github.com/rhatdan/docker@v0.7.7-0.20180119204836-47a0dcbcd20a/daemon/image_tag.go (about) 1 package daemon 2 3 import ( 4 "github.com/docker/distribution/reference" 5 "github.com/docker/docker/image" 6 ) 7 8 // TagImage creates the tag specified by newTag, pointing to the image named 9 // imageName (alternatively, imageName can also be an image ID). 10 func (daemon *Daemon) TagImage(imageName, repository, tag string) error { 11 imageID, _, err := daemon.GetImageIDAndOS(imageName) 12 if err != nil { 13 return err 14 } 15 16 newTag, err := reference.ParseNormalizedNamed(repository) 17 if err != nil { 18 return err 19 } 20 if tag != "" { 21 if newTag, err = reference.WithTag(reference.TrimNamed(newTag), tag); err != nil { 22 return err 23 } 24 } 25 26 return daemon.TagImageWithReference(imageID, newTag) 27 } 28 29 // TagImageWithReference adds the given reference to the image ID provided. 30 func (daemon *Daemon) TagImageWithReference(imageID image.ID, newTag reference.Named) error { 31 if err := daemon.referenceStore.AddTag(newTag, imageID.Digest(), true); err != nil { 32 return err 33 } 34 35 if err := daemon.imageStore.SetLastUpdated(imageID); err != nil { 36 return err 37 } 38 daemon.LogImageEvent(imageID.String(), reference.FamiliarString(newTag), "tag") 39 return nil 40 }