docker/daemon/image.go

85 строки
2.4 KiB
Go

package daemon
import (
"fmt"
"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))
}
// 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 "", "", 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}
}
for platform := range daemon.stores {
if id, err := daemon.stores[platform].referenceStore.Get(namedRef); err == nil {
return image.IDFromDigest(id), platform, 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.stores[platform].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)
}