73 lines
2.1 KiB
Go
73 lines
2.1 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
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import (
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"fmt"
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"github.com/docker/distribution/reference"
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"github.com/docker/docker/errdefs"
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"github.com/docker/docker/image"
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)
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// errImageDoesNotExist is error returned when no image can be found for a reference.
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type errImageDoesNotExist struct {
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ref reference.Reference
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}
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func (e errImageDoesNotExist) Error() string {
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ref := e.ref
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if named, ok := ref.(reference.Named); ok {
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ref = reference.TagNameOnly(named)
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}
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return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
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}
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func (e errImageDoesNotExist) NotFound() {}
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// GetImageIDAndOS returns an image ID and operating system corresponding to the image referred to by
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// refOrID.
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func (daemon *Daemon) GetImageIDAndOS(refOrID string) (image.ID, string, error) {
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ref, err := reference.ParseAnyReference(refOrID)
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if err != nil {
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return "", "", errdefs.InvalidParameter(err)
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}
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namedRef, ok := ref.(reference.Named)
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if !ok {
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digested, ok := ref.(reference.Digested)
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if !ok {
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return "", "", errImageDoesNotExist{ref}
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}
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id := image.IDFromDigest(digested.Digest())
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if img, err := daemon.imageStore.Get(id); err == nil {
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return id, img.OperatingSystem(), nil
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}
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return "", "", errImageDoesNotExist{ref}
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}
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if digest, err := daemon.referenceStore.Get(namedRef); err == nil {
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// Search the image stores to get the operating system, defaulting to host OS.
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id := image.IDFromDigest(digest)
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if img, err := daemon.imageStore.Get(id); err == nil {
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return id, img.OperatingSystem(), nil
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}
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}
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// Search based on ID
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if id, err := daemon.imageStore.Search(refOrID); err == nil {
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img, err := daemon.imageStore.Get(id)
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if err != nil {
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return "", "", errImageDoesNotExist{ref}
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}
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return id, img.OperatingSystem(), nil
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}
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return "", "", errImageDoesNotExist{ref}
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}
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// GetImage returns an image corresponding to the image referred to by refOrID.
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func (daemon *Daemon) GetImage(refOrID string) (*image.Image, error) {
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imgID, _, err := daemon.GetImageIDAndOS(refOrID)
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if err != nil {
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return nil, err
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}
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return daemon.imageStore.Get(imgID)
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}
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