Update the content interface to return info from update

Namespace keys used by client for uncompressed

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

metadata/adaptors.go

@@ -70,6 +70,25 @@ func adaptContainer(o interface{}) filters.Adaptor {
 	})
 }
 
+func adaptContentInfo(info content.Info) filters.Adaptor {
+	return filters.AdapterFunc(func(fieldpath []string) (string, bool) {
+		if len(fieldpath) == 0 {
+			return "", false
+		}
+
+		switch fieldpath[0] {
+		case "digest":
+			return info.Digest.String(), true
+		case "size":
+			// TODO: support size based filtering
+		case "labels":
+			return checkMap(fieldpath[1:], info.Labels)
+		}
+
+		return "", false
+	})
+}
+
 func adaptContentStatus(status content.Status) filters.Adaptor {
 	return filters.AdapterFunc(func(fieldpath []string) (string, bool) {
 		if len(fieldpath) == 0 {