mirror of
https://github.com/moby/moby.git
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Removed deprecated docker/image package
This commit is contained in:
Solomon Hykes
parent
b5b2f005eb
commit
dd0227b700
1 changed files with 0 additions and 342 deletions
342
image/image.go
342
image/image.go
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@ -1,342 +0,0 @@
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package image
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import (
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"encoding/json"
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"errors"
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"github.com/dotcloud/docker/future"
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"io"
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"sort"
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"strings"
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"time"
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)
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type Store struct {
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*Index
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Root string
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Layers *LayerStore
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}
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func New(root string) (*Store, error) {
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abspath, err := filepath.Abs(root)
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if err != nil {
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return nil, err
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}
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if err := os.MkdirAll(abspath, 0700); err != nil && !os.IsExist(err) {
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return nil, err
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}
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layers, err := NewLayerStore(path.Join(root, "layers"))
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if err != nil {
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return nil, err
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}
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if err := layers.Init(); err != nil {
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return nil, err
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}
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return &Store{
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Root: abspath,
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Index: NewIndex(path.Join(root, "index.json")),
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Layers: layers,
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}, nil
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}
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type Compression uint32
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const (
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Uncompressed Compression = iota
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Bzip2
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Gzip
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)
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func (store *Store) Import(name string, archive io.Reader, stderr io.Writer, parent *Image, compression Compression) (*Image, error) {
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layer, err := store.Layers.AddLayer(archive, stderr, compression)
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if err != nil {
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return nil, err
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}
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layers := []string{layer}
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if parent != nil {
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layers = append(layers, parent.Layers...)
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}
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var parentId string
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if parent != nil {
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parentId = parent.Id
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}
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return store.Create(name, parentId, layers...)
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}
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func (store *Store) Create(name string, source string, layers ...string) (*Image, error) {
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image, err := NewImage(name, layers, source)
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if err != nil {
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return nil, err
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}
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if err := store.Index.Add(name, image); err != nil {
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return nil, err
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}
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return image, nil
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}
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// Index
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type Index struct {
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Path string
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ByName map[string]*History
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ById map[string]*Image
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}
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func NewIndex(path string) *Index {
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return &Index{
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Path: path,
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ByName: make(map[string]*History),
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ById: make(map[string]*Image),
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}
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}
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func (index *Index) Exists(id string) bool {
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_, exists := index.ById[id]
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return exists
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}
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func (index *Index) Find(idOrName string) *Image {
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// Load
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if err := index.load(); err != nil {
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return nil
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}
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// Lookup by ID
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if image, exists := index.ById[idOrName]; exists {
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return image
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}
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// Lookup by name
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if history, exists := index.ByName[idOrName]; exists && history.Len() > 0 {
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return (*history)[0]
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}
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return nil
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}
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func (index *Index) Add(name string, image *Image) error {
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// Load
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if err := index.load(); err != nil {
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return err
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}
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if _, exists := index.ByName[name]; !exists {
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index.ByName[name] = new(History)
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} else {
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// If this image is already the latest version, don't add it.
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if (*index.ByName[name])[0].Id == image.Id {
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return nil
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}
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}
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index.ByName[name].Add(image)
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index.ById[image.Id] = image
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// Save
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if err := index.save(); err != nil {
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return err
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}
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return nil
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}
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func (index *Index) Copy(srcNameOrId, dstName string) (*Image, error) {
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if srcNameOrId == "" || dstName == "" {
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return nil, errors.New("Illegal image name")
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}
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// Load
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if err := index.load(); err != nil {
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return nil, err
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}
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src := index.Find(srcNameOrId)
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if src == nil {
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return nil, errors.New("No such image: " + srcNameOrId)
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}
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dst, err := NewImage(dstName, src.Layers, src.Id)
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if err != nil {
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return nil, err
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}
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if err := index.Add(dstName, dst); err != nil {
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return nil, err
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}
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// Save
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if err := index.save(); err != nil {
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return nil, err
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}
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return dst, nil
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}
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func (index *Index) Rename(oldName, newName string) error {
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// Load
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if err := index.load(); err != nil {
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return err
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}
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if _, exists := index.ByName[oldName]; !exists {
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return errors.New("Can't rename " + oldName + ": no such image.")
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}
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if _, exists := index.ByName[newName]; exists {
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return errors.New("Can't rename to " + newName + ": name is already in use.")
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}
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index.ByName[newName] = index.ByName[oldName]
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delete(index.ByName, oldName)
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// Change the ID of all images, since they include the name
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for _, image := range *index.ByName[newName] {
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if id, err := generateImageId(newName, image.Layers); err != nil {
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return err
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} else {
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oldId := image.Id
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image.Id = id
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index.ById[id] = image
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delete(index.ById, oldId)
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}
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}
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// Save
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if err := index.save(); err != nil {
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return err
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}
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return nil
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}
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// Delete deletes all images with the name `name`
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func (index *Index) Delete(name string) error {
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// Load
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if err := index.load(); err != nil {
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return err
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}
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if _, exists := index.ByName[name]; !exists {
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return errors.New("No such image: " + name)
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}
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// Remove from index lookup
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for _, image := range *index.ByName[name] {
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delete(index.ById, image.Id)
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}
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// Remove from name lookup
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delete(index.ByName, name)
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// Save
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if err := index.save(); err != nil {
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return err
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}
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return nil
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}
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func (index *Index) Names() []string {
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if err := index.load(); err != nil {
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return []string{}
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}
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var names []string
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for name := range index.ByName {
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names = append(names, name)
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}
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sort.Strings(names)
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return names
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}
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func (index *Index) load() error {
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jsonData, err := ioutil.ReadFile(index.Path)
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return err
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}
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path := index.Path
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if err := json.Unmarshal(jsonData, index); err != nil {
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return err
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}
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index.Path = path
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return nil
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}
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func (index *Index) save() error {
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jsonData, err := json.Marshal(index)
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if err != nil {
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return err
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}
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if err := ioutil.WriteFile(index.Path, jsonData, 0600); err != nil {
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return err
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}
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return nil
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}
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// History wraps an array of images so they can be sorted by date (most recent first)
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type History []*Image
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func (history *History) Len() int {
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return len(*history)
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}
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func (history *History) Less(i, j int) bool {
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images := *history
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return images[j].Created.Before(images[i].Created)
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}
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func (history *History) Swap(i, j int) {
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images := *history
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tmp := images[i]
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images[i] = images[j]
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images[j] = tmp
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}
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func (history *History) Add(image *Image) {
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*history = append(*history, image)
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sort.Sort(history)
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}
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func (history *History) Del(id string) {
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for idx, image := range *history {
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if image.Id == id {
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*history = append((*history)[:idx], (*history)[idx+1:]...)
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}
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}
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}
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type Image struct {
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Id string // Globally unique identifier
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Layers []string // Absolute paths
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Created time.Time
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Parent string
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}
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func (image *Image) IdParts() (string, string) {
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if len(image.Id) < 8 {
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return "", image.Id
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}
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hash := image.Id[len(image.Id)-8 : len(image.Id)]
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name := image.Id[:len(image.Id)-9]
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return name, hash
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}
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func (image *Image) IdIsFinal() bool {
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return len(image.Layers) == 1
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}
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func generateImageId(name string, layers []string) (string, error) {
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if len(layers) == 0 {
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return "", errors.New("No layers provided.")
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}
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var hash string
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if len(layers) == 1 {
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hash = path.Base(layers[0])
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} else {
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var ids string
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for _, layer := range layers {
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ids += path.Base(layer)
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}
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if h, err := future.ComputeId(strings.NewReader(ids)); err != nil {
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return "", err
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} else {
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hash = h
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}
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}
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return name + ":" + hash, nil
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}
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func NewImage(name string, layers []string, parent string) (*Image, error) {
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id, err := generateImageId(name, layers)
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if err != nil {
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return nil, err
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}
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return &Image{
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Id: id,
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Layers: layers,
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Created: time.Now(),
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Parent: parent,
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}, nil
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}
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