Upgrade k8s.io/client-go to version 2

vendor/k8s.io/client-go/pkg/util/parsers/parsers.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+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 parsers
+
+import (
+	"fmt"
+
+	dockerref "github.com/docker/distribution/reference"
+)
+
+const (
+	DefaultImageTag = "latest"
+)
+
+// ParseImageName parses a docker image string into three parts: repo, tag and digest.
+// If both tag and digest are empty, a default image tag will be returned.
+func ParseImageName(image string) (string, string, string, error) {
+	named, err := dockerref.ParseNamed(image)
+	if err != nil {
+		return "", "", "", fmt.Errorf("couldn't parse image name: %v", err)
+	}
+
+	repoToPull := named.Name()
+	var tag, digest string
+
+	tagged, ok := named.(dockerref.Tagged)
+	if ok {
+		tag = tagged.Tag()
+	}
+
+	digested, ok := named.(dockerref.Digested)
+	if ok {
+		digest = digested.Digest().String()
+	}
+	// If no tag was specified, use the default "latest".
+	if len(tag) == 0 && len(digest) == 0 {
+		tag = DefaultImageTag
+	}
+	return repoToPull, tag, digest, nil
+}