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53 lines
1.6 KiB
53 lines
1.6 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 empty
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import (
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"fmt"
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v1 "github.com/google/go-containerregistry/pkg/v1"
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"github.com/google/go-containerregistry/pkg/v1/partial"
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"github.com/google/go-containerregistry/pkg/v1/types"
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)
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// Image is a singleton empty image, think: FROM scratch.
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var Image, _ = partial.UncompressedToImage(emptyImage{})
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type emptyImage struct{}
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// MediaType implements partial.UncompressedImageCore.
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func (i emptyImage) MediaType() (types.MediaType, error) {
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return types.DockerManifestSchema2, nil
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}
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// RawConfigFile implements partial.UncompressedImageCore.
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func (i emptyImage) RawConfigFile() ([]byte, error) {
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return partial.RawConfigFile(i)
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}
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// ConfigFile implements v1.Image.
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func (i emptyImage) ConfigFile() (*v1.ConfigFile, error) {
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return &v1.ConfigFile{
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RootFS: v1.RootFS{
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// Some clients check this.
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Type: "layers",
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},
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}, nil
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}
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func (i emptyImage) LayerByDiffID(h v1.Hash) (partial.UncompressedLayer, error) {
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return nil, fmt.Errorf("LayerByDiffID(%s): empty image", h)
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}
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