mirror of
https://github.com/mudler/luet.git
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103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
// Copyright 2019 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 legacy provides methods for interacting with legacy image formats.
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package legacy
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"github.com/google/go-containerregistry/pkg/authn"
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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/remote/transport"
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)
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// CopySchema1 allows `[g]crane cp` to work with old images without adding
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// full support for schema 1 images to this package.
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func CopySchema1(desc *remote.Descriptor, srcRef, dstRef name.Reference, srcAuth, dstAuth authn.Authenticator) error {
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m := schema1{}
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if err := json.NewDecoder(bytes.NewReader(desc.Manifest)).Decode(&m); err != nil {
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return err
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}
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for _, layer := range m.FSLayers {
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src := srcRef.Context().Digest(layer.BlobSum)
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dst := dstRef.Context().Digest(layer.BlobSum)
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blob, err := remote.Layer(src, remote.WithAuth(srcAuth))
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if err != nil {
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return err
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}
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if err := remote.WriteLayer(dst.Context(), blob, remote.WithAuth(dstAuth)); err != nil {
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return err
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}
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}
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return putManifest(desc, dstRef, dstAuth)
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}
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// TODO: perhaps expose this in remote?
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func putManifest(desc *remote.Descriptor, dstRef name.Reference, dstAuth authn.Authenticator) error {
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reg := dstRef.Context().Registry
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scopes := []string{dstRef.Scope(transport.PushScope)}
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// TODO(jonjohnsonjr): Use NewWithContext.
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tr, err := transport.New(reg, dstAuth, http.DefaultTransport, scopes)
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if err != nil {
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return err
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}
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client := &http.Client{Transport: tr}
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u := url.URL{
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Scheme: dstRef.Context().Registry.Scheme(),
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Host: dstRef.Context().RegistryStr(),
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Path: fmt.Sprintf("/v2/%s/manifests/%s", dstRef.Context().RepositoryStr(), dstRef.Identifier()),
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}
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req, err := http.NewRequest(http.MethodPut, u.String(), bytes.NewBuffer(desc.Manifest))
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if err != nil {
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return err
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}
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req.Header.Set("Content-Type", string(desc.MediaType))
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resp, err := client.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if err := transport.CheckError(resp, http.StatusOK, http.StatusCreated, http.StatusAccepted); err != nil {
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return err
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}
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// The image was successfully pushed!
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logs.Progress.Printf("%v: digest: %v size: %d", dstRef, desc.Digest, len(desc.Manifest))
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return nil
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}
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type fslayer struct {
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BlobSum string `json:"blobSum"`
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}
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type schema1 struct {
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FSLayers []fslayer `json:"fsLayers"`
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}
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