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89 lines
2.8 KiB
89 lines
2.8 KiB
1 year ago
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// 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 (
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"fmt"
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"github.com/google/go-containerregistry/internal/legacy"
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"github.com/google/go-containerregistry/pkg/logs"
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"github.com/google/go-containerregistry/pkg/name"
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"github.com/google/go-containerregistry/pkg/v1/remote"
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"github.com/google/go-containerregistry/pkg/v1/types"
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)
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// Copy copies a remote image or index from src to dst.
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func Copy(src, dst string, opt ...Option) error {
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o := makeOptions(opt...)
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srcRef, err := name.ParseReference(src, o.Name...)
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if err != nil {
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return fmt.Errorf("parsing reference %q: %w", src, err)
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}
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dstRef, err := name.ParseReference(dst, o.Name...)
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if err != nil {
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return fmt.Errorf("parsing reference for %q: %w", dst, err)
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}
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logs.Progress.Printf("Copying from %v to %v", srcRef, dstRef)
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desc, err := remote.Get(srcRef, o.Remote...)
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if err != nil {
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return fmt.Errorf("fetching %q: %w", src, err)
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}
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switch desc.MediaType {
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case types.OCIImageIndex, types.DockerManifestList:
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// Handle indexes separately.
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if o.Platform != nil {
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// If platform is explicitly set, don't copy the whole index, just the appropriate image.
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if err := copyImage(desc, dstRef, o); err != nil {
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return fmt.Errorf("failed to copy image: %w", err)
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}
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} else {
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if err := copyIndex(desc, dstRef, o); err != nil {
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return fmt.Errorf("failed to copy index: %w", err)
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}
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}
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case types.DockerManifestSchema1, types.DockerManifestSchema1Signed:
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// Handle schema 1 images separately.
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if err := legacy.CopySchema1(desc, srcRef, dstRef, o.Remote...); err != nil {
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return fmt.Errorf("failed to copy schema 1 image: %w", err)
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}
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default:
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// Assume anything else is an image, since some registries don't set mediaTypes properly.
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if err := copyImage(desc, dstRef, o); err != nil {
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return fmt.Errorf("failed to copy image: %w", err)
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}
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}
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return nil
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}
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func copyImage(desc *remote.Descriptor, dstRef name.Reference, o Options) error {
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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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return remote.Write(dstRef, img, o.Remote...)
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}
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func copyIndex(desc *remote.Descriptor, dstRef name.Reference, o Options) error {
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idx, err := desc.ImageIndex()
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if err != nil {
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return err
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}
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return remote.WriteIndex(dstRef, idx, o.Remote...)
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}
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