mirror of
https://github.com/mudler/luet.git
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53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
// Copyright 2018 Google LLC All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package crane
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import "github.com/google/go-containerregistry/pkg/logs"
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// Digest returns the sha256 hash of the remote image at ref.
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func Digest(ref string, opt ...Option) (string, error) {
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o := makeOptions(opt...)
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if o.platform != nil {
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desc, err := getManifest(ref, opt...)
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if err != nil {
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return "", err
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}
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if !desc.MediaType.IsIndex() {
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return desc.Digest.String(), nil
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}
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// TODO: does not work for indexes which contain schema v1 manifests
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img, err := desc.Image()
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if err != nil {
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return "", err
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}
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digest, err := img.Digest()
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if err != nil {
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return "", err
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}
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return digest.String(), nil
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}
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desc, err := Head(ref, opt...)
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if err != nil {
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logs.Warn.Printf("HEAD request failed, falling back on GET: %v", err)
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rdesc, err := getManifest(ref, opt...)
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if err != nil {
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return "", err
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}
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return rdesc.Digest.String(), nil
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}
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return desc.Digest.String(), nil
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}
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