c8d/save: Handle digested reference same as ID

vvoland · vvoland · commit 5e13f54f57c1 · 2024-01-29T16:29:05.000+01:00
When saving an image treat `image@sha256:abcdef...` the same as
`abcdef...`, this makes it:

- Not export the digested tag as the image name
- Not try to export all tags from the image repository

Signed-off-by: Paweł Gronowski &lt;pawel.gronowski@docker.com&gt;
diff --git a/daemon/containerd/image_exporter.go b/daemon/containerd/image_exporter.go
@@ -168,6 +168,12 @@ func (i *ImageService) ExportImage(ctx context.Context, names []string, outStrea
 
 		ref, refErr := reference.ParseNormalizedNamed(name)
 
+		if refErr == nil {
+			if _, ok := ref.(reference.Digested); ok {
+				specificDigestResolved = true
+			}
+		}
+
 		if resolveErr != nil || !specificDigestResolved {
 			// Name didn't resolve to anything, or name wasn't explicitly referencing a digest
 			if refErr == nil && reference.IsNameOnly(ref) {
