diff --git a/CHANGELOG.md b/CHANGELOG.md
index 668b25d..beb3356 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,11 @@
 # Release 0.13.0 (unreleased)
 
+## Changed
 - #697: Preserve vendor/.git, if it exists.
 
+## Fixed
+- #736: Find home dir without using cgo (thanks @krancour)
+
 # Release 0.12.3 (2016-10-03)
 
 ## Fixed
diff --git a/glide.lock b/glide.lock
index 2d3fc9c..5a9fee4 100644
--- a/glide.lock
+++ b/glide.lock
@@ -1,12 +1,14 @@
-hash: 67c5571c33bfcb663d32d2b40b9ce1f2a05a3fa2e9f442077277c2782195729c
-updated: 2016-08-11T14:22:17.773372627-04:00
+hash: e36c5a71bd15a6d2f7f795a68b0fbfbd41537ee29aec16e7105bd8fd3ef118ee
+updated: 2017-01-12T13:12:10.704271522-05:00
 imports:
 - name: github.com/codegangsta/cli
-  version: 1efa31f08b9333f1bd4882d61f9d668a70cd902e
+  version: 0bdeddeeb0f650497d603c4ad7b20cfe685682f6
 - name: github.com/Masterminds/semver
-  version: 8d0431362b544d1a3536cca26684828866a7de09
+  version: 59c29afe1a994eacb71c833025ca7acf874bb1da
 - name: github.com/Masterminds/vcs
-  version: fbe9fb6ad5b5f35b3e82a7c21123cfc526cbf895
+  version: 87fca6b9ec721bb38f1e9f2e3c0a36c78f6067d5
+- name: github.com/mitchellh/go-homedir
+  version: b8bc1bf767474819792c23f32d8286a45736f1c6
 - name: gopkg.in/yaml.v2
-  version: e4d366fc3c7938e2958e662b4258c7a89e1f0e3e
+  version: a5b47d31c556af34a302ce5d659e6fea44d90de0
 testImports: []
diff --git a/glide.yaml b/glide.yaml
index f293f35..875506c 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -16,3 +16,4 @@
   version: ^1.16.0
 - package: github.com/Masterminds/semver
   version: ^1.1.1
+- package: github.com/mitchellh/go-homedir
diff --git a/path/path.go b/path/path.go
index 953d851..2181c99 100644
--- a/path/path.go
+++ b/path/path.go
@@ -8,9 +8,10 @@
 	"fmt"
 	"io"
 	"os"
-	"os/user"
 	"path/filepath"
 	"strings"
+
+	"github.com/mitchellh/go-homedir"
 )
 
 // DefaultGlideFile is the default name for the glide.yaml file.
@@ -45,10 +46,8 @@
 		return homeDir
 	}
 
-	// Initialize the default user.
-	u, err := user.Current()
-	if err == nil && u.HomeDir != "" {
-		homeDir = filepath.Join(u.HomeDir, ".glide")
+	if h, err := homedir.Dir(); err != nil {
+		homeDir = filepath.Join(h, ".glide")
 	} else {
 		cwd, err := os.Getwd()
 		if err == nil {
diff --git a/vendor/github.com/Masterminds/semver/.travis.yml b/vendor/github.com/Masterminds/semver/.travis.yml
index 5600ae8..3231840 100644
--- a/vendor/github.com/Masterminds/semver/.travis.yml
+++ b/vendor/github.com/Masterminds/semver/.travis.yml
@@ -1,9 +1,9 @@
 language: go
 
 go:
-  - 1.3
-  - 1.4
   - 1.5
+  - 1.6
+  - 1.7
   - tip
 
 # Setting sudo access to false will let Travis CI use containers rather than
@@ -12,5 +12,14 @@
 # - http://docs.travis-ci.com/user/workers/standard-infrastructure/
 sudo: false
 
+script:
+  - GO15VENDOREXPERIMENT=1 make setup
+  - GO15VENDOREXPERIMENT=1 make test
+
 notifications:
-  irc: "irc.freenode.net#masterminds"
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/06e3328629952dabe3e0
+    on_success: change  # options: [always|never|change] default: always
+    on_failure: always  # options: [always|never|change] default: always
+    on_start: never     # options: [always|never|change] default: always
diff --git a/vendor/github.com/Masterminds/semver/CHANGELOG.md b/vendor/github.com/Masterminds/semver/CHANGELOG.md
index c3808ea..237d53a 100644
--- a/vendor/github.com/Masterminds/semver/CHANGELOG.md
+++ b/vendor/github.com/Masterminds/semver/CHANGELOG.md
@@ -1,3 +1,27 @@
+# Release 1.2.2 (2016-12-13)
+
+## Fixed
+- #34: Fixed issue where hyphen range was not working with pre-release parsing.
+
+# Release 1.2.1 (2016-11-28)
+
+## Fixed
+- #24: Fixed edge case issue where constraint "> 0" does not handle "0.0.1-alpha"
+  properly.
+
+# Release 1.2.0 (2016-11-04)
+
+## Added
+- #20: Added MustParse function for versions (thanks @adamreese)
+- #15: Added increment methods on versions (thanks @mh-cbon)
+
+## Fixed
+- Issue #21: Per the SemVer spec (section 9) a pre-release is unstable and
+  might not satisfy the intended compatibility. The change here ignores pre-releases
+  on constraint checks (e.g., ~ or ^) when a pre-release is not part of the
+  constraint. For example, `^1.2.3` will ignore pre-releases while
+  `^1.2.3-alpha` will include them.
+
 # Release 1.1.1 (2016-06-30)
 
 ## Changed
diff --git a/vendor/github.com/Masterminds/semver/Makefile b/vendor/github.com/Masterminds/semver/Makefile
new file mode 100644
index 0000000..a7a1b4e
--- /dev/null
+++ b/vendor/github.com/Masterminds/semver/Makefile
@@ -0,0 +1,36 @@
+.PHONY: setup
+setup:
+	go get -u gopkg.in/alecthomas/gometalinter.v1
+	gometalinter.v1 --install
+
+.PHONY: test
+test: validate lint
+	@echo "==> Running tests"
+	go test -v
+
+.PHONY: validate
+validate:
+	@echo "==> Running static validations"
+	@gometalinter.v1 \
+	  --disable-all \
+	  --enable deadcode \
+	  --severity deadcode:error \
+	  --enable gofmt \
+	  --enable gosimple \
+	  --enable ineffassign \
+	  --enable misspell \
+	  --enable vet \
+	  --tests \
+	  --vendor \
+	  --deadline 60s \
+	  ./... || exit_code=1
+
+.PHONY: lint
+lint:
+	@echo "==> Running linters"
+	@gometalinter.v1 \
+	  --disable-all \
+	  --enable golint \
+	  --vendor \
+	  --deadline 60s \
+	  ./... || :
diff --git a/vendor/github.com/Masterminds/semver/README.md b/vendor/github.com/Masterminds/semver/README.md
index 1edec7a..9a9ed45 100644
--- a/vendor/github.com/Masterminds/semver/README.md
+++ b/vendor/github.com/Masterminds/semver/README.md
@@ -78,6 +78,15 @@
 * `>=`: greater than or equal to
 * `<=`: less than or equal to
 
+_Note, according to the Semantic Version specification pre-releases may not be
+API compliant with their release counterpart. It says,_
+
+> _A pre-release version indicates that the version is unstable and might not satisfy the intended compatibility requirements as denoted by its associated normal version._
+
+_SemVer comparisons without a pre-release value will skip pre-release versions.
+For example, `>1.2.3` will skip pre-releases when looking at a list of values
+while `>1.2.3-alpha.1` will evaluate pre-releases._
+
 ## Hyphen Range Comparisons
 
 There are multiple methods to handle ranges and the first is hyphens ranges.
diff --git a/vendor/github.com/Masterminds/semver/appveyor.yml b/vendor/github.com/Masterminds/semver/appveyor.yml
index cf7801b..b2778df 100644
--- a/vendor/github.com/Masterminds/semver/appveyor.yml
+++ b/vendor/github.com/Masterminds/semver/appveyor.yml
@@ -12,11 +12,33 @@
 install:
   - go version
   - go env
+  - go get -u gopkg.in/alecthomas/gometalinter.v1
+  - set PATH=%PATH%;%GOPATH%\bin
+  - gometalinter.v1.exe --install
 
 build_script:
   - go install -v ./...
 
 test_script:
+  - "gometalinter.v1 \
+    --disable-all \
+    --enable deadcode \
+    --severity deadcode:error \
+    --enable gofmt \
+    --enable gosimple \
+    --enable ineffassign \
+    --enable misspell \
+    --enable vet \
+    --tests \
+    --vendor \
+    --deadline 60s \
+    ./... || exit_code=1"
+  - "gometalinter.v1 \
+    --disable-all \
+    --enable golint \
+    --vendor \
+    --deadline 60s \
+    ./... || :"
   - go test -v
 
 deploy: off
diff --git a/vendor/github.com/Masterminds/semver/constraints.go b/vendor/github.com/Masterminds/semver/constraints.go
index b63f5f6..4c4fac3 100644
--- a/vendor/github.com/Masterminds/semver/constraints.go
+++ b/vendor/github.com/Masterminds/semver/constraints.go
@@ -129,7 +129,7 @@
 		cvRegex))
 
 	constraintRangeRegex = regexp.MustCompile(fmt.Sprintf(
-		`\s*(%s)\s*-\s*(%s)\s*`,
+		`\s*(%s)\s+-\s+(%s)\s*`,
 		cvRegex, cvRegex))
 }
 
@@ -204,6 +204,14 @@
 // Constraint functions
 func constraintNotEqual(v *Version, c *constraint) bool {
 	if c.dirty {
+
+		// If there is a pre-release on the version but the constraint isn't looking
+		// for them assume that pre-releases are not compatible. See issue 21 for
+		// more details.
+		if v.Prerelease() != "" && c.con.Prerelease() == "" {
+			return false
+		}
+
 		if c.con.Major() != v.Major() {
 			return true
 		}
@@ -220,10 +228,31 @@
 }
 
 func constraintGreaterThan(v *Version, c *constraint) bool {
+
+	// An edge case the constraint is 0.0.0 and the version is 0.0.0-someprerelease
+	// exists. This that case.
+	if !isNonZero(c.con) && isNonZero(v) {
+		return true
+	}
+
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	return v.Compare(c.con) == 1
 }
 
 func constraintLessThan(v *Version, c *constraint) bool {
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	if !c.dirty {
 		return v.Compare(c.con) < 0
 	}
@@ -238,10 +267,30 @@
 }
 
 func constraintGreaterThanEqual(v *Version, c *constraint) bool {
+	// An edge case the constraint is 0.0.0 and the version is 0.0.0-someprerelease
+	// exists. This that case.
+	if !isNonZero(c.con) && isNonZero(v) {
+		return true
+	}
+
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	return v.Compare(c.con) >= 0
 }
 
 func constraintLessThanEqual(v *Version, c *constraint) bool {
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	if !c.dirty {
 		return v.Compare(c.con) <= 0
 	}
@@ -262,6 +311,13 @@
 // ~1.2.3, ~>1.2.3 --> >=1.2.3, <1.3.0
 // ~1.2.0, ~>1.2.0 --> >=1.2.0, <1.3.0
 func constraintTilde(v *Version, c *constraint) bool {
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	if v.LessThan(c.con) {
 		return false
 	}
@@ -286,6 +342,13 @@
 // When there is a .x (dirty) status it automatically opts in to ~. Otherwise
 // it's a straight =
 func constraintTildeOrEqual(v *Version, c *constraint) bool {
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	if c.dirty {
 		c.msg = constraintMsg["~"]
 		return constraintTilde(v, c)
@@ -301,6 +364,13 @@
 // ^1.2.3 --> >=1.2.3, <2.0.0
 // ^1.2.0 --> >=1.2.0, <2.0.0
 func constraintCaret(v *Version, c *constraint) bool {
+	// If there is a pre-release on the version but the constraint isn't looking
+	// for them assume that pre-releases are not compatible. See issue 21 for
+	// more details.
+	if v.Prerelease() != "" && c.con.Prerelease() == "" {
+		return false
+	}
+
 	if v.LessThan(c.con) {
 		return false
 	}
@@ -340,3 +410,12 @@
 
 	return o
 }
+
+// Detect if a version is not zero (0.0.0)
+func isNonZero(v *Version) bool {
+	if v.Major() != 0 || v.Minor() != 0 || v.Patch() != 0 || v.Prerelease() != "" {
+		return true
+	}
+
+	return false
+}
diff --git a/vendor/github.com/Masterminds/semver/constraints_test.go b/vendor/github.com/Masterminds/semver/constraints_test.go
index 6dad455..5910622 100644
--- a/vendor/github.com/Masterminds/semver/constraints_test.go
+++ b/vendor/github.com/Masterminds/semver/constraints_test.go
@@ -72,6 +72,10 @@
 		{"<=1.1", "0.1.0", true},
 		{"<=1.1", "1.1.0", true},
 		{"<=1.1", "1.1.1", false},
+		{">0", "0.0.1-alpha", true},
+		{">=0", "0.0.1-alpha", true},
+		{">0", "0", false},
+		{">=0", "0", true},
 	}
 
 	for _, tc := range tests {
@@ -89,7 +93,7 @@
 
 		a := c.check(v)
 		if a != tc.check {
-			t.Errorf("Constraint '%s' failing", tc.constraint)
+			t.Errorf("Constraint %q failing with %q", tc.constraint, tc.version)
 		}
 	}
 }
@@ -103,12 +107,13 @@
 	}{
 		{">= 1.1", 1, 1, false},
 		{"2.0", 1, 1, false},
+		{"v2.3.5-20161202202307-sha.e8fc5e5", 1, 1, false},
 		{">= bar", 0, 0, true},
 		{">= 1.2.3, < 2.0", 1, 2, false},
 		{">= 1.2.3, < 2.0 || => 3.0, < 4", 2, 2, false},
 
-		// The 3-4 should be broken into 2 by the range rewriting
-		{"3-4 || => 3.0, < 4", 2, 2, false},
+		// The 3 - 4 should be broken into 2 by the range rewriting
+		{"3 - 4 || => 3.0, < 4", 2, 2, false},
 	}
 
 	for _, tc := range tests {
@@ -152,6 +157,8 @@
 		{"4.1.x", "4.1.3", true},
 		{"1.x", "1.4", true},
 		{"!=4.1", "4.1.0", false},
+		{"!=4.1-alpha", "4.1.0-alpha", false},
+		{"!=4.1-alpha", "4.1.0", true},
 		{"!=4.1", "5.1.0", true},
 		{"!=4.x", "5.1.0", true},
 		{"!=4.x", "4.1.0", false},
@@ -168,9 +175,12 @@
 		{"<1.1.x", "1.1.500", true},
 		{"<1.2.x", "1.1.1", true},
 		{">=1.1", "4.1.0", true},
+		{">=1.1", "4.1.0-beta", false},
 		{">=1.1", "1.1.0", true},
 		{">=1.1", "0.0.9", false},
 		{"<=1.1", "0.1.0", true},
+		{"<=1.1", "0.1.0-alpha", false},
+		{"<=1.1-a", "0.1.0-alpha", true},
 		{"<=1.1", "1.1.0", true},
 		{"<=1.x", "1.1.0", true},
 		{"<=2.x", "3.1.0", false},
@@ -190,11 +200,18 @@
 		{"^1.x", "1.1.1", true},
 		{"^2.x", "1.1.1", false},
 		{"^1.x", "2.1.1", false},
+		{"^1.x", "1.1.1-beta1", false},
+		{"^1.1.2-alpha", "1.2.1-beta1", true},
+		{"^1.2.x-alpha", "1.1.1-beta1", false},
 		{"~*", "2.1.1", true},
 		{"~1.x", "2.1.1", false},
 		{"~1.x", "1.3.5", true},
 		{"~1.x", "1.4", true},
 		{"~1.1", "1.1.1", true},
+		{"~1.1", "1.1.1-alpha", false},
+		{"~1.1-alpha", "1.1.1-beta", true},
+		{"~1.1.1-beta", "1.1.1-alpha", false},
+		{"~1.1.1-beta", "1.1.1", true},
 		{"~1.2.3", "1.2.5", true},
 		{"~1.2.3", "1.2.2", false},
 		{"~1.2.3", "1.3.2", false},
@@ -227,9 +244,9 @@
 		c  string
 		nc string
 	}{
-		{"2-3", ">= 2, <= 3"},
-		{"2-3, 2-3", ">= 2, <= 3,>= 2, <= 3"},
-		{"2-3, 4.0.0-5.1", ">= 2, <= 3,>= 4.0.0, <= 5.1"},
+		{"2 - 3", ">= 2, <= 3"},
+		{"2 - 3, 2 - 3", ">= 2, <= 3,>= 2, <= 3"},
+		{"2 - 3, 4.0.0 - 5.1", ">= 2, <= 3,>= 4.0.0, <= 5.1"},
 	}
 
 	for _, tc := range tests {
@@ -309,6 +326,9 @@
 		{"1.1 - 2", "1.1.1", true},
 		{"1.1-3", "4.3.2", false},
 		{"^1.1", "1.1.1", true},
+		{"^1.1", "1.1.1-alpha", false},
+		{"^1.1.1-alpha", "1.1.1-beta", true},
+		{"^1.1.1-beta", "1.1.1-alpha", false},
 		{"^1.1", "4.3.2", false},
 		{"^1.x", "1.1.1", true},
 		{"^2.x", "1.1.1", false},
@@ -316,6 +336,10 @@
 		{"~*", "2.1.1", true},
 		{"~1.x", "2.1.1", false},
 		{"~1.x", "1.3.5", true},
+		{"~1.x", "1.3.5-beta", false},
+		{"~1.3.6-alpha", "1.3.5-beta", false},
+		{"~1.3.5-alpha", "1.3.5-beta", true},
+		{"~1.3.5-beta", "1.3.5-alpha", false},
 		{"~1.x", "1.4", true},
 		{"~1.1", "1.1.1", true},
 		{"~1.2.3", "1.2.5", true},
@@ -341,7 +365,7 @@
 		a, msgs := c.Validate(v)
 		if a != tc.check {
 			t.Errorf("Constraint '%s' failing with '%s'", tc.constraint, tc.version)
-		} else if a == false && len(msgs) == 0 {
+		} else if !a && len(msgs) == 0 {
 			t.Errorf("%q failed with %q but no errors returned", tc.constraint, tc.version)
 		}
 
@@ -395,7 +419,7 @@
 		{">=1.1, <2, !=1.2.3", "1.2.3", "1.2.3 is equal to 1.2.3"},
 		{">=1.1, <2, !=1.2.3 || > 3", "3.0.0", "3.0.0 is greater than or equal to 2"},
 		{">=1.1, <2, !=1.2.3 || > 3", "1.2.3", "1.2.3 is equal to 1.2.3"},
-		{"1.1-3", "4.3.2", "4.3.2 is greater than 3"},
+		{"1.1 - 3", "4.3.2", "4.3.2 is greater than 3"},
 		{"^1.1", "4.3.2", "4.3.2 does not have same major version as 1.1"},
 		{"^2.x", "1.1.1", "1.1.1 does not have same major version as 2.x"},
 		{"^1.x", "2.1.1", "2.1.1 does not have same major version as 1.x"},
diff --git a/vendor/github.com/Masterminds/semver/version.go b/vendor/github.com/Masterminds/semver/version.go
index dbb93f8..28b26ac 100644
--- a/vendor/github.com/Masterminds/semver/version.go
+++ b/vendor/github.com/Masterminds/semver/version.go
@@ -12,18 +12,29 @@
 // The compiled version of the regex created at init() is cached here so it
 // only needs to be created once.
 var versionRegex *regexp.Regexp
+var validPrereleaseRegex *regexp.Regexp
 
 var (
 	// ErrInvalidSemVer is returned a version is found to be invalid when
 	// being parsed.
 	ErrInvalidSemVer = errors.New("Invalid Semantic Version")
+
+	// ErrInvalidMetadata is returned when the metadata is an invalid format
+	ErrInvalidMetadata = errors.New("Invalid Metadata string")
+
+	// ErrInvalidPrerelease is returned when the pre-release is an invalid format
+	ErrInvalidPrerelease = errors.New("Invalid Prerelease string")
 )
 
-// SemVerRegex id the regular expression used to parse a semantic version.
+// SemVerRegex is the regular expression used to parse a semantic version.
 const SemVerRegex string = `v?([0-9]+)(\.[0-9]+)?(\.[0-9]+)?` +
 	`(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
 	`(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?`
 
+// ValidPrerelease is the regular expression which validates
+// both prerelease and metadata values.
+const ValidPrerelease string = `^([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*)`
+
 // Version represents a single semantic version.
 type Version struct {
 	major, minor, patch int64
@@ -34,6 +45,7 @@
 
 func init() {
 	versionRegex = regexp.MustCompile("^" + SemVerRegex + "$")
+	validPrereleaseRegex = regexp.MustCompile(ValidPrerelease)
 }
 
 // NewVersion parses a given version and returns an instance of Version or
@@ -80,6 +92,15 @@
 	return sv, nil
 }
 
+// MustParse parses a given version and panics on error.
+func MustParse(v string) *Version {
+	sv, err := NewVersion(v)
+	if err != nil {
+		panic(err)
+	}
+	return sv
+}
+
 // String converts a Version object to a string.
 // Note, if the original version contained a leading v this version will not.
 // See the Original() method to retrieve the original value. Semantic Versions
@@ -129,6 +150,95 @@
 	return v.metadata
 }
 
+// originalVPrefix returns the original 'v' prefix if any.
+func (v *Version) originalVPrefix() string {
+
+	// Note, only lowercase v is supported as a prefix by the parser.
+	if v.original != "" && v.original[:1] == "v" {
+		return v.original[:1]
+	}
+	return ""
+}
+
+// IncPatch produces the next patch version.
+// If the current version does not have prerelease/metadata information,
+// it unsets metadata and prerelease values, increments patch number.
+// If the current version has any of prerelease or metadata information,
+// it unsets both values and keeps curent patch value
+func (v Version) IncPatch() Version {
+	vNext := v
+	// according to http://semver.org/#spec-item-9
+	// Pre-release versions have a lower precedence than the associated normal version.
+	// according to http://semver.org/#spec-item-10
+	// Build metadata SHOULD be ignored when determining version precedence.
+	if v.pre != "" {
+		vNext.metadata = ""
+		vNext.pre = ""
+	} else {
+		vNext.metadata = ""
+		vNext.pre = ""
+		vNext.patch = v.patch + 1
+	}
+	vNext.original = v.originalVPrefix() + "" + vNext.String()
+	return vNext
+}
+
+// IncMinor produces the next minor version.
+// Sets patch to 0.
+// Increments minor number.
+// Unsets metadata.
+// Unsets prerelease status.
+func (v Version) IncMinor() Version {
+	vNext := v
+	vNext.metadata = ""
+	vNext.pre = ""
+	vNext.patch = 0
+	vNext.minor = v.minor + 1
+	vNext.original = v.originalVPrefix() + "" + vNext.String()
+	return vNext
+}
+
+// IncMajor produces the next major version.
+// Sets patch to 0.
+// Sets minor to 0.
+// Increments major number.
+// Unsets metadata.
+// Unsets prerelease status.
+func (v Version) IncMajor() Version {
+	vNext := v
+	vNext.metadata = ""
+	vNext.pre = ""
+	vNext.patch = 0
+	vNext.minor = 0
+	vNext.major = v.major + 1
+	vNext.original = v.originalVPrefix() + "" + vNext.String()
+	return vNext
+}
+
+// SetPrerelease defines the prerelease value.
+// Value must not include the required 'hypen' prefix.
+func (v Version) SetPrerelease(prerelease string) (Version, error) {
+	vNext := v
+	if len(prerelease) > 0 && !validPrereleaseRegex.MatchString(prerelease) {
+		return vNext, ErrInvalidPrerelease
+	}
+	vNext.pre = prerelease
+	vNext.original = v.originalVPrefix() + "" + vNext.String()
+	return vNext, nil
+}
+
+// SetMetadata defines metadata value.
+// Value must not include the required 'plus' prefix.
+func (v Version) SetMetadata(metadata string) (Version, error) {
+	vNext := v
+	if len(metadata) > 0 && !validPrereleaseRegex.MatchString(metadata) {
+		return vNext, ErrInvalidMetadata
+	}
+	vNext.metadata = metadata
+	vNext.original = v.originalVPrefix() + "" + vNext.String()
+	return vNext, nil
+}
+
 // LessThan tests if one version is less than another one.
 func (v *Version) LessThan(o *Version) bool {
 	return v.Compare(o) < 0
diff --git a/vendor/github.com/Masterminds/semver/version_test.go b/vendor/github.com/Masterminds/semver/version_test.go
index e8ad413..0e02a6a 100644
--- a/vendor/github.com/Masterminds/semver/version_test.go
+++ b/vendor/github.com/Masterminds/semver/version_test.go
@@ -281,3 +281,170 @@
 		}
 	}
 }
+
+func TestInc(t *testing.T) {
+	tests := []struct {
+		v1               string
+		expected         string
+		how              string
+		expectedOriginal string
+	}{
+		{"1.2.3", "1.2.4", "patch", "1.2.4"},
+		{"v1.2.4", "1.2.5", "patch", "v1.2.5"},
+		{"1.2.3", "1.3.0", "minor", "1.3.0"},
+		{"v1.2.4", "1.3.0", "minor", "v1.3.0"},
+		{"1.2.3", "2.0.0", "major", "2.0.0"},
+		{"v1.2.4", "2.0.0", "major", "v2.0.0"},
+		{"1.2.3+meta", "1.2.4", "patch", "1.2.4"},
+		{"1.2.3-beta+meta", "1.2.3", "patch", "1.2.3"},
+		{"v1.2.4-beta+meta", "1.2.4", "patch", "v1.2.4"},
+		{"1.2.3-beta+meta", "1.3.0", "minor", "1.3.0"},
+		{"v1.2.4-beta+meta", "1.3.0", "minor", "v1.3.0"},
+		{"1.2.3-beta+meta", "2.0.0", "major", "2.0.0"},
+		{"v1.2.4-beta+meta", "2.0.0", "major", "v2.0.0"},
+	}
+
+	for _, tc := range tests {
+		v1, err := NewVersion(tc.v1)
+		if err != nil {
+			t.Errorf("Error parsing version: %s", err)
+		}
+
+		var v2 Version
+		switch tc.how {
+		case "patch":
+			v2 = v1.IncPatch()
+		case "minor":
+			v2 = v1.IncMinor()
+		case "major":
+			v2 = v1.IncMajor()
+		}
+
+		a := v2.String()
+		e := tc.expected
+		if a != e {
+			t.Errorf(
+				"Inc %q failed. Expected %q got %q",
+				tc.how, e, a,
+			)
+		}
+
+		a = v2.Original()
+		e = tc.expectedOriginal
+		if a != e {
+			t.Errorf(
+				"Inc %q failed. Expected original %q got %q",
+				tc.how, e, a,
+			)
+		}
+	}
+}
+
+func TestSetPrerelease(t *testing.T) {
+	tests := []struct {
+		v1                 string
+		prerelease         string
+		expectedVersion    string
+		expectedPrerelease string
+		expectedOriginal   string
+		expectedErr        error
+	}{
+		{"1.2.3", "**", "1.2.3", "", "1.2.3", ErrInvalidPrerelease},
+		{"1.2.3", "beta", "1.2.3-beta", "beta", "1.2.3-beta", nil},
+		{"v1.2.4", "beta", "1.2.4-beta", "beta", "v1.2.4-beta", nil},
+	}
+
+	for _, tc := range tests {
+		v1, err := NewVersion(tc.v1)
+		if err != nil {
+			t.Errorf("Error parsing version: %s", err)
+		}
+
+		v2, err := v1.SetPrerelease(tc.prerelease)
+		if err != tc.expectedErr {
+			t.Errorf("Expected to get err=%s, but got err=%s", tc.expectedErr, err)
+		}
+
+		a := v2.Prerelease()
+		e := tc.expectedPrerelease
+		if a != e {
+			t.Errorf("Expected prerelease value=%q, but got %q", e, a)
+		}
+
+		a = v2.String()
+		e = tc.expectedVersion
+		if a != e {
+			t.Errorf("Expected version string=%q, but got %q", e, a)
+		}
+
+		a = v2.Original()
+		e = tc.expectedOriginal
+		if a != e {
+			t.Errorf("Expected version original=%q, but got %q", e, a)
+		}
+	}
+}
+
+func TestSetMetadata(t *testing.T) {
+	tests := []struct {
+		v1               string
+		metadata         string
+		expectedVersion  string
+		expectedMetadata string
+		expectedOriginal string
+		expectedErr      error
+	}{
+		{"1.2.3", "**", "1.2.3", "", "1.2.3", ErrInvalidMetadata},
+		{"1.2.3", "meta", "1.2.3+meta", "meta", "1.2.3+meta", nil},
+		{"v1.2.4", "meta", "1.2.4+meta", "meta", "v1.2.4+meta", nil},
+	}
+
+	for _, tc := range tests {
+		v1, err := NewVersion(tc.v1)
+		if err != nil {
+			t.Errorf("Error parsing version: %s", err)
+		}
+
+		v2, err := v1.SetMetadata(tc.metadata)
+		if err != tc.expectedErr {
+			t.Errorf("Expected to get err=%s, but got err=%s", tc.expectedErr, err)
+		}
+
+		a := v2.Metadata()
+		e := tc.expectedMetadata
+		if a != e {
+			t.Errorf("Expected metadata value=%q, but got %q", e, a)
+		}
+
+		a = v2.String()
+		e = tc.expectedVersion
+		if e != a {
+			t.Errorf("Expected version string=%q, but got %q", e, a)
+		}
+
+		a = v2.Original()
+		e = tc.expectedOriginal
+		if a != e {
+			t.Errorf("Expected version original=%q, but got %q", e, a)
+		}
+	}
+}
+
+func TestOriginalVPrefix(t *testing.T) {
+	tests := []struct {
+		version string
+		vprefix string
+	}{
+		{"1.2.3", ""},
+		{"v1.2.4", "v"},
+	}
+
+	for _, tc := range tests {
+		v1, _ := NewVersion(tc.version)
+		a := v1.originalVPrefix()
+		e := tc.vprefix
+		if a != e {
+			t.Errorf("Expected vprefix=%q, but got %q", e, a)
+		}
+	}
+}
diff --git a/vendor/github.com/Masterminds/vcs/.travis.yml b/vendor/github.com/Masterminds/vcs/.travis.yml
index 5c50c4a..b14aeb8 100644
--- a/vendor/github.com/Masterminds/vcs/.travis.yml
+++ b/vendor/github.com/Masterminds/vcs/.travis.yml
@@ -1,10 +1,9 @@
 language: go
 
 go:
-  - 1.3
-  - 1.4
   - 1.5
   - 1.6
+  - 1.7
   - tip
 
 before_script:
@@ -17,6 +16,10 @@
 # - http://docs.travis-ci.com/user/workers/standard-infrastructure/
 sudo: false
 
+script:
+  - GO15VENDOREXPERIMENT=1 make setup
+  - GO15VENDOREXPERIMENT=1 make test
+
 notifications:
   webhooks:
     urls:
diff --git a/vendor/github.com/Masterminds/vcs/CHANGELOG.md b/vendor/github.com/Masterminds/vcs/CHANGELOG.md
index 6362674..4379d3f 100644
--- a/vendor/github.com/Masterminds/vcs/CHANGELOG.md
+++ b/vendor/github.com/Masterminds/vcs/CHANGELOG.md
@@ -1,3 +1,22 @@
+# 1.10.0 (2017-01-09)
+
+## Added
+- #60: Handle Git submodules (thanks @sdboyer)
+- #61: Add gometalinter to testing
+
+# 1.9.0 (2016-11-18)
+
+## Added
+- #50: Auto-detect remotes with file:// prefix.
+- #59: Testing against Go 1.7
+
+## Changed
+- Removed auto-detection for Google Code as the service is deprecated
+- Added auto-detection of git.openstack.org
+
+## Fixed
+- #53: Git not fetching tags off branch
+
 # 1.8.0 (2016-06-29)
 
 ## Added
diff --git a/vendor/github.com/Masterminds/vcs/Makefile b/vendor/github.com/Masterminds/vcs/Makefile
new file mode 100644
index 0000000..5d722c2
--- /dev/null
+++ b/vendor/github.com/Masterminds/vcs/Makefile
@@ -0,0 +1,41 @@
+.PHONY: setup
+setup:
+	go get -u gopkg.in/alecthomas/gometalinter.v1
+	gometalinter.v1 --install
+
+.PHONY: test
+test: validate lint
+	@echo "==> Running tests"
+	go test -v
+
+.PHONY: validate
+validate:
+# misspell finds the work adresář (used in bzr.go) as a mispelling of
+# address. It finds adres. An issue has been filed at
+# https://github.com/client9/misspell/issues/99. In the meantime adding
+# adres to the ignore list.
+	@echo "==> Running static validations"
+	@gometalinter.v1 \
+	  --disable-all \
+	  --linter "misspell:misspell -i adres -j 1 {path}/*.go:PATH:LINE:COL:MESSAGE" \
+	  --enable deadcode \
+	  --severity deadcode:error \
+	  --enable gofmt \
+	  --enable gosimple \
+	  --enable ineffassign \
+	  --enable misspell \
+	  --enable vet \
+	  --tests \
+	  --vendor \
+	  --deadline 60s \
+	  ./... || exit_code=1
+
+.PHONY: lint
+lint:
+	@echo "==> Running linters"
+	@gometalinter.v1 \
+	  --disable-all \
+	  --enable golint \
+	  --vendor \
+	  --deadline 60s \
+	  ./... || :
diff --git a/vendor/github.com/Masterminds/vcs/bzr.go b/vendor/github.com/Masterminds/vcs/bzr.go
index e8f55b6..8343d3c 100644
--- a/vendor/github.com/Masterminds/vcs/bzr.go
+++ b/vendor/github.com/Masterminds/vcs/bzr.go
@@ -39,7 +39,7 @@
 	// http://bazaar.launchpad.net/~mattfarina/govcstestbzrrepo/trunk/. Notice
 	// the change from https to http and the path chance.
 	// Here we set the remote to be the local one if none is passed in.
-	if err == nil && r.CheckLocal() == true && remote == "" {
+	if err == nil && r.CheckLocal() && remote == "" {
 		c := exec.Command("bzr", "info")
 		c.Dir = local
 		c.Env = envForDir(c.Dir)
@@ -226,11 +226,7 @@
 // commit id or tag.
 func (s *BzrRepo) IsReference(r string) bool {
 	_, err := s.RunFromDir("bzr", "revno", "-r", r)
-	if err == nil {
-		return true
-	}
-
-	return false
+	return err == nil
 }
 
 // IsDirty returns if the checkout has been modified from the checked
@@ -308,21 +304,14 @@
 			// an error is returned. Launchpad returns a 404 for a codebase that
 			// does not exist. Otherwise it returns a JSON object describing it.
 			_, er := get("https://api.launchpad.net/1.0/" + try)
-			if er == nil {
-				return true
-			}
-			return false
+			return er == nil
 		}
 	}
 
 	// This is the same command that Go itself uses but it's not fast (or fast
 	// enough by my standards). A faster method would be useful.
 	_, err = s.run("bzr", "info", s.Remote())
-	if err != nil {
-		return false
-	}
-
-	return true
+	return err == nil
 }
 
 // ExportDir exports the current revision to the passed in directory.
@@ -340,6 +329,7 @@
 // https://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/files/head:/po/
 func (s *BzrRepo) isUnableToCreateDir(err error) bool {
 	msg := err.Error()
+
 	if strings.HasPrefix(msg, fmt.Sprintf("Parent directory of %s does not exist.", s.LocalPath())) ||
 		strings.HasPrefix(msg, fmt.Sprintf("Nadřazený adresář %s neexistuje.", s.LocalPath())) ||
 		strings.HasPrefix(msg, fmt.Sprintf("El directorio padre de %s no existe.", s.LocalPath())) ||
diff --git a/vendor/github.com/Masterminds/vcs/bzr_test.go b/vendor/github.com/Masterminds/vcs/bzr_test.go
index e12c6d3..385fd18 100644
--- a/vendor/github.com/Masterminds/vcs/bzr_test.go
+++ b/vendor/github.com/Masterminds/vcs/bzr_test.go
@@ -55,7 +55,7 @@
 	}
 
 	// Verify Bzr repo is a Bzr repo
-	if repo.CheckLocal() == false {
+	if !repo.CheckLocal() {
 		t.Error("Problem checking out repo or Bzr CheckLocal is not working")
 	}
 
@@ -75,7 +75,7 @@
 		t.Error(nrerr)
 	}
 	// Verify the right oject is returned. It will check the local repo type.
-	if nrepo.CheckLocal() == false {
+	if !nrepo.CheckLocal() {
 		t.Error("Wrong version returned from NewRepo")
 	}
 
@@ -164,15 +164,15 @@
 		t.Error("Bzr is incorrectly returning branches")
 	}
 
-	if repo.IsReference("1.0.0") != true {
+	if !repo.IsReference("1.0.0") {
 		t.Error("Bzr is reporting a reference is not one")
 	}
 
-	if repo.IsReference("foo") == true {
-		t.Error("Bzr is reporting a non-existant reference is one")
+	if repo.IsReference("foo") {
+		t.Error("Bzr is reporting a non-existent reference is one")
 	}
 
-	if repo.IsDirty() == true {
+	if repo.IsDirty() {
 		t.Error("Bzr incorrectly reporting dirty")
 	}
 
@@ -227,7 +227,7 @@
 
 	_, err = os.Stat(filepath.Join(exportDir, string(repo.Vcs())))
 	if err != nil {
-		if found := os.IsNotExist(err); found == false {
+		if found := os.IsNotExist(err); !found {
 			t.Errorf("Error checking exported metadata in Bzr: %s", err)
 		}
 	} else {
@@ -250,7 +250,7 @@
 	}()
 
 	repo, _ := NewBzrRepo("", tempDir)
-	if repo.CheckLocal() == true {
+	if repo.CheckLocal() {
 		t.Error("Bzr CheckLocal does not identify non-Bzr location")
 	}
 
diff --git a/vendor/github.com/Masterminds/vcs/errors.go b/vendor/github.com/Masterminds/vcs/errors.go
index ea8c5fc..be70970 100644
--- a/vendor/github.com/Masterminds/vcs/errors.go
+++ b/vendor/github.com/Masterminds/vcs/errors.go
@@ -5,7 +5,7 @@
 // The vcs package provides ways to work with errors that hide the underlying
 // implementation details but make them accessible if needed. For basic errors
 // that do not have underlying implementation specific details or the underlying
-// details are likely not necessairy there are errors for comparison.
+// details are not necessary there are errors for comparison.
 //
 // For example:
 //
diff --git a/vendor/github.com/Masterminds/vcs/git.go b/vendor/github.com/Masterminds/vcs/git.go
index eb4b86e..dcf6278 100644
--- a/vendor/github.com/Masterminds/vcs/git.go
+++ b/vendor/github.com/Masterminds/vcs/git.go
@@ -33,7 +33,7 @@
 
 	// Make sure the local Git repo is configured the same as the remote when
 	// A remote value was passed in.
-	if err == nil && r.CheckLocal() == true {
+	if err == nil && r.CheckLocal() {
 		c := exec.Command("git", "config", "--get", "remote.origin.url")
 		c.Dir = local
 		c.Env = envForDir(c.Dir)
@@ -70,7 +70,7 @@
 
 // Get is used to perform an initial clone of a repository.
 func (s *GitRepo) Get() error {
-	out, err := s.run("git", "clone", s.Remote(), s.LocalPath())
+	out, err := s.run("git", "clone", "--recursive", s.Remote(), s.LocalPath())
 
 	// There are some windows cases where Git cannot create the parent directory,
 	// if it does not already exist, to the location it's trying to create the
@@ -131,7 +131,7 @@
 // Update performs an Git fetch and pull to an existing checkout.
 func (s *GitRepo) Update() error {
 	// Perform a fetch to make sure everything is up to date.
-	out, err := s.RunFromDir("git", "fetch", s.RemoteLocation)
+	out, err := s.RunFromDir("git", "fetch", "--tags", s.RemoteLocation)
 	if err != nil {
 		return NewRemoteError("Unable to update repository", err, string(out))
 	}
@@ -143,7 +143,7 @@
 		return NewLocalError("Unable to update repository", err, "")
 	}
 
-	if detached == true {
+	if detached {
 		return nil
 	}
 
@@ -151,7 +151,8 @@
 	if err != nil {
 		return NewRemoteError("Unable to update repository", err, string(out))
 	}
-	return nil
+
+	return s.defendAgainstSubmodules()
 }
 
 // UpdateVersion sets the version of a package currently checked out via Git.
@@ -160,6 +161,30 @@
 	if err != nil {
 		return NewLocalError("Unable to update checked out version", err, string(out))
 	}
+
+	return s.defendAgainstSubmodules()
+}
+
+// defendAgainstSubmodules tries to keep repo state sane in the event of
+// submodules. Or nested submodules. What a great idea, submodules.
+func (s *GitRepo) defendAgainstSubmodules() error {
+	// First, update them to whatever they should be, if there should happen to be any.
+	out, err := s.RunFromDir("git", "submodule", "update", "--init", "--recursive")
+	if err != nil {
+		return NewLocalError("Unexpected error while defensively updating submodules", err, string(out))
+	}
+	// Now, do a special extra-aggressive clean in case changing versions caused
+	// one or more submodules to go away.
+	out, err = s.RunFromDir("git", "clean", "-x", "-d", "-f", "-f")
+	if err != nil {
+		return NewLocalError("Unexpected error while defensively cleaning up after possible derelict submodule directories", err, string(out))
+	}
+	// Then, repeat just in case there are any nested submodules that went away.
+	out, err = s.RunFromDir("git", "submodule", "foreach", "--recursive", "git", "clean", "-x", "-d", "-f", "-f")
+	if err != nil {
+		return NewLocalError("Unexpected error while defensively cleaning up after possible derelict nested submodule directories", err, string(out))
+	}
+
 	return nil
 }
 
@@ -255,11 +280,7 @@
 	// not been checked out yet. This next step should pickup the other
 	// possible references.
 	_, err = s.RunFromDir("git", "show-ref", r)
-	if err == nil {
-		return true
-	}
-
-	return false
+	return err == nil
 }
 
 // IsDirty returns if the checkout has been modified from the checked
@@ -339,11 +360,7 @@
 	// remote needs to be different.
 	c.Env = mergeEnvLists([]string{"GIT_TERMINAL_PROMPT=0"}, os.Environ())
 	_, err := c.CombinedOutput()
-	if err != nil {
-		return false
-	}
-
-	return true
+	return err == nil
 }
 
 // ExportDir exports the current revision to the passed in directory.
@@ -359,6 +376,12 @@
 	if err != nil {
 		return NewLocalError("Unable to export source", err, string(out))
 	}
+	// and now, the horror of submodules
+	out, err = s.RunFromDir("git", "submodule", "foreach", "--recursive", "'git checkout-index -f -a --prefix=\""+filepath.Join(dir, "$path")+"\"'")
+	s.log(out)
+	if err != nil {
+		return NewLocalError("Error while exporting submodule sources", err, string(out))
+	}
 
 	return nil
 }
diff --git a/vendor/github.com/Masterminds/vcs/git_test.go b/vendor/github.com/Masterminds/vcs/git_test.go
index 80eae55..7c6e093 100644
--- a/vendor/github.com/Masterminds/vcs/git_test.go
+++ b/vendor/github.com/Masterminds/vcs/git_test.go
@@ -1,6 +1,7 @@
 package vcs
 
 import (
+	"fmt"
 	"io/ioutil"
 	"path/filepath"
 	"time"
@@ -53,7 +54,7 @@
 	}
 
 	// Verify Git repo is a Git repo
-	if repo.CheckLocal() == false {
+	if !repo.CheckLocal() {
 		t.Error("Problem checking out repo or Git CheckLocal is not working")
 	}
 
@@ -73,7 +74,7 @@
 		t.Error(nrerr)
 	}
 	// Verify the right oject is returned. It will check the local repo type.
-	if nrepo.CheckLocal() == false {
+	if !nrepo.CheckLocal() {
 		t.Error("Wrong version returned from NewRepo")
 	}
 
@@ -153,8 +154,23 @@
 	if err != nil {
 		t.Error(err)
 	}
-	if tags[0] != "1.0.0" {
-		t.Error("Git tags is not reporting the correct version")
+
+	var hasRelTag bool
+	var hasOffMasterTag bool
+
+	for _, tv := range tags {
+		if tv == "1.0.0" {
+			hasRelTag = true
+		} else if tv == "off-master-tag" {
+			hasOffMasterTag = true
+		}
+	}
+
+	if !hasRelTag {
+		t.Error("Git tags unable to find release tag on master")
+	}
+	if !hasOffMasterTag {
+		t.Error("Git tags did not fetch tags not on master")
 	}
 
 	tags, err = repo.TagsFromCommit("74dd547545b7df4aa285bcec1b54e2b76f726395")
@@ -177,20 +193,20 @@
 	if err != nil {
 		t.Error(err)
 	}
-	// The branches should be HEAD, master, and test.
-	if branches[2] != "test" {
+	// The branches should be HEAD, master, other, and test.
+	if branches[3] != "test" {
 		t.Error("Git is incorrectly returning branches")
 	}
 
-	if repo.IsReference("1.0.0") != true {
+	if !repo.IsReference("1.0.0") {
 		t.Error("Git is reporting a reference is not one")
 	}
 
-	if repo.IsReference("foo") == true {
-		t.Error("Git is reporting a non-existant reference is one")
+	if repo.IsReference("foo") {
+		t.Error("Git is reporting a non-existent reference is one")
 	}
 
-	if repo.IsDirty() == true {
+	if repo.IsDirty() {
 		t.Error("Git incorrectly reporting dirty")
 	}
 
@@ -245,7 +261,7 @@
 
 	_, err = os.Stat(filepath.Join(exportDir, string(repo.Vcs())))
 	if err != nil {
-		if found := os.IsNotExist(err); found == false {
+		if found := os.IsNotExist(err); !found {
 			t.Errorf("Error checking exported metadata in Git: %s", err)
 		}
 	} else {
@@ -268,7 +284,7 @@
 	}()
 
 	repo, _ := NewGitRepo("", tempDir)
-	if repo.CheckLocal() == true {
+	if repo.CheckLocal() {
 		t.Error("Git CheckLocal does not identify non-Git location")
 	}
 
@@ -341,3 +357,128 @@
 		t.Error(err)
 	}
 }
+
+func TestGitSubmoduleHandling(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "go-vcs-git-submodule-tests")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		err = os.RemoveAll(tempDir)
+		if err != nil {
+			t.Error(err)
+		}
+	}()
+
+	dumplocal := func(err error) string {
+		if terr, ok := err.(*LocalError); ok {
+			return fmt.Sprintf("msg: %s\norig: %s\nout: %s", terr.Error(), terr.Original(), terr.Out())
+		}
+		return err.Error()
+	}
+
+	subdirExists := func(dir ...string) bool {
+		_, err := os.Stat(filepath.Join(append([]string{tempDir}, dir...)...))
+		return err == nil
+	}
+
+	// Initial clone should get version with two submodules, each of which have
+	// their own submodule
+	repo, err := NewGitRepo("https://github.com/sdboyer/subm", tempDir)
+	if err != nil {
+		t.Fatal(dumplocal(err))
+	}
+	err = repo.Get()
+	if err != nil {
+		t.Fatalf("unable to clone Git repo. Err was %s", dumplocal(err))
+	}
+
+	// Verify we are on the right version.
+	v, err := repo.Version()
+	if v != "18e3a5f6fc7f6d577e732e7a5ab2caf990efbf8f" {
+		t.Fatalf("did not start from expected rev, tests could fail - bailing out (got %s)", v)
+	}
+	if err != nil {
+		t.Fatal(dumplocal(err))
+	}
+
+	if !subdirExists("subm1", ".git") {
+		t.Fatal("subm1 submodule does not exist on initial clone/checkout")
+	}
+	if !subdirExists("subm1", "dep-test", ".git") {
+		t.Fatal("dep-test submodule nested under subm1 does not exist on initial clone/checkout")
+	}
+
+	if !subdirExists("subm-again", ".git") {
+		t.Fatal("subm-again submodule does not exist on initial clone/checkout")
+	}
+	if !subdirExists("subm-again", "dep-test", ".git") {
+		t.Fatal("dep-test submodule nested under subm-again does not exist on initial clone/checkout")
+	}
+
+	// Now switch to version with no submodules, make sure they all go away
+	err = repo.UpdateVersion("e677f82015f72ac1c8fafa66b5463163b3597af2")
+	if err != nil {
+		t.Fatalf("checking out needed version failed with err: %s", dumplocal(err))
+	}
+
+	if subdirExists("subm1") {
+		t.Fatal("checking out version without submodule did not clean up immediate submodules")
+	}
+	if subdirExists("subm1", "dep-test") {
+		t.Fatal("checking out version without submodule did not clean up nested submodules")
+	}
+	if subdirExists("subm-again") {
+		t.Fatal("checking out version without submodule did not clean up immediate submodules")
+	}
+	if subdirExists("subm-again", "dep-test") {
+		t.Fatal("checking out version without submodule did not clean up nested submodules")
+	}
+
+	err = repo.UpdateVersion("aaf7aa1bc4c3c682cc530eca8f80417088ee8540")
+	if err != nil {
+		t.Fatalf("checking out needed version failed with err: %s", dumplocal(err))
+	}
+
+	if !subdirExists("subm1", ".git") {
+		t.Fatal("checking out version with immediate submodule did not set up git subrepo")
+	}
+
+	err = repo.UpdateVersion("6cc4669af468f3b4f16e7e96275ad01ade5b522f")
+	if err != nil {
+		t.Fatalf("checking out needed version failed with err: %s", dumplocal(err))
+	}
+
+	if !subdirExists("subm1", "dep-test", ".git") {
+		t.Fatal("checking out version with nested submodule did not set up nested git subrepo")
+	}
+
+	err = repo.UpdateVersion("aaf7aa1bc4c3c682cc530eca8f80417088ee8540")
+	if err != nil {
+		t.Fatalf("checking out needed version failed with err: %s", dumplocal(err))
+	}
+
+	if subdirExists("subm1", "dep-test") {
+		t.Fatal("rolling back to version without nested submodule did not clean up the nested submodule")
+	}
+
+	err = repo.UpdateVersion("18e3a5f6fc7f6d577e732e7a5ab2caf990efbf8f")
+	if err != nil {
+		t.Fatalf("checking out needed version failed with err: %s", dumplocal(err))
+	}
+
+	if !subdirExists("subm1", ".git") {
+		t.Fatal("subm1 submodule does not exist after switch from other commit")
+	}
+	if !subdirExists("subm1", "dep-test", ".git") {
+		t.Fatal("dep-test submodule nested under subm1 does not exist after switch from other commit")
+	}
+
+	if !subdirExists("subm-again", ".git") {
+		t.Fatal("subm-again submodule does not exist after switch from other commit")
+	}
+	if !subdirExists("subm-again", "dep-test", ".git") {
+		t.Fatal("dep-test submodule nested under subm-again does not exist after switch from other commit")
+	}
+
+}
diff --git a/vendor/github.com/Masterminds/vcs/hg.go b/vendor/github.com/Masterminds/vcs/hg.go
index df41cd6..5000a6d 100644
--- a/vendor/github.com/Masterminds/vcs/hg.go
+++ b/vendor/github.com/Masterminds/vcs/hg.go
@@ -32,7 +32,7 @@
 
 	// Make sure the local Hg repo is configured the same as the remote when
 	// A remote value was passed in.
-	if err == nil && r.CheckLocal() == true {
+	if err == nil && r.CheckLocal() {
 		// An Hg repo was found so test that the URL there matches
 		// the repo passed in here.
 		c := exec.Command("hg", "paths")
@@ -207,11 +207,7 @@
 // commit id, branch, or tag.
 func (s *HgRepo) IsReference(r string) bool {
 	_, err := s.RunFromDir("hg", "log", "-r", r)
-	if err == nil {
-		return true
-	}
-
-	return false
+	return err == nil
 }
 
 // IsDirty returns if the checkout has been modified from the checked
@@ -305,11 +301,7 @@
 // Ping returns if remote location is accessible.
 func (s *HgRepo) Ping() bool {
 	_, err := s.run("hg", "identify", s.Remote())
-	if err != nil {
-		return false
-	}
-
-	return true
+	return err == nil
 }
 
 // ExportDir exports the current revision to the passed in directory.
diff --git a/vendor/github.com/Masterminds/vcs/hg_test.go b/vendor/github.com/Masterminds/vcs/hg_test.go
index b8aa39a..6b19f72 100644
--- a/vendor/github.com/Masterminds/vcs/hg_test.go
+++ b/vendor/github.com/Masterminds/vcs/hg_test.go
@@ -55,7 +55,7 @@
 	}
 
 	// Verify Hg repo is a Hg repo
-	if repo.CheckLocal() == false {
+	if !repo.CheckLocal() {
 		t.Error("Problem checking out repo or Hg CheckLocal is not working")
 	}
 
@@ -75,7 +75,7 @@
 		t.Error(nrerr)
 	}
 	// Verify the right oject is returned. It will check the local repo type.
-	if nrepo.CheckLocal() == false {
+	if !nrepo.CheckLocal() {
 		t.Error("Wrong version returned from NewRepo")
 	}
 
@@ -166,19 +166,19 @@
 		t.Error("Hg is incorrectly returning branches")
 	}
 
-	if repo.IsReference("1.0.0") != true {
+	if !repo.IsReference("1.0.0") {
 		t.Error("Hg is reporting a reference is not one")
 	}
 
-	if repo.IsReference("test") != true {
+	if !repo.IsReference("test") {
 		t.Error("Hg is reporting a reference is not one")
 	}
 
-	if repo.IsReference("foo") == true {
-		t.Error("Hg is reporting a non-existant reference is one")
+	if repo.IsReference("foo") {
+		t.Error("Hg is reporting a non-existent reference is one")
 	}
 
-	if repo.IsDirty() == true {
+	if repo.IsDirty() {
 		t.Error("Hg incorrectly reporting dirty")
 	}
 
@@ -231,7 +231,7 @@
 
 	_, err = os.Stat(filepath.Join(exportDir, string(repo.Vcs())))
 	if err != nil {
-		if found := os.IsNotExist(err); found == false {
+		if found := os.IsNotExist(err); !found {
 			t.Errorf("Error checking exported metadata in Hg: %s", err)
 		}
 	} else {
@@ -254,7 +254,7 @@
 	}()
 
 	repo, _ := NewHgRepo("", tempDir)
-	if repo.CheckLocal() == true {
+	if repo.CheckLocal() {
 		t.Error("Hg CheckLocal does not identify non-Hg location")
 	}
 
diff --git a/vendor/github.com/Masterminds/vcs/repo_test.go b/vendor/github.com/Masterminds/vcs/repo_test.go
index d61f6cb..fef0bcb 100644
--- a/vendor/github.com/Masterminds/vcs/repo_test.go
+++ b/vendor/github.com/Masterminds/vcs/repo_test.go
@@ -63,12 +63,12 @@
 
 func TestDepInstalled(t *testing.T) {
 	i := depInstalled("git")
-	if i != true {
+	if !i {
 		t.Error("depInstalled not finding installed dep.")
 	}
 
 	i = depInstalled("thisreallyisntinstalled")
-	if i != false {
+	if i {
 		t.Error("depInstalled finding not installed dep.")
 	}
 }
diff --git a/vendor/github.com/Masterminds/vcs/svn.go b/vendor/github.com/Masterminds/vcs/svn.go
index 888ae09..895f93e 100644
--- a/vendor/github.com/Masterminds/vcs/svn.go
+++ b/vendor/github.com/Masterminds/vcs/svn.go
@@ -33,7 +33,7 @@
 
 	// Make sure the local SVN repo is configured the same as the remote when
 	// A remote value was passed in.
-	if err == nil && r.CheckLocal() == true {
+	if err == nil && r.CheckLocal() {
 		// An SVN repo was found so test that the URL there matches
 		// the repo passed in here.
 		out, err := exec.Command("svn", "info", local).CombinedOutput()
@@ -139,6 +139,9 @@
 	}
 
 	out, err := s.RunFromDir("svn", "info", "--xml")
+	if err != nil {
+		return "", NewLocalError("Unable to retrieve checked out version", err, string(out))
+	}
 	s.log(out)
 	infos := &Info{}
 	err = xml.Unmarshal(out, &infos)
@@ -261,6 +264,9 @@
 		}
 
 		out, err := s.RunFromDir("svn", "info", "-r", id, "--xml")
+		if err != nil {
+			return nil, NewLocalError("Unable to retrieve commit information", err, string(out))
+		}
 		infos := &Info{}
 		err = xml.Unmarshal(out, &infos)
 		if err != nil {
@@ -323,11 +329,7 @@
 // Ping returns if remote location is accessible.
 func (s *SvnRepo) Ping() bool {
 	_, err := s.run("svn", "--non-interactive", "info", s.Remote())
-	if err != nil {
-		return false
-	}
-
-	return true
+	return err == nil
 }
 
 // ExportDir exports the current revision to the passed in directory.
@@ -346,11 +348,7 @@
 // where the parent directory of the VCS local path doesn't exist.
 func (s *SvnRepo) isUnableToCreateDir(err error) bool {
 	msg := err.Error()
-	if strings.HasPrefix(msg, "E000002") {
-		return true
-	}
-
-	return false
+	return strings.HasPrefix(msg, "E000002")
 }
 
 // detectRemoteFromInfoCommand finds the remote url from the `svn info`
diff --git a/vendor/github.com/Masterminds/vcs/svn_test.go b/vendor/github.com/Masterminds/vcs/svn_test.go
index d242f3e..dfa0af8 100644
--- a/vendor/github.com/Masterminds/vcs/svn_test.go
+++ b/vendor/github.com/Masterminds/vcs/svn_test.go
@@ -54,7 +54,7 @@
 	}
 
 	// Verify SVN repo is a SVN repo
-	if repo.CheckLocal() == false {
+	if !repo.CheckLocal() {
 		t.Error("Problem checking out repo or SVN CheckLocal is not working")
 	}
 
@@ -167,15 +167,15 @@
 		t.Error("Svn is incorrectly returning branches")
 	}
 
-	if repo.IsReference("r4") != true {
+	if !repo.IsReference("r4") {
 		t.Error("Svn is reporting a reference is not one")
 	}
 
-	if repo.IsReference("55") == true {
-		t.Error("Svn is reporting a non-existant reference is one")
+	if repo.IsReference("55") {
+		t.Error("Svn is reporting a non-existent reference is one")
 	}
 
-	if repo.IsDirty() == true {
+	if repo.IsDirty() {
 		t.Error("Svn incorrectly reporting dirty")
 	}
 
@@ -230,7 +230,7 @@
 
 	_, err = os.Stat(filepath.Join(exportDir, string(repo.Vcs())))
 	if err != nil {
-		if found := os.IsNotExist(err); found == false {
+		if found := os.IsNotExist(err); !found {
 			t.Errorf("Error checking exported metadata in Svn: %s", err)
 		}
 	} else {
@@ -253,7 +253,7 @@
 	}()
 
 	repo, _ := NewSvnRepo("", tempDir)
-	if repo.CheckLocal() == true {
+	if repo.CheckLocal() {
 		t.Error("SVN CheckLocal does not identify non-SVN location")
 	}
 
diff --git a/vendor/github.com/Masterminds/vcs/vcs_local_lookup.go b/vendor/github.com/Masterminds/vcs/vcs_local_lookup.go
index f965132..0709f61 100644
--- a/vendor/github.com/Masterminds/vcs/vcs_local_lookup.go
+++ b/vendor/github.com/Masterminds/vcs/vcs_local_lookup.go
@@ -15,20 +15,20 @@
 		return "", ErrCannotDetectVCS
 	}
 
-	seperator := string(os.PathSeparator)
+	separator := string(os.PathSeparator)
 
 	// Walk through each of the different VCS types to see if
 	// one can be detected. Do this is order of guessed popularity.
-	if _, err := os.Stat(vcsPath + seperator + ".git"); err == nil {
+	if _, err := os.Stat(vcsPath + separator + ".git"); err == nil {
 		return Git, nil
 	}
-	if _, err := os.Stat(vcsPath + seperator + ".svn"); err == nil {
+	if _, err := os.Stat(vcsPath + separator + ".svn"); err == nil {
 		return Svn, nil
 	}
-	if _, err := os.Stat(vcsPath + seperator + ".hg"); err == nil {
+	if _, err := os.Stat(vcsPath + separator + ".hg"); err == nil {
 		return Hg, nil
 	}
-	if _, err := os.Stat(vcsPath + seperator + ".bzr"); err == nil {
+	if _, err := os.Stat(vcsPath + separator + ".bzr"); err == nil {
 		return Bzr, nil
 	}
 
diff --git a/vendor/github.com/Masterminds/vcs/vcs_remote_lookup.go b/vendor/github.com/Masterminds/vcs/vcs_remote_lookup.go
index 0567af8..6689f95 100644
--- a/vendor/github.com/Masterminds/vcs/vcs_remote_lookup.go
+++ b/vendor/github.com/Masterminds/vcs/vcs_remote_lookup.go
@@ -55,16 +55,10 @@
 		vcs:     Git,
 		pattern: `^(go\.googlesource\.com/[A-Za-z0-9_.\-]+/?)$`,
 	},
-	// TODO: Once Google Code becomes fully deprecated this can be removed.
 	{
-		host:     "code.google.com",
-		addCheck: checkGoogle,
-		pattern:  `^(code\.google\.com/[pr]/(?P<project>[a-z0-9\-]+)(\.(?P<repo>[a-z0-9\-]+))?)(/[A-Za-z0-9_.\-]+)*$`,
-	},
-	// Alternative Google setup. This is the previous structure but it still works... until Google Code goes away.
-	{
-		addCheck: checkURL,
-		pattern:  `^([a-z0-9_\-.]+)\.googlecode\.com/(?P<type>git|hg|svn)(/.*)?$`,
+		host:    "git.openstack.org",
+		vcs:     Git,
+		pattern: `^(git\.openstack\.org/[A-Za-z0-9_.\-]+/[A-Za-z0-9_.\-]+)$`,
 	},
 	// If none of the previous detect the type they will fall to this looking for the type in a generic sense
 	// by the extension to the path.
@@ -158,6 +152,11 @@
 		}
 	}
 
+	// Detect file schemes
+	if u.Scheme == "file" {
+		return DetectVcsFromFS(u.Path)
+	}
+
 	if u.Host == "" {
 		return "", ErrCannotDetectVCS
 	}
@@ -267,37 +266,6 @@
 
 }
 
-// Google supports Git, Hg, and Svn. The SVN style is only
-// supported through their legacy setup at <project>.googlecode.com.
-// I wonder if anyone is actually using SVN support.
-func checkGoogle(i map[string]string, u *url.URL) (Type, error) {
-
-	// To figure out which of the VCS types is used in Google Code you need
-	// to parse a web page and find it. Ugh. I mean... ugh.
-	var hack = regexp.MustCompile(`id="checkoutcmd">(hg|git|svn)`)
-
-	d, err := get(expand(i, "https://code.google.com/p/{project}/source/checkout?repo={repo}"))
-	if err != nil {
-		return "", err
-	}
-
-	if m := hack.FindSubmatch(d); m != nil {
-		if vcs := string(m[1]); vcs != "" {
-			if vcs == "svn" {
-				// While Google supports SVN it can only be used with the legacy
-				// urls of <project>.googlecode.com. I considered creating a new
-				// error for this problem but Google Code is going away and there
-				// is support for the legacy structure.
-				return "", ErrCannotDetectVCS
-			}
-
-			return Type(vcs), nil
-		}
-	}
-
-	return "", ErrCannotDetectVCS
-}
-
 // Expect a type key on i with the exact type detected from the regex.
 func checkURL(i map[string]string, u *url.URL) (Type, error) {
 	return Type(i["type"]), nil
diff --git a/vendor/github.com/Masterminds/vcs/vcs_remote_lookup_test.go b/vendor/github.com/Masterminds/vcs/vcs_remote_lookup_test.go
index e97bba8..395ee79 100644
--- a/vendor/github.com/Masterminds/vcs/vcs_remote_lookup_test.go
+++ b/vendor/github.com/Masterminds/vcs/vcs_remote_lookup_test.go
@@ -1,6 +1,9 @@
 package vcs
 
 import (
+	"io/ioutil"
+	"os"
+	"os/exec"
 	"strings"
 	"testing"
 )
@@ -24,8 +27,6 @@
 		"https://hub.jazz.net/git/user1/pkgname":                           {work: true, t: Git},
 		"https://hub.jazz.net/git/user1/pkgname/subpkg/subpkg/subpkg":      {work: true, t: Git},
 		"https://hubs.jazz.net/git/user1/pkgname":                          {work: false, t: Git},
-		"http://farbtastic.googlecode.com/svn/":                            {work: true, t: Svn},
-		"http://farbtastic.googlecode.com/svn/trunk":                       {work: true, t: Svn},
 		"https://example.com/foo/bar.git":                                  {work: true, t: Git},
 		"https://example.com/foo/bar.svn":                                  {work: true, t: Svn},
 		"https://example.com/foo/bar/baz.bzr":                              {work: true, t: Bzr},
@@ -33,6 +34,7 @@
 		"https://gopkg.in/tomb.v1":                                         {work: true, t: Git},
 		"https://golang.org/x/net":                                         {work: true, t: Git},
 		"https://speter.net/go/exp/math/dec/inf":                           {work: true, t: Git},
+		"https://git.openstack.org/foo/bar":                                {work: true, t: Git},
 		"git@github.com:Masterminds/vcs.git":                               {work: true, t: Git},
 		"git@example.com:foo.git":                                          {work: true, t: Git},
 		"ssh://hg@bitbucket.org/mattfarina/testhgrepo":                     {work: true, t: Hg},
@@ -47,15 +49,15 @@
 
 	for u, c := range urlList {
 		ty, _, err := detectVcsFromRemote(u)
-		if err == nil && c.work == false {
+		if err == nil && !c.work {
 			t.Errorf("Error detecting VCS from URL(%s)", u)
 		}
 
-		if err == ErrCannotDetectVCS && c.work == true {
+		if err == ErrCannotDetectVCS && c.work {
 			t.Errorf("Error detecting VCS from URL(%s)", u)
 		}
 
-		if err != nil && c.work == true {
+		if err != nil && c.work {
 			t.Errorf("Error detecting VCS from URL(%s): %s", u, err)
 		}
 
@@ -63,16 +65,45 @@
 			err != ErrCannotDetectVCS &&
 			!strings.HasSuffix(err.Error(), "Not Found") &&
 			!strings.HasSuffix(err.Error(), "Access Denied") &&
-			c.work == false {
+			!c.work {
 			t.Errorf("Unexpected error returned (%s): %s", u, err)
 		}
 
-		if c.work == true && ty != c.t {
+		if c.work && ty != c.t {
 			t.Errorf("Incorrect VCS type returned(%s)", u)
 		}
 	}
 }
 
+func TestVCSFileLookup(t *testing.T) {
+	tempDir, err := ioutil.TempDir("", "go-vcs-file-lookup-tests")
+	if err != nil {
+		t.Error(err)
+	}
+	defer func() {
+		err = os.RemoveAll(tempDir)
+		if err != nil {
+			t.Error(err)
+		}
+	}()
+
+	_, err = exec.Command("git", "init", tempDir).CombinedOutput()
+	if err != nil {
+		t.Error(err)
+	}
+
+	pth := "file://" + tempDir
+	ty, _, err := detectVcsFromRemote(pth)
+
+	if err != nil {
+		t.Errorf("Unable to detect file:// path: %s", err)
+	}
+
+	if ty != Git {
+		t.Errorf("Detected wrong type from file:// path. Found type %v", ty)
+	}
+}
+
 func TestNotFound(t *testing.T) {
 	_, _, err := detectVcsFromRemote("https://mattfarina.com/notfound")
 	if err == nil || !strings.HasSuffix(err.Error(), " Not Found") {
diff --git a/vendor/github.com/codegangsta/cli/.travis.yml b/vendor/github.com/codegangsta/cli/.travis.yml
index 273d017..94836d7 100644
--- a/vendor/github.com/codegangsta/cli/.travis.yml
+++ b/vendor/github.com/codegangsta/cli/.travis.yml
@@ -7,34 +7,33 @@
   - node_modules
 
 go:
-- 1.2.2
-- 1.3.3
-- 1.4
-- 1.5.4
-- 1.6.2
+- 1.2.x
+- 1.3.x
+- 1.4.2
+- 1.5.x
+- 1.6.x
+- 1.7.x
 - master
 
 matrix:
   allow_failures:
   - go: master
   include:
-  - go: 1.6.2
+  - go: 1.6.x
     os: osx
-  - go: 1.1.2
-    install: go get -v .
-    before_script: echo skipping gfmxr on $TRAVIS_GO_VERSION
-    script:
-    - ./runtests vet
-    - ./runtests test
+  - go: 1.7.x
+    os: osx
 
 before_script:
-- go get github.com/urfave/gfmxr/...
+- go get github.com/urfave/gfmrun/... || true
+- go get golang.org/x/tools/... || true
 - if [ ! -f node_modules/.bin/markdown-toc ] ; then
     npm install markdown-toc ;
   fi
 
 script:
+- ./runtests gen
 - ./runtests vet
 - ./runtests test
-- ./runtests gfmxr
+- ./runtests gfmrun
 - ./runtests toc
diff --git a/vendor/github.com/codegangsta/cli/CHANGELOG.md b/vendor/github.com/codegangsta/cli/CHANGELOG.md
index d1904fe..07f7546 100644
--- a/vendor/github.com/codegangsta/cli/CHANGELOG.md
+++ b/vendor/github.com/codegangsta/cli/CHANGELOG.md
@@ -4,6 +4,61 @@
 
 ## [Unreleased]
 
+## [1.19.1] - 2016-11-21
+
+### Fixed
+
+- Fixes regression introduced in 1.19.0 where using an `ActionFunc` as
+  the `Action` for a command would cause it to error rather than calling the
+  function. Should not have a affected declarative cases using `func(c
+  *cli.Context) err)`.
+- Shell completion now handles the case where the user specifies
+  `--generate-bash-completion` immediately after a flag that takes an argument.
+  Previously it call the application with `--generate-bash-completion` as the
+  flag value.
+
+## [1.19.0] - 2016-11-19
+### Added
+- `FlagsByName` was added to make it easy to sort flags (e.g. `sort.Sort(cli.FlagsByName(app.Flags))`)
+- A `Description` field was added to `App` for a more detailed description of
+  the application (similar to the existing `Description` field on `Command`)
+- Flag type code generation via `go generate`
+- Write to stderr and exit 1 if action returns non-nil error
+- Added support for TOML to the `altsrc` loader
+- `SkipArgReorder` was added to allow users to skip the argument reordering.
+  This is useful if you want to consider all "flags" after an argument as
+  arguments rather than flags (the default behavior of the stdlib `flag`
+  library). This is backported functionality from the [removal of the flag
+  reordering](https://github.com/urfave/cli/pull/398) in the unreleased version
+  2
+- For formatted errors (those implementing `ErrorFormatter`), the errors will
+  be formatted during output. Compatible with `pkg/errors`.
+
+### Changed
+- Raise minimum tested/supported Go version to 1.2+
+
+### Fixed
+- Consider empty environment variables as set (previously environment variables
+  with the equivalent of `""` would be skipped rather than their value used).
+- Return an error if the value in a given environment variable cannot be parsed
+  as the flag type. Previously these errors were silently swallowed.
+- Print full error when an invalid flag is specified (which includes the invalid flag)
+- `App.Writer` defaults to `stdout` when `nil`
+- If no action is specified on a command or app, the help is now printed instead of `panic`ing
+- `App.Metadata` is initialized automatically now (previously was `nil` unless initialized)
+- Correctly show help message if `-h` is provided to a subcommand
+- `context.(Global)IsSet` now respects environment variables. Previously it
+  would return `false` if a flag was specified in the environment rather than
+  as an argument
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
+- `altsrc`s import paths were updated to use `gopkg.in/urfave/cli.v1`. This
+  fixes issues that occurred when `gopkg.in/urfave/cli.v1` was imported as well
+  as `altsrc` where Go would complain that the types didn't match
+
+## [1.18.1] - 2016-08-28
+### Fixed
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user (backported)
+
 ## [1.18.0] - 2016-06-27
 ### Added
 - `./runtests` test runner with coverage tracking by default
@@ -22,6 +77,10 @@
 - No longer swallows `panic`s that occur within the `Action`s themselves when
   detecting the signature of the `Action` field
 
+## [1.17.1] - 2016-08-28
+### Fixed
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
+
 ## [1.17.0] - 2016-05-09
 ### Added
 - Pluggable flag-level help text rendering via `cli.DefaultFlagStringFunc`
@@ -43,6 +102,10 @@
 - cleanups based on [Go Report Card
   feedback](https://goreportcard.com/report/github.com/urfave/cli)
 
+## [1.16.1] - 2016-08-28
+### Fixed
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
+
 ## [1.16.0] - 2016-05-02
 ### Added
 - `Hidden` field on all flag struct types to omit from generated help text
diff --git a/vendor/github.com/codegangsta/cli/README.md b/vendor/github.com/codegangsta/cli/README.md
index ebb1d74..bb5f61e 100644
--- a/vendor/github.com/codegangsta/cli/README.md
+++ b/vendor/github.com/codegangsta/cli/README.md
@@ -23,15 +23,16 @@
 - [Installation](#installation)
   * [Supported platforms](#supported-platforms)
   * [Using the `v2` branch](#using-the-v2-branch)
-  * [Pinning to the `v1` branch](#pinning-to-the-v1-branch)
+  * [Pinning to the `v1` releases](#pinning-to-the-v1-releases)
 - [Getting Started](#getting-started)
 - [Examples](#examples)
   * [Arguments](#arguments)
   * [Flags](#flags)
     + [Placeholder Values](#placeholder-values)
     + [Alternate Names](#alternate-names)
+    + [Ordering](#ordering)
     + [Values from the Environment](#values-from-the-environment)
-    + [Values from alternate input sources (YAML and others)](#values-from-alternate-input-sources-yaml-and-others)
+    + [Values from alternate input sources (YAML, TOML, and others)](#values-from-alternate-input-sources-yaml-toml-and-others)
   * [Subcommands](#subcommands)
   * [Subcommands categories](#subcommands-categories)
   * [Exit code](#exit-code)
@@ -60,18 +61,16 @@
 
 ## Installation
 
-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).
+Make sure you have a working Go environment.  Go version 1.2+ is supported.  [See
+the install instructions for Go](http://golang.org/doc/install.html).
 
 To install cli, simply run:
 ```
 $ go get github.com/urfave/cli
 ```
 
-Make sure your `PATH` includes to the `$GOPATH/bin` directory so your commands
-can be easily used:
+Make sure your `PATH` includes the `$GOPATH/bin` directory so your commands can
+be easily used:
 ```
 export PATH=$PATH:$GOPATH/bin
 ```
@@ -106,11 +105,11 @@
 ...
 ```
 
-### Pinning to the `v1` branch
+### Pinning to the `v1` releases
 
 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.:
+pinning to `v1` is an acceptable option, e.g.:
 
 ```
 $ go get gopkg.in/urfave/cli.v1
@@ -124,6 +123,8 @@
 ...
 ```
 
+This will pull the latest tagged `v1` release (e.g. `v1.18.1` at the time of writing).
+
 ## Getting Started
 
 One of the philosophies behind cli is that an API should be playful and full of
@@ -450,6 +451,56 @@
 giving two different forms of the same flag in the same command invocation is an
 error.
 
+#### Ordering
+
+Flags for the application and commands are shown in the order they are defined.
+However, it's possible to sort them from outside this library by using `FlagsByName`
+with `sort`.
+
+For example this:
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "Load configuration from FILE\n.*Language for the greeting.*"
+} -->
+``` go
+package main
+
+import (
+  "os"
+  "sort"
+
+  "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",
+    },
+    cli.StringFlag{
+      Name: "config, c",
+      Usage: "Load configuration from `FILE`",
+    },
+  }
+
+  sort.Sort(cli.FlagsByName(app.Flags))
+
+  app.Run(os.Args)
+}
+```
+
+Will result in help output like:
+
+```
+--config FILE, -c FILE  Load configuration from FILE
+--lang value, -l value  Language for the greeting (default: "english")
+```
+
 #### Values from the Environment
 
 You can also have the default value set from the environment via `EnvVar`.  e.g.
@@ -515,10 +566,14 @@
 }
 ```
 
-#### Values from alternate input sources (YAML and others)
+#### Values from alternate input sources (YAML, TOML, and others)
 
 There is a separate package altsrc that adds support for getting flag values
-from other input sources like YAML.
+from other file input sources.
+
+Currently supported input source formats:
+* YAML
+* TOML
 
 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:
@@ -540,9 +595,9 @@
 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 the aboved specified formats 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:
 
@@ -845,7 +900,7 @@
 
 ### Generated Help Text
 
-The default help flag (`-h/--help`) is defined as `cli.HelpFlag` and is checked 
+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.
 
@@ -950,12 +1005,12 @@
 
 #### Customization
 
-The default flag may be cusomized to something other than `-v/--version` by
+The default flag may be customized to something other than `-v/--version` by
 setting `cli.VersionFlag`, e.g.:
 
 <!-- {
   "args": ["&#45;&#45print-version"],
-  "output": "partay version v19\\.99\\.0"
+  "output": "partay version 19\\.99\\.0"
 } -->
 ``` go
 package main
@@ -974,7 +1029,7 @@
 
   app := cli.NewApp()
   app.Name = "partay"
-  app.Version = "v19.99.0"
+  app.Version = "19.99.0"
   app.Run(os.Args)
 }
 ```
@@ -983,7 +1038,7 @@
 
 <!-- {
   "args": ["&#45;&#45version"],
-  "output": "version=v19\\.99\\.0 revision=fafafaf"
+  "output": "version=19\\.99\\.0 revision=fafafaf"
 } -->
 ``` go
 package main
@@ -1006,7 +1061,7 @@
 
   app := cli.NewApp()
   app.Name = "partay"
-  app.Version = "v19.99.0"
+  app.Version = "19.99.0"
   app.Run(os.Args)
 }
 ```
@@ -1085,7 +1140,7 @@
 func main() {
   app := cli.NewApp()
   app.Name = "kənˈtrīv"
-  app.Version = "v19.99.0"
+  app.Version = "19.99.0"
   app.Compiled = time.Now()
   app.Authors = []cli.Author{
     cli.Author{
diff --git a/vendor/github.com/codegangsta/cli/altsrc/altsrc.go b/vendor/github.com/codegangsta/cli/altsrc/altsrc.go
new file mode 100644
index 0000000..ac34bf6
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/altsrc/altsrc.go
@@ -0,0 +1,3 @@
+package altsrc
+
+//go:generate python ../generate-flag-types altsrc -i ../flag-types.json -o flag_generated.go
diff --git a/vendor/github.com/codegangsta/cli/altsrc/flag.go b/vendor/github.com/codegangsta/cli/altsrc/flag.go
index 3e44d02..84ef009 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/flag.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/flag.go
@@ -1,13 +1,12 @@
 package altsrc
 
 import (
-	"flag"
 	"fmt"
-	"os"
 	"strconv"
 	"strings"
+	"syscall"
 
-	"github.com/urfave/cli"
+	"gopkg.in/urfave/cli.v1"
 )
 
 // FlagInputSourceExtension is an extension interface of cli.Flag that
@@ -63,18 +62,6 @@
 	}
 }
 
-// GenericFlag is the flag type that wraps cli.GenericFlag to allow
-// for other values to be specified
-type GenericFlag struct {
-	cli.GenericFlag
-	set *flag.FlagSet
-}
-
-// NewGenericFlag creates a new GenericFlag
-func NewGenericFlag(flag cli.GenericFlag) *GenericFlag {
-	return &GenericFlag{GenericFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a generic value to the flagSet if required
 func (f *GenericFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -94,25 +81,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped GenericFlag.Apply
-func (f *GenericFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-	f.GenericFlag.Apply(set)
-}
-
-// StringSliceFlag is the flag type that wraps cli.StringSliceFlag to allow
-// for other values to be specified
-type StringSliceFlag struct {
-	cli.StringSliceFlag
-	set *flag.FlagSet
-}
-
-// NewStringSliceFlag creates a new StringSliceFlag
-func NewStringSliceFlag(flag cli.StringSliceFlag) *StringSliceFlag {
-	return &StringSliceFlag{StringSliceFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a StringSlice value to the flagSet if required
 func (f *StringSliceFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -135,25 +103,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped StringSliceFlag.Apply
-func (f *StringSliceFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-	f.StringSliceFlag.Apply(set)
-}
-
-// IntSliceFlag is the flag type that wraps cli.IntSliceFlag to allow
-// for other values to be specified
-type IntSliceFlag struct {
-	cli.IntSliceFlag
-	set *flag.FlagSet
-}
-
-// NewIntSliceFlag creates a new IntSliceFlag
-func NewIntSliceFlag(flag cli.IntSliceFlag) *IntSliceFlag {
-	return &IntSliceFlag{IntSliceFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a IntSlice value if required
 func (f *IntSliceFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -176,25 +125,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped IntSliceFlag.Apply
-func (f *IntSliceFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-	f.IntSliceFlag.Apply(set)
-}
-
-// BoolFlag is the flag type that wraps cli.BoolFlag to allow
-// for other values to be specified
-type BoolFlag struct {
-	cli.BoolFlag
-	set *flag.FlagSet
-}
-
-// NewBoolFlag creates a new BoolFlag
-func NewBoolFlag(flag cli.BoolFlag) *BoolFlag {
-	return &BoolFlag{BoolFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a Bool value to the flagSet if required
 func (f *BoolFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -213,25 +143,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped BoolFlag.Apply
-func (f *BoolFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-	f.BoolFlag.Apply(set)
-}
-
-// BoolTFlag is the flag type that wraps cli.BoolTFlag to allow
-// for other values to be specified
-type BoolTFlag struct {
-	cli.BoolTFlag
-	set *flag.FlagSet
-}
-
-// NewBoolTFlag creates a new BoolTFlag
-func NewBoolTFlag(flag cli.BoolTFlag) *BoolTFlag {
-	return &BoolTFlag{BoolTFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a BoolT value to the flagSet if required
 func (f *BoolTFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -250,26 +161,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped BoolTFlag.Apply
-func (f *BoolTFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-
-	f.BoolTFlag.Apply(set)
-}
-
-// StringFlag is the flag type that wraps cli.StringFlag to allow
-// for other values to be specified
-type StringFlag struct {
-	cli.StringFlag
-	set *flag.FlagSet
-}
-
-// NewStringFlag creates a new StringFlag
-func NewStringFlag(flag cli.StringFlag) *StringFlag {
-	return &StringFlag{StringFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a String value to the flagSet if required
 func (f *StringFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -288,26 +179,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped StringFlag.Apply
-func (f *StringFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-
-	f.StringFlag.Apply(set)
-}
-
-// IntFlag is the flag type that wraps cli.IntFlag to allow
-// for other values to be specified
-type IntFlag struct {
-	cli.IntFlag
-	set *flag.FlagSet
-}
-
-// NewIntFlag creates a new IntFlag
-func NewIntFlag(flag cli.IntFlag) *IntFlag {
-	return &IntFlag{IntFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a int value to the flagSet if required
 func (f *IntFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -326,25 +197,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped IntFlag.Apply
-func (f *IntFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-	f.IntFlag.Apply(set)
-}
-
-// DurationFlag is the flag type that wraps cli.DurationFlag to allow
-// for other values to be specified
-type DurationFlag struct {
-	cli.DurationFlag
-	set *flag.FlagSet
-}
-
-// NewDurationFlag creates a new DurationFlag
-func NewDurationFlag(flag cli.DurationFlag) *DurationFlag {
-	return &DurationFlag{DurationFlag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a Duration value to the flagSet if required
 func (f *DurationFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -363,26 +215,6 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped DurationFlag.Apply
-func (f *DurationFlag) Apply(set *flag.FlagSet) {
-	f.set = set
-
-	f.DurationFlag.Apply(set)
-}
-
-// Float64Flag is the flag type that wraps cli.Float64Flag to allow
-// for other values to be specified
-type Float64Flag struct {
-	cli.Float64Flag
-	set *flag.FlagSet
-}
-
-// NewFloat64Flag creates a new Float64Flag
-func NewFloat64Flag(flag cli.Float64Flag) *Float64Flag {
-	return &Float64Flag{Float64Flag: flag, set: nil}
-}
-
 // ApplyInputSourceValue applies a Float64 value to the flagSet if required
 func (f *Float64Flag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
 	if f.set != nil {
@@ -402,24 +234,14 @@
 	return nil
 }
 
-// Apply saves the flagSet for later usage then calls
-// the wrapped Float64Flag.Apply
-func (f *Float64Flag) Apply(set *flag.FlagSet) {
-	f.set = set
-
-	f.Float64Flag.Apply(set)
-}
-
 func isEnvVarSet(envVars string) bool {
 	for _, envVar := range strings.Split(envVars, ",") {
 		envVar = strings.TrimSpace(envVar)
-		if envVal := os.Getenv(envVar); envVal != "" {
+		if _, ok := syscall.Getenv(envVar); ok {
 			// TODO: Can't use this for bools as
 			// set means that it was true or false based on
 			// Bool flag type, should work for other types
-			if len(envVal) > 0 {
-				return true
-			}
+			return true
 		}
 	}
 
diff --git a/vendor/github.com/codegangsta/cli/altsrc/flag_generated.go b/vendor/github.com/codegangsta/cli/altsrc/flag_generated.go
new file mode 100644
index 0000000..0aeb0b0
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/altsrc/flag_generated.go
@@ -0,0 +1,347 @@
+package altsrc
+
+import (
+	"flag"
+
+	"gopkg.in/urfave/cli.v1"
+)
+
+// WARNING: This file is generated!
+
+// BoolFlag is the flag type that wraps cli.BoolFlag to allow
+// for other values to be specified
+type BoolFlag struct {
+	cli.BoolFlag
+	set *flag.FlagSet
+}
+
+// NewBoolFlag creates a new BoolFlag
+func NewBoolFlag(fl cli.BoolFlag) *BoolFlag {
+	return &BoolFlag{BoolFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped BoolFlag.Apply
+func (f *BoolFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.BoolFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped BoolFlag.ApplyWithError
+func (f *BoolFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.BoolFlag.ApplyWithError(set)
+}
+
+// BoolTFlag is the flag type that wraps cli.BoolTFlag to allow
+// for other values to be specified
+type BoolTFlag struct {
+	cli.BoolTFlag
+	set *flag.FlagSet
+}
+
+// NewBoolTFlag creates a new BoolTFlag
+func NewBoolTFlag(fl cli.BoolTFlag) *BoolTFlag {
+	return &BoolTFlag{BoolTFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped BoolTFlag.Apply
+func (f *BoolTFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.BoolTFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped BoolTFlag.ApplyWithError
+func (f *BoolTFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.BoolTFlag.ApplyWithError(set)
+}
+
+// DurationFlag is the flag type that wraps cli.DurationFlag to allow
+// for other values to be specified
+type DurationFlag struct {
+	cli.DurationFlag
+	set *flag.FlagSet
+}
+
+// NewDurationFlag creates a new DurationFlag
+func NewDurationFlag(fl cli.DurationFlag) *DurationFlag {
+	return &DurationFlag{DurationFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped DurationFlag.Apply
+func (f *DurationFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.DurationFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped DurationFlag.ApplyWithError
+func (f *DurationFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.DurationFlag.ApplyWithError(set)
+}
+
+// Float64Flag is the flag type that wraps cli.Float64Flag to allow
+// for other values to be specified
+type Float64Flag struct {
+	cli.Float64Flag
+	set *flag.FlagSet
+}
+
+// NewFloat64Flag creates a new Float64Flag
+func NewFloat64Flag(fl cli.Float64Flag) *Float64Flag {
+	return &Float64Flag{Float64Flag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Float64Flag.Apply
+func (f *Float64Flag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Float64Flag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Float64Flag.ApplyWithError
+func (f *Float64Flag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Float64Flag.ApplyWithError(set)
+}
+
+// GenericFlag is the flag type that wraps cli.GenericFlag to allow
+// for other values to be specified
+type GenericFlag struct {
+	cli.GenericFlag
+	set *flag.FlagSet
+}
+
+// NewGenericFlag creates a new GenericFlag
+func NewGenericFlag(fl cli.GenericFlag) *GenericFlag {
+	return &GenericFlag{GenericFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped GenericFlag.Apply
+func (f *GenericFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.GenericFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped GenericFlag.ApplyWithError
+func (f *GenericFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.GenericFlag.ApplyWithError(set)
+}
+
+// Int64Flag is the flag type that wraps cli.Int64Flag to allow
+// for other values to be specified
+type Int64Flag struct {
+	cli.Int64Flag
+	set *flag.FlagSet
+}
+
+// NewInt64Flag creates a new Int64Flag
+func NewInt64Flag(fl cli.Int64Flag) *Int64Flag {
+	return &Int64Flag{Int64Flag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Int64Flag.Apply
+func (f *Int64Flag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Int64Flag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Int64Flag.ApplyWithError
+func (f *Int64Flag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Int64Flag.ApplyWithError(set)
+}
+
+// IntFlag is the flag type that wraps cli.IntFlag to allow
+// for other values to be specified
+type IntFlag struct {
+	cli.IntFlag
+	set *flag.FlagSet
+}
+
+// NewIntFlag creates a new IntFlag
+func NewIntFlag(fl cli.IntFlag) *IntFlag {
+	return &IntFlag{IntFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped IntFlag.Apply
+func (f *IntFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.IntFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped IntFlag.ApplyWithError
+func (f *IntFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.IntFlag.ApplyWithError(set)
+}
+
+// IntSliceFlag is the flag type that wraps cli.IntSliceFlag to allow
+// for other values to be specified
+type IntSliceFlag struct {
+	cli.IntSliceFlag
+	set *flag.FlagSet
+}
+
+// NewIntSliceFlag creates a new IntSliceFlag
+func NewIntSliceFlag(fl cli.IntSliceFlag) *IntSliceFlag {
+	return &IntSliceFlag{IntSliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped IntSliceFlag.Apply
+func (f *IntSliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.IntSliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped IntSliceFlag.ApplyWithError
+func (f *IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.IntSliceFlag.ApplyWithError(set)
+}
+
+// Int64SliceFlag is the flag type that wraps cli.Int64SliceFlag to allow
+// for other values to be specified
+type Int64SliceFlag struct {
+	cli.Int64SliceFlag
+	set *flag.FlagSet
+}
+
+// NewInt64SliceFlag creates a new Int64SliceFlag
+func NewInt64SliceFlag(fl cli.Int64SliceFlag) *Int64SliceFlag {
+	return &Int64SliceFlag{Int64SliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Int64SliceFlag.Apply
+func (f *Int64SliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Int64SliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Int64SliceFlag.ApplyWithError
+func (f *Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Int64SliceFlag.ApplyWithError(set)
+}
+
+// StringFlag is the flag type that wraps cli.StringFlag to allow
+// for other values to be specified
+type StringFlag struct {
+	cli.StringFlag
+	set *flag.FlagSet
+}
+
+// NewStringFlag creates a new StringFlag
+func NewStringFlag(fl cli.StringFlag) *StringFlag {
+	return &StringFlag{StringFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped StringFlag.Apply
+func (f *StringFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.StringFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped StringFlag.ApplyWithError
+func (f *StringFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.StringFlag.ApplyWithError(set)
+}
+
+// StringSliceFlag is the flag type that wraps cli.StringSliceFlag to allow
+// for other values to be specified
+type StringSliceFlag struct {
+	cli.StringSliceFlag
+	set *flag.FlagSet
+}
+
+// NewStringSliceFlag creates a new StringSliceFlag
+func NewStringSliceFlag(fl cli.StringSliceFlag) *StringSliceFlag {
+	return &StringSliceFlag{StringSliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped StringSliceFlag.Apply
+func (f *StringSliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.StringSliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped StringSliceFlag.ApplyWithError
+func (f *StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.StringSliceFlag.ApplyWithError(set)
+}
+
+// Uint64Flag is the flag type that wraps cli.Uint64Flag to allow
+// for other values to be specified
+type Uint64Flag struct {
+	cli.Uint64Flag
+	set *flag.FlagSet
+}
+
+// NewUint64Flag creates a new Uint64Flag
+func NewUint64Flag(fl cli.Uint64Flag) *Uint64Flag {
+	return &Uint64Flag{Uint64Flag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Uint64Flag.Apply
+func (f *Uint64Flag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Uint64Flag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Uint64Flag.ApplyWithError
+func (f *Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Uint64Flag.ApplyWithError(set)
+}
+
+// UintFlag is the flag type that wraps cli.UintFlag to allow
+// for other values to be specified
+type UintFlag struct {
+	cli.UintFlag
+	set *flag.FlagSet
+}
+
+// NewUintFlag creates a new UintFlag
+func NewUintFlag(fl cli.UintFlag) *UintFlag {
+	return &UintFlag{UintFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped UintFlag.Apply
+func (f *UintFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.UintFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped UintFlag.ApplyWithError
+func (f *UintFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.UintFlag.ApplyWithError(set)
+}
diff --git a/vendor/github.com/codegangsta/cli/altsrc/flag_test.go b/vendor/github.com/codegangsta/cli/altsrc/flag_test.go
index 218e9b8..9e9c96d 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/urfave/cli"
+	"gopkg.in/urfave/cli.v1"
 )
 
 type testApplyInputSource struct {
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 8ea7e92..276dcda 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/urfave/cli"
+	"gopkg.in/urfave/cli.v1"
 )
 
 // 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 b1c8e4f..b720995 100644
--- a/vendor/github.com/codegangsta/cli/altsrc/map_input_source.go
+++ b/vendor/github.com/codegangsta/cli/altsrc/map_input_source.go
@@ -6,7 +6,7 @@
 	"strings"
 	"time"
 
-	"github.com/urfave/cli"
+	"gopkg.in/urfave/cli.v1"
 )
 
 // MapInputSource implements InputSourceContext to return
diff --git a/vendor/github.com/codegangsta/cli/altsrc/toml_command_test.go b/vendor/github.com/codegangsta/cli/altsrc/toml_command_test.go
new file mode 100644
index 0000000..a5053d4
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/altsrc/toml_command_test.go
@@ -0,0 +1,310 @@
+// Disabling building of toml support in cases where golang is 1.0 or 1.1
+// as the encoding library is not implemented or supported.
+
+// +build go1.2
+
+package altsrc
+
+import (
+	"flag"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"gopkg.in/urfave/cli.v1"
+)
+
+func TestCommandTomFileTest(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "test"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestGlobalEnvVarWins(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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("test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "test", EnvVar: "THE_TEST"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestGlobalEnvVarWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("[top]\ntest = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestSpecifiedFlagWins(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml", "--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("test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "test"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestSpecifiedFlagWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte(`[top]
+  test = 15`), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml", "--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, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestDefaultValueFileWins(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "test", Value: 7}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestDefaultValueFileWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("[top]\ntest = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileFlagHasDefaultGlobalEnvTomlSetGlobalEnvWins(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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("test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(cli.IntFlag{Name: "test", Value: 7, EnvVar: "THE_TEST"}),
+			cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileFlagHasDefaultGlobalEnvTomlSetGlobalEnvWinsNested(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("[top]\ntest = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	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, NewTomlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
diff --git a/vendor/github.com/codegangsta/cli/altsrc/toml_file_loader.go b/vendor/github.com/codegangsta/cli/altsrc/toml_file_loader.go
new file mode 100644
index 0000000..39c124f
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/altsrc/toml_file_loader.go
@@ -0,0 +1,113 @@
+// Disabling building of toml support in cases where golang is 1.0 or 1.1
+// as the encoding library is not implemented or supported.
+
+// +build go1.2
+
+package altsrc
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/BurntSushi/toml"
+	"gopkg.in/urfave/cli.v1"
+)
+
+type tomlMap struct {
+	Map map[interface{}]interface{}
+}
+
+func unmarshalMap(i interface{}) (ret map[interface{}]interface{}, err error) {
+	ret = make(map[interface{}]interface{})
+	m := i.(map[string]interface{})
+	for key, val := range m {
+		v := reflect.ValueOf(val)
+		switch v.Kind() {
+		case reflect.Bool:
+			ret[key] = val.(bool)
+		case reflect.String:
+			ret[key] = val.(string)
+		case reflect.Int:
+			ret[key] = int(val.(int))
+		case reflect.Int8:
+			ret[key] = int(val.(int8))
+		case reflect.Int16:
+			ret[key] = int(val.(int16))
+		case reflect.Int32:
+			ret[key] = int(val.(int32))
+		case reflect.Int64:
+			ret[key] = int(val.(int64))
+		case reflect.Uint:
+			ret[key] = int(val.(uint))
+		case reflect.Uint8:
+			ret[key] = int(val.(uint8))
+		case reflect.Uint16:
+			ret[key] = int(val.(uint16))
+		case reflect.Uint32:
+			ret[key] = int(val.(uint32))
+		case reflect.Uint64:
+			ret[key] = int(val.(uint64))
+		case reflect.Float32:
+			ret[key] = float64(val.(float32))
+		case reflect.Float64:
+			ret[key] = float64(val.(float64))
+		case reflect.Map:
+			if tmp, err := unmarshalMap(val); err == nil {
+				ret[key] = tmp
+			} else {
+				return nil, err
+			}
+		case reflect.Array:
+			fallthrough // [todo] - Support array type
+		default:
+			return nil, fmt.Errorf("Unsupported: type = %#v", v.Kind())
+		}
+	}
+	return ret, nil
+}
+
+func (self *tomlMap) UnmarshalTOML(i interface{}) error {
+	if tmp, err := unmarshalMap(i); err == nil {
+		self.Map = tmp
+	} else {
+		return err
+	}
+	return nil
+}
+
+type tomlSourceContext struct {
+	FilePath string
+}
+
+// NewTomlSourceFromFile creates a new TOML InputSourceContext from a filepath.
+func NewTomlSourceFromFile(file string) (InputSourceContext, error) {
+	tsc := &tomlSourceContext{FilePath: file}
+	var results tomlMap = tomlMap{}
+	if err := readCommandToml(tsc.FilePath, &results); err != nil {
+		return nil, fmt.Errorf("Unable to load TOML file '%s': inner error: \n'%v'", tsc.FilePath, err.Error())
+	}
+	return &MapInputSource{valueMap: results.Map}, nil
+}
+
+// NewTomlSourceFromFlagFunc creates a new TOML InputSourceContext from a provided flag name and source context.
+func NewTomlSourceFromFlagFunc(flagFileName string) func(context *cli.Context) (InputSourceContext, error) {
+	return func(context *cli.Context) (InputSourceContext, error) {
+		filePath := context.String(flagFileName)
+		return NewTomlSourceFromFile(filePath)
+	}
+}
+
+func readCommandToml(filePath string, container interface{}) (err error) {
+	b, err := loadDataFrom(filePath)
+	if err != nil {
+		return err
+	}
+
+	err = toml.Unmarshal(b, container)
+	if err != nil {
+		return err
+	}
+
+	err = nil
+	return
+}
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 31f78ce..9d3f431 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/urfave/cli"
+	"gopkg.in/urfave/cli.v1"
 )
 
 func TestCommandYamlFileTest(t *testing.T) {
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 b4e3365..335356f 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/urfave/cli"
+	"gopkg.in/urfave/cli.v1"
 
 	"gopkg.in/yaml.v2"
 )
diff --git a/vendor/github.com/codegangsta/cli/app.go b/vendor/github.com/codegangsta/cli/app.go
index a046c01..95ffc0b 100644
--- a/vendor/github.com/codegangsta/cli/app.go
+++ b/vendor/github.com/codegangsta/cli/app.go
@@ -6,9 +6,7 @@
 	"io/ioutil"
 	"os"
 	"path/filepath"
-	"reflect"
 	"sort"
-	"strings"
 	"time"
 )
 
@@ -19,11 +17,8 @@
 
 	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)+
+	errInvalidActionType = NewExitError("ERROR invalid Action type. "+
+		fmt.Sprintf("Must be `func(*Context`)` or `func(*Context) error).  %s", contactSysadmin)+
 		fmt.Sprintf("See %s", appActionDeprecationURL), 2)
 )
 
@@ -42,6 +37,8 @@
 	ArgsUsage string
 	// Version of the program
 	Version string
+	// Description of the program
+	Description string
 	// List of commands to execute
 	Commands []Command
 	// List of flags to parse
@@ -62,10 +59,11 @@
 	// An action to execute after any subcommands are run, but after the subcommand has finished
 	// It is run even if Action() panics
 	After AfterFunc
+
 	// The action to execute when no subcommands are specified
+	// Expects a `cli.ActionFunc` but will accept the *deprecated* signature of `func(*cli.Context) {}`
+	// *Note*: support for the deprecated `Action` signature will be removed in a future version
 	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 CommandNotFoundFunc
@@ -147,10 +145,6 @@
 		}
 	}
 
-	if a.EnableBashCompletion {
-		a.appendFlag(BashCompletionFlag)
-	}
-
 	if !a.HideVersion {
 		a.appendFlag(VersionFlag)
 	}
@@ -160,6 +154,14 @@
 		a.categories = a.categories.AddCommand(command.Category, command)
 	}
 	sort.Sort(a.categories)
+
+	if a.Metadata == nil {
+		a.Metadata = make(map[string]interface{})
+	}
+
+	if a.Writer == nil {
+		a.Writer = os.Stdout
+	}
 }
 
 // Run is the entry point to the cli app. Parses the arguments slice and routes
@@ -167,8 +169,20 @@
 func (a *App) Run(arguments []string) (err error) {
 	a.Setup()
 
+	// handle the completion flag separately from the flagset since
+	// completion could be attempted after a flag, but before its value was put
+	// on the command line. this causes the flagset to interpret the completion
+	// flag name as the value of the flag before it which is undesirable
+	// note that we can only do this because the shell autocomplete function
+	// always appends the completion flag at the end of the command
+	shellComplete, arguments := checkShellCompleteFlag(a, arguments)
+
 	// parse flags
-	set := flagSet(a.Name, a.Flags)
+	set, err := flagSet(a.Name, a.Flags)
+	if err != nil {
+		return err
+	}
+
 	set.SetOutput(ioutil.Discard)
 	err = set.Parse(arguments[1:])
 	nerr := normalizeFlags(a.Flags, set)
@@ -178,6 +192,7 @@
 		ShowAppHelp(context)
 		return nerr
 	}
+	context.shellComplete = shellComplete
 
 	if checkCompletions(context) {
 		return nil
@@ -189,7 +204,7 @@
 			HandleExitCoder(err)
 			return err
 		}
-		fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
+		fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
 		ShowAppHelp(context)
 		return err
 	}
@@ -236,6 +251,10 @@
 		}
 	}
 
+	if a.Action == nil {
+		a.Action = helpCommand.Action
+	}
+
 	// Run default Action
 	err = HandleAction(a.Action, context)
 
@@ -243,11 +262,12 @@
 	return err
 }
 
-// DEPRECATED: Another entry point to the cli app, takes care of passing arguments and error handling
+// RunAndExitOnError calls .Run() and exits non-zero if an error was returned
+//
+// Deprecated: instead you should return an error that fulfills cli.ExitCoder
+// to cli.App.Run. This will cause the application to exit with the given eror
+// code in the cli.ExitCoder
 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(a.errWriter(), err)
 		OsExiter(1)
@@ -276,13 +296,12 @@
 	}
 	a.Commands = newCmds
 
-	// append flags
-	if a.EnableBashCompletion {
-		a.appendFlag(BashCompletionFlag)
+	// parse flags
+	set, err := flagSet(a.Name, a.Flags)
+	if err != nil {
+		return err
 	}
 
-	// parse flags
-	set := flagSet(a.Name, a.Flags)
 	set.SetOutput(ioutil.Discard)
 	err = set.Parse(ctx.Args().Tail())
 	nerr := normalizeFlags(a.Flags, set)
@@ -309,7 +328,7 @@
 			HandleExitCoder(err)
 			return err
 		}
-		fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
+		fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
 		ShowSubcommandHelp(context)
 		return err
 	}
@@ -450,50 +469,24 @@
 func (a Author) String() string {
 	e := ""
 	if a.Email != "" {
-		e = "<" + a.Email + "> "
+		e = " <" + a.Email + ">"
 	}
 
-	return fmt.Sprintf("%v %v", a.Name, e)
+	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!
+// HandleAction attempts to figure out which Action signature was used.  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)
+	if a, ok := action.(ActionFunc); ok {
+		return a(context)
+	} else if a, ok := action.(func(*Context) error); ok {
+		return a(context)
+	} else if a, ok := action.(func(*Context)); ok { // deprecated function signature
+		a(context)
 		return nil
+	} else {
+		return errInvalidActionType
 	}
-
-	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 9c6b960..10f1562 100644
--- a/vendor/github.com/codegangsta/cli/app_test.go
+++ b/vendor/github.com/codegangsta/cli/app_test.go
@@ -13,6 +13,19 @@
 	"testing"
 )
 
+var (
+	lastExitCode = 0
+	fakeOsExiter = func(rc int) {
+		lastExitCode = rc
+	}
+	fakeErrWriter = &bytes.Buffer{}
+)
+
+func init() {
+	OsExiter = fakeOsExiter
+	ErrWriter = fakeErrWriter
+}
+
 type opCounts struct {
 	Total, BashComplete, OnUsageError, Before, CommandNotFound, Action, After, SubCommand int
 }
@@ -77,7 +90,62 @@
 	// Hello, Jeremy
 }
 
-func ExampleApp_Run_help() {
+func ExampleApp_Run_appHelp() {
+	// set args for examples sake
+	os.Args = []string{"greet", "help"}
+
+	app := NewApp()
+	app.Name = "greet"
+	app.Version = "0.1.0"
+	app.Description = "This is how we describe greet the app"
+	app.Authors = []Author{
+		{Name: "Harrison", Email: "harrison@lolwut.com"},
+		{Name: "Oliver Allen", Email: "oliver@toyshop.com"},
+	}
+	app.Flags = []Flag{
+		StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
+	}
+	app.Commands = []Command{
+		{
+			Name:        "describeit",
+			Aliases:     []string{"d"},
+			Usage:       "use it to see a description",
+			Description: "This is how we describe describeit the function",
+			Action: func(c *Context) error {
+				fmt.Printf("i like to describe things")
+				return nil
+			},
+		},
+	}
+	app.Run(os.Args)
+	// Output:
+	// NAME:
+	//    greet - A new cli application
+	//
+	// USAGE:
+	//    greet [global options] command [command options] [arguments...]
+	//
+	// VERSION:
+	//    0.1.0
+	//
+	// DESCRIPTION:
+	//    This is how we describe greet the app
+	//
+	// AUTHORS:
+	//    Harrison <harrison@lolwut.com>
+	//    Oliver Allen <oliver@toyshop.com>
+	//
+	// COMMANDS:
+	//      describeit, d  use it to see a description
+	//      help, h        Shows a list of commands or help for one command
+	//
+	// GLOBAL OPTIONS:
+	//    --name value   a name to say (default: "bob")
+	//    --help, -h     show help
+	//    --version, -v  print the version
+}
+
+func ExampleApp_Run_commandHelp() {
 	// set args for examples sake
 	os.Args = []string{"greet", "h", "describeit"}
 
@@ -110,6 +178,49 @@
 	//    This is how we describe describeit the function
 }
 
+func ExampleApp_Run_noAction() {
+	app := App{}
+	app.Name = "greet"
+	app.Run([]string{"greet"})
+	// Output:
+	// NAME:
+	//    greet
+	//
+	// USAGE:
+	//     [global options] command [command options] [arguments...]
+	//
+	// COMMANDS:
+	//      help, h  Shows a list of commands or help for one command
+	//
+	// GLOBAL OPTIONS:
+	//    --help, -h     show help
+	//    --version, -v  print the version
+}
+
+func ExampleApp_Run_subcommandNoAction() {
+	app := App{}
+	app.Name = "greet"
+	app.Commands = []Command{
+		{
+			Name:        "describeit",
+			Aliases:     []string{"d"},
+			Usage:       "use it to see a description",
+			Description: "This is how we describe describeit the function",
+		},
+	}
+	app.Run([]string{"greet", "describeit"})
+	// Output:
+	// NAME:
+	//     describeit - use it to see a description
+	//
+	// USAGE:
+	//     describeit [arguments...]
+	//
+	// DESCRIPTION:
+	//    This is how we describe describeit the function
+
+}
+
 func ExampleApp_Run_bashComplete() {
 	// set args for examples sake
 	os.Args = []string{"greet", "--generate-bash-completion"}
@@ -189,6 +300,12 @@
 	}
 }
 
+func TestApp_Setup_defaultsWriter(t *testing.T) {
+	app := &App{}
+	app.Setup()
+	expect(t, app.Writer, os.Stdout)
+}
+
 func TestApp_CommandWithArgBeforeFlags(t *testing.T) {
 	var parsedOption, firstArg string
 
@@ -239,6 +356,23 @@
 	expect(t, context.String("lang"), "spanish")
 }
 
+func TestApp_RunAsSubCommandIncorrectUsage(t *testing.T) {
+	a := App{
+		Flags: []Flag{
+			StringFlag{Name: "--foo"},
+		},
+		Writer: bytes.NewBufferString(""),
+	}
+
+	set := flag.NewFlagSet("", flag.ContinueOnError)
+	set.Parse([]string{"", "---foo"})
+	c := &Context{flagSet: set}
+
+	err := a.RunAsSubcommand(c)
+
+	expect(t, err, errors.New("bad flag syntax: ---foo"))
+}
+
 func TestApp_CommandWithFlagBeforeTerminator(t *testing.T) {
 	var parsedOption string
 	var args []string
@@ -908,6 +1042,7 @@
 			Name:        "foo",
 			Description: "descriptive wall of text about how it does foo things",
 			Subcommands: []Command{subCmdBar, subCmdBaz},
+			Action:      func(c *Context) error { return nil },
 		}
 
 		app.Commands = []Command{cmd}
@@ -1388,7 +1523,39 @@
 func TestHandleAction_WithNonFuncAction(t *testing.T) {
 	app := NewApp()
 	app.Action = 42
-	err := HandleAction(app.Action, NewContext(app, flagSet(app.Name, app.Flags), nil))
+	fs, err := flagSet(app.Name, app.Flags)
+	if err != nil {
+		t.Errorf("error creating FlagSet: %s", err)
+	}
+	err = HandleAction(app.Action, NewContext(app, fs, 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 "" }
+	fs, err := flagSet(app.Name, app.Flags)
+	if err != nil {
+		t.Errorf("error creating FlagSet: %s", err)
+	}
+	err = HandleAction(app.Action, NewContext(app, fs, nil))
 
 	if err == nil {
 		t.Fatalf("expected to receive error from Run, got none")
@@ -1409,34 +1576,14 @@
 	}
 }
 
-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))
+	fs, err := flagSet(app.Name, app.Flags)
+	if err != nil {
+		t.Errorf("error creating FlagSet: %s", err)
+	}
+	err = HandleAction(app.Action, NewContext(app, fs, nil))
 
 	if err == nil {
 		t.Fatalf("expected to receive error from Run, got none")
@@ -1448,7 +1595,7 @@
 		t.Fatalf("expected to receive a *ExitError")
 	}
 
-	if !strings.HasPrefix(exitErr.Error(), "ERROR invalid Action signature") {
+	if !strings.HasPrefix(exitErr.Error(), "ERROR invalid Action type") {
 		t.Fatalf("expected an invalid Action signature error, but got: %v", exitErr.Error())
 	}
 
@@ -1467,5 +1614,72 @@
 		fn(ctx)
 		return nil
 	}
-	HandleAction(app.Action, NewContext(app, flagSet(app.Name, app.Flags), nil))
+	fs, err := flagSet(app.Name, app.Flags)
+	if err != nil {
+		t.Errorf("error creating FlagSet: %s", err)
+	}
+	HandleAction(app.Action, NewContext(app, fs, nil))
+}
+
+func TestShellCompletionForIncompleteFlags(t *testing.T) {
+	app := NewApp()
+	app.Flags = []Flag{
+		IntFlag{
+			Name: "test-completion",
+		},
+	}
+	app.EnableBashCompletion = true
+	app.BashComplete = func(ctx *Context) {
+		for _, command := range ctx.App.Commands {
+			if command.Hidden {
+				continue
+			}
+
+			for _, name := range command.Names() {
+				fmt.Fprintln(ctx.App.Writer, name)
+			}
+		}
+
+		for _, flag := range ctx.App.Flags {
+			for _, name := range strings.Split(flag.GetName(), ",") {
+				if name == BashCompletionFlag.Name {
+					continue
+				}
+
+				switch name = strings.TrimSpace(name); len(name) {
+				case 0:
+				case 1:
+					fmt.Fprintln(ctx.App.Writer, "-"+name)
+				default:
+					fmt.Fprintln(ctx.App.Writer, "--"+name)
+				}
+			}
+		}
+	}
+	app.Action = func(ctx *Context) error {
+		return fmt.Errorf("should not get here")
+	}
+	err := app.Run([]string{"", "--test-completion", "--" + BashCompletionFlag.Name})
+	if err != nil {
+		t.Errorf("app should not return an error: %s", err)
+	}
+}
+
+func TestHandleActionActuallyWorksWithActions(t *testing.T) {
+	var f ActionFunc
+	called := false
+	f = func(c *Context) error {
+		called = true
+		return nil
+	}
+
+	err := HandleAction(f, nil)
+
+	if err != nil {
+		t.Errorf("Should not have errored: %v", err)
+	}
+
+	if !called {
+		t.Errorf("Function was not called")
+	}
 }
diff --git a/vendor/github.com/codegangsta/cli/appveyor.yml b/vendor/github.com/codegangsta/cli/appveyor.yml
index 173086e..698b188 100644
--- a/vendor/github.com/codegangsta/cli/appveyor.yml
+++ b/vendor/github.com/codegangsta/cli/appveyor.yml
@@ -10,16 +10,15 @@
   PYTHON: C:\Python27-x64
   PYTHON_VERSION: 2.7.x
   PYTHON_ARCH: 64
-  GFMXR_DEBUG: 1
 
 install:
 - set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
 - go version
 - go env
-- go get github.com/urfave/gfmxr/...
+- go get github.com/urfave/gfmrun/...
 - go get -v -t ./...
 
 build_script:
 - python runtests vet
 - python runtests test
-- python runtests gfmxr
+- python runtests gfmrun
diff --git a/vendor/github.com/codegangsta/cli/cli.go b/vendor/github.com/codegangsta/cli/cli.go
index f0440c5..74fd101 100644
--- a/vendor/github.com/codegangsta/cli/cli.go
+++ b/vendor/github.com/codegangsta/cli/cli.go
@@ -17,3 +17,5 @@
 //     app.Run(os.Args)
 //   }
 package cli
+
+//go:generate python ./generate-flag-types cli -i flag-types.json -o flag_generated.go
diff --git a/vendor/github.com/codegangsta/cli/command.go b/vendor/github.com/codegangsta/cli/command.go
index 8950cca..2628fbf 100644
--- a/vendor/github.com/codegangsta/cli/command.go
+++ b/vendor/github.com/codegangsta/cli/command.go
@@ -46,6 +46,11 @@
 	Flags []Flag
 	// Treat all flags as normal arguments if true
 	SkipFlagParsing bool
+	// Skip argument reordering which attempts to move flags before arguments,
+	// but only works if all flags appear after all arguments. This behavior was
+	// removed n version 2 since it only works under specific conditions so we
+	// backport here by exposing it as an option for compatibility.
+	SkipArgReorder bool
 	// Boolean to hide built-in help command
 	HideHelp bool
 	// Boolean to hide this command from help or completion
@@ -82,14 +87,15 @@
 		)
 	}
 
-	if ctx.App.EnableBashCompletion {
-		c.Flags = append(c.Flags, BashCompletionFlag)
+	set, err := flagSet(c.Name, c.Flags)
+	if err != nil {
+		return err
 	}
-
-	set := flagSet(c.Name, c.Flags)
 	set.SetOutput(ioutil.Discard)
 
-	if !c.SkipFlagParsing {
+	if c.SkipFlagParsing {
+		err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
+	} else if !c.SkipArgReorder {
 		firstFlagIndex := -1
 		terminatorIndex := -1
 		for index, arg := range ctx.Args() {
@@ -122,21 +128,7 @@
 			err = set.Parse(ctx.Args().Tail())
 		}
 	} else {
-		if c.SkipFlagParsing {
-			err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
-		}
-	}
-
-	if err != nil {
-		if c.OnUsageError != nil {
-			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
+		err = set.Parse(ctx.Args().Tail())
 	}
 
 	nerr := normalizeFlags(c.Flags, set)
@@ -148,11 +140,22 @@
 	}
 
 	context := NewContext(ctx.App, set, ctx)
-
 	if checkCommandCompletions(context, c.Name) {
 		return nil
 	}
 
+	if err != nil {
+		if c.OnUsageError != nil {
+			err := c.OnUsageError(ctx, err, false)
+			HandleExitCoder(err)
+			return err
+		}
+		fmt.Fprintln(ctx.App.Writer, "Incorrect Usage:", err.Error())
+		fmt.Fprintln(ctx.App.Writer)
+		ShowCommandHelp(ctx, c.Name)
+		return err
+	}
+
 	if checkCommandHelp(context, c.Name) {
 		return nil
 	}
@@ -182,6 +185,10 @@
 		}
 	}
 
+	if c.Action == nil {
+		c.Action = helpSubcommand.Action
+	}
+
 	context.Command = c
 	err = HandleAction(c.Action, context)
 
diff --git a/vendor/github.com/codegangsta/cli/command_test.go b/vendor/github.com/codegangsta/cli/command_test.go
index 6608254..5e0e8de 100644
--- a/vendor/github.com/codegangsta/cli/command_test.go
+++ b/vendor/github.com/codegangsta/cli/command_test.go
@@ -13,12 +13,18 @@
 	cases := []struct {
 		testArgs        []string
 		skipFlagParsing bool
+		skipArgReorder  bool
 		expectedErr     error
 	}{
-		{[]string{"blah", "blah", "-break"}, false, errors.New("flag provided but not defined: -break")}, // Test normal "not ignoring flags" flow
-		{[]string{"blah", "blah"}, true, nil},                                                            // Test SkipFlagParsing without any args that look like flags
-		{[]string{"blah", "-break"}, true, nil},                                                          // Test SkipFlagParsing with random flag arg
-		{[]string{"blah", "-help"}, true, nil},                                                           // Test SkipFlagParsing with "special" help flag arg
+		// Test normal "not ignoring flags" flow
+		{[]string{"test-cmd", "blah", "blah", "-break"}, false, false, errors.New("flag provided but not defined: -break")},
+
+		// Test no arg reorder
+		{[]string{"test-cmd", "blah", "blah", "-break"}, false, true, nil},
+
+		{[]string{"test-cmd", "blah", "blah"}, true, false, nil},   // Test SkipFlagParsing without any args that look like flags
+		{[]string{"test-cmd", "blah", "-break"}, true, false, nil}, // Test SkipFlagParsing with random flag arg
+		{[]string{"test-cmd", "blah", "-help"}, true, false, nil},  // Test SkipFlagParsing with "special" help flag arg
 	}
 
 	for _, c := range cases {
@@ -30,15 +36,15 @@
 		context := NewContext(app, set, nil)
 
 		command := Command{
-			Name:        "test-cmd",
-			Aliases:     []string{"tc"},
-			Usage:       "this is for testing",
-			Description: "testing",
-			Action:      func(_ *Context) error { return nil },
+			Name:            "test-cmd",
+			Aliases:         []string{"tc"},
+			Usage:           "this is for testing",
+			Description:     "testing",
+			Action:          func(_ *Context) error { return nil },
+			SkipFlagParsing: c.skipFlagParsing,
+			SkipArgReorder:  c.skipArgReorder,
 		}
 
-		command.SkipFlagParsing = c.skipFlagParsing
-
 		err := command.Run(context)
 
 		expect(t, err, c.expectedErr)
@@ -73,6 +79,54 @@
 	}
 }
 
+func TestCommand_Run_BeforeSavesMetadata(t *testing.T) {
+	var receivedMsgFromAction string
+	var receivedMsgFromAfter string
+
+	app := NewApp()
+	app.Commands = []Command{
+		{
+			Name: "bar",
+			Before: func(c *Context) error {
+				c.App.Metadata["msg"] = "hello world"
+				return nil
+			},
+			Action: func(c *Context) error {
+				msg, ok := c.App.Metadata["msg"]
+				if !ok {
+					return errors.New("msg not found")
+				}
+				receivedMsgFromAction = msg.(string)
+				return nil
+			},
+			After: func(c *Context) error {
+				msg, ok := c.App.Metadata["msg"]
+				if !ok {
+					return errors.New("msg not found")
+				}
+				receivedMsgFromAfter = msg.(string)
+				return nil
+			},
+		},
+	}
+
+	err := app.Run([]string{"foo", "bar"})
+	if err != nil {
+		t.Fatalf("expected no error from Run, got %s", err)
+	}
+
+	expectedMsg := "hello world"
+
+	if receivedMsgFromAction != expectedMsg {
+		t.Fatalf("expected msg from Action to match. Given: %q\nExpected: %q",
+			receivedMsgFromAction, expectedMsg)
+	}
+	if receivedMsgFromAfter != expectedMsg {
+		t.Fatalf("expected msg from After to match. Given: %q\nExpected: %q",
+			receivedMsgFromAction, expectedMsg)
+	}
+}
+
 func TestCommand_OnUsageError_WithWrongFlagValue(t *testing.T) {
 	app := NewApp()
 	app.Commands = []Command{
diff --git a/vendor/github.com/codegangsta/cli/context.go b/vendor/github.com/codegangsta/cli/context.go
index 879bae5..cb89e92 100644
--- a/vendor/github.com/codegangsta/cli/context.go
+++ b/vendor/github.com/codegangsta/cli/context.go
@@ -3,9 +3,9 @@
 import (
 	"errors"
 	"flag"
-	"strconv"
+	"reflect"
 	"strings"
-	"time"
+	"syscall"
 )
 
 // Context is a type that is passed through to
@@ -13,201 +13,23 @@
 // can be used to retrieve context-specific Args and
 // parsed command-line options.
 type Context struct {
-	App            *App
-	Command        Command
-	flagSet        *flag.FlagSet
-	setFlags       map[string]bool
-	globalSetFlags map[string]bool
-	parentContext  *Context
+	App           *App
+	Command       Command
+	shellComplete bool
+	flagSet       *flag.FlagSet
+	setFlags      map[string]bool
+	parentContext *Context
 }
 
 // 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}
-}
+	c := &Context{App: app, flagSet: set, parentContext: parentCtx}
 
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
-}
-
-// 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)
+	if parentCtx != nil {
+		c.shellComplete = parentCtx.shellComplete
 	}
-	return 0
-}
 
-// 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)
-	}
-	return 0
-}
-
-// 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)
-	}
-	return false
-}
-
-// 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)
-	}
-	return ""
-}
-
-// 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)
-	}
-	return nil
-}
-
-// 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)
-	}
-	return nil
-}
-
-// 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)
-	}
-	return nil
+	return c
 }
 
 // NumFlags returns the number of flags set
@@ -229,28 +51,78 @@
 func (c *Context) IsSet(name string) bool {
 	if c.setFlags == nil {
 		c.setFlags = make(map[string]bool)
+
 		c.flagSet.Visit(func(f *flag.Flag) {
 			c.setFlags[f.Name] = true
 		})
+
+		c.flagSet.VisitAll(func(f *flag.Flag) {
+			if _, ok := c.setFlags[f.Name]; ok {
+				return
+			}
+			c.setFlags[f.Name] = false
+		})
+
+		// XXX hack to support IsSet for flags with EnvVar
+		//
+		// There isn't an easy way to do this with the current implementation since
+		// whether a flag was set via an environment variable is very difficult to
+		// determine here. Instead, we intend to introduce a backwards incompatible
+		// change in version 2 to add `IsSet` to the Flag interface to push the
+		// responsibility closer to where the information required to determine
+		// whether a flag is set by non-standard means such as environment
+		// variables is avaliable.
+		//
+		// See https://github.com/urfave/cli/issues/294 for additional discussion
+		flags := c.Command.Flags
+		if c.Command.Name == "" { // cannot == Command{} since it contains slice types
+			if c.App != nil {
+				flags = c.App.Flags
+			}
+		}
+		for _, f := range flags {
+			eachName(f.GetName(), func(name string) {
+				if isSet, ok := c.setFlags[name]; isSet || !ok {
+					return
+				}
+
+				val := reflect.ValueOf(f)
+				if val.Kind() == reflect.Ptr {
+					val = val.Elem()
+				}
+
+				envVarValue := val.FieldByName("EnvVar")
+				if !envVarValue.IsValid() {
+					return
+				}
+
+				eachName(envVarValue.String(), func(envVar string) {
+					envVar = strings.TrimSpace(envVar)
+					if _, ok := syscall.Getenv(envVar); ok {
+						c.setFlags[name] = true
+						return
+					}
+				})
+			})
+		}
 	}
-	return c.setFlags[name] == true
+
+	return c.setFlags[name]
 }
 
 // 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)
-		ctx := c
-		if ctx.parentContext != nil {
-			ctx = ctx.parentContext
-		}
-		for ; ctx != nil && c.globalSetFlags[name] == false; ctx = ctx.parentContext {
-			ctx.flagSet.Visit(func(f *flag.Flag) {
-				c.globalSetFlags[f.Name] = true
-			})
+	ctx := c
+	if ctx.parentContext != nil {
+		ctx = ctx.parentContext
+	}
+
+	for ; ctx != nil; ctx = ctx.parentContext {
+		if ctx.IsSet(name) {
+			return true
 		}
 	}
-	return c.globalSetFlags[name]
+	return false
 }
 
 // FlagNames returns a slice of flag names used in this context.
@@ -282,6 +154,11 @@
 	return c.parentContext
 }
 
+// value returns the value of the flag coressponding to `name`
+func (c *Context) value(name string) interface{} {
+	return c.flagSet.Lookup(name).Value.(flag.Getter).Get()
+}
+
 // Args contains apps console arguments
 type Args []string
 
@@ -357,156 +234,6 @@
 	return nil
 }
 
-func lookupInt(name string, set *flag.FlagSet) int {
-	f := set.Lookup(name)
-	if f != nil {
-		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
-		}
-		return val
-	}
-
-	return 0
-}
-
-func lookupDuration(name string, set *flag.FlagSet) time.Duration {
-	f := set.Lookup(name)
-	if f != nil {
-		val, err := time.ParseDuration(f.Value.String())
-		if err == nil {
-			return val
-		}
-	}
-
-	return 0
-}
-
-func lookupFloat64(name string, set *flag.FlagSet) float64 {
-	f := set.Lookup(name)
-	if f != nil {
-		val, err := strconv.ParseFloat(f.Value.String(), 64)
-		if err != nil {
-			return 0
-		}
-		return val
-	}
-
-	return 0
-}
-
-func lookupString(name string, set *flag.FlagSet) string {
-	f := set.Lookup(name)
-	if f != nil {
-		return f.Value.String()
-	}
-
-	return ""
-}
-
-func lookupStringSlice(name string, set *flag.FlagSet) []string {
-	f := set.Lookup(name)
-	if f != nil {
-		return (f.Value.(*StringSlice)).Value()
-
-	}
-
-	return nil
-}
-
-func lookupIntSlice(name string, set *flag.FlagSet) []int {
-	f := set.Lookup(name)
-	if f != nil {
-		return (f.Value.(*IntSlice)).Value()
-
-	}
-
-	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 {
-		return f.Value
-	}
-	return nil
-}
-
-func lookupBool(name string, set *flag.FlagSet) bool {
-	f := set.Lookup(name)
-	if f != nil {
-		val, err := strconv.ParseBool(f.Value.String())
-		if err != nil {
-			return false
-		}
-		return val
-	}
-
-	return false
-}
-
-func lookupBoolT(name string, set *flag.FlagSet) bool {
-	f := set.Lookup(name)
-	if f != nil {
-		val, err := strconv.ParseBool(f.Value.String())
-		if err != nil {
-			return true
-		}
-		return val
-	}
-
-	return false
-}
-
 func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
 	switch ff.Value.(type) {
 	case *StringSlice:
diff --git a/vendor/github.com/codegangsta/cli/context_test.go b/vendor/github.com/codegangsta/cli/context_test.go
index 5c68fdd..a1ab05b 100644
--- a/vendor/github.com/codegangsta/cli/context_test.go
+++ b/vendor/github.com/codegangsta/cli/context_test.go
@@ -2,6 +2,7 @@
 
 import (
 	"flag"
+	"os"
 	"testing"
 	"time"
 )
@@ -180,6 +181,52 @@
 	expect(t, c.IsSet("myflagGlobal"), false)
 }
 
+// XXX Corresponds to hack in context.IsSet for flags with EnvVar field
+// Should be moved to `flag_test` in v2
+func TestContext_IsSet_fromEnv(t *testing.T) {
+	var (
+		timeoutIsSet, tIsSet    bool
+		noEnvVarIsSet, nIsSet   bool
+		passwordIsSet, pIsSet   bool
+		unparsableIsSet, uIsSet bool
+	)
+
+	clearenv()
+	os.Setenv("APP_TIMEOUT_SECONDS", "15.5")
+	os.Setenv("APP_PASSWORD", "")
+	a := App{
+		Flags: []Flag{
+			Float64Flag{Name: "timeout, t", EnvVar: "APP_TIMEOUT_SECONDS"},
+			StringFlag{Name: "password, p", EnvVar: "APP_PASSWORD"},
+			Float64Flag{Name: "unparsable, u", EnvVar: "APP_UNPARSABLE"},
+			Float64Flag{Name: "no-env-var, n"},
+		},
+		Action: func(ctx *Context) error {
+			timeoutIsSet = ctx.IsSet("timeout")
+			tIsSet = ctx.IsSet("t")
+			passwordIsSet = ctx.IsSet("password")
+			pIsSet = ctx.IsSet("p")
+			unparsableIsSet = ctx.IsSet("unparsable")
+			uIsSet = ctx.IsSet("u")
+			noEnvVarIsSet = ctx.IsSet("no-env-var")
+			nIsSet = ctx.IsSet("n")
+			return nil
+		},
+	}
+	a.Run([]string{"run"})
+	expect(t, timeoutIsSet, true)
+	expect(t, tIsSet, true)
+	expect(t, passwordIsSet, true)
+	expect(t, pIsSet, true)
+	expect(t, noEnvVarIsSet, false)
+	expect(t, nIsSet, false)
+
+	os.Setenv("APP_UNPARSABLE", "foobar")
+	a.Run([]string{"run"})
+	expect(t, unparsableIsSet, false)
+	expect(t, uIsSet, false)
+}
+
 func TestContext_GlobalIsSet(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Bool("myflag", false, "doc")
@@ -199,6 +246,61 @@
 	expect(t, c.GlobalIsSet("bogusGlobal"), false)
 }
 
+// XXX Corresponds to hack in context.IsSet for flags with EnvVar field
+// Should be moved to `flag_test` in v2
+func TestContext_GlobalIsSet_fromEnv(t *testing.T) {
+	var (
+		timeoutIsSet, tIsSet    bool
+		noEnvVarIsSet, nIsSet   bool
+		passwordIsSet, pIsSet   bool
+		unparsableIsSet, uIsSet bool
+	)
+
+	clearenv()
+	os.Setenv("APP_TIMEOUT_SECONDS", "15.5")
+	os.Setenv("APP_PASSWORD", "")
+	a := App{
+		Flags: []Flag{
+			Float64Flag{Name: "timeout, t", EnvVar: "APP_TIMEOUT_SECONDS"},
+			StringFlag{Name: "password, p", EnvVar: "APP_PASSWORD"},
+			Float64Flag{Name: "no-env-var, n"},
+			Float64Flag{Name: "unparsable, u", EnvVar: "APP_UNPARSABLE"},
+		},
+		Commands: []Command{
+			{
+				Name: "hello",
+				Action: func(ctx *Context) error {
+					timeoutIsSet = ctx.GlobalIsSet("timeout")
+					tIsSet = ctx.GlobalIsSet("t")
+					passwordIsSet = ctx.GlobalIsSet("password")
+					pIsSet = ctx.GlobalIsSet("p")
+					unparsableIsSet = ctx.GlobalIsSet("unparsable")
+					uIsSet = ctx.GlobalIsSet("u")
+					noEnvVarIsSet = ctx.GlobalIsSet("no-env-var")
+					nIsSet = ctx.GlobalIsSet("n")
+					return nil
+				},
+			},
+		},
+	}
+	if err := a.Run([]string{"run", "hello"}); err != nil {
+		t.Logf("error running Run(): %+v", err)
+	}
+	expect(t, timeoutIsSet, true)
+	expect(t, tIsSet, true)
+	expect(t, passwordIsSet, true)
+	expect(t, pIsSet, true)
+	expect(t, noEnvVarIsSet, false)
+	expect(t, nIsSet, false)
+
+	os.Setenv("APP_UNPARSABLE", "foobar")
+	if err := a.Run([]string{"run"}); err != nil {
+		t.Logf("error running Run(): %+v", err)
+	}
+	expect(t, unparsableIsSet, false)
+	expect(t, uIsSet, false)
+}
+
 func TestContext_NumFlags(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Bool("myflag", false, "doc")
diff --git a/vendor/github.com/codegangsta/cli/errors.go b/vendor/github.com/codegangsta/cli/errors.go
index ea551be..0206ff4 100644
--- a/vendor/github.com/codegangsta/cli/errors.go
+++ b/vendor/github.com/codegangsta/cli/errors.go
@@ -24,7 +24,7 @@
 	return MultiError{Errors: err}
 }
 
-// Error implents the error interface.
+// Error implements the error interface.
 func (m MultiError) Error() string {
 	errs := make([]string, len(m.Errors))
 	for i, err := range m.Errors {
@@ -34,6 +34,10 @@
 	return strings.Join(errs, "\n")
 }
 
+type ErrorFormatter interface {
+	Format(s fmt.State, verb rune)
+}
+
 // ExitCoder is the interface checked by `App` and `Command` for a custom exit
 // code
 type ExitCoder interface {
@@ -44,11 +48,11 @@
 // ExitError fulfills both the builtin `error` interface and `ExitCoder`
 type ExitError struct {
 	exitCode int
-	message  string
+	message  interface{}
 }
 
 // NewExitError makes a new *ExitError
-func NewExitError(message string, exitCode int) *ExitError {
+func NewExitError(message interface{}, exitCode int) *ExitError {
 	return &ExitError{
 		exitCode: exitCode,
 		message:  message,
@@ -58,7 +62,7 @@
 // Error returns the string message, fulfilling the interface required by
 // `error`
 func (ee *ExitError) Error() string {
-	return ee.message
+	return fmt.Sprintf("%v", ee.message)
 }
 
 // ExitCode returns the exit code, fulfilling the interface required by
@@ -78,7 +82,11 @@
 
 	if exitErr, ok := err.(ExitCoder); ok {
 		if err.Error() != "" {
-			fmt.Fprintln(ErrWriter, err)
+			if _, ok := exitErr.(ErrorFormatter); ok {
+				fmt.Fprintf(ErrWriter, "%+v\n", err)
+			} else {
+				fmt.Fprintln(ErrWriter, err)
+			}
 		}
 		OsExiter(exitErr.ExitCode())
 		return
@@ -88,5 +96,15 @@
 		for _, merr := range multiErr.Errors {
 			HandleExitCoder(merr)
 		}
+		return
 	}
+
+	if err.Error() != "" {
+		if _, ok := err.(ErrorFormatter); ok {
+			fmt.Fprintf(ErrWriter, "%+v\n", err)
+		} else {
+			fmt.Fprintln(ErrWriter, err)
+		}
+	}
+	OsExiter(1)
 }
diff --git a/vendor/github.com/codegangsta/cli/errors_test.go b/vendor/github.com/codegangsta/cli/errors_test.go
index 8f5f284..131bd38 100644
--- a/vendor/github.com/codegangsta/cli/errors_test.go
+++ b/vendor/github.com/codegangsta/cli/errors_test.go
@@ -1,8 +1,9 @@
 package cli
 
 import (
+	"bytes"
 	"errors"
-	"os"
+	"fmt"
 	"testing"
 )
 
@@ -15,7 +16,7 @@
 		called = true
 	}
 
-	defer func() { OsExiter = os.Exit }()
+	defer func() { OsExiter = fakeOsExiter }()
 
 	HandleExitCoder(nil)
 
@@ -32,7 +33,7 @@
 		called = true
 	}
 
-	defer func() { OsExiter = os.Exit }()
+	defer func() { OsExiter = fakeOsExiter }()
 
 	HandleExitCoder(NewExitError("galactic perimeter breach", 9))
 
@@ -49,7 +50,7 @@
 		called = true
 	}
 
-	defer func() { OsExiter = os.Exit }()
+	defer func() { OsExiter = fakeOsExiter }()
 
 	exitErr := NewExitError("galactic perimeter breach", 9)
 	err := NewMultiError(errors.New("wowsa"), errors.New("egad"), exitErr)
@@ -58,3 +59,99 @@
 	expect(t, exitCode, 9)
 	expect(t, called, true)
 }
+
+func TestHandleExitCoder_ErrorWithMessage(t *testing.T) {
+	exitCode := 0
+	called := false
+
+	OsExiter = func(rc int) {
+		exitCode = rc
+		called = true
+	}
+	ErrWriter = &bytes.Buffer{}
+
+	defer func() {
+		OsExiter = fakeOsExiter
+		ErrWriter = fakeErrWriter
+	}()
+
+	err := errors.New("gourd havens")
+	HandleExitCoder(err)
+
+	expect(t, exitCode, 1)
+	expect(t, called, true)
+	expect(t, ErrWriter.(*bytes.Buffer).String(), "gourd havens\n")
+}
+
+func TestHandleExitCoder_ErrorWithoutMessage(t *testing.T) {
+	exitCode := 0
+	called := false
+
+	OsExiter = func(rc int) {
+		exitCode = rc
+		called = true
+	}
+	ErrWriter = &bytes.Buffer{}
+
+	defer func() {
+		OsExiter = fakeOsExiter
+		ErrWriter = fakeErrWriter
+	}()
+
+	err := errors.New("")
+	HandleExitCoder(err)
+
+	expect(t, exitCode, 1)
+	expect(t, called, true)
+	expect(t, ErrWriter.(*bytes.Buffer).String(), "")
+}
+
+// make a stub to not import pkg/errors
+type ErrorWithFormat struct {
+	error
+}
+
+func NewErrorWithFormat(m string) *ErrorWithFormat {
+	return &ErrorWithFormat{error: errors.New(m)}
+}
+
+func (f *ErrorWithFormat) Format(s fmt.State, verb rune) {
+	fmt.Fprintf(s, "This the format: %v", f.error)
+}
+
+func TestHandleExitCoder_ErrorWithFormat(t *testing.T) {
+	called := false
+
+	OsExiter = func(rc int) {
+		called = true
+	}
+	ErrWriter = &bytes.Buffer{}
+
+	defer func() {
+		OsExiter = fakeOsExiter
+		ErrWriter = fakeErrWriter
+	}()
+
+	err := NewErrorWithFormat("I am formatted")
+	HandleExitCoder(err)
+
+	expect(t, called, true)
+	expect(t, ErrWriter.(*bytes.Buffer).String(), "This the format: I am formatted\n")
+}
+
+func TestHandleExitCoder_MultiErrorWithFormat(t *testing.T) {
+	called := false
+
+	OsExiter = func(rc int) {
+		called = true
+	}
+	ErrWriter = &bytes.Buffer{}
+
+	defer func() { OsExiter = fakeOsExiter }()
+
+	err := NewMultiError(NewErrorWithFormat("err1"), NewErrorWithFormat("err2"))
+	HandleExitCoder(err)
+
+	expect(t, called, true)
+	expect(t, ErrWriter.(*bytes.Buffer).String(), "This the format: err1\nThis the format: err2\n")
+}
diff --git a/vendor/github.com/codegangsta/cli/flag-types.json b/vendor/github.com/codegangsta/cli/flag-types.json
new file mode 100644
index 0000000..1223107
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/flag-types.json
@@ -0,0 +1,93 @@
+[
+  {
+    "name": "Bool",
+    "type": "bool",
+    "value": false,
+    "context_default": "false",
+    "parser": "strconv.ParseBool(f.Value.String())"
+  },
+  {
+    "name": "BoolT",
+    "type": "bool",
+    "value": false,
+    "doctail": " that is true by default",
+    "context_default": "false",
+    "parser": "strconv.ParseBool(f.Value.String())"
+  },
+  {
+    "name": "Duration",
+    "type": "time.Duration",
+    "doctail": " (see https://golang.org/pkg/time/#ParseDuration)",
+    "context_default": "0",
+    "parser": "time.ParseDuration(f.Value.String())"
+  },
+  {
+    "name": "Float64",
+    "type": "float64",
+    "context_default": "0",
+    "parser": "strconv.ParseFloat(f.Value.String(), 64)"
+  },
+  {
+    "name": "Generic",
+    "type": "Generic",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "interface{}"
+  },
+  {
+    "name": "Int64",
+    "type": "int64",
+    "context_default": "0",
+    "parser": "strconv.ParseInt(f.Value.String(), 0, 64)"
+  },
+  {
+    "name": "Int",
+    "type": "int",
+    "context_default": "0",
+    "parser": "strconv.ParseInt(f.Value.String(), 0, 64)",
+    "parser_cast": "int(parsed)"
+  },
+  {
+    "name": "IntSlice",
+    "type": "*IntSlice",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "[]int",
+    "parser": "(f.Value.(*IntSlice)).Value(), error(nil)"
+  },
+  {
+    "name": "Int64Slice",
+    "type": "*Int64Slice",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "[]int64",
+    "parser": "(f.Value.(*Int64Slice)).Value(), error(nil)"
+  },
+  {
+    "name": "String",
+    "type": "string",
+    "context_default": "\"\"",
+    "parser": "f.Value.String(), error(nil)"
+  },
+  {
+    "name": "StringSlice",
+    "type": "*StringSlice",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "[]string",
+    "parser": "(f.Value.(*StringSlice)).Value(), error(nil)"
+  },
+  {
+    "name": "Uint64",
+    "type": "uint64",
+    "context_default": "0",
+    "parser": "strconv.ParseUint(f.Value.String(), 0, 64)"
+  },
+  {
+    "name": "Uint",
+    "type": "uint",
+    "context_default": "0",
+    "parser": "strconv.ParseUint(f.Value.String(), 0, 64)",
+    "parser_cast": "uint(parsed)"
+  }
+]
diff --git a/vendor/github.com/codegangsta/cli/flag.go b/vendor/github.com/codegangsta/cli/flag.go
index f8a28d1..7dd8a2c 100644
--- a/vendor/github.com/codegangsta/cli/flag.go
+++ b/vendor/github.com/codegangsta/cli/flag.go
@@ -3,11 +3,11 @@
 import (
 	"flag"
 	"fmt"
-	"os"
 	"reflect"
 	"runtime"
 	"strconv"
 	"strings"
+	"syscall"
 	"time"
 )
 
@@ -37,6 +37,21 @@
 // to display a flag.
 var FlagStringer FlagStringFunc = stringifyFlag
 
+// FlagsByName is a slice of Flag.
+type FlagsByName []Flag
+
+func (f FlagsByName) Len() int {
+	return len(f)
+}
+
+func (f FlagsByName) Less(i, j int) bool {
+	return f[i].GetName() < f[j].GetName()
+}
+
+func (f FlagsByName) Swap(i, j int) {
+	f[i], f[j] = f[j], f[i]
+}
+
 // 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.
@@ -47,13 +62,29 @@
 	GetName() string
 }
 
-func flagSet(name string, flags []Flag) *flag.FlagSet {
+// errorableFlag is an interface that allows us to return errors during apply
+// it allows flags defined in this library to return errors in a fashion backwards compatible
+// TODO remove in v2 and modify the existing Flag interface to return errors
+type errorableFlag interface {
+	Flag
+
+	ApplyWithError(*flag.FlagSet) error
+}
+
+func flagSet(name string, flags []Flag) (*flag.FlagSet, error) {
 	set := flag.NewFlagSet(name, flag.ContinueOnError)
 
 	for _, f := range flags {
-		f.Apply(set)
+		//TODO remove in v2 when errorableFlag is removed
+		if ef, ok := f.(errorableFlag); ok {
+			if err := ef.ApplyWithError(set); err != nil {
+				return nil, err
+			}
+		} else {
+			f.Apply(set)
+		}
 	}
-	return set
+	return set, nil
 }
 
 func eachName(longName string, fn func(string)) {
@@ -70,31 +101,24 @@
 	String() string
 }
 
-// GenericFlag is the flag type for types implementing Generic
-type GenericFlag struct {
-	Name   string
-	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 FlagStringer(f)
-}
-
 // Apply takes the flagset and calls Set on the generic flag with the value
 // provided by the user for parsing by the flag
+// Ignores parsing errors
 func (f GenericFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError takes the flagset and calls Set on the generic flag with the value
+// provided by the user for parsing by the flag
+func (f GenericFlag) ApplyWithError(set *flag.FlagSet) error {
 	val := f.Value
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
-				val.Set(envVal)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				if err := val.Set(envVal); err != nil {
+					return fmt.Errorf("could not parse %s as value for flag %s: %s", envVal, f.Name, err)
+				}
 				break
 			}
 		}
@@ -103,14 +127,11 @@
 	eachName(f.Name, func(name string) {
 		set.Var(f.Value, name, f.Usage)
 	})
+
+	return nil
 }
 
-// GetName returns the name of a flag.
-func (f GenericFlag) GetName() string {
-	return f.Name
-}
-
-// StringSlice is an opaque type for []string to satisfy flag.Value
+// StringSlice is an opaque type for []string to satisfy flag.Value and flag.Getter
 type StringSlice []string
 
 // Set appends the string value to the list of values
@@ -129,31 +150,29 @@
 	return *f
 }
 
-// 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 {
-	return FlagStringer(f)
+// Get returns the slice of strings set by this flag
+func (f *StringSlice) Get() interface{} {
+	return *f
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f StringSliceFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				newVal := &StringSlice{}
 				for _, s := range strings.Split(envVal, ",") {
 					s = strings.TrimSpace(s)
-					newVal.Set(s)
+					if err := newVal.Set(s); err != nil {
+						return fmt.Errorf("could not parse %s as string value for flag %s: %s", envVal, f.Name, err)
+					}
 				}
 				f.Value = newVal
 				break
@@ -167,14 +186,11 @@
 		}
 		set.Var(f.Value, name, f.Usage)
 	})
+
+	return nil
 }
 
-// GetName returns the name of a flag.
-func (f StringSliceFlag) GetName() string {
-	return f.Name
-}
-
-// IntSlice is an opaque type for []int to satisfy flag.Value
+// IntSlice is an opaque type for []int to satisfy flag.Value and flag.Getter
 type IntSlice []int
 
 // Set parses the value into an integer and appends it to the list of values
@@ -197,33 +213,28 @@
 	return *f
 }
 
-// IntSliceFlag is an int flag that can be specified multiple times on the
-// command-line
-type IntSliceFlag struct {
-	Name   string
-	Value  *IntSlice
-	Usage  string
-	EnvVar string
-	Hidden bool
-}
-
-// String returns the usage
-func (f IntSliceFlag) String() string {
-	return FlagStringer(f)
+// Get returns the slice of ints set by this flag
+func (f *IntSlice) Get() interface{} {
+	return *f
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f IntSliceFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				newVal := &IntSlice{}
 				for _, s := range strings.Split(envVal, ",") {
 					s = strings.TrimSpace(s)
-					err := newVal.Set(s)
-					if err != nil {
-						fmt.Fprintf(ErrWriter, err.Error())
+					if err := newVal.Set(s); err != nil {
+						return fmt.Errorf("could not parse %s as int slice value for flag %s: %s", envVal, f.Name, err)
 					}
 				}
 				f.Value = newVal
@@ -238,14 +249,11 @@
 		}
 		set.Var(f.Value, name, f.Usage)
 	})
+
+	return nil
 }
 
-// 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
+// Int64Slice is an opaque type for []int to satisfy flag.Value and flag.Getter
 type Int64Slice []int64
 
 // Set parses the value into an integer and appends it to the list of values
@@ -268,33 +276,28 @@
 	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)
+// Get returns the slice of ints set by this flag
+func (f *Int64Slice) Get() interface{} {
+	return *f
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f Int64SliceFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				newVal := &Int64Slice{}
 				for _, s := range strings.Split(envVal, ",") {
 					s = strings.TrimSpace(s)
-					err := newVal.Set(s)
-					if err != nil {
-						fmt.Fprintf(ErrWriter, err.Error())
+					if err := newVal.Set(s); err != nil {
+						return fmt.Errorf("could not parse %s as int64 slice value for flag %s: %s", envVal, f.Name, err)
 					}
 				}
 				f.Value = newVal
@@ -309,38 +312,33 @@
 		}
 		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 FlagStringer(f)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f BoolFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f BoolFlag) ApplyWithError(set *flag.FlagSet) error {
 	val := false
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
-				envValBool, err := strconv.ParseBool(envVal)
-				if err == nil {
-					val = envValBool
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				if envVal == "" {
+					val = false
+					break
 				}
+
+				envValBool, err := strconv.ParseBool(envVal)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				val = envValBool
 				break
 			}
 		}
@@ -353,40 +351,35 @@
 		}
 		set.Bool(name, val, f.Usage)
 	})
-}
 
-// GetName returns the name of the flag.
-func (f BoolFlag) GetName() string {
-	return f.Name
-}
-
-// BoolTFlag this represents a boolean flag that is true by default, but can
-// still be set to false by --some-flag=false
-type BoolTFlag struct {
-	Name        string
-	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 FlagStringer(f)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f BoolTFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f BoolTFlag) ApplyWithError(set *flag.FlagSet) error {
 	val := true
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
-				envValBool, err := strconv.ParseBool(envVal)
-				if err == nil {
-					val = envValBool
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				if envVal == "" {
+					val = false
 					break
 				}
+
+				envValBool, err := strconv.ParseBool(envVal)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				val = envValBool
+				break
 			}
 		}
 	}
@@ -398,34 +391,22 @@
 		}
 		set.Bool(name, val, f.Usage)
 	})
-}
 
-// GetName returns the name of the flag.
-func (f BoolTFlag) GetName() string {
-	return f.Name
-}
-
-// StringFlag represents a flag that takes as string value
-type StringFlag struct {
-	Name        string
-	Value       string
-	Usage       string
-	EnvVar      string
-	Destination *string
-	Hidden      bool
-}
-
-// String returns the usage
-func (f StringFlag) String() string {
-	return FlagStringer(f)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f StringFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				f.Value = envVal
 				break
 			}
@@ -439,39 +420,28 @@
 		}
 		set.String(name, f.Value, f.Usage)
 	})
-}
 
-// GetName returns the name of the flag.
-func (f StringFlag) GetName() string {
-	return f.Name
-}
-
-// IntFlag is a flag that takes an integer
-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 FlagStringer(f)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f IntFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f IntFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				envValInt, err := strconv.ParseInt(envVal, 0, 64)
-				if err == nil {
-					f.Value = int(envValInt)
-					break
+				if err != nil {
+					return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
 				}
+				f.Value = int(envValInt)
+				break
 			}
 		}
 	}
@@ -483,39 +453,29 @@
 		}
 		set.Int(name, f.Value, f.Usage)
 	})
-}
 
-// 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)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f Int64Flag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Int64Flag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				envValInt, err := strconv.ParseInt(envVal, 0, 64)
-				if err == nil {
-					f.Value = envValInt
-					break
+				if err != nil {
+					return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
 				}
+
+				f.Value = envValInt
+				break
 			}
 		}
 	}
@@ -527,39 +487,29 @@
 		}
 		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)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f UintFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f UintFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				envValInt, err := strconv.ParseUint(envVal, 0, 64)
-				if err == nil {
-					f.Value = uint(envValInt)
-					break
+				if err != nil {
+					return fmt.Errorf("could not parse %s as uint value for flag %s: %s", envVal, f.Name, err)
 				}
+
+				f.Value = uint(envValInt)
+				break
 			}
 		}
 	}
@@ -571,39 +521,29 @@
 		}
 		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)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f Uint64Flag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				envValInt, err := strconv.ParseUint(envVal, 0, 64)
-				if err == nil {
-					f.Value = uint64(envValInt)
-					break
+				if err != nil {
+					return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
 				}
+
+				f.Value = uint64(envValInt)
+				break
 			}
 		}
 	}
@@ -615,40 +555,29 @@
 		}
 		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 {
-	Name        string
-	Value       time.Duration
-	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 FlagStringer(f)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f DurationFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f DurationFlag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				envValDuration, err := time.ParseDuration(envVal)
-				if err == nil {
-					f.Value = envValDuration
-					break
+				if err != nil {
+					return fmt.Errorf("could not parse %s as duration for flag %s: %s", envVal, f.Name, err)
 				}
+
+				f.Value = envValDuration
+				break
 			}
 		}
 	}
@@ -660,38 +589,29 @@
 		}
 		set.Duration(name, f.Value, f.Usage)
 	})
-}
 
-// GetName returns the name of the flag.
-func (f DurationFlag) GetName() string {
-	return f.Name
-}
-
-// Float64Flag is a flag that takes an float value
-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 FlagStringer(f)
+	return nil
 }
 
 // Apply populates the flag given the flag set and environment
+// Ignores errors
 func (f Float64Flag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Float64Flag) ApplyWithError(set *flag.FlagSet) error {
 	if f.EnvVar != "" {
 		for _, envVar := range strings.Split(f.EnvVar, ",") {
 			envVar = strings.TrimSpace(envVar)
-			if envVal := os.Getenv(envVar); envVal != "" {
+			if envVal, ok := syscall.Getenv(envVar); ok {
 				envValFloat, err := strconv.ParseFloat(envVal, 10)
-				if err == nil {
-					f.Value = float64(envValFloat)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
 				}
+
+				f.Value = float64(envValFloat)
+				break
 			}
 		}
 	}
@@ -703,11 +623,8 @@
 		}
 		set.Float64(name, f.Value, f.Usage)
 	})
-}
 
-// GetName returns the name of the flag.
-func (f Float64Flag) GetName() string {
-	return f.Name
+	return nil
 }
 
 func visibleFlags(fl []Flag) []Flag {
diff --git a/vendor/github.com/codegangsta/cli/flag_generated.go b/vendor/github.com/codegangsta/cli/flag_generated.go
new file mode 100644
index 0000000..491b619
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/flag_generated.go
@@ -0,0 +1,627 @@
+package cli
+
+import (
+	"flag"
+	"strconv"
+	"time"
+)
+
+// WARNING: This file is generated!
+
+// BoolFlag is a flag with type bool
+type BoolFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Destination *bool
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f BoolFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f BoolFlag) GetName() string {
+	return f.Name
+}
+
+// Bool looks up the value of a local BoolFlag, returns
+// false if not found
+func (c *Context) Bool(name string) bool {
+	return lookupBool(name, c.flagSet)
+}
+
+// GlobalBool looks up the value of a global BoolFlag, returns
+// false if not found
+func (c *Context) GlobalBool(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBool(name, fs)
+	}
+	return false
+}
+
+func lookupBool(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}
+
+// BoolTFlag is a flag with type bool that is true by default
+type BoolTFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Destination *bool
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f BoolTFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f BoolTFlag) GetName() string {
+	return f.Name
+}
+
+// BoolT looks up the value of a local BoolTFlag, returns
+// false if not found
+func (c *Context) BoolT(name string) bool {
+	return lookupBoolT(name, c.flagSet)
+}
+
+// GlobalBoolT looks up the value of a global BoolTFlag, returns
+// false if not found
+func (c *Context) GlobalBoolT(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBoolT(name, fs)
+	}
+	return false
+}
+
+func lookupBoolT(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}
+
+// DurationFlag is a flag with type time.Duration (see https://golang.org/pkg/time/#ParseDuration)
+type DurationFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       time.Duration
+	Destination *time.Duration
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f DurationFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f DurationFlag) GetName() string {
+	return f.Name
+}
+
+// Duration looks up the value of a local DurationFlag, returns
+// 0 if not found
+func (c *Context) Duration(name string) time.Duration {
+	return lookupDuration(name, c.flagSet)
+}
+
+// GlobalDuration looks up the value of a global DurationFlag, returns
+// 0 if not found
+func (c *Context) GlobalDuration(name string) time.Duration {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupDuration(name, fs)
+	}
+	return 0
+}
+
+func lookupDuration(name string, set *flag.FlagSet) time.Duration {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := time.ParseDuration(f.Value.String())
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// Float64Flag is a flag with type float64
+type Float64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       float64
+	Destination *float64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Float64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Float64Flag) GetName() string {
+	return f.Name
+}
+
+// Float64 looks up the value of a local Float64Flag, returns
+// 0 if not found
+func (c *Context) Float64(name string) float64 {
+	return lookupFloat64(name, c.flagSet)
+}
+
+// GlobalFloat64 looks up the value of a global Float64Flag, returns
+// 0 if not found
+func (c *Context) GlobalFloat64(name string) float64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupFloat64(name, fs)
+	}
+	return 0
+}
+
+func lookupFloat64(name string, set *flag.FlagSet) float64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseFloat(f.Value.String(), 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// GenericFlag is a flag with type Generic
+type GenericFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  Generic
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f GenericFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f GenericFlag) GetName() string {
+	return f.Name
+}
+
+// Generic looks up the value of a local GenericFlag, returns
+// nil if not found
+func (c *Context) Generic(name string) interface{} {
+	return lookupGeneric(name, c.flagSet)
+}
+
+// GlobalGeneric looks up the value of a global GenericFlag, returns
+// nil if not found
+func (c *Context) GlobalGeneric(name string) interface{} {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupGeneric(name, fs)
+	}
+	return nil
+}
+
+func lookupGeneric(name string, set *flag.FlagSet) interface{} {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value, error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// Int64Flag is a flag with type int64
+type Int64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       int64
+	Destination *int64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Int64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Int64Flag) GetName() string {
+	return f.Name
+}
+
+// Int64 looks up the value of a local Int64Flag, returns
+// 0 if not found
+func (c *Context) Int64(name string) int64 {
+	return lookupInt64(name, c.flagSet)
+}
+
+// GlobalInt64 looks up the value of a global Int64Flag, returns
+// 0 if not found
+func (c *Context) GlobalInt64(name string) int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64(name, fs)
+	}
+	return 0
+}
+
+func lookupInt64(name string, set *flag.FlagSet) int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// IntFlag is a flag with type int
+type IntFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       int
+	Destination *int
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f IntFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f IntFlag) GetName() string {
+	return f.Name
+}
+
+// Int looks up the value of a local IntFlag, returns
+// 0 if not found
+func (c *Context) Int(name string) int {
+	return lookupInt(name, c.flagSet)
+}
+
+// GlobalInt looks up the value of a global IntFlag, returns
+// 0 if not found
+func (c *Context) GlobalInt(name string) int {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt(name, fs)
+	}
+	return 0
+}
+
+func lookupInt(name string, set *flag.FlagSet) int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return int(parsed)
+	}
+	return 0
+}
+
+// IntSliceFlag is a flag with type *IntSlice
+type IntSliceFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  *IntSlice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f IntSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f IntSliceFlag) GetName() string {
+	return f.Name
+}
+
+// IntSlice looks up the value of a local IntSliceFlag, returns
+// nil if not found
+func (c *Context) IntSlice(name string) []int {
+	return lookupIntSlice(name, c.flagSet)
+}
+
+// GlobalIntSlice looks up the value of a global IntSliceFlag, returns
+// nil if not found
+func (c *Context) GlobalIntSlice(name string) []int {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupIntSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupIntSlice(name string, set *flag.FlagSet) []int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*IntSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// Int64SliceFlag is a flag with type *Int64Slice
+type Int64SliceFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  *Int64Slice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Int64SliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Int64SliceFlag) GetName() string {
+	return f.Name
+}
+
+// Int64Slice looks up the value of a local Int64SliceFlag, returns
+// nil if not found
+func (c *Context) Int64Slice(name string) []int64 {
+	return lookupInt64Slice(name, c.flagSet)
+}
+
+// GlobalInt64Slice looks up the value of a global Int64SliceFlag, returns
+// nil if not found
+func (c *Context) GlobalInt64Slice(name string) []int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64Slice(name, fs)
+	}
+	return nil
+}
+
+func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*Int64Slice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// StringFlag is a flag with type string
+type StringFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       string
+	Destination *string
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f StringFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f StringFlag) GetName() string {
+	return f.Name
+}
+
+// String looks up the value of a local StringFlag, returns
+// "" if not found
+func (c *Context) String(name string) string {
+	return lookupString(name, c.flagSet)
+}
+
+// GlobalString looks up the value of a global StringFlag, returns
+// "" if not found
+func (c *Context) GlobalString(name string) string {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupString(name, fs)
+	}
+	return ""
+}
+
+func lookupString(name string, set *flag.FlagSet) string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value.String(), error(nil)
+		if err != nil {
+			return ""
+		}
+		return parsed
+	}
+	return ""
+}
+
+// StringSliceFlag is a flag with type *StringSlice
+type StringSliceFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  *StringSlice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f StringSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f StringSliceFlag) GetName() string {
+	return f.Name
+}
+
+// StringSlice looks up the value of a local StringSliceFlag, returns
+// nil if not found
+func (c *Context) StringSlice(name string) []string {
+	return lookupStringSlice(name, c.flagSet)
+}
+
+// GlobalStringSlice looks up the value of a global StringSliceFlag, returns
+// nil if not found
+func (c *Context) GlobalStringSlice(name string) []string {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupStringSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupStringSlice(name string, set *flag.FlagSet) []string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*StringSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// Uint64Flag is a flag with type uint64
+type Uint64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       uint64
+	Destination *uint64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Uint64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Uint64Flag) GetName() string {
+	return f.Name
+}
+
+// Uint64 looks up the value of a local Uint64Flag, returns
+// 0 if not found
+func (c *Context) Uint64(name string) uint64 {
+	return lookupUint64(name, c.flagSet)
+}
+
+// GlobalUint64 looks up the value of a global Uint64Flag, returns
+// 0 if not found
+func (c *Context) GlobalUint64(name string) uint64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint64(name, fs)
+	}
+	return 0
+}
+
+func lookupUint64(name string, set *flag.FlagSet) uint64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// UintFlag is a flag with type uint
+type UintFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       uint
+	Destination *uint
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f UintFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f UintFlag) GetName() string {
+	return f.Name
+}
+
+// Uint looks up the value of a local UintFlag, returns
+// 0 if not found
+func (c *Context) Uint(name string) uint {
+	return lookupUint(name, c.flagSet)
+}
+
+// GlobalUint looks up the value of a global UintFlag, returns
+// 0 if not found
+func (c *Context) GlobalUint(name string) uint {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint(name, fs)
+	}
+	return 0
+}
+
+func lookupUint(name string, set *flag.FlagSet) uint {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return uint(parsed)
+	}
+	return 0
+}
diff --git a/vendor/github.com/codegangsta/cli/flag_test.go b/vendor/github.com/codegangsta/cli/flag_test.go
index a7afcc4..0dd8654 100644
--- a/vendor/github.com/codegangsta/cli/flag_test.go
+++ b/vendor/github.com/codegangsta/cli/flag_test.go
@@ -29,6 +29,81 @@
 	}
 }
 
+func TestFlagsFromEnv(t *testing.T) {
+	var flagTests = []struct {
+		input  string
+		output interface{}
+		flag   Flag
+		err    error
+	}{
+		{"", false, BoolFlag{Name: "debug", EnvVar: "DEBUG"}, nil},
+		{"1", true, BoolFlag{Name: "debug", EnvVar: "DEBUG"}, nil},
+		{"false", false, BoolFlag{Name: "debug", EnvVar: "DEBUG"}, nil},
+		{"foobar", true, BoolFlag{Name: "debug", EnvVar: "DEBUG"}, fmt.Errorf(`could not parse foobar as bool value for flag debug: strconv.ParseBool: parsing "foobar": invalid syntax`)},
+
+		{"", false, BoolTFlag{Name: "debug", EnvVar: "DEBUG"}, nil},
+		{"1", true, BoolTFlag{Name: "debug", EnvVar: "DEBUG"}, nil},
+		{"false", false, BoolTFlag{Name: "debug", EnvVar: "DEBUG"}, nil},
+		{"foobar", true, BoolTFlag{Name: "debug", EnvVar: "DEBUG"}, fmt.Errorf(`could not parse foobar as bool value for flag debug: strconv.ParseBool: parsing "foobar": invalid syntax`)},
+
+		{"1s", 1 * time.Second, DurationFlag{Name: "time", EnvVar: "TIME"}, nil},
+		{"foobar", false, DurationFlag{Name: "time", EnvVar: "TIME"}, fmt.Errorf(`could not parse foobar as duration for flag time: time: invalid duration foobar`)},
+
+		{"1.2", 1.2, Float64Flag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1", 1.0, Float64Flag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"foobar", 0, Float64Flag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as float64 value for flag seconds: strconv.ParseFloat: parsing "foobar": invalid syntax`)},
+
+		{"1", int64(1), Int64Flag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1.2", 0, Int64Flag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse 1.2 as int value for flag seconds: strconv.ParseInt: parsing "1.2": invalid syntax`)},
+		{"foobar", 0, Int64Flag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as int value for flag seconds: strconv.ParseInt: parsing "foobar": invalid syntax`)},
+
+		{"1", 1, IntFlag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1.2", 0, IntFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse 1.2 as int value for flag seconds: strconv.ParseInt: parsing "1.2": invalid syntax`)},
+		{"foobar", 0, IntFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as int value for flag seconds: strconv.ParseInt: parsing "foobar": invalid syntax`)},
+
+		{"1,2", IntSlice{1, 2}, IntSliceFlag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1.2,2", IntSlice{}, IntSliceFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse 1.2,2 as int slice value for flag seconds: strconv.ParseInt: parsing "1.2": invalid syntax`)},
+		{"foobar", IntSlice{}, IntSliceFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as int slice value for flag seconds: strconv.ParseInt: parsing "foobar": invalid syntax`)},
+
+		{"1,2", Int64Slice{1, 2}, Int64SliceFlag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1.2,2", Int64Slice{}, Int64SliceFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse 1.2,2 as int64 slice value for flag seconds: strconv.ParseInt: parsing "1.2": invalid syntax`)},
+		{"foobar", Int64Slice{}, Int64SliceFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as int64 slice value for flag seconds: strconv.ParseInt: parsing "foobar": invalid syntax`)},
+
+		{"foo", "foo", StringFlag{Name: "name", EnvVar: "NAME"}, nil},
+
+		{"foo,bar", StringSlice{"foo", "bar"}, StringSliceFlag{Name: "names", EnvVar: "NAMES"}, nil},
+
+		{"1", uint(1), UintFlag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1.2", 0, UintFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse 1.2 as uint value for flag seconds: strconv.ParseUint: parsing "1.2": invalid syntax`)},
+		{"foobar", 0, UintFlag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as uint value for flag seconds: strconv.ParseUint: parsing "foobar": invalid syntax`)},
+
+		{"1", uint64(1), Uint64Flag{Name: "seconds", EnvVar: "SECONDS"}, nil},
+		{"1.2", 0, Uint64Flag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse 1.2 as uint64 value for flag seconds: strconv.ParseUint: parsing "1.2": invalid syntax`)},
+		{"foobar", 0, Uint64Flag{Name: "seconds", EnvVar: "SECONDS"}, fmt.Errorf(`could not parse foobar as uint64 value for flag seconds: strconv.ParseUint: parsing "foobar": invalid syntax`)},
+
+		{"foo,bar", &Parser{"foo", "bar"}, GenericFlag{Name: "names", Value: &Parser{}, EnvVar: "NAMES"}, nil},
+	}
+
+	for _, test := range flagTests {
+		os.Clearenv()
+		os.Setenv(reflect.ValueOf(test.flag).FieldByName("EnvVar").String(), test.input)
+		a := App{
+			Flags: []Flag{test.flag},
+			Action: func(ctx *Context) error {
+				if !reflect.DeepEqual(ctx.value(test.flag.GetName()), test.output) {
+					t.Errorf("expected %+v to be parsed as %+v, instead was %+v", test.input, test.output, ctx.value(test.flag.GetName()))
+				}
+				return nil
+			},
+		}
+
+		err := a.Run([]string{"run"})
+		if !reflect.DeepEqual(test.err, err) {
+			t.Errorf("expected error %s, got error %s", test.err, err)
+		}
+	}
+}
+
 var stringFlagTests = []struct {
 	name     string
 	usage    string
@@ -941,6 +1016,38 @@
 	a.Run([]string{"run"})
 }
 
+func TestParseBoolTFromEnv(t *testing.T) {
+	var boolTFlagTests = []struct {
+		input  string
+		output bool
+	}{
+		{"", false},
+		{"1", true},
+		{"false", false},
+		{"true", true},
+	}
+
+	for _, test := range boolTFlagTests {
+		os.Clearenv()
+		os.Setenv("DEBUG", test.input)
+		a := App{
+			Flags: []Flag{
+				BoolTFlag{Name: "debug, d", EnvVar: "DEBUG"},
+			},
+			Action: func(ctx *Context) error {
+				if ctx.Bool("debug") != test.output {
+					t.Errorf("expected %+v to be parsed as %+v, instead was %+v", test.input, test.output, ctx.Bool("debug"))
+				}
+				if ctx.Bool("d") != test.output {
+					t.Errorf("expected %+v to be parsed as %+v, instead was %+v", test.input, test.output, ctx.Bool("d"))
+				}
+				return nil
+			},
+		}
+		a.Run([]string{"run"})
+	}
+}
+
 func TestParseMultiBoolT(t *testing.T) {
 	a := App{
 		Flags: []Flag{
@@ -1036,6 +1143,10 @@
 	return fmt.Sprintf("%s,%s", p[0], p[1])
 }
 
+func (p *Parser) Get() interface{} {
+	return p
+}
+
 func TestParseGeneric(t *testing.T) {
 	a := App{
 		Flags: []Flag{
diff --git a/vendor/github.com/codegangsta/cli/generate-flag-types b/vendor/github.com/codegangsta/cli/generate-flag-types
new file mode 100755
index 0000000..7147381
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/generate-flag-types
@@ -0,0 +1,255 @@
+#!/usr/bin/env python
+"""
+The flag types that ship with the cli library have many things in common, and
+so we can take advantage of the `go generate` command to create much of the
+source code from a list of definitions.  These definitions attempt to cover
+the parts that vary between flag types, and should evolve as needed.
+
+An example of the minimum definition needed is:
+
+    {
+      "name": "SomeType",
+      "type": "sometype",
+      "context_default": "nil"
+    }
+
+In this example, the code generated for the `cli` package will include a type
+named `SomeTypeFlag` that is expected to wrap a value of type `sometype`.
+Fetching values by name via `*cli.Context` will default to a value of `nil`.
+
+A more complete, albeit somewhat redundant, example showing all available
+definition keys is:
+
+    {
+      "name": "VeryMuchType",
+      "type": "*VeryMuchType",
+      "value": true,
+      "dest": false,
+      "doctail": " which really only wraps a []float64, oh well!",
+      "context_type": "[]float64",
+      "context_default": "nil",
+      "parser": "parseVeryMuchType(f.Value.String())",
+      "parser_cast": "[]float64(parsed)"
+    }
+
+The meaning of each field is as follows:
+
+               name (string) - The type "name", which will be suffixed with
+                               `Flag` when generating the type definition
+                               for `cli` and the wrapper type for `altsrc`
+               type (string) - The type that the generated `Flag` type for `cli`
+                               is expected to "contain" as its `.Value` member
+                value (bool) - Should the generated `cli` type have a `Value`
+                               member?
+                 dest (bool) - Should the generated `cli` type support a
+                               destination pointer?
+            doctail (string) - Additional docs for the `cli` flag type comment
+       context_type (string) - The literal type used in the `*cli.Context`
+                               reader func signature
+    context_default (string) - The literal value used as the default by the
+                               `*cli.Context` reader funcs when no value is
+                               present
+             parser (string) - Literal code used to parse the flag `f`,
+                               expected to have a return signature of
+                               (value, error)
+        parser_cast (string) - Literal code used to cast the `parsed` value
+                               returned from the `parser` code
+"""
+
+from __future__ import print_function, unicode_literals
+
+import argparse
+import json
+import os
+import subprocess
+import sys
+import tempfile
+import textwrap
+
+
+class _FancyFormatter(argparse.ArgumentDefaultsHelpFormatter,
+                      argparse.RawDescriptionHelpFormatter):
+    pass
+
+
+def main(sysargs=sys.argv[:]):
+    parser = argparse.ArgumentParser(
+        description='Generate flag type code!',
+        formatter_class=_FancyFormatter)
+    parser.add_argument(
+        'package',
+        type=str, default='cli', choices=_WRITEFUNCS.keys(),
+        help='Package for which flag types will be generated'
+    )
+    parser.add_argument(
+        '-i', '--in-json',
+        type=argparse.FileType('r'),
+        default=sys.stdin,
+        help='Input JSON file which defines each type to be generated'
+    )
+    parser.add_argument(
+        '-o', '--out-go',
+        type=argparse.FileType('w'),
+        default=sys.stdout,
+        help='Output file/stream to which generated source will be written'
+    )
+    parser.epilog = __doc__
+
+    args = parser.parse_args(sysargs[1:])
+    _generate_flag_types(_WRITEFUNCS[args.package], args.out_go, args.in_json)
+    return 0
+
+
+def _generate_flag_types(writefunc, output_go, input_json):
+    types = json.load(input_json)
+
+    tmp = tempfile.NamedTemporaryFile(suffix='.go', delete=False)
+    writefunc(tmp, types)
+    tmp.close()
+
+    new_content = subprocess.check_output(
+        ['goimports', tmp.name]
+    ).decode('utf-8')
+
+    print(new_content, file=output_go, end='')
+    output_go.flush()
+    os.remove(tmp.name)
+
+
+def _set_typedef_defaults(typedef):
+    typedef.setdefault('doctail', '')
+    typedef.setdefault('context_type', typedef['type'])
+    typedef.setdefault('dest', True)
+    typedef.setdefault('value', True)
+    typedef.setdefault('parser', 'f.Value, error(nil)')
+    typedef.setdefault('parser_cast', 'parsed')
+
+
+def _write_cli_flag_types(outfile, types):
+    _fwrite(outfile, """\
+        package cli
+
+        // WARNING: This file is generated!
+
+        """)
+
+    for typedef in types:
+        _set_typedef_defaults(typedef)
+
+        _fwrite(outfile, """\
+        // {name}Flag is a flag with type {type}{doctail}
+        type {name}Flag struct {{
+            Name string
+            Usage string
+            EnvVar string
+            Hidden bool
+        """.format(**typedef))
+
+        if typedef['value']:
+            _fwrite(outfile, """\
+            Value {type}
+            """.format(**typedef))
+
+        if typedef['dest']:
+            _fwrite(outfile, """\
+            Destination *{type}
+            """.format(**typedef))
+
+        _fwrite(outfile, "\n}\n\n")
+
+        _fwrite(outfile, """\
+            // String returns a readable representation of this value
+            // (for usage defaults)
+            func (f {name}Flag) String() string {{
+                return FlagStringer(f)
+            }}
+
+            // GetName returns the name of the flag
+            func (f {name}Flag) GetName() string {{
+                return f.Name
+            }}
+
+            // {name} looks up the value of a local {name}Flag, returns
+            // {context_default} if not found
+            func (c *Context) {name}(name string) {context_type} {{
+                return lookup{name}(name, c.flagSet)
+            }}
+
+            // Global{name} looks up the value of a global {name}Flag, returns
+            // {context_default} if not found
+            func (c *Context) Global{name}(name string) {context_type} {{
+                if fs := lookupGlobalFlagSet(name, c); fs != nil {{
+                    return lookup{name}(name, fs)
+                }}
+                return {context_default}
+            }}
+
+            func lookup{name}(name string, set *flag.FlagSet) {context_type} {{
+                f := set.Lookup(name)
+                if f != nil {{
+                    parsed, err := {parser}
+                    if err != nil {{
+                        return {context_default}
+                    }}
+                    return {parser_cast}
+                }}
+                return {context_default}
+            }}
+            """.format(**typedef))
+
+
+def _write_altsrc_flag_types(outfile, types):
+    _fwrite(outfile, """\
+        package altsrc
+
+        import (
+            "gopkg.in/urfave/cli.v1"
+        )
+
+        // WARNING: This file is generated!
+
+        """)
+
+    for typedef in types:
+        _set_typedef_defaults(typedef)
+
+        _fwrite(outfile, """\
+        // {name}Flag is the flag type that wraps cli.{name}Flag to allow
+        // for other values to be specified
+        type {name}Flag struct {{
+            cli.{name}Flag
+            set *flag.FlagSet
+        }}
+
+        // New{name}Flag creates a new {name}Flag
+        func New{name}Flag(fl cli.{name}Flag) *{name}Flag {{
+            return &{name}Flag{{{name}Flag: fl, set: nil}}
+        }}
+
+        // Apply saves the flagSet for later usage calls, then calls the
+        // wrapped {name}Flag.Apply
+        func (f *{name}Flag) Apply(set *flag.FlagSet) {{
+            f.set = set
+            f.{name}Flag.Apply(set)
+        }}
+
+        // ApplyWithError saves the flagSet for later usage calls, then calls the
+        // wrapped {name}Flag.ApplyWithError
+        func (f *{name}Flag) ApplyWithError(set *flag.FlagSet) error {{
+            f.set = set
+            return f.{name}Flag.ApplyWithError(set)
+        }}
+        """.format(**typedef))
+
+
+def _fwrite(outfile, text):
+    print(textwrap.dedent(text), end='', file=outfile)
+
+
+_WRITEFUNCS = {
+    'cli': _write_cli_flag_types,
+    'altsrc': _write_altsrc_flag_types
+}
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/vendor/github.com/codegangsta/cli/help.go b/vendor/github.com/codegangsta/cli/help.go
index 0f4cf14..c8c1aee 100644
--- a/vendor/github.com/codegangsta/cli/help.go
+++ b/vendor/github.com/codegangsta/cli/help.go
@@ -13,27 +13,31 @@
 // cli.go uses text/template to render templates. You can
 // render custom help text by setting this variable.
 var AppHelpTemplate = `NAME:
-   {{.Name}} - {{.Usage}}
+   {{.Name}}{{if .Usage}} - {{.Usage}}{{end}}
 
 USAGE:
-   {{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}}
+   {{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 .VisibleCommands}}
+   {{.Version}}{{end}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if len .Authors}}
+
+AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
+   {{range $index, $author := .Authors}}{{if $index}}
+   {{end}}{{$author}}{{end}}{{end}}{{if .VisibleCommands}}
+
 COMMANDS:{{range .VisibleCategories}}{{if .Name}}
    {{.Name}}:{{end}}{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
-{{end}}{{end}}{{if .VisibleFlags}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+
 GLOBAL OPTIONS:
-   {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}{{if .Copyright}}
+   {{range $index, $option := .VisibleFlags}}{{if $index}}
+   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+
 COPYRIGHT:
-   {{.Copyright}}
-   {{end}}
+   {{.Copyright}}{{end}}
 `
 
 // CommandHelpTemplate is the text template for the command help topic.
@@ -240,7 +244,7 @@
 }
 
 func checkSubcommandHelp(c *Context) bool {
-	if c.GlobalBool("h") || c.GlobalBool("help") {
+	if c.Bool("h") || c.Bool("help") {
 		ShowSubcommandHelp(c)
 		return true
 	}
@@ -248,20 +252,43 @@
 	return false
 }
 
-func checkCompletions(c *Context) bool {
-	if (c.GlobalBool(BashCompletionFlag.Name) || c.Bool(BashCompletionFlag.Name)) && c.App.EnableBashCompletion {
-		ShowCompletions(c)
-		return true
+func checkShellCompleteFlag(a *App, arguments []string) (bool, []string) {
+	if !a.EnableBashCompletion {
+		return false, arguments
 	}
 
-	return false
+	pos := len(arguments) - 1
+	lastArg := arguments[pos]
+
+	if lastArg != "--"+BashCompletionFlag.Name {
+		return false, arguments
+	}
+
+	return true, arguments[:pos]
+}
+
+func checkCompletions(c *Context) bool {
+	if !c.shellComplete {
+		return false
+	}
+
+	if args := c.Args(); args.Present() {
+		name := args.First()
+		if cmd := c.App.Command(name); cmd != nil {
+			// let the command handle the completion
+			return false
+		}
+	}
+
+	ShowCompletions(c)
+	return true
 }
 
 func checkCommandCompletions(c *Context, name string) bool {
-	if c.Bool(BashCompletionFlag.Name) && c.App.EnableBashCompletion {
-		ShowCommandCompletions(c, name)
-		return true
+	if !c.shellComplete {
+		return false
 	}
 
-	return false
+	ShowCommandCompletions(c, name)
+	return true
 }
diff --git a/vendor/github.com/codegangsta/cli/helpers_unix_test.go b/vendor/github.com/codegangsta/cli/helpers_unix_test.go
new file mode 100644
index 0000000..ae27fc5
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/helpers_unix_test.go
@@ -0,0 +1,9 @@
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package cli
+
+import "os"
+
+func clearenv() {
+	os.Clearenv()
+}
diff --git a/vendor/github.com/codegangsta/cli/helpers_windows_test.go b/vendor/github.com/codegangsta/cli/helpers_windows_test.go
new file mode 100644
index 0000000..4eb84f9
--- /dev/null
+++ b/vendor/github.com/codegangsta/cli/helpers_windows_test.go
@@ -0,0 +1,20 @@
+package cli
+
+import (
+	"os"
+	"syscall"
+)
+
+// os.Clearenv() doesn't actually unset variables on Windows
+// See: https://github.com/golang/go/issues/17902
+func clearenv() {
+	for _, s := range os.Environ() {
+		for j := 1; j < len(s); j++ {
+			if s[j] == '=' {
+				keyp, _ := syscall.UTF16PtrFromString(s[0:j])
+				syscall.SetEnvironmentVariable(keyp, nil)
+				break
+			}
+		}
+	}
+}
diff --git a/vendor/github.com/codegangsta/cli/runtests b/vendor/github.com/codegangsta/cli/runtests
index 0a7b483..ee22bde 100755
--- a/vendor/github.com/codegangsta/cli/runtests
+++ b/vendor/github.com/codegangsta/cli/runtests
@@ -18,8 +18,9 @@
     targets = {
         'vet': _vet,
         'test': _test,
-        'gfmxr': _gfmxr,
+        'gfmrun': _gfmrun,
         'toc': _toc,
+        'gen': _gen,
     }
 
     parser = argparse.ArgumentParser()
@@ -34,7 +35,7 @@
 
 def _test():
     if check_output('go version'.split()).split()[2] < 'go1.2':
-        _run('go test -v .'.split())
+        _run('go test -v .')
         return
 
     coverprofiles = []
@@ -51,29 +52,45 @@
         ])
 
     combined_name = _combine_coverprofiles(coverprofiles)
-    _run('go tool cover -func={}'.format(combined_name).split())
+    _run('go tool cover -func={}'.format(combined_name))
     os.remove(combined_name)
 
 
-def _gfmxr():
-    _run(['gfmxr', '-c', str(_gfmxr_count()), '-s', 'README.md'])
+def _gfmrun():
+    go_version = check_output('go version'.split()).split()[2]
+    if go_version < 'go1.3':
+        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
+        return
+    _run(['gfmrun', '-c', str(_gfmrun_count()), '-s', 'README.md'])
 
 
 def _vet():
-    _run('go vet ./...'.split())
+    _run('go vet ./...')
 
 
 def _toc():
-    _run(['node_modules/.bin/markdown-toc', '-i', 'README.md'])
-    _run(['git', 'diff', '--quiet'])
+    _run('node_modules/.bin/markdown-toc -i README.md')
+    _run('git diff --exit-code')
+
+
+def _gen():
+    go_version = check_output('go version'.split()).split()[2]
+    if go_version < 'go1.5':
+        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
+        return
+
+    _run('go generate ./...')
+    _run('git diff --exit-code')
 
 
 def _run(command):
+    if hasattr(command, 'split'):
+        command = command.split()
     print('runtests: {}'.format(' '.join(command)), file=sys.stderr)
     check_call(command)
 
 
-def _gfmxr_count():
+def _gfmrun_count():
     with open('README.md') as infile:
         lines = infile.read().splitlines()
         return len(filter(_is_go_runnable, lines))
diff --git a/vendor/github.com/mitchellh/go-homedir/LICENSE b/vendor/github.com/mitchellh/go-homedir/LICENSE
new file mode 100644
index 0000000..f9c841a
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Mitchell Hashimoto
+
+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.
diff --git a/vendor/github.com/mitchellh/go-homedir/README.md b/vendor/github.com/mitchellh/go-homedir/README.md
new file mode 100644
index 0000000..d70706d
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/README.md
@@ -0,0 +1,14 @@
+# go-homedir
+
+This is a Go library for detecting the user's home directory without
+the use of cgo, so the library can be used in cross-compilation environments.
+
+Usage is incredibly simple, just call `homedir.Dir()` to get the home directory
+for a user, and `homedir.Expand()` to expand the `~` in a path to the home
+directory.
+
+**Why not just use `os/user`?** The built-in `os/user` package requires
+cgo on Darwin systems. This means that any Go code that uses that package
+cannot cross compile. But 99% of the time the use for `os/user` is just to
+retrieve the home directory, which we can do for the current user without
+cgo. This library does that, enabling cross-compilation.
diff --git a/vendor/github.com/mitchellh/go-homedir/homedir.go b/vendor/github.com/mitchellh/go-homedir/homedir.go
new file mode 100644
index 0000000..47e1f9e
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/homedir.go
@@ -0,0 +1,137 @@
+package homedir
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+// DisableCache will disable caching of the home directory. Caching is enabled
+// by default.
+var DisableCache bool
+
+var homedirCache string
+var cacheLock sync.RWMutex
+
+// Dir returns the home directory for the executing user.
+//
+// This uses an OS-specific method for discovering the home directory.
+// An error is returned if a home directory cannot be detected.
+func Dir() (string, error) {
+	if !DisableCache {
+		cacheLock.RLock()
+		cached := homedirCache
+		cacheLock.RUnlock()
+		if cached != "" {
+			return cached, nil
+		}
+	}
+
+	cacheLock.Lock()
+	defer cacheLock.Unlock()
+
+	var result string
+	var err error
+	if runtime.GOOS == "windows" {
+		result, err = dirWindows()
+	} else {
+		// Unix-like system, so just assume Unix
+		result, err = dirUnix()
+	}
+
+	if err != nil {
+		return "", err
+	}
+	homedirCache = result
+	return result, nil
+}
+
+// Expand expands the path to include the home directory if the path
+// is prefixed with `~`. If it isn't prefixed with `~`, the path is
+// returned as-is.
+func Expand(path string) (string, error) {
+	if len(path) == 0 {
+		return path, nil
+	}
+
+	if path[0] != '~' {
+		return path, nil
+	}
+
+	if len(path) > 1 && path[1] != '/' && path[1] != '\\' {
+		return "", errors.New("cannot expand user-specific home dir")
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(dir, path[1:]), nil
+}
+
+func dirUnix() (string, error) {
+	// First prefer the HOME environmental variable
+	if home := os.Getenv("HOME"); home != "" {
+		return home, nil
+	}
+
+	// If that fails, try getent
+	var stdout bytes.Buffer
+	cmd := exec.Command("getent", "passwd", strconv.Itoa(os.Getuid()))
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		// If the error is ErrNotFound, we ignore it. Otherwise, return it.
+		if err != exec.ErrNotFound {
+			return "", err
+		}
+	} else {
+		if passwd := strings.TrimSpace(stdout.String()); passwd != "" {
+			// username:password:uid:gid:gecos:home:shell
+			passwdParts := strings.SplitN(passwd, ":", 7)
+			if len(passwdParts) > 5 {
+				return passwdParts[5], nil
+			}
+		}
+	}
+
+	// If all else fails, try the shell
+	stdout.Reset()
+	cmd = exec.Command("sh", "-c", "cd && pwd")
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return "", err
+	}
+
+	result := strings.TrimSpace(stdout.String())
+	if result == "" {
+		return "", errors.New("blank output when reading home directory")
+	}
+
+	return result, nil
+}
+
+func dirWindows() (string, error) {
+	// First prefer the HOME environmental variable
+	if home := os.Getenv("HOME"); home != "" {
+		return home, nil
+	}
+
+	drive := os.Getenv("HOMEDRIVE")
+	path := os.Getenv("HOMEPATH")
+	home := drive + path
+	if drive == "" || path == "" {
+		home = os.Getenv("USERPROFILE")
+	}
+	if home == "" {
+		return "", errors.New("HOMEDRIVE, HOMEPATH, and USERPROFILE are blank")
+	}
+
+	return home, nil
+}
diff --git a/vendor/github.com/mitchellh/go-homedir/homedir_test.go b/vendor/github.com/mitchellh/go-homedir/homedir_test.go
new file mode 100644
index 0000000..e4054e7
--- /dev/null
+++ b/vendor/github.com/mitchellh/go-homedir/homedir_test.go
@@ -0,0 +1,112 @@
+package homedir
+
+import (
+	"os"
+	"os/user"
+	"path/filepath"
+	"testing"
+)
+
+func patchEnv(key, value string) func() {
+	bck := os.Getenv(key)
+	deferFunc := func() {
+		os.Setenv(key, bck)
+	}
+
+	os.Setenv(key, value)
+	return deferFunc
+}
+
+func BenchmarkDir(b *testing.B) {
+	// We do this for any "warmups"
+	for i := 0; i < 10; i++ {
+		Dir()
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		Dir()
+	}
+}
+
+func TestDir(t *testing.T) {
+	u, err := user.Current()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if u.HomeDir != dir {
+		t.Fatalf("%#v != %#v", u.HomeDir, dir)
+	}
+}
+
+func TestExpand(t *testing.T) {
+	u, err := user.Current()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	cases := []struct {
+		Input  string
+		Output string
+		Err    bool
+	}{
+		{
+			"/foo",
+			"/foo",
+			false,
+		},
+
+		{
+			"~/foo",
+			filepath.Join(u.HomeDir, "foo"),
+			false,
+		},
+
+		{
+			"",
+			"",
+			false,
+		},
+
+		{
+			"~",
+			u.HomeDir,
+			false,
+		},
+
+		{
+			"~foo/foo",
+			"",
+			true,
+		},
+	}
+
+	for _, tc := range cases {
+		actual, err := Expand(tc.Input)
+		if (err != nil) != tc.Err {
+			t.Fatalf("Input: %#v\n\nErr: %s", tc.Input, err)
+		}
+
+		if actual != tc.Output {
+			t.Fatalf("Input: %#v\n\nOutput: %#v", tc.Input, actual)
+		}
+	}
+
+	DisableCache = true
+	defer func() { DisableCache = false }()
+	defer patchEnv("HOME", "/custom/path/")()
+	expected := filepath.Join("/", "custom", "path", "foo/bar")
+	actual, err := Expand("~/foo/bar")
+
+	if err != nil {
+		t.Errorf("No error is expected, got: %v", err)
+	} else if actual != expected {
+		t.Errorf("Expected: %v; actual: %v", expected, actual)
+	}
+}
diff --git a/vendor/gopkg.in/yaml.v2/README.md b/vendor/gopkg.in/yaml.v2/README.md
index 7b8bd86..1884de6 100644
--- a/vendor/gopkg.in/yaml.v2/README.md
+++ b/vendor/gopkg.in/yaml.v2/README.md
@@ -42,7 +42,7 @@
 License
 -------
 
-The yaml package is licensed under the LGPL with an exception that allows it to be linked statically. Please see the LICENSE file for details.
+The yaml package is licensed under the Apache License 2.0. Please see the LICENSE file for details.
 
 
 Example
diff --git a/vendor/gopkg.in/yaml.v2/decode.go b/vendor/gopkg.in/yaml.v2/decode.go
index 085cddc..b13ab9f 100644
--- a/vendor/gopkg.in/yaml.v2/decode.go
+++ b/vendor/gopkg.in/yaml.v2/decode.go
@@ -251,7 +251,7 @@
 //
 // If n holds a null value, prepare returns before doing anything.
 func (d *decoder) prepare(n *node, out reflect.Value) (newout reflect.Value, unmarshaled, good bool) {
-	if n.tag == yaml_NULL_TAG || n.kind == scalarNode && n.tag == "" && (n.value == "null" || n.value == "") {
+	if n.tag == yaml_NULL_TAG || n.kind == scalarNode && n.tag == "" && (n.value == "null" || n.value == "" && n.implicit) {
 		return out, false, false
 	}
 	again := true
diff --git a/vendor/gopkg.in/yaml.v2/decode_test.go b/vendor/gopkg.in/yaml.v2/decode_test.go
index c159760..3da6fad 100644
--- a/vendor/gopkg.in/yaml.v2/decode_test.go
+++ b/vendor/gopkg.in/yaml.v2/decode_test.go
@@ -660,6 +660,7 @@
 	{`_: BAR!`, "!!str", "BAR!"},
 	{`_: "BAR!"`, "!!str", "BAR!"},
 	{"_: !!foo 'BAR!'", "!!foo", "BAR!"},
+	{`_: ""`, "!!str", ""},
 }
 
 var unmarshalerResult = map[int]error{}