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package daemon
import (
"fmt"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/errdefs"
"github.com/docker/docker/image"
)
// 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() {}
// GetImageIDAndOS returns an image ID and operating system corresponding to the image referred to by
// refOrID.
func (daemon *Daemon) GetImageIDAndOS(refOrID string) (image.ID, string, error) {
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return "", "", errdefs.InvalidParameter(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 operating system, defaulting to host OS.
imageOS := runtime.GOOS
id := image.IDFromDigest(digest)
for os := range daemon.stores {
if img, err := daemon.stores[os].imageStore.Get(id); err == nil {
imageOS = img.OperatingSystem()
break
}
}
return id, imageOS, nil
}
// Search based on ID
for os := range daemon.stores {
if id, err := daemon.stores[os].imageStore.Search(refOrID); err == nil {
return id, os, 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, os, err := daemon.GetImageIDAndOS(refOrID)
if err != nil {
return nil, err
}
return daemon.stores[os].imageStore.Get(imgID)
}
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