1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/daemon/image.go
John Howard 7b9a8f460b Move to a single tag-store
Signed-off-by: John Howard <jhoward@microsoft.com>
2017-08-18 17:09:27 -07:00

94 lines
2.7 KiB
Go

package daemon
import (
"fmt"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/stringid"
)
// errImageDoesNotExist is error returned when no image can be found for a reference.
type errImageDoesNotExist struct {
ref reference.Reference
}
func (e errImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
func (e errImageDoesNotExist) NotFound() {}
// GetImageIDAndPlatform returns an image ID and platform corresponding to the image referred to by
// refOrID.
func (daemon *Daemon) GetImageIDAndPlatform(refOrID string) (image.ID, string, error) {
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return "", "", validationError{err}
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return "", "", errImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
for platform := range daemon.stores {
if _, err = daemon.stores[platform].imageStore.Get(id); err == nil {
return id, platform, nil
}
}
return "", "", errImageDoesNotExist{ref}
}
if digest, err := daemon.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the platform, defaulting to host OS.
imagePlatform := runtime.GOOS
id := image.IDFromDigest(digest)
for platform := range daemon.stores {
if img, err := daemon.stores[platform].imageStore.Get(id); err == nil {
imagePlatform = img.Platform()
break
}
}
return id, imagePlatform, nil
}
// deprecated: repo:shortid https://github.com/docker/docker/pull/799
if tagged, ok := namedRef.(reference.Tagged); ok {
if tag := tagged.Tag(); stringid.IsShortID(stringid.TruncateID(tag)) {
for platform := range daemon.stores {
if id, err := daemon.stores[platform].imageStore.Search(tag); err == nil {
for _, storeRef := range daemon.referenceStore.References(id.Digest()) {
if storeRef.Name() == namedRef.Name() {
return id, platform, nil
}
}
}
}
}
}
// Search based on ID
for platform := range daemon.stores {
if id, err := daemon.stores[platform].imageStore.Search(refOrID); err == nil {
return id, platform, nil
}
}
return "", "", errImageDoesNotExist{ref}
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (daemon *Daemon) GetImage(refOrID string) (*image.Image, error) {
imgID, platform, err := daemon.GetImageIDAndPlatform(refOrID)
if err != nil {
return nil, err
}
return daemon.stores[platform].imageStore.Get(imgID)
}