cfg/lock.go - third_party/Masterminds/glide - Git at Google

 package cfg

 import (
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
 	"io/ioutil"
 	"sort"
 	"strings"
 	"time"

 	"github.com/sdboyer/gps"

 	"gopkg.in/yaml.v2"
 )

 // Lockfile represents a glide.lock file.
 type Lockfile struct {
 	Hash       string    `yaml:"hash"`
 	Updated    time.Time `yaml:"updated"`
 	Imports    Locks     `yaml:"imports"`
 	DevImports Locks     `yaml:"testImports"` // TODO remove and fold in as prop
 }

 // LockfileFromSolverLock transforms a gps.Lock into a glide *Lockfile.
 func LockfileFromSolverLock(r gps.Lock) (*Lockfile, error) {
 	if r == nil {
 		return nil, fmt.Errorf("no gps lock data provided to transform")
 	}

 	// Create and write out a new lock file from the result
 	lf := &Lockfile{
 		Hash:    hex.EncodeToString(r.InputHash()),
 		Updated: time.Now(),
 	}

 	for _, p := range r.Projects() {
 		pi := p.Ident()
 		l := &Lock{
 			Name: string(pi.ProjectRoot),
 		}

 		if l.Name != pi.NetworkName && pi.NetworkName != "" {
 			l.Repository = pi.NetworkName
 		}

 		v := p.Version()
 		// There's (currently) no way gps can emit a non-paired version in a
 		// solution, so this unchecked type assertion should be safe.
 		//
 		// TODO might still be better to check and return out with an err if
 		// not, though
 		switch tv := v.(type) {
 		case gps.Revision:
 			l.Revision = tv.String()
 		case gps.PairedVersion:
 			l.Revision = v.(gps.PairedVersion).Underlying().String()
 			switch v.Type() {
 			case "branch":
 				l.Branch = v.String()
 			case "semver", "version":
 				l.Version = v.String()
 			}
 		case gps.UnpairedVersion:
 			// this should not be possible - error if we hit it
 			return nil, fmt.Errorf("should not be possible - gps returned an unpaired version for %s", pi)
 		}

 		lf.Imports = append(lf.Imports, l)
 	}

 	return lf, nil
 }

 // LockfileFromYaml returns an instance of Lockfile from YAML
 func LockfileFromYaml(yml []byte) (*Lockfile, bool, error) {
 	lock := &Lockfile{}
 	err := yaml.Unmarshal([]byte(yml), lock)
 	if err == nil {
 		return lock, false, nil
 	}

 	llock := &lLockfile1{}
 	err2 := yaml.Unmarshal([]byte(yml), llock)
 	if err2 != nil {
 		return nil, false, err2
 	}
 	return llock.Convert(), true, nil
 }

 // Marshal converts a Lockfile instance to YAML
 func (lf *Lockfile) Marshal() ([]byte, error) {
 	sort.Sort(lf.Imports)
 	sort.Sort(lf.DevImports)
 	yml, err := yaml.Marshal(&lf)
 	if err != nil {
 		return []byte{}, err
 	}
 	return yml, nil
 }

 // MarshalYAML is a hook for gopkg.in/yaml.v2.
 // It sorts import subpackages lexicographically for reproducibility.
 func (lf *Lockfile) MarshalYAML() (interface{}, error) {
 	// Ensure elements on testImport don't already exist on import.
 	var newDI Locks
 	var found bool
 	for _, imp := range lf.DevImports {
 		found = false
 		for i := 0; i < len(lf.Imports); i++ {
 			if lf.Imports[i].Name == imp.Name {
 				found = true
 				if lf.Imports[i].Version != imp.Version {
 					return lf, fmt.Errorf("Generating lock YAML produced conflicting versions of %s. import (%s), testImport (%s)", imp.Name, lf.Imports[i].Version, imp.Version)
 				}
 			}
 		}

 		if !found {
 			newDI = append(newDI, imp)
 		}
 	}
 	lf.DevImports = newDI

 	return lf, nil
 }

 // WriteFile writes a Glide lock file.
 //
 // This is a convenience function that marshals the YAML and then writes it to
 // the given file. If the file exists, it will be clobbered.
 func (lf *Lockfile) WriteFile(lockpath string) error {
 	o, err := lf.Marshal()
 	if err != nil {
 		return err
 	}
 	return ioutil.WriteFile(lockpath, o, 0666)
 }

 // InputHash returns the hash of the input arguments that resulted in this lock
 // file.
 func (lf *Lockfile) InputHash() []byte {
 	b, err := hex.DecodeString(lf.Hash)
 	if err != nil {
 		return nil
 	}
 	return b
 }

 // Projects returns the list of projects enumerated in the lock file.
 func (lf *Lockfile) Projects() []gps.LockedProject {
 	all := append(lf.Imports, lf.DevImports...)
 	lp := make([]gps.LockedProject, len(all))

 	for k, l := range all {
 		r := gps.Revision(l.Revision)

 		var v gps.Version
 		if l.Version != "" {
 			v = gps.NewVersion(l.Version).Is(r)
 		} else if l.Branch != "" {
 			v = gps.NewBranch(l.Branch).Is(r)
 		} else {
 			v = r
 		}

 		id := gps.ProjectIdentifier{
 			ProjectRoot: gps.ProjectRoot(l.Name),
 			NetworkName: l.Repository,
 		}
 		lp[k] = gps.NewLockedProject(id, v, nil)
 	}

 	return lp
 }

 // Clone returns a clone of Lockfile
 func (lf *Lockfile) Clone() *Lockfile {
 	n := &Lockfile{}
 	n.Hash = lf.Hash
 	n.Updated = lf.Updated
 	n.Imports = lf.Imports.Clone()
 	n.DevImports = lf.DevImports.Clone()

 	return n
 }

 // Fingerprint returns a hash of the contents minus the date. This allows for
 // two lockfiles to be compared irrespective of their updated times.
 // TODO remove, or seriously re-adapt
 func (lf *Lockfile) Fingerprint() ([32]byte, error) {
 	c := lf.Clone()
 	c.Updated = time.Time{} // Set the time to be the nil equivalent
 	sort.Sort(c.Imports)
 	sort.Sort(c.DevImports)
 	yml, err := c.Marshal()
 	if err != nil {
 		return [32]byte{}, err
 	}

 	return sha256.Sum256(yml), nil
 }

 // ReadLockFile loads the contents of a glide.lock file.
 func ReadLockFile(lockpath string) (*Lockfile, error) {
 	yml, err := ioutil.ReadFile(lockpath)
 	if err != nil {
 		return nil, err
 	}
 	lock, _, err := LockfileFromYaml(yml)
 	if err != nil {
 		return nil, err
 	}
 	return lock, nil
 }

 // Locks is a slice of locked dependencies.
 type Locks []*Lock

 // Clone returns a Clone of Locks.
 func (l Locks) Clone() Locks {
 	n := make(Locks, 0, len(l))
 	for _, v := range l {
 		n = append(n, v.Clone())
 	}
 	return n
 }

 // Len returns the length of the Locks. This is needed for sorting with
 // the sort package.
 func (l Locks) Len() int {
 	return len(l)
 }

 // Less is needed for the sort interface. It compares two locks based on
 // their name.
 func (l Locks) Less(i, j int) bool {

 	// Names are normalized to lowercase because case affects sorting order. For
 	// example, Masterminds comes before kylelemons. Making them lowercase
 	// causes kylelemons to come first which is what is expected.
 	return strings.ToLower(l[i].Name) < strings.ToLower(l[j].Name)
 }

 // Swap is needed for the sort interface. It swaps the position of two
 // locks.
 func (l Locks) Swap(i, j int) {
 	l[i], l[j] = l[j], l[i]
 }

 // Lock represents an individual locked dependency.
 type Lock struct {
 	Name       string `yaml:"name"`
 	Version    string `yaml:"version,omitempty"`
 	Branch     string `yaml:"branch,omitempty"`
 	Revision   string `yaml:"revision"`
 	Repository string `yaml:"repo,omitempty"`
 }

 func (l *Lock) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	nl := struct {
 		Name       string `yaml:"name"`
 		Version    string `yaml:"version,omitempty"`
 		Branch     string `yaml:"branch,omitempty"`
 		Revision   string `yaml:"revision"`
 		Repository string `yaml:"repo,omitempty"`
 	}{}

 	err := unmarshal(&nl)
 	if err != nil {
 		return err
 	}

 	// If Revision field is empty, then we can be certain this is either a
 	// legacy file, or just plain invalid
 	if nl.Revision == "" {
 		return fmt.Errorf("dependency %s is missing a revision; is this a legacy glide.lock file?", nl.Name)
 	}

 	l.Name = nl.Name
 	l.Version = nl.Version
 	l.Branch = nl.Branch
 	l.Revision = nl.Revision
 	l.Repository = nl.Repository

 	return nil
 }

 // Clone creates a clone of a Lock.
 func (l *Lock) Clone() *Lock {
 	var l2 Lock
 	l2 = *l
 	return &l2
 }

 // LockFromDependency converts a Dependency to a Lock
 // TODO remove
 func LockFromDependency(dep *Dependency) *Lock {
 	l := &Lock{
 		Name:       dep.Name,
 		Repository: dep.Repository,
 	}

 	return l
 }

 // NewLockfile is used to create an instance of Lockfile.
 // TODO remove
 func NewLockfile(ds, tds Dependencies, hash string) (*Lockfile, error) {
 	lf := &Lockfile{
 		Hash:       hash,
 		Updated:    time.Now(),
 		Imports:    make([]*Lock, len(ds)),
 		DevImports: make([]*Lock, 0),
 	}

 	for i := 0; i < len(ds); i++ {
 		lf.Imports[i] = LockFromDependency(ds[i])
 	}

 	sort.Sort(lf.Imports)

 	var found bool
 	for i := 0; i < len(tds); i++ {
 		found = false
 		for ii := 0; ii < len(ds); ii++ {
 			if ds[ii].Name == tds[i].Name {
 				found = true
 				if ds[ii].ConstraintsEq(*tds[i]) {
 					return &Lockfile{}, fmt.Errorf("Generating lock produced conflicting versions of %s. import (%s), testImport (%s)", tds[i].Name, ds[ii].GetConstraint(), tds[i].GetConstraint())
 				}
 				break
 			}
 		}
 		if !found {
 			lf.DevImports = append(lf.DevImports, LockFromDependency(tds[i]))
 		}
 	}

 	sort.Sort(lf.DevImports)

 	return lf, nil
 }

 // LockfileFromMap takes a map of dependencies and generates a lock Lockfile instance.
 // TODO remove
 func LockfileFromMap(ds map[string]*Dependency, hash string) *Lockfile {
 	lf := &Lockfile{
 		Hash:    hash,
 		Updated: time.Now(),
 		Imports: make([]*Lock, len(ds)),
 	}

 	i := 0
 	for name, dep := range ds {
 		lf.Imports[i] = LockFromDependency(dep)
 		lf.Imports[i].Name = name
 		i++
 	}

 	sort.Sort(lf.Imports)

 	return lf
 }
	package cfg

	import (
	"crypto/sha256"
	"encoding/hex"
	"fmt"
	"io/ioutil"
	"sort"
	"strings"
	"time"

	"github.com/sdboyer/gps"

	"gopkg.in/yaml.v2"
	)

	// Lockfile represents a glide.lock file.
	type Lockfile struct {
	Hash string `yaml:"hash"`
	Updated time.Time `yaml:"updated"`
	Imports Locks `yaml:"imports"`
	DevImports Locks `yaml:"testImports"` // TODO remove and fold in as prop
	}

	// LockfileFromSolverLock transforms a gps.Lock into a glide *Lockfile.
	func LockfileFromSolverLock(r gps.Lock) (*Lockfile, error) {
	if r == nil {
	return nil, fmt.Errorf("no gps lock data provided to transform")
	}

	// Create and write out a new lock file from the result
	lf := &Lockfile{
	Hash: hex.EncodeToString(r.InputHash()),
	Updated: time.Now(),
	}

	for _, p := range r.Projects() {
	pi := p.Ident()
	l := &Lock{
	Name: string(pi.ProjectRoot),
	}

	if l.Name != pi.NetworkName && pi.NetworkName != "" {
	l.Repository = pi.NetworkName
	}

	v := p.Version()
	// There's (currently) no way gps can emit a non-paired version in a
	// solution, so this unchecked type assertion should be safe.
	//
	// TODO might still be better to check and return out with an err if
	// not, though
	switch tv := v.(type) {
	case gps.Revision:
	l.Revision = tv.String()
	case gps.PairedVersion:
	l.Revision = v.(gps.PairedVersion).Underlying().String()
	switch v.Type() {
	case "branch":
	l.Branch = v.String()
	case "semver", "version":
	l.Version = v.String()
	}
	case gps.UnpairedVersion:
	// this should not be possible - error if we hit it
	return nil, fmt.Errorf("should not be possible - gps returned an unpaired version for %s", pi)
	}

	lf.Imports = append(lf.Imports, l)
	}

	return lf, nil
	}

	// LockfileFromYaml returns an instance of Lockfile from YAML
	func LockfileFromYaml(yml []byte) (*Lockfile, bool, error) {
	lock := &Lockfile{}
	err := yaml.Unmarshal([]byte(yml), lock)
	if err == nil {
	return lock, false, nil
	}

	llock := &lLockfile1{}
	err2 := yaml.Unmarshal([]byte(yml), llock)
	if err2 != nil {
	return nil, false, err2
	}
	return llock.Convert(), true, nil
	}

	// Marshal converts a Lockfile instance to YAML
	func (lf *Lockfile) Marshal() ([]byte, error) {
	sort.Sort(lf.Imports)
	sort.Sort(lf.DevImports)
	yml, err := yaml.Marshal(&lf)
	if err != nil {
	return []byte{}, err
	}
	return yml, nil
	}

	// MarshalYAML is a hook for gopkg.in/yaml.v2.
	// It sorts import subpackages lexicographically for reproducibility.
	func (lf *Lockfile) MarshalYAML() (interface{}, error) {
	// Ensure elements on testImport don't already exist on import.
	var newDI Locks
	var found bool
	for _, imp := range lf.DevImports {
	found = false
	for i := 0; i < len(lf.Imports); i++ {
	if lf.Imports[i].Name == imp.Name {
	found = true
	if lf.Imports[i].Version != imp.Version {
	return lf, fmt.Errorf("Generating lock YAML produced conflicting versions of %s. import (%s), testImport (%s)", imp.Name, lf.Imports[i].Version, imp.Version)
	}
	}
	}

	if !found {
	newDI = append(newDI, imp)
	}
	}
	lf.DevImports = newDI

	return lf, nil
	}

	// WriteFile writes a Glide lock file.
	//
	// This is a convenience function that marshals the YAML and then writes it to
	// the given file. If the file exists, it will be clobbered.
	func (lf *Lockfile) WriteFile(lockpath string) error {
	o, err := lf.Marshal()
	if err != nil {
	return err
	}
	return ioutil.WriteFile(lockpath, o, 0666)
	}

	// InputHash returns the hash of the input arguments that resulted in this lock
	// file.
	func (lf *Lockfile) InputHash() []byte {
	b, err := hex.DecodeString(lf.Hash)
	if err != nil {
	return nil
	}
	return b
	}

	// Projects returns the list of projects enumerated in the lock file.
	func (lf *Lockfile) Projects() []gps.LockedProject {
	all := append(lf.Imports, lf.DevImports...)
	lp := make([]gps.LockedProject, len(all))

	for k, l := range all {
	r := gps.Revision(l.Revision)

	var v gps.Version
	if l.Version != "" {
	v = gps.NewVersion(l.Version).Is(r)
	} else if l.Branch != "" {
	v = gps.NewBranch(l.Branch).Is(r)
	} else {
	v = r
	}

	id := gps.ProjectIdentifier{
	ProjectRoot: gps.ProjectRoot(l.Name),
	NetworkName: l.Repository,
	}
	lp[k] = gps.NewLockedProject(id, v, nil)
	}

	return lp
	}

	// Clone returns a clone of Lockfile
	func (lf Lockfile) Clone() Lockfile {
	n := &Lockfile{}
	n.Hash = lf.Hash
	n.Updated = lf.Updated
	n.Imports = lf.Imports.Clone()
	n.DevImports = lf.DevImports.Clone()

	return n
	}

	// Fingerprint returns a hash of the contents minus the date. This allows for
	// two lockfiles to be compared irrespective of their updated times.
	// TODO remove, or seriously re-adapt
	func (lf *Lockfile) Fingerprint() ([32]byte, error) {
	c := lf.Clone()
	c.Updated = time.Time{} // Set the time to be the nil equivalent
	sort.Sort(c.Imports)
	sort.Sort(c.DevImports)
	yml, err := c.Marshal()
	if err != nil {
	return [32]byte{}, err
	}

	return sha256.Sum256(yml), nil
	}

	// ReadLockFile loads the contents of a glide.lock file.
	func ReadLockFile(lockpath string) (*Lockfile, error) {
	yml, err := ioutil.ReadFile(lockpath)
	if err != nil {
	return nil, err
	}
	lock, _, err := LockfileFromYaml(yml)
	if err != nil {
	return nil, err
	}
	return lock, nil
	}

	// Locks is a slice of locked dependencies.
	type Locks []*Lock

	// Clone returns a Clone of Locks.
	func (l Locks) Clone() Locks {
	n := make(Locks, 0, len(l))
	for _, v := range l {
	n = append(n, v.Clone())
	}
	return n
	}

	// Len returns the length of the Locks. This is needed for sorting with
	// the sort package.
	func (l Locks) Len() int {
	return len(l)
	}

	// Less is needed for the sort interface. It compares two locks based on
	// their name.
	func (l Locks) Less(i, j int) bool {

	// Names are normalized to lowercase because case affects sorting order. For
	// example, Masterminds comes before kylelemons. Making them lowercase
	// causes kylelemons to come first which is what is expected.
	return strings.ToLower(l[i].Name) < strings.ToLower(l[j].Name)
	}

	// Swap is needed for the sort interface. It swaps the position of two
	// locks.
	func (l Locks) Swap(i, j int) {
	l[i], l[j] = l[j], l[i]
	}

	// Lock represents an individual locked dependency.
	type Lock struct {
	Name string `yaml:"name"`
	Version string `yaml:"version,omitempty"`
	Branch string `yaml:"branch,omitempty"`
	Revision string `yaml:"revision"`
	Repository string `yaml:"repo,omitempty"`
	}

	func (l *Lock) UnmarshalYAML(unmarshal func(interface{}) error) error {
	nl := struct {
	Name string `yaml:"name"`
	Version string `yaml:"version,omitempty"`
	Branch string `yaml:"branch,omitempty"`
	Revision string `yaml:"revision"`
	Repository string `yaml:"repo,omitempty"`
	}{}

	err := unmarshal(&nl)
	if err != nil {
	return err
	}

	// If Revision field is empty, then we can be certain this is either a
	// legacy file, or just plain invalid
	if nl.Revision == "" {
	return fmt.Errorf("dependency %s is missing a revision; is this a legacy glide.lock file?", nl.Name)
	}

	l.Name = nl.Name
	l.Version = nl.Version
	l.Branch = nl.Branch
	l.Revision = nl.Revision
	l.Repository = nl.Repository

	return nil
	}

	// Clone creates a clone of a Lock.
	func (l Lock) Clone() Lock {
	var l2 Lock
	l2 = *l
	return &l2
	}

	// LockFromDependency converts a Dependency to a Lock
	// TODO remove
	func LockFromDependency(dep Dependency) Lock {
	l := &Lock{
	Name: dep.Name,
	Repository: dep.Repository,
	}

	return l
	}

	// NewLockfile is used to create an instance of Lockfile.
	// TODO remove
	func NewLockfile(ds, tds Dependencies, hash string) (*Lockfile, error) {
	lf := &Lockfile{
	Hash: hash,
	Updated: time.Now(),
	Imports: make([]*Lock, len(ds)),
	DevImports: make([]*Lock, 0),
	}

	for i := 0; i < len(ds); i++ {
	lf.Imports[i] = LockFromDependency(ds[i])
	}

	sort.Sort(lf.Imports)

	var found bool
	for i := 0; i < len(tds); i++ {
	found = false
	for ii := 0; ii < len(ds); ii++ {
	if ds[ii].Name == tds[i].Name {
	found = true
	if ds[ii].ConstraintsEq(*tds[i]) {
	return &Lockfile{}, fmt.Errorf("Generating lock produced conflicting versions of %s. import (%s), testImport (%s)", tds[i].Name, ds[ii].GetConstraint(), tds[i].GetConstraint())
	}
	break
	}
	}
	if !found {
	lf.DevImports = append(lf.DevImports, LockFromDependency(tds[i]))
	}
	}

	sort.Sort(lf.DevImports)

	return lf, nil
	}

	// LockfileFromMap takes a map of dependencies and generates a lock Lockfile instance.
	// TODO remove
	func LockfileFromMap(ds map[string]Dependency, hash string) Lockfile {
	lf := &Lockfile{
	Hash: hash,
	Updated: time.Now(),
	Imports: make([]*Lock, len(ds)),
	}

	i := 0
	for name, dep := range ds {
	lf.Imports[i] = LockFromDependency(dep)
	lf.Imports[i].Name = name
	i++
	}

	sort.Sort(lf.Imports)

	return lf
	}