// Delete deletes a repository or a specific tag. If ref is empty, the entire
// repository named repoName will be deleted; otherwise only the tag named by
// ref will be deleted.
func (store *TagStore) Delete(repoName, ref string) (bool, error) {
store.Lock()
defer store.Unlock()
deleted := false
if err := store.reload(); err != nil {
return false, err
}
repoName = registry.NormalizeLocalName(repoName)
if ref == "" {
// Delete the whole repository.
delete(store.Repositories, repoName)
return true, store.save()
}
repoRefs, exists := store.Repositories[repoName]
if !exists {
return false, fmt.Errorf("No such repository: %s", repoName)
}
if _, exists := repoRefs[ref]; exists {
delete(repoRefs, ref)
if len(repoRefs) == 0 {
delete(store.Repositories, repoName)
}
deleted = true
}
return deleted, store.save()
}
// SetDigest creates a digest reference to an image ID.
func (store *TagStore) SetDigest(repoName, digest, imageName string) error {
img, err := store.LookupImage(imageName)
if err != nil {
return err
}
if err := validateRepoName(repoName); err != nil {
return err
}
if err := validateDigest(digest); err != nil {
return err
}
store.Lock()
defer store.Unlock()
if err := store.reload(); err != nil {
return err
}
repoName = registry.NormalizeLocalName(repoName)
repoRefs, exists := store.Repositories[repoName]
if !exists {
repoRefs = Repository{}
store.Repositories[repoName] = repoRefs
} else if oldID, exists := repoRefs[digest]; exists && oldID != img.ID {
return fmt.Errorf("Conflict: Digest %s is already set to image %s", digest, oldID)
}
repoRefs[digest] = img.ID
return store.save()
}
func (store *TagStore) Set(repoName, tag, imageName string, force bool) error {
img, err := store.LookupImage(imageName)
store.Lock()
defer store.Unlock()
if err != nil {
return err
}
if tag == "" {
tag = DEFAULTTAG
}
if err := validateRepoName(repoName); err != nil {
return err
}
if err := ValidateTagName(tag); err != nil {
return err
}
if err := store.reload(); err != nil {
return err
}
var repo Repository
repoName = registry.NormalizeLocalName(repoName)
if r, exists := store.Repositories[repoName]; exists {
repo = r
if old, exists := store.Repositories[repoName][tag]; exists && !force {
return fmt.Errorf("Conflict: Tag %s is already set to image %s, if you want to replace it, please use -f option", tag, old)
}
} else {
repo = make(map[string]string)
store.Repositories[repoName] = repo
}
repo[tag] = img.ID
return store.save()
}
// Get returns the Repository tag/image map for a given repository.
func (store *TagStore) Get(repoName string) (Repository, error) {
store.Lock()
defer store.Unlock()
if err := store.reload(); err != nil {
return nil, err
}
repoName = registry.NormalizeLocalName(repoName)
if r, exists := store.Repositories[repoName]; exists {
return r, nil
}
return nil, nil
}
// GetID returns ID for image name.
func (store *TagStore) GetID(name string) (string, error) {
repoName, ref := parsers.ParseRepositoryTag(name)
if ref == "" {
ref = tags.DefaultTag
}
store.Lock()
defer store.Unlock()
repoName = registry.NormalizeLocalName(repoName)
repo, ok := store.Repositories[repoName]
if !ok {
return "", ErrNameIsNotExist
}
id, ok := repo[ref]
if !ok {
return "", ErrNameIsNotExist
}
return id, nil
}
// setLoad stores the image to the store.
// If the imageName is already in the repo then a '-f' flag should be used to replace existing image.
func (store *TagStore) setLoad(repoName, tag, imageName string, force bool, out io.Writer) error {
img, err := store.LookupImage(imageName)
store.Lock()
defer store.Unlock()
if err != nil {
return err
}
if tag == "" {
tag = tags.DefaultTag
}
if err := validateRepoName(repoName); err != nil {
return err
}
if err := tags.ValidateTagName(tag); err != nil {
return err
}
if err := store.reload(); err != nil {
return err
}
var repo Repository
repoName = registry.NormalizeLocalName(repoName)
if r, exists := store.Repositories[repoName]; exists {
repo = r
if old, exists := store.Repositories[repoName][tag]; exists {
if !force {
return fmt.Errorf("Conflict: Tag %s:%s is already set to image %s, if you want to replace it, please use -f option", repoName, tag, old[:12])
}
if old != img.ID && out != nil {
fmt.Fprintf(out, "The image %s:%s already exists, renaming the old one with ID %s to empty string\n", repoName, tag, old[:12])
}
}
} else {
repo = make(map[string]string)
store.Repositories[repoName] = repo
}
repo[tag] = img.ID
return store.save()
}
// ImageExport exports list of images to a output stream specified in the
// config. The exported images are archived into a tar when written to the
// output stream. All images with the given tag and all versions containing the
// same tag are exported. names is the set of tags to export, and outStream
// is the writer which the images are written to.
func (s *TagStore) ImageExport(names []string, outStream io.Writer) error {
// get image json
tempdir, err := ioutil.TempDir("", "docker-export-")
if err != nil {
return err
}
defer os.RemoveAll(tempdir)
rootRepoMap := map[string]Repository{}
addKey := func(name string, tag string, id string) {
logrus.Debugf("add key [%s:%s]", name, tag)
if repo, ok := rootRepoMap[name]; !ok {
rootRepoMap[name] = Repository{tag: id}
} else {
repo[tag] = id
}
}
for _, name := range names {
name = registry.NormalizeLocalName(name)
logrus.Debugf("Serializing %s", name)
rootRepo := s.Repositories[name]
if rootRepo != nil {
// this is a base repo name, like 'busybox'
for tag, id := range rootRepo {
addKey(name, tag, id)
if err := s.exportImage(id, tempdir); err != nil {
return err
}
}
} else {
img, err := s.LookupImage(name)
if err != nil {
return err
}
if img != nil {
// This is a named image like 'busybox:latest'
repoName, repoTag := parsers.ParseRepositoryTag(name)
// Skip digests on save
if _, err := digest.ParseDigest(repoTag); err == nil {
repoTag = ""
}
// check this length, because a lookup of a truncated has will not have a tag
// and will not need to be added to this map
if len(repoTag) > 0 {
addKey(repoName, repoTag, img.ID)
}
if err := s.exportImage(img.ID, tempdir); err != nil {
return err
}
} else {
// this must be an ID that didn't get looked up just right?
if err := s.exportImage(name, tempdir); err != nil {
return err
}
}
}
logrus.Debugf("End Serializing %s", name)
}
// write repositories, if there is something to write
if len(rootRepoMap) > 0 {
f, err := os.OpenFile(filepath.Join(tempdir, "repositories"), os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
f.Close()
return err
}
if err := json.NewEncoder(f).Encode(rootRepoMap); err != nil {
return err
}
if err := f.Close(); err != nil {
return err
}
if err := os.Chtimes(filepath.Join(tempdir, "repositories"), time.Unix(0, 0), time.Unix(0, 0)); err != nil {
return err
}
} else {
logrus.Debugf("There were no repositories to write")
}
fs, err := archive.Tar(tempdir, archive.Uncompressed)
if err != nil {
return err
}
defer fs.Close()
if _, err := io.Copy(outStream, fs); err != nil {
return err
}
logrus.Debugf("End export image")
return nil
}
// CmdImageExport exports all images with the given tag. All versions
// containing the same tag are exported. The resulting output is an
// uncompressed tar ball.
// name is the set of tags to export.
// out is the writer where the images are written to.
func (s *TagStore) CmdImageExport(job *engine.Job) error {
if len(job.Args) < 1 {
return fmt.Errorf("Usage: %s IMAGE [IMAGE...]\n", job.Name)
}
// get image json
tempdir, err := ioutil.TempDir("", "docker-export-")
if err != nil {
return err
}
defer os.RemoveAll(tempdir)
rootRepoMap := map[string]Repository{}
addKey := func(name string, tag string, id string) {
log.Debugf("add key [%s:%s]", name, tag)
if repo, ok := rootRepoMap[name]; !ok {
rootRepoMap[name] = Repository{tag: id}
} else {
repo[tag] = id
}
}
for _, name := range job.Args {
name = registry.NormalizeLocalName(name)
log.Debugf("Serializing %s", name)
rootRepo := s.Repositories[name]
if rootRepo != nil {
// this is a base repo name, like 'busybox'
for tag, id := range rootRepo {
addKey(name, tag, id)
if err := s.exportImage(job.Eng, id, tempdir); err != nil {
return err
}
}
} else {
img, err := s.LookupImage(name)
if err != nil {
return err
}
if img != nil {
// This is a named image like 'busybox:latest'
repoName, repoTag := parsers.ParseRepositoryTag(name)
// check this length, because a lookup of a truncated has will not have a tag
// and will not need to be added to this map
if len(repoTag) > 0 {
addKey(repoName, repoTag, img.ID)
}
if err := s.exportImage(job.Eng, img.ID, tempdir); err != nil {
return err
}
} else {
// this must be an ID that didn't get looked up just right?
if err := s.exportImage(job.Eng, name, tempdir); err != nil {
return err
}
}
}
log.Debugf("End Serializing %s", name)
}
// write repositories, if there is something to write
if len(rootRepoMap) > 0 {
rootRepoJson, _ := json.Marshal(rootRepoMap)
if err := ioutil.WriteFile(path.Join(tempdir, "repositories"), rootRepoJson, os.FileMode(0644)); err != nil {
return err
}
} else {
log.Debugf("There were no repositories to write")
}
fs, err := archive.Tar(tempdir, archive.Uncompressed)
if err != nil {
return err
}
defer fs.Close()
if _, err := io.Copy(job.Stdout, fs); err != nil {
return err
}
log.Debugf("End export job: %s", job.Name)
return nil
}