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// Copyright 2018 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 main
import (
"context"
"log"
"os"
"github.com/google/go-containerregistry/pkg/authn/k8schain"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/v1/remote"
)
func main() {
if len(os.Args) != 2 {
log.Fatalf("expected usage: <command> <arg>, got: %v", os.Args)
}
kc, err := k8schain.NewInCluster(context.Background(), k8schain.Options{})
if err != nil {
log.Fatalf("k8schain.New() = %v", err)
}
ref, err := name.NewDigest(os.Args[1])
if err != nil {
log.Fatalf("NewDigest() = %v", err)
}
img, err := remote.Image(ref, remote.WithAuthFromKeychain(kc))
if err != nil {
log.Fatalf("remote.Image() = %v", err)
}
digest, err := img.Digest()
if err != nil {
log.Fatalf("Digest() = %v", err)
}
log.Printf("got digest: %v", digest)
}
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