Update vendor

vendor/github.com/google/go-containerregistry/pkg/internal/legacy/copy.go

@@ -0,0 +1,102 @@
+// Copyright 2019 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 legacy provides methods for interacting with legacy image formats.
+package legacy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"github.com/google/go-containerregistry/pkg/authn"
+	"github.com/google/go-containerregistry/pkg/logs"
+	"github.com/google/go-containerregistry/pkg/name"
+	"github.com/google/go-containerregistry/pkg/v1/remote"
+	"github.com/google/go-containerregistry/pkg/v1/remote/transport"
+)
+
+// CopySchema1 allows `[g]crane cp` to work with old images without adding
+// full support for schema 1 images to this package.
+func CopySchema1(desc *remote.Descriptor, srcRef, dstRef name.Reference, srcAuth, dstAuth authn.Authenticator) error {
+	m := schema1{}
+	if err := json.NewDecoder(bytes.NewReader(desc.Manifest)).Decode(&m); err != nil {
+		return err
+	}
+
+	for _, layer := range m.FSLayers {
+		src := srcRef.Context().Digest(layer.BlobSum)
+		dst := dstRef.Context().Digest(layer.BlobSum)
+
+		blob, err := remote.Layer(src, remote.WithAuth(srcAuth))
+		if err != nil {
+			return err
+		}
+
+		if err := remote.WriteLayer(dst.Context(), blob, remote.WithAuth(dstAuth)); err != nil {
+			return err
+		}
+	}
+
+	return putManifest(desc, dstRef, dstAuth)
+}
+
+// TODO: perhaps expose this in remote?
+func putManifest(desc *remote.Descriptor, dstRef name.Reference, dstAuth authn.Authenticator) error {
+	reg := dstRef.Context().Registry
+	scopes := []string{dstRef.Scope(transport.PushScope)}
+
+	// TODO(jonjohnsonjr): Use NewWithContext.
+	tr, err := transport.New(reg, dstAuth, http.DefaultTransport, scopes)
+	if err != nil {
+		return err
+	}
+	client := &http.Client{Transport: tr}
+
+	u := url.URL{
+		Scheme: dstRef.Context().Registry.Scheme(),
+		Host:   dstRef.Context().RegistryStr(),
+		Path:   fmt.Sprintf("/v2/%s/manifests/%s", dstRef.Context().RepositoryStr(), dstRef.Identifier()),
+	}
+
+	req, err := http.NewRequest(http.MethodPut, u.String(), bytes.NewBuffer(desc.Manifest))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", string(desc.MediaType))
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if err := transport.CheckError(resp, http.StatusOK, http.StatusCreated, http.StatusAccepted); err != nil {
+		return err
+	}
+
+	// The image was successfully pushed!
+	logs.Progress.Printf("%v: digest: %v size: %d", dstRef, desc.Digest, len(desc.Manifest))
+	return nil
+}
+
+type fslayer struct {
+	BlobSum string `json:"blobSum"`
+}
+
+type schema1 struct {
+	FSLayers []fslayer `json:"fsLayers"`
+}