Add `untag` sub-command

Podman now supports untagging images via the `untag` sub-command for the
root and `image` commands. Testing and documentation has been added as
well.

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/pkg/adapter/runtime_remote.go b/pkg/adapter/runtime_remote.go
index fe5cc4fef..9c10b31c0 100644
--- a/pkg/adapter/runtime_remote.go
+++ b/pkg/adapter/runtime_remote.go
@@ -413,6 +413,12 @@ func (ci *ContainerImage) TagImage(tag string) error {
 	return err
 }
 
+// UntagImage removes a single tag from an image
+func (ci *ContainerImage) UntagImage(tag string) error {
+	_, err := iopodman.UntagImage().Call(ci.Runtime.Conn, ci.ID(), tag)
+	return err
+}
+
 // RemoveImage calls varlink to remove an image
 func (r *LocalRuntime) RemoveImage(ctx context.Context, img *ContainerImage, force bool) (*image.ImageDeleteResponse, error) {
 	ir := image.ImageDeleteResponse{}