1 files changed, 39 insertions, 0 deletions
diff --git a/pkg/crane/tag.go b/pkg/crane/tag.go
new file mode 100644
index 0000000..13bc395
--- /dev/null
+++ b/pkg/crane/tag.go
@@ -0,0 +1,39 @@
+// Copyright 2019 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crane
+
+import (
+	"fmt"
+
+	"github.com/google/go-containerregistry/pkg/name"
+	"github.com/google/go-containerregistry/pkg/v1/remote"
+)
+
+// Tag adds tag to the remote img.
+func Tag(img, tag string, opt ...Option) error {
+	o := makeOptions(opt...)
+	ref, err := name.ParseReference(img, o.Name...)
+	if err != nil {
+		return fmt.Errorf("parsing reference %q: %w", img, err)
+	}
+	desc, err := remote.Get(ref, o.Remote...)
+	if err != nil {
+		return fmt.Errorf("fetching %q: %w", img, err)
+	}
+
+	dst := ref.Context().Tag(tag)
+
+	return remote.Tag(dst, desc, o.Remote...)
+}