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moby--moby/daemon/image_tag.go
John Howard 0380fbff37 LCOW: API: Add platform to /images/create and /build
Signed-off-by: John Howard <jhoward@microsoft.com>

This PR has the API changes described in https://github.com/moby/moby/issues/34617.
Specifically, it adds an HTTP header "X-Requested-Platform" which is a JSON-encoded
OCI Image-spec `Platform` structure.

In addition, it renames (almost all) uses of a string variable platform (and associated)
methods/functions to os. This makes it much clearer to disambiguate with the swarm
"platform" which is really os/arch. This is a stepping stone to getting the daemon towards
fully multi-platform/arch-aware, and makes it clear when "operating system" is being
referred to rather than "platform" which is misleadingly used - sometimes in the swarm
meaning, but more often as just the operating system.
2017-10-06 11:44:18 -07:00

40 lines
1.1 KiB
Go

package daemon
import (
"github.com/docker/distribution/reference"
"github.com/docker/docker/image"
)
// TagImage creates the tag specified by newTag, pointing to the image named
// imageName (alternatively, imageName can also be an image ID).
func (daemon *Daemon) TagImage(imageName, repository, tag string) error {
imageID, os, err := daemon.GetImageIDAndOS(imageName)
if err != nil {
return err
}
newTag, err := reference.ParseNormalizedNamed(repository)
if err != nil {
return err
}
if tag != "" {
if newTag, err = reference.WithTag(reference.TrimNamed(newTag), tag); err != nil {
return err
}
}
return daemon.TagImageWithReference(imageID, os, newTag)
}
// TagImageWithReference adds the given reference to the image ID provided.
func (daemon *Daemon) TagImageWithReference(imageID image.ID, os string, newTag reference.Named) error {
if err := daemon.referenceStore.AddTag(newTag, imageID.Digest(), true); err != nil {
return err
}
if err := daemon.stores[os].imageStore.SetLastUpdated(imageID); err != nil {
return err
}
daemon.LogImageEvent(imageID.String(), reference.FamiliarString(newTag), "tag")
return nil
}