t"},
-	{"h", "-h \"0\"\t"},
+	{"hats", "--hats value\t(default: 9)"},
+	{"H", "-H value\t(default: 9)"},
 }
 
 func TestIntFlagHelpOutput(t *testing.T) {
-
 	for _, test := range intFlagTests {
-		flag := IntFlag{Name: test.name}
+		flag := IntFlag{Name: test.name, Value: 9}
 		output := flag.String()
 
 		if output != test.expected {
@@ -157,7 +157,115 @@
 			expectedSuffix = " [%APP_BAR%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%s does not end with" + expectedSuffix, output)
+			t.Errorf("%s does not end with"+expectedSuffix, output)
+		}
+	}
+}
+
+var int64FlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"hats", "--hats value\t(default: 8589934592)"},
+	{"H", "-H value\t(default: 8589934592)"},
+}
+
+func TestInt64FlagHelpOutput(t *testing.T) {
+	for _, test := range int64FlagTests {
+		flag := Int64Flag{Name: test.name, Value: 8589934592}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestInt64FlagWithEnvVarHelpOutput(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("APP_BAR", "2")
+	for _, test := range int64FlagTests {
+		flag := IntFlag{Name: test.name, EnvVar: "APP_BAR"}
+		output := flag.String()
+
+		expectedSuffix := " [$APP_BAR]"
+		if runtime.GOOS == "windows" {
+			expectedSuffix = " [%APP_BAR%]"
+		}
+		if !strings.HasSuffix(output, expectedSuffix) {
+			t.Errorf("%s does not end with"+expectedSuffix, output)
+		}
+	}
+}
+
+var uintFlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"nerfs", "--nerfs value\t(default: 41)"},
+	{"N", "-N value\t(default: 41)"},
+}
+
+func TestUintFlagHelpOutput(t *testing.T) {
+	for _, test := range uintFlagTests {
+		flag := UintFlag{Name: test.name, Value: 41}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestUintFlagWithEnvVarHelpOutput(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("APP_BAR", "2")
+	for _, test := range uintFlagTests {
+		flag := UintFlag{Name: test.name, EnvVar: "APP_BAR"}
+		output := flag.String()
+
+		expectedSuffix := " [$APP_BAR]"
+		if runtime.GOOS == "windows" {
+			expectedSuffix = " [%APP_BAR%]"
+		}
+		if !strings.HasSuffix(output, expectedSuffix) {
+			t.Errorf("%s does not end with"+expectedSuffix, output)
+		}
+	}
+}
+
+var uint64FlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"gerfs", "--gerfs value\t(default: 8589934582)"},
+	{"G", "-G value\t(default: 8589934582)"},
+}
+
+func TestUint64FlagHelpOutput(t *testing.T) {
+	for _, test := range uint64FlagTests {
+		flag := Uint64Flag{Name: test.name, Value: 8589934582}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestUint64FlagWithEnvVarHelpOutput(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("APP_BAR", "2")
+	for _, test := range uint64FlagTests {
+		flag := UintFlag{Name: test.name, EnvVar: "APP_BAR"}
+		output := flag.String()
+
+		expectedSuffix := " [$APP_BAR]"
+		if runtime.GOOS == "windows" {
+			expectedSuffix = " [%APP_BAR%]"
+		}
+		if !strings.HasSuffix(output, expectedSuffix) {
+			t.Errorf("%s does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -166,18 +274,17 @@
 	name     string
 	expected string
 }{
-	{"help", "--help \"0\"\t"},
-	{"h", "-h \"0\"\t"},
+	{"hooting", "--hooting value\t(default: 1s)"},
+	{"H", "-H value\t(default: 1s)"},
 }
 
 func TestDurationFlagHelpOutput(t *testing.T) {
-
 	for _, test := range durationFlagTests {
-		flag := DurationFlag{Name: test.name}
+		flag := DurationFlag{Name: test.name, Value: 1 * time.Second}
 		output := flag.String()
 
 		if output != test.expected {
-			t.Errorf("%s does not match %s", output, test.expected)
+			t.Errorf("%q does not match %q", output, test.expected)
 		}
 	}
 }
@@ -194,7 +301,7 @@
 			expectedSuffix = " [%APP_BAR%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%s does not end with" + expectedSuffix, output)
+			t.Errorf("%s does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -204,18 +311,17 @@
 	value    *IntSlice
 	expected string
 }{
-	{"help", &IntSlice{}, "--help [--help option --help option]\t"},
-	{"h", &IntSlice{}, "-h [-h option -h option]\t"},
-	{"h", &IntSlice{}, "-h [-h option -h option]\t"},
-	{"test", func() *IntSlice {
+	{"heads", &IntSlice{}, "--heads value\t"},
+	{"H", &IntSlice{}, "-H value\t"},
+	{"H, heads", func() *IntSlice {
 		i := &IntSlice{}
 		i.Set("9")
+		i.Set("3")
 		return i
-	}(), "--test [--test option --test option]\t"},
+	}(), "-H value, --heads value\t(default: 9, 3)"},
 }
 
 func TestIntSliceFlagHelpOutput(t *testing.T) {
-
 	for _, test := range intSliceFlagTests {
 		flag := IntSliceFlag{Name: test.name, Value: test.value}
 		output := flag.String()
@@ -238,7 +344,50 @@
 			expectedSuffix = " [%APP_SMURF%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%q does not end with" + expectedSuffix, output)
+			t.Errorf("%q does not end with"+expectedSuffix, output)
+		}
+	}
+}
+
+var int64SliceFlagTests = []struct {
+	name     string
+	value    *Int64Slice
+	expected string
+}{
+	{"heads", &Int64Slice{}, "--heads value\t"},
+	{"H", &Int64Slice{}, "-H value\t"},
+	{"H, heads", func() *Int64Slice {
+		i := &Int64Slice{}
+		i.Set("2")
+		i.Set("17179869184")
+		return i
+	}(), "-H value, --heads value\t(default: 2, 17179869184)"},
+}
+
+func TestInt64SliceFlagHelpOutput(t *testing.T) {
+	for _, test := range int64SliceFlagTests {
+		flag := Int64SliceFlag{Name: test.name, Value: test.value}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%q does not match %q", output, test.expected)
+		}
+	}
+}
+
+func TestInt64SliceFlagWithEnvVarHelpOutput(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("APP_SMURF", "42,17179869184")
+	for _, test := range int64SliceFlagTests {
+		flag := Int64SliceFlag{Name: test.name, Value: test.value, EnvVar: "APP_SMURF"}
+		output := flag.String()
+
+		expectedSuffix := " [$APP_SMURF]"
+		if runtime.GOOS == "windows" {
+			expectedSuffix = " [%APP_SMURF%]"
+		}
+		if !strings.HasSuffix(output, expectedSuffix) {
+			t.Errorf("%q does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -247,18 +396,17 @@
 	name     string
 	expected string
 }{
-	{"help", "--help \"0\"\t"},
-	{"h", "-h \"0\"\t"},
+	{"hooting", "--hooting value\t(default: 0.1)"},
+	{"H", "-H value\t(default: 0.1)"},
 }
 
 func TestFloat64FlagHelpOutput(t *testing.T) {
-
 	for _, test := range float64FlagTests {
-		flag := Float64Flag{Name: test.name}
+		flag := Float64Flag{Name: test.name, Value: float64(0.1)}
 		output := flag.String()
 
 		if output != test.expected {
-			t.Errorf("%s does not match %s", output, test.expected)
+			t.Errorf("%q does not match %q", output, test.expected)
 		}
 	}
 }
@@ -275,7 +423,7 @@
 			expectedSuffix = " [%APP_BAZ%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%s does not end with" + expectedSuffix, output)
+			t.Errorf("%s does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -285,12 +433,11 @@
 	value    Generic
 	expected string
 }{
-	{"test", &Parser{"abc", "def"}, "--test \"abc,def\"\ttest flag"},
-	{"t", &Parser{"abc", "def"}, "-t \"abc,def\"\ttest flag"},
+	{"toads", &Parser{"abc", "def"}, "--toads value\ttest flag (default: abc,def)"},
+	{"t", &Parser{"abc", "def"}, "-t value\ttest flag (default: abc,def)"},
 }
 
 func TestGenericFlagHelpOutput(t *testing.T) {
-
 	for _, test := range genericFlagTests {
 		flag := GenericFlag{Name: test.name, Value: test.value, Usage: "test flag"}
 		output := flag.String()
@@ -313,7 +460,7 @@
 			expectedSuffix = " [%APP_ZAP%]"
 		}
 		if !strings.HasSuffix(output, expectedSuffix) {
-			t.Errorf("%s does not end with" + expectedSuffix, output)
+			t.Errorf("%s does not end with"+expectedSuffix, output)
 		}
 	}
 }
@@ -323,13 +470,14 @@
 		Flags: []Flag{
 			StringFlag{Name: "serve, s"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.String("serve") != "10" {
 				t.Errorf("main name not set")
 			}
 			if ctx.String("s") != "10" {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}).Run([]string{"run", "-s", "10"})
 }
@@ -343,10 +491,11 @@
 				Destination: &dest,
 			},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if dest != "10" {
 				t.Errorf("expected destination String 10")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--dest", "10"})
@@ -359,13 +508,14 @@
 		Flags: []Flag{
 			StringFlag{Name: "count, c", EnvVar: "APP_COUNT"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.String("count") != "20" {
 				t.Errorf("main name not set")
 			}
 			if ctx.String("c") != "20" {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}).Run([]string{"run"})
 }
@@ -377,13 +527,14 @@
 		Flags: []Flag{
 			StringFlag{Name: "count, c", EnvVar: "COMPAT_COUNT,APP_COUNT"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.String("count") != "20" {
 				t.Errorf("main name not set")
 			}
 			if ctx.String("c") != "20" {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}).Run([]string{"run"})
 }
@@ -393,13 +544,14 @@
 		Flags: []Flag{
 			StringSliceFlag{Name: "serve, s", Value: &StringSlice{}},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.StringSlice("serve"), []string{"10", "20"}) {
 				t.Errorf("main name not set")
 			}
 			if !reflect.DeepEqual(ctx.StringSlice("s"), []string{"10", "20"}) {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}).Run([]string{"run", "-s", "10", "-s", "20"})
 }
@@ -412,13 +564,14 @@
 		Flags: []Flag{
 			StringSliceFlag{Name: "intervals, i", Value: &StringSlice{}, EnvVar: "APP_INTERVALS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.StringSlice("intervals"), []string{"20", "30", "40"}) {
 				t.Errorf("main name not set from env")
 			}
 			if !reflect.DeepEqual(ctx.StringSlice("i"), []string{"20", "30", "40"}) {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}).Run([]string{"run"})
 }
@@ -431,13 +584,14 @@
 		Flags: []Flag{
 			StringSliceFlag{Name: "intervals, i", Value: &StringSlice{}, EnvVar: "COMPAT_INTERVALS,APP_INTERVALS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.StringSlice("intervals"), []string{"20", "30", "40"}) {
 				t.Errorf("main name not set from env")
 			}
 			if !reflect.DeepEqual(ctx.StringSlice("i"), []string{"20", "30", "40"}) {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}).Run([]string{"run"})
 }
@@ -447,13 +601,14 @@
 		Flags: []Flag{
 			IntFlag{Name: "serve, s"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Int("serve") != 10 {
 				t.Errorf("main name not set")
 			}
 			if ctx.Int("s") != 10 {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "-s", "10"})
@@ -468,10 +623,11 @@
 				Destination: &dest,
 			},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if dest != 10 {
 				t.Errorf("expected destination Int 10")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--dest", "10"})
@@ -484,13 +640,14 @@
 		Flags: []Flag{
 			IntFlag{Name: "timeout, t", EnvVar: "APP_TIMEOUT_SECONDS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Int("timeout") != 10 {
 				t.Errorf("main name not set")
 			}
 			if ctx.Int("t") != 10 {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -503,13 +660,14 @@
 		Flags: []Flag{
 			IntFlag{Name: "timeout, t", EnvVar: "COMPAT_TIMEOUT_SECONDS,APP_TIMEOUT_SECONDS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Int("timeout") != 10 {
 				t.Errorf("main name not set")
 			}
 			if ctx.Int("t") != 10 {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -520,13 +678,14 @@
 		Flags: []Flag{
 			IntSliceFlag{Name: "serve, s", Value: &IntSlice{}},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.IntSlice("serve"), []int{10, 20}) {
 				t.Errorf("main name not set")
 			}
 			if !reflect.DeepEqual(ctx.IntSlice("s"), []int{10, 20}) {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}).Run([]string{"run", "-s", "10", "-s", "20"})
 }
@@ -539,13 +698,14 @@
 		Flags: []Flag{
 			IntSliceFlag{Name: "intervals, i", Value: &IntSlice{}, EnvVar: "APP_INTERVALS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.IntSlice("intervals"), []int{20, 30, 40}) {
 				t.Errorf("main name not set from env")
 			}
 			if !reflect.DeepEqual(ctx.IntSlice("i"), []int{20, 30, 40}) {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}).Run([]string{"run"})
 }
@@ -558,13 +718,71 @@
 		Flags: []Flag{
 			IntSliceFlag{Name: "intervals, i", Value: &IntSlice{}, EnvVar: "COMPAT_INTERVALS,APP_INTERVALS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.IntSlice("intervals"), []int{20, 30, 40}) {
 				t.Errorf("main name not set from env")
 			}
 			if !reflect.DeepEqual(ctx.IntSlice("i"), []int{20, 30, 40}) {
 				t.Errorf("short name not set from env")
 			}
+			return nil
+		},
+	}).Run([]string{"run"})
+}
+
+func TestParseMultiInt64Slice(t *testing.T) {
+	(&App{
+		Flags: []Flag{
+			Int64SliceFlag{Name: "serve, s", Value: &Int64Slice{}},
+		},
+		Action: func(ctx *Context) error {
+			if !reflect.DeepEqual(ctx.Int64Slice("serve"), []int64{10, 17179869184}) {
+				t.Errorf("main name not set")
+			}
+			if !reflect.DeepEqual(ctx.Int64Slice("s"), []int64{10, 17179869184}) {
+				t.Errorf("short name not set")
+			}
+			return nil
+		},
+	}).Run([]string{"run", "-s", "10", "-s", "17179869184"})
+}
+
+func TestParseMultiInt64SliceFromEnv(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("APP_INTERVALS", "20,30,17179869184")
+
+	(&App{
+		Flags: []Flag{
+			Int64SliceFlag{Name: "intervals, i", Value: &Int64Slice{}, EnvVar: "APP_INTERVALS"},
+		},
+		Action: func(ctx *Context) error {
+			if !reflect.DeepEqual(ctx.Int64Slice("intervals"), []int64{20, 30, 17179869184}) {
+				t.Errorf("main name not set from env")
+			}
+			if !reflect.DeepEqual(ctx.Int64Slice("i"), []int64{20, 30, 17179869184}) {
+				t.Errorf("short name not set from env")
+			}
+			return nil
+		},
+	}).Run([]string{"run"})
+}
+
+func TestParseMultiInt64SliceFromEnvCascade(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("APP_INTERVALS", "20,30,17179869184")
+
+	(&App{
+		Flags: []Flag{
+			Int64SliceFlag{Name: "intervals, i", Value: &Int64Slice{}, EnvVar: "COMPAT_INTERVALS,APP_INTERVALS"},
+		},
+		Action: func(ctx *Context) error {
+			if !reflect.DeepEqual(ctx.Int64Slice("intervals"), []int64{20, 30, 17179869184}) {
+				t.Errorf("main name not set from env")
+			}
+			if !reflect.DeepEqual(ctx.Int64Slice("i"), []int64{20, 30, 17179869184}) {
+				t.Errorf("short name not set from env")
+			}
+			return nil
 		},
 	}).Run([]string{"run"})
 }
@@ -574,13 +792,14 @@
 		Flags: []Flag{
 			Float64Flag{Name: "serve, s"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Float64("serve") != 10.2 {
 				t.Errorf("main name not set")
 			}
 			if ctx.Float64("s") != 10.2 {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "-s", "10.2"})
@@ -595,10 +814,11 @@
 				Destination: &dest,
 			},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if dest != 10.2 {
 				t.Errorf("expected destination Float64 10.2")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--dest", "10.2"})
@@ -611,13 +831,14 @@
 		Flags: []Flag{
 			Float64Flag{Name: "timeout, t", EnvVar: "APP_TIMEOUT_SECONDS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Float64("timeout") != 15.5 {
 				t.Errorf("main name not set")
 			}
 			if ctx.Float64("t") != 15.5 {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -630,13 +851,14 @@
 		Flags: []Flag{
 			Float64Flag{Name: "timeout, t", EnvVar: "COMPAT_TIMEOUT_SECONDS,APP_TIMEOUT_SECONDS"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Float64("timeout") != 15.5 {
 				t.Errorf("main name not set")
 			}
 			if ctx.Float64("t") != 15.5 {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -647,13 +869,14 @@
 		Flags: []Flag{
 			BoolFlag{Name: "serve, s"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Bool("serve") != true {
 				t.Errorf("main name not set")
 			}
 			if ctx.Bool("s") != true {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--serve"})
@@ -668,10 +891,11 @@
 				Destination: &dest,
 			},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if dest != true {
 				t.Errorf("expected destination Bool true")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--dest"})
@@ -684,13 +908,14 @@
 		Flags: []Flag{
 			BoolFlag{Name: "debug, d", EnvVar: "APP_DEBUG"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Bool("debug") != true {
 				t.Errorf("main name not set from env")
 			}
 			if ctx.Bool("d") != true {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -703,13 +928,14 @@
 		Flags: []Flag{
 			BoolFlag{Name: "debug, d", EnvVar: "COMPAT_DEBUG,APP_DEBUG"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Bool("debug") != true {
 				t.Errorf("main name not set from env")
 			}
 			if ctx.Bool("d") != true {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -720,13 +946,14 @@
 		Flags: []Flag{
 			BoolTFlag{Name: "serve, s"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.BoolT("serve") != true {
 				t.Errorf("main name not set")
 			}
 			if ctx.BoolT("s") != true {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--serve"})
@@ -741,10 +968,11 @@
 				Destination: &dest,
 			},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if dest != true {
 				t.Errorf("expected destination BoolT true")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "--dest"})
@@ -757,13 +985,14 @@
 		Flags: []Flag{
 			BoolTFlag{Name: "debug, d", EnvVar: "APP_DEBUG"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.BoolT("debug") != false {
 				t.Errorf("main name not set from env")
 			}
 			if ctx.BoolT("d") != false {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -776,13 +1005,14 @@
 		Flags: []Flag{
 			BoolTFlag{Name: "debug, d", EnvVar: "COMPAT_DEBUG,APP_DEBUG"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.BoolT("debug") != false {
 				t.Errorf("main name not set from env")
 			}
 			if ctx.BoolT("d") != false {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -811,13 +1041,14 @@
 		Flags: []Flag{
 			GenericFlag{Name: "serve, s", Value: &Parser{}},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.Generic("serve"), &Parser{"10", "20"}) {
 				t.Errorf("main name not set")
 			}
 			if !reflect.DeepEqual(ctx.Generic("s"), &Parser{"10", "20"}) {
 				t.Errorf("short name not set")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run", "-s", "10,20"})
@@ -830,13 +1061,14 @@
 		Flags: []Flag{
 			GenericFlag{Name: "serve, s", Value: &Parser{}, EnvVar: "APP_SERVE"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.Generic("serve"), &Parser{"20", "30"}) {
 				t.Errorf("main name not set from env")
 			}
 			if !reflect.DeepEqual(ctx.Generic("s"), &Parser{"20", "30"}) {
 				t.Errorf("short name not set from env")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
@@ -849,10 +1081,11 @@
 		Flags: []Flag{
 			GenericFlag{Name: "foos", Value: &Parser{}, EnvVar: "COMPAT_FOO,APP_FOO"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if !reflect.DeepEqual(ctx.Generic("foos"), &Parser{"99", "2000"}) {
 				t.Errorf("value not set from env")
 			}
+			return nil
 		},
 	}
 	a.Run([]string{"run"})
diff --git a/vendor/github.com/codegangsta/cli/funcs.go b/vendor/github.com/codegangsta/cli/funcs.go
new file mode 100644
index 0000000..cba5e6c
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/funcs.go
@@ -0,0 +1,28 @@
+package cli
+
+// BashCompleteFunc is an action to execute when the bash-completion flag is set
+type BashCompleteFunc func(*Context)
+
+// BeforeFunc is an action to execute before any subcommands are run, but after
+// the context is ready if a non-nil error is returned, no subcommands are run
+type BeforeFunc func(*Context) error
+
+// AfterFunc is an action to execute after any subcommands are run, but after the
+// subcommand has finished it is run even if Action() panics
+type AfterFunc func(*Context) error
+
+// ActionFunc is the action to execute when no subcommands are specified
+type ActionFunc func(*Context) error
+
+// CommandNotFoundFunc is executed if the proper command cannot be found
+type CommandNotFoundFunc func(*Context, string)
+
+// OnUsageErrorFunc is executed if an usage error occurs. This is useful for displaying
+// customized usage error messages.  This function is able to replace the
+// original error messages.  If this function is not set, the "Incorrect usage"
+// is displayed and the execution is interrupted.
+type OnUsageErrorFunc func(context *Context, err error, isSubcommand bool) error
+
+// FlagStringFunc is used by the help generation to display a flag, which is
+// expected to be a single line.
+type FlagStringFunc func(Flag) string
diff --git a/vendor/github.com/codegangsta/cli/help.go b/vendor/github.com/codegangsta/cli/help.go
index adf157d..0f4cf14 100644
--- a/vendor/github.com/codegangsta/cli/help.go
+++ b/vendor/github.com/codegangsta/cli/help.go
@@ -3,73 +3,74 @@
 import (
 	"fmt"
 	"io"
+	"os"
 	"strings"
 	"text/tabwriter"
 	"text/template"
 )
 
-// The text template for the Default help topic.
+// AppHelpTemplate is the text template for the Default help topic.
 // cli.go uses text/template to render templates. You can
 // render custom help text by setting this variable.
 var AppHelpTemplate = `NAME:
    {{.Name}} - {{.Usage}}
 
 USAGE:
-   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .Flags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
    {{if .Version}}{{if not .HideVersion}}
 VERSION:
    {{.Version}}
    {{end}}{{end}}{{if len .Authors}}
 AUTHOR(S):
-   {{range .Authors}}{{ . }}{{end}}
-   {{end}}{{if .Commands}}
-COMMANDS:{{range .Categories}}{{if .Name}}
-  {{.Name}}{{ ":" }}{{end}}{{range .Commands}}
-    {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
-{{end}}{{end}}{{if .Flags}}
+   {{range .Authors}}{{.}}{{end}}
+   {{end}}{{if .VisibleCommands}}
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{end}}{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
+{{end}}{{end}}{{if .VisibleFlags}}
 GLOBAL OPTIONS:
-   {{range .Flags}}{{.}}
-   {{end}}{{end}}{{if .Copyright }}
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}{{if .Copyright}}
 COPYRIGHT:
    {{.Copyright}}
    {{end}}
 `
 
-// The text template for the command help topic.
+// CommandHelpTemplate is the text template for the command help topic.
 // cli.go uses text/template to render templates. You can
 // render custom help text by setting this variable.
 var CommandHelpTemplate = `NAME:
    {{.HelpName}} - {{.Usage}}
 
 USAGE:
-   {{.HelpName}}{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{if .Category}}
+   {{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{if .Category}}
 
 CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{.Description}}{{end}}{{if .Flags}}
+   {{.Description}}{{end}}{{if .VisibleFlags}}
 
 OPTIONS:
-   {{range .Flags}}{{.}}
-   {{end}}{{ end }}
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
 `
 
-// The text template for the subcommand help topic.
+// SubcommandHelpTemplate is the text template for the subcommand help topic.
 // cli.go uses text/template to render templates. You can
 // render custom help text by setting this variable.
 var SubcommandHelpTemplate = `NAME:
    {{.HelpName}} - {{.Usage}}
 
 USAGE:
-   {{.HelpName}} command{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
+   {{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
 
-COMMANDS:{{range .Categories}}{{if .Name}}
-  {{.Name}}{{ ":" }}{{end}}{{range .Commands}}
-    {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
-{{end}}{{if .Flags}}
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{end}}{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
+{{end}}{{if .VisibleFlags}}
 OPTIONS:
-   {{range .Flags}}{{.}}
+   {{range .VisibleFlags}}{{.}}
    {{end}}{{end}}
 `
 
@@ -78,13 +79,14 @@
 	Aliases:   []string{"h"},
 	Usage:     "Shows a list of commands or help for one command",
 	ArgsUsage: "[command]",
-	Action: func(c *Context) {
+	Action: func(c *Context) error {
 		args := c.Args()
 		if args.Present() {
-			ShowCommandHelp(c, args.First())
-		} else {
-			ShowAppHelp(c)
+			return ShowCommandHelp(c, args.First())
 		}
+
+		ShowAppHelp(c)
+		return nil
 	},
 }
 
@@ -93,65 +95,74 @@
 	Aliases:   []string{"h"},
 	Usage:     "Shows a list of commands or help for one command",
 	ArgsUsage: "[command]",
-	Action: func(c *Context) {
+	Action: func(c *Context) error {
 		args := c.Args()
 		if args.Present() {
-			ShowCommandHelp(c, args.First())
-		} else {
-			ShowSubcommandHelp(c)
+			return ShowCommandHelp(c, args.First())
 		}
+
+		return ShowSubcommandHelp(c)
 	},
 }
 
 // Prints help for the App or Command
 type helpPrinter func(w io.Writer, templ string, data interface{})
 
+// HelpPrinter is a function that writes the help output. If not set a default
+// is used. The function signature is:
+// func(w io.Writer, templ string, data interface{})
 var HelpPrinter helpPrinter = printHelp
 
-// Prints version for the App
+// VersionPrinter prints the version for the App
 var VersionPrinter = printVersion
 
-func ShowAppHelp(c *Context) {
+// ShowAppHelp is an action that displays the help.
+func ShowAppHelp(c *Context) error {
 	HelpPrinter(c.App.Writer, AppHelpTemplate, c.App)
+	return nil
 }
 
-// Prints the list of subcommands as the default app completion method
+// DefaultAppComplete prints the list of subcommands as the default app completion method
 func DefaultAppComplete(c *Context) {
 	for _, command := range c.App.Commands {
+		if command.Hidden {
+			continue
+		}
 		for _, name := range command.Names() {
 			fmt.Fprintln(c.App.Writer, name)
 		}
 	}
 }
 
-// Prints help for the given command
-func ShowCommandHelp(ctx *Context, command string) {
+// ShowCommandHelp prints help for the given command
+func ShowCommandHelp(ctx *Context, command string) error {
 	// show the subcommand help for a command with subcommands
 	if command == "" {
 		HelpPrinter(ctx.App.Writer, SubcommandHelpTemplate, ctx.App)
-		return
+		return nil
 	}
 
 	for _, c := range ctx.App.Commands {
 		if c.HasName(command) {
 			HelpPrinter(ctx.App.Writer, CommandHelpTemplate, c)
-			return
+			return nil
 		}
 	}
 
-	if ctx.App.CommandNotFound != nil {
-		ctx.App.CommandNotFound(ctx, command)
-	} else {
-		fmt.Fprintf(ctx.App.Writer, "No help topic for '%v'\n", command)
+	if ctx.App.CommandNotFound == nil {
+		return NewExitError(fmt.Sprintf("No help topic for '%v'", command), 3)
 	}
+
+	ctx.App.CommandNotFound(ctx, command)
+	return nil
 }
 
-// Prints help for the given subcommand
-func ShowSubcommandHelp(c *Context) {
-	ShowCommandHelp(c, c.Command.Name)
+// ShowSubcommandHelp prints help for the given subcommand
+func ShowSubcommandHelp(c *Context) error {
+	return ShowCommandHelp(c, c.Command.Name)
 }
 
-// Prints the version number of the App
+// ShowVersion prints the version number of the App
 func ShowVersion(c *Context) {
 	VersionPrinter(c)
 }
@@ -160,7 +171,7 @@
 	fmt.Fprintf(c.App.Writer, "%v version %v\n", c.App.Name, c.App.Version)
 }
 
-// Prints the lists of commands within a given context
+// ShowCompletions prints the lists of commands within a given context
 func ShowCompletions(c *Context) {
 	a := c.App
 	if a != nil && a.BashComplete != nil {
@@ -168,7 +179,7 @@
 	}
 }
 
-// Prints the custom completions for a given command
+// ShowCommandCompletions prints the custom completions for a given command
 func ShowCommandCompletions(ctx *Context, command string) {
 	c := ctx.App.Command(command)
 	if c != nil && c.BashComplete != nil {
@@ -181,12 +192,15 @@
 		"join": strings.Join,
 	}
 
-	w := tabwriter.NewWriter(out, 0, 8, 1, '\t', 0)
+	w := tabwriter.NewWriter(out, 1, 8, 2, ' ', 0)
 	t := template.Must(template.New("help").Funcs(funcMap).Parse(templ))
 	err := t.Execute(w, data)
 	if err != nil {
 		// If the writer is closed, t.Execute will fail, and there's nothing
-		// we can do to recover. We could send this to os.Stderr if we need.
+		// we can do to recover.
+		if os.Getenv("CLI_TEMPLATE_ERROR_DEBUG") != "" {
+			fmt.Fprintf(ErrWriter, "CLI TEMPLATE ERROR: %#v\n", err)
+		}
 		return
 	}
 	w.Flush()
diff --git a/vendor/github.com/codegangsta/cli/help_test.go b/vendor/github.com/codegangsta/cli/help_test.go
index 0821f48..7c15400 100644
--- a/vendor/github.com/codegangsta/cli/help_test.go
+++ b/vendor/github.com/codegangsta/cli/help_test.go
@@ -2,6 +2,8 @@
 
 import (
 	"bytes"
+	"flag"
+	"strings"
 	"testing"
 )
 
@@ -66,10 +68,11 @@
 		Flags: []Flag{
 			BoolFlag{Name: "foo, h"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Bool("h") != true {
 				t.Errorf("custom help flag not set")
 			}
+			return nil
 		},
 	}
 	output := new(bytes.Buffer)
@@ -95,10 +98,11 @@
 		Flags: []Flag{
 			BoolFlag{Name: "foo, v"},
 		},
-		Action: func(ctx *Context) {
+		Action: func(ctx *Context) error {
 			if ctx.Bool("v") != true {
 				t.Errorf("custom version flag not set")
 			}
+			return nil
 		},
 	}
 	output := new(bytes.Buffer)
@@ -108,3 +112,178 @@
 		t.Errorf("unexpected output: %s", output.String())
 	}
 }
+
+func Test_helpCommand_Action_ErrorIfNoTopic(t *testing.T) {
+	app := NewApp()
+
+	set := flag.NewFlagSet("test", 0)
+	set.Parse([]string{"foo"})
+
+	c := NewContext(app, set, nil)
+
+	err := helpCommand.Action.(func(*Context) error)(c)
+
+	if err == nil {
+		t.Fatalf("expected error from helpCommand.Action(), but got nil")
+	}
+
+	exitErr, ok := err.(*ExitError)
+	if !ok {
+		t.Fatalf("expected ExitError from helpCommand.Action(), but instead got: %v", err.Error())
+	}
+
+	if !strings.HasPrefix(exitErr.Error(), "No help topic for") {
+		t.Fatalf("expected an unknown help topic error, but got: %v", exitErr.Error())
+	}
+
+	if exitErr.exitCode != 3 {
+		t.Fatalf("expected exit value = 3, got %d instead", exitErr.exitCode)
+	}
+}
+
+func Test_helpCommand_InHelpOutput(t *testing.T) {
+	app := NewApp()
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"test", "--help"})
+
+	s := output.String()
+
+	if strings.Contains(s, "\nCOMMANDS:\nGLOBAL OPTIONS:\n") {
+		t.Fatalf("empty COMMANDS section detected: %q", s)
+	}
+
+	if !strings.Contains(s, "help, h") {
+		t.Fatalf("missing \"help, h\": %q", s)
+	}
+}
+
+func Test_helpSubcommand_Action_ErrorIfNoTopic(t *testing.T) {
+	app := NewApp()
+
+	set := flag.NewFlagSet("test", 0)
+	set.Parse([]string{"foo"})
+
+	c := NewContext(app, set, nil)
+
+	err := helpSubcommand.Action.(func(*Context) error)(c)
+
+	if err == nil {
+		t.Fatalf("expected error from helpCommand.Action(), but got nil")
+	}
+
+	exitErr, ok := err.(*ExitError)
+	if !ok {
+		t.Fatalf("expected ExitError from helpCommand.Action(), but instead got: %v", err.Error())
+	}
+
+	if !strings.HasPrefix(exitErr.Error(), "No help topic for") {
+		t.Fatalf("expected an unknown help topic error, but got: %v", exitErr.Error())
+	}
+
+	if exitErr.exitCode != 3 {
+		t.Fatalf("expected exit value = 3, got %d instead", exitErr.exitCode)
+	}
+}
+
+func TestShowAppHelp_CommandAliases(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name:    "frobbly",
+				Aliases: []string{"fr", "frob"},
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"foo", "--help"})
+
+	if !strings.Contains(output.String(), "frobbly, fr, frob") {
+		t.Errorf("expected output to include all command aliases; got: %q", output.String())
+	}
+}
+
+func TestShowCommandHelp_CommandAliases(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name:    "frobbly",
+				Aliases: []string{"fr", "frob", "bork"},
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"foo", "help", "fr"})
+
+	if !strings.Contains(output.String(), "frobbly") {
+		t.Errorf("expected output to include command name; got: %q", output.String())
+	}
+
+	if strings.Contains(output.String(), "bork") {
+		t.Errorf("expected output to exclude command aliases; got: %q", output.String())
+	}
+}
+
+func TestShowSubcommandHelp_CommandAliases(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name:    "frobbly",
+				Aliases: []string{"fr", "frob", "bork"},
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"foo", "help"})
+
+	if !strings.Contains(output.String(), "frobbly, fr, frob, bork") {
+		t.Errorf("expected output to include all command aliases; got: %q", output.String())
+	}
+}
+
+func TestShowAppHelp_HiddenCommand(t *testing.T) {
+	app := &App{
+		Commands: []Command{
+			{
+				Name: "frobbly",
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+			{
+				Name:   "secretfrob",
+				Hidden: true,
+				Action: func(ctx *Context) error {
+					return nil
+				},
+			},
+		},
+	}
+
+	output := &bytes.Buffer{}
+	app.Writer = output
+	app.Run([]string{"app", "--help"})
+
+	if strings.Contains(output.String(), "secretfrob") {
+		t.Errorf("expected output to exclude \"secretfrob\"; got: %q", output.String())
+	}
+
+	if !strings.Contains(output.String(), "frobbly") {
+		t.Errorf("expected output to include \"frobbly\"; got: %q", output.String())
+	}
+}
diff --git a/vendor/github.com/codegangsta/cli/helpers_test.go b/vendor/github.com/codegangsta/cli/helpers_test.go
index b1b7339..109ea7a 100644
--- a/vendor/github.com/codegangsta/cli/helpers_test.go
+++ b/vendor/github.com/codegangsta/cli/helpers_test.go
@@ -1,14 +1,23 @@
 package cli
 
 import (
+	"os"
 	"reflect"
+	"runtime"
+	"strings"
 	"testing"
 )
 
-/* Test Helpers */
+var (
+	wd, _ = os.Getwd()
+)
+
 func expect(t *testing.T, a interface{}, b interface{}) {
+	_, fn, line, _ := runtime.Caller(1)
+	fn = strings.Replace(fn, wd+"/", "", -1)
+
 	if !reflect.DeepEqual(a, b) {
-		t.Errorf("Expected %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+		t.Errorf("(%s:%d) Expected %v (type %v) - Got %v (type %v)", fn, line, b, reflect.TypeOf(b), a, reflect.TypeOf(a))
 	}
 }
 
diff --git a/vendor/github.com/codegangsta/cli/runtests b/vendor/github.com/codegangsta/cli/runtests
new file mode 100755
index 0000000..0a7b483
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/runtests
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+from __future__ import print_function
+
+import argparse
+import os
+import sys
+import tempfile
+
+from subprocess import check_call, check_output
+
+
+PACKAGE_NAME = os.environ.get(
+    'CLI_PACKAGE_NAME', 'github.com/urfave/cli'
+)
+
+
+def main(sysargs=sys.argv[:]):
+    targets = {
+        'vet': _vet,
+        'test': _test,
+        'gfmxr': _gfmxr,
+        'toc': _toc,
+    }
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        'target', nargs='?', choices=tuple(targets.keys()), default='test'
+    )
+    args = parser.parse_args(sysargs[1:])
+
+    targets[args.target]()
+    return 0
+
+
+def _test():
+    if check_output('go version'.split()).split()[2] < 'go1.2':
+        _run('go test -v .'.split())
+        return
+
+    coverprofiles = []
+    for subpackage in ['', 'altsrc']:
+        coverprofile = 'cli.coverprofile'
+        if subpackage != '':
+            coverprofile = '{}.coverprofile'.format(subpackage)
+
+        coverprofiles.append(coverprofile)
+
+        _run('go test -v'.split() + [
+            '-coverprofile={}'.format(coverprofile),
+            ('{}/{}'.format(PACKAGE_NAME, subpackage)).rstrip('/')
+        ])
+
+    combined_name = _combine_coverprofiles(coverprofiles)
+    _run('go tool cover -func={}'.format(combined_name).split())
+    os.remove(combined_name)
+
+
+def _gfmxr():
+    _run(['gfmxr', '-c', str(_gfmxr_count()), '-s', 'README.md'])
+
+
+def _vet():
+    _run('go vet ./...'.split())
+
+
+def _toc():
+    _run(['node_modules/.bin/markdown-toc', '-i', 'README.md'])
+    _run(['git', 'diff', '--quiet'])
+
+
+def _run(command):
+    print('runtests: {}'.format(' '.join(command)), file=sys.stderr)
+    check_call(command)
+
+
+def _gfmxr_count():
+    with open('README.md') as infile:
+        lines = infile.read().splitlines()
+        return len(filter(_is_go_runnable, lines))
+
+
+def _is_go_runnable(line):
+    return line.startswith('package main')
+
+
+def _combine_coverprofiles(coverprofiles):
+    combined = tempfile.NamedTemporaryFile(
+        suffix='.coverprofile', delete=False
+    )
+    combined.write('mode: set\n')
+
+    for coverprofile in coverprofiles:
+        with open(coverprofile, 'r') as infile:
+            for line in infile.readlines():
+                if not line.startswith('mode: '):
+                    combined.write(line)
+
+    combined.flush()
+    name = combined.name
+    combined.close()
+    return name
+
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/vendor/gopkg.in/yaml.v2/LICENSE b/vendor/gopkg.in/yaml.v2/LICENSE
index a68e67f..866d74a 100644
--- a/vendor/gopkg.in/yaml.v2/LICENSE
+++ b/vendor/gopkg.in/yaml.v2/LICENSE
@@ -1,188 +1,13 @@
+Copyright 2011-2016 Canonical Ltd.
 
-Copyright (c) 2011-2014 - Canonical Inc.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
 
-This software is licensed under the LGPLv3, included below.
+    http://www.apache.org/licenses/LICENSE-2.0
 
-As a special exception to the GNU Lesser General Public License version 3
-("LGPL3"), the copyright holders of this Library give you permission to
-convey to a third party a Combined Work that links statically or dynamically
-to this Library without providing any Minimal Corresponding Source or
-Minimal Application Code as set out in 4d or providing the installation
-information set out in section 4e, provided that you comply with the other
-provisions of LGPL3 and provided that you meet, for the Application the
-terms and conditions of the license(s) which apply to the Application.
-
-Except as stated in this special exception, the provisions of LGPL3 will
-continue to comply in full to this Library. If you modify this Library, you
-may apply this exception to your version of this Library, but you are not
-obliged to do so. If you do not wish to do so, delete this exception
-statement from your version. This exception does not (and cannot) modify any
-license terms which apply to the Application, with which you must still
-comply.
-
-
-                   GNU LESSER GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-
-  This version of the GNU Lesser General Public License incorporates
-the terms and conditions of version 3 of the GNU General Public
-License, supplemented by the additional permissions listed below.
-
-  0. Additional Definitions.
-
-  As used herein, "this License" refers to version 3 of the GNU Lesser
-General Public License, and the "GNU GPL" refers to version 3 of the GNU
-General Public License.
-
-  "The Library" refers to a covered work governed by this License,
-other than an Application or a Combined Work as defined below.
-
-  An "Application" is any work that makes use of an interface provided
-by the Library, but which is not otherwise based on the Library.
-Defining a subclass of a class defined by the Library is deemed a mode
-of using an interface provided by the Library.
-
-  A "Combined Work" is a work produced by combining or linking an
-Application with the Library.  The particular version of the Library
-with which the Combined Work was made is also called the "Linked
-Version".
-
-  The "Minimal Corresponding Source" for a Combined Work means the
-Corresponding Source for the Combined Work, excluding any source code
-for portions of the Combined Work that, considered in isolation, are
-based on the Application, and not on the Linked Version.
-
-  The "Corresponding Application Code" for a Combined Work means the
-object code and/or source code for the Application, including any data
-and utility programs needed for reproducing the Combined Work from the
-Application, but excluding the System Libraries of the Combined Work.
-
-  1. Exception to Section 3 of the GNU GPL.
-
-  You may convey a covered work under sections 3 and 4 of this License
-without being bound by section 3 of the GNU GPL.
-
-  2. Conveying Modified Versions.
-
-  If you modify a copy of the Library, and, in your modifications, a
-facility refers to a function or data to be supplied by an Application
-that uses the facility (other than as an argument passed when the
-facility is invoked), then you may convey a copy of the modified
-version:
-
-   a) under this License, provided that you make a good faith effort to
-   ensure that, in the event an Application does not supply the
-   function or data, the facility still operates, and performs
-   whatever part of its purpose remains meaningful, or
-
-   b) under the GNU GPL, with none of the additional permissions of
-   this License applicable to that copy.
-
-  3. Object Code Incorporating Material from Library Header Files.
-
-  The object code form of an Application may incorporate material from
-a header file that is part of the Library.  You may convey such object
-code under terms of your choice, provided that, if the incorporated
-material is not limited to numerical parameters, data structure
-layouts and accessors, or small macros, inline functions and templates
-(ten or fewer lines in length), you do both of the following:
-
-   a) Give prominent notice with each copy of the object code that the
-   Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the object code with a copy of the GNU GPL and this license
-   document.
-
-  4. Combined Works.
-
-  You may convey a Combined Work under terms of your choice that,
-taken together, effectively do not restrict modification of the
-portions of the Library contained in the Combined Work and reverse
-engineering for debugging such modifications, if you also do each of
-the following:
-
-   a) Give prominent notice with each copy of the Combined Work that
-   the Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the Combined Work with a copy of the GNU GPL and this license
-   document.
-
-   c) For a Combined Work that displays copyright notices during
-   execution, include the copyright notice for the Library among
-   these notices, as well as a reference directing the user to the
-   copies of the GNU GPL and this license document.
-
-   d) Do one of the following:
-
-       0) Convey the Minimal Corresponding Source under the terms of this
-       License, and the Corresponding Application Code in a form
-       suitable for, and under terms that permit, the user to
-       recombine or relink the Application with a modified version of
-       the Linked Version to produce a modified Combined Work, in the
-       manner specified by section 6 of the GNU GPL for conveying
-       Corresponding Source.
-
-       1) Use a suitable shared library mechanism for linking with the
-       Library.  A suitable mechanism is one that (a) uses at run time
-       a copy of the Library already present on the user's computer
-       system, and (b) will operate properly with a modified version
-       of the Library that is interface-compatible with the Linked
-       Version.
-
-   e) Provide Installation Information, but only if you would otherwise
-   be required to provide such information under section 6 of the
-   GNU GPL, and only to the extent that such information is
-   necessary to install and execute a modified version of the
-   Combined Work produced by recombining or relinking the
-   Application with a modified version of the Linked Version. (If
-   you use option 4d0, the Installation Information must accompany
-   the Minimal Corresponding Source and Corresponding Application
-   Code. If you use option 4d1, you must provide the Installation
-   Information in the manner specified by section 6 of the GNU GPL
-   for conveying Corresponding Source.)
-
-  5. Combined Libraries.
-
-  You may place library facilities that are a work based on the
-Library side by side in a single library together with other library
-facilities that are not Applications and are not covered by this
-License, and convey such a combined library under terms of your
-choice, if you do both of the following:
-
-   a) Accompany the combined library with a copy of the same work based
-   on the Library, uncombined with any other library facilities,
-   conveyed under the terms of this License.
-
-   b) Give prominent notice with the combined library that part of it
-   is a work based on the Library, and explaining where to find the
-   accompanying uncombined form of the same work.
-
-  6. Revised Versions of the GNU Lesser General Public License.
-
-  The Free Software Foundation may publish revised and/or new versions
-of the GNU Lesser General Public License from time to time. Such new
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