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@@ -9,6 +9,7 @@ import (
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"sort"
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"sync"
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+ "github.com/docker/distribution/reference"
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"github.com/docker/docker/pkg/ioutils"
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"github.com/opencontainers/go-digest"
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)
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@@ -21,18 +22,18 @@ var (
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// An Association is a tuple associating a reference with an image ID.
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type Association struct {
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- Ref Named
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+ Ref reference.Named
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ID digest.Digest
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}
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// Store provides the set of methods which can operate on a tag store.
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type Store interface {
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- References(id digest.Digest) []Named
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- ReferencesByName(ref Named) []Association
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- AddTag(ref Named, id digest.Digest, force bool) error
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- AddDigest(ref Canonical, id digest.Digest, force bool) error
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- Delete(ref Named) (bool, error)
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- Get(ref Named) (digest.Digest, error)
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+ References(id digest.Digest) []reference.Named
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+ ReferencesByName(ref reference.Named) []Association
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+ AddTag(ref reference.Named, id digest.Digest, force bool) error
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+ AddDigest(ref reference.Canonical, id digest.Digest, force bool) error
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+ Delete(ref reference.Named) (bool, error)
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+ Get(ref reference.Named) (digest.Digest, error)
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}
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type store struct {
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@@ -44,24 +45,28 @@ type store struct {
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Repositories map[string]repository
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// referencesByIDCache is a cache of references indexed by ID, to speed
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// up References.
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- referencesByIDCache map[digest.Digest]map[string]Named
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+ referencesByIDCache map[digest.Digest]map[string]reference.Named
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}
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// Repository maps tags to digests. The key is a stringified Reference,
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// including the repository name.
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type repository map[string]digest.Digest
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-type lexicalRefs []Named
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+type lexicalRefs []reference.Named
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-func (a lexicalRefs) Len() int { return len(a) }
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-func (a lexicalRefs) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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-func (a lexicalRefs) Less(i, j int) bool { return a[i].String() < a[j].String() }
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+func (a lexicalRefs) Len() int { return len(a) }
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+func (a lexicalRefs) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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+func (a lexicalRefs) Less(i, j int) bool {
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+ return a[i].String() < a[j].String()
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+}
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type lexicalAssociations []Association
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-func (a lexicalAssociations) Len() int { return len(a) }
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-func (a lexicalAssociations) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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-func (a lexicalAssociations) Less(i, j int) bool { return a[i].Ref.String() < a[j].Ref.String() }
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+func (a lexicalAssociations) Len() int { return len(a) }
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+func (a lexicalAssociations) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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+func (a lexicalAssociations) Less(i, j int) bool {
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+ return a[i].Ref.String() < a[j].Ref.String()
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+}
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// NewReferenceStore creates a new reference store, tied to a file path where
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// the set of references are serialized in JSON format.
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@@ -74,7 +79,7 @@ func NewReferenceStore(jsonPath string) (Store, error) {
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store := &store{
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jsonPath: abspath,
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Repositories: make(map[string]repository),
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- referencesByIDCache: make(map[digest.Digest]map[string]Named),
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+ referencesByIDCache: make(map[digest.Digest]map[string]reference.Named),
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}
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// Load the json file if it exists, otherwise create it.
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if err := store.reload(); os.IsNotExist(err) {
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@@ -89,43 +94,45 @@ func NewReferenceStore(jsonPath string) (Store, error) {
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// AddTag adds a tag reference to the store. If force is set to true, existing
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// references can be overwritten. This only works for tags, not digests.
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-func (store *store) AddTag(ref Named, id digest.Digest, force bool) error {
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- if _, isCanonical := ref.(Canonical); isCanonical {
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+func (store *store) AddTag(ref reference.Named, id digest.Digest, force bool) error {
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+ if _, isCanonical := ref.(reference.Canonical); isCanonical {
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return errors.New("refusing to create a tag with a digest reference")
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}
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- return store.addReference(WithDefaultTag(ref), id, force)
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+ return store.addReference(reference.TagNameOnly(ref), id, force)
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}
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// AddDigest adds a digest reference to the store.
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-func (store *store) AddDigest(ref Canonical, id digest.Digest, force bool) error {
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+func (store *store) AddDigest(ref reference.Canonical, id digest.Digest, force bool) error {
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return store.addReference(ref, id, force)
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}
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-func (store *store) addReference(ref Named, id digest.Digest, force bool) error {
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- if ref.Name() == string(digest.Canonical) {
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+func (store *store) addReference(ref reference.Named, id digest.Digest, force bool) error {
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+ refName := reference.FamiliarName(ref)
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+ refStr := reference.FamiliarString(ref)
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+
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+ if refName == string(digest.Canonical) {
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return errors.New("refusing to create an ambiguous tag using digest algorithm as name")
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}
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store.mu.Lock()
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defer store.mu.Unlock()
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- repository, exists := store.Repositories[ref.Name()]
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+ repository, exists := store.Repositories[refName]
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if !exists || repository == nil {
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repository = make(map[string]digest.Digest)
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- store.Repositories[ref.Name()] = repository
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+ store.Repositories[refName] = repository
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}
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- refStr := ref.String()
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oldID, exists := repository[refStr]
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if exists {
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// force only works for tags
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- if digested, isDigest := ref.(Canonical); isDigest {
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+ if digested, isDigest := ref.(reference.Canonical); isDigest {
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return fmt.Errorf("Cannot overwrite digest %s", digested.Digest().String())
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}
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if !force {
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- return fmt.Errorf("Conflict: Tag %s is already set to image %s, if you want to replace it, please use -f option", ref.String(), oldID.String())
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+ return fmt.Errorf("Conflict: Tag %s is already set to image %s, if you want to replace it, please use -f option", refStr, oldID.String())
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}
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if store.referencesByIDCache[oldID] != nil {
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@@ -138,7 +145,7 @@ func (store *store) addReference(ref Named, id digest.Digest, force bool) error
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repository[refStr] = id
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if store.referencesByIDCache[id] == nil {
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- store.referencesByIDCache[id] = make(map[string]Named)
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+ store.referencesByIDCache[id] = make(map[string]reference.Named)
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}
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store.referencesByIDCache[id][refStr] = ref
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@@ -147,24 +154,24 @@ func (store *store) addReference(ref Named, id digest.Digest, force bool) error
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// Delete deletes a reference from the store. It returns true if a deletion
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// happened, or false otherwise.
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-func (store *store) Delete(ref Named) (bool, error) {
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- ref = WithDefaultTag(ref)
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+func (store *store) Delete(ref reference.Named) (bool, error) {
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+ ref = reference.TagNameOnly(ref)
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+
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+ refName := reference.FamiliarName(ref)
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+ refStr := reference.FamiliarString(ref)
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store.mu.Lock()
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defer store.mu.Unlock()
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- repoName := ref.Name()
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-
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- repository, exists := store.Repositories[repoName]
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+ repository, exists := store.Repositories[refName]
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if !exists {
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return false, ErrDoesNotExist
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}
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- refStr := ref.String()
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if id, exists := repository[refStr]; exists {
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delete(repository, refStr)
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if len(repository) == 0 {
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- delete(store.Repositories, repoName)
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+ delete(store.Repositories, refName)
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}
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if store.referencesByIDCache[id] != nil {
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delete(store.referencesByIDCache[id], refStr)
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@@ -179,18 +186,34 @@ func (store *store) Delete(ref Named) (bool, error) {
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}
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// Get retrieves an item from the store by reference
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-func (store *store) Get(ref Named) (digest.Digest, error) {
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- ref = WithDefaultTag(ref)
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+func (store *store) Get(ref reference.Named) (digest.Digest, error) {
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+ if canonical, ok := ref.(reference.Canonical); ok {
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+ // If reference contains both tag and digest, only
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+ // lookup by digest as it takes precendent over
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+ // tag, until tag/digest combos are stored.
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+ if _, ok := ref.(reference.Tagged); ok {
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+ var err error
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+ ref, err = reference.WithDigest(reference.TrimNamed(canonical), canonical.Digest())
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+ if err != nil {
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+ return "", err
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+ }
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+ }
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+ } else {
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+ ref = reference.TagNameOnly(ref)
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+ }
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+
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+ refName := reference.FamiliarName(ref)
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+ refStr := reference.FamiliarString(ref)
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store.mu.RLock()
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defer store.mu.RUnlock()
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- repository, exists := store.Repositories[ref.Name()]
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+ repository, exists := store.Repositories[refName]
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if !exists || repository == nil {
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return "", ErrDoesNotExist
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}
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- id, exists := repository[ref.String()]
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+ id, exists := repository[refStr]
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if !exists {
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return "", ErrDoesNotExist
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}
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@@ -200,7 +223,7 @@ func (store *store) Get(ref Named) (digest.Digest, error) {
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// References returns a slice of references to the given ID. The slice
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// will be nil if there are no references to this ID.
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-func (store *store) References(id digest.Digest) []Named {
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+func (store *store) References(id digest.Digest) []reference.Named {
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store.mu.RLock()
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defer store.mu.RUnlock()
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@@ -208,7 +231,7 @@ func (store *store) References(id digest.Digest) []Named {
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// 1) We must not return a mutable
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// 2) It would be ugly to expose the extraneous map keys to callers.
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- var references []Named
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+ var references []reference.Named
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for _, ref := range store.referencesByIDCache[id] {
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references = append(references, ref)
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}
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@@ -221,18 +244,20 @@ func (store *store) References(id digest.Digest) []Named {
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// ReferencesByName returns the references for a given repository name.
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// If there are no references known for this repository name,
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// ReferencesByName returns nil.
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-func (store *store) ReferencesByName(ref Named) []Association {
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+func (store *store) ReferencesByName(ref reference.Named) []Association {
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+ refName := reference.FamiliarName(ref)
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+
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store.mu.RLock()
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defer store.mu.RUnlock()
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- repository, exists := store.Repositories[ref.Name()]
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+ repository, exists := store.Repositories[refName]
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if !exists {
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return nil
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}
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var associations []Association
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for refStr, refID := range repository {
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- ref, err := ParseNamed(refStr)
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+ ref, err := reference.ParseNormalizedNamed(refStr)
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if err != nil {
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// Should never happen
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return nil
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@@ -270,13 +295,13 @@ func (store *store) reload() error {
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for _, repository := range store.Repositories {
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for refStr, refID := range repository {
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- ref, err := ParseNamed(refStr)
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+ ref, err := reference.ParseNormalizedNamed(refStr)
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if err != nil {
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// Should never happen
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continue
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}
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if store.referencesByIDCache[refID] == nil {
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- store.referencesByIDCache[refID] = make(map[string]Named)
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+ store.referencesByIDCache[refID] = make(map[string]reference.Named)
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}
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store.referencesByIDCache[refID][refStr] = ref
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}
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