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moby--moby/daemon/image.go
Tõnis Tiigi 690882c2e7 Implement build cache based on history array
Based on work by KJ Tsanaktsidis

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Signed-off-by: KJ Tsanaktsidis <kjtsanaktsidis@gmail.com>
2016-09-23 11:30:06 -07:00

71 lines
1.8 KiB
Go

package daemon
import (
"fmt"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/reference"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
RefOrID string
}
func (e ErrImageDoesNotExist) Error() string {
return fmt.Sprintf("no such id: %s", e.RefOrID)
}
// GetImageID returns an image ID corresponding to the image referred to by
// refOrID.
func (daemon *Daemon) GetImageID(refOrID string) (image.ID, error) {
id, ref, err := reference.ParseIDOrReference(refOrID)
if err != nil {
return "", err
}
if id != "" {
if _, err := daemon.imageStore.Get(image.IDFromDigest(id)); err != nil {
return "", ErrImageDoesNotExist{refOrID}
}
return image.IDFromDigest(id), nil
}
if id, err := daemon.referenceStore.Get(ref); err == nil {
return image.IDFromDigest(id), nil
}
if tagged, ok := ref.(reference.NamedTagged); ok {
if id, err := daemon.imageStore.Search(tagged.Tag()); err == nil {
for _, namedRef := range daemon.referenceStore.References(id.Digest()) {
if namedRef.Name() == ref.Name() {
return id, nil
}
}
}
}
// Search based on ID
if id, err := daemon.imageStore.Search(refOrID); err == nil {
return id, nil
}
return "", ErrImageDoesNotExist{refOrID}
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (daemon *Daemon) GetImage(refOrID string) (*image.Image, error) {
imgID, err := daemon.GetImageID(refOrID)
if err != nil {
return nil, err
}
return daemon.imageStore.Get(imgID)
}
// GetImageOnBuild looks up a Docker image referenced by `name`.
func (daemon *Daemon) GetImageOnBuild(name string) (builder.Image, error) {
img, err := daemon.GetImage(name)
if err != nil {
return nil, err
}
return img, nil
}