99 lines
2.9 KiB
Go
99 lines
2.9 KiB
Go
/*
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Copyright 2018 Google LLC
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package buildcontext
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import (
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"io"
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"os"
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"path/filepath"
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"strings"
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"cloud.google.com/go/storage"
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"github.com/GoogleContainerTools/kaniko/pkg/constants"
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"github.com/GoogleContainerTools/kaniko/pkg/util"
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"github.com/sirupsen/logrus"
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"golang.org/x/net/context"
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)
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// GCS struct for Google Cloud Storage processing
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type GCS struct {
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context string
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}
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func (g *GCS) UnpackTarFromBuildContext() (string, error) {
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bucket, item := util.GetBucketAndItem(g.context)
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return constants.BuildContextDir, unpackTarFromGCSBucket(bucket, item, constants.BuildContextDir)
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}
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func UploadToBucket(r io.Reader, dest string) error {
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ctx := context.Background()
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context := strings.SplitAfter(dest, "://")[1]
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bucketName, item := util.GetBucketAndItem(context)
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client, err := storage.NewClient(ctx)
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if err != nil {
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return err
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}
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bucket := client.Bucket(bucketName)
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w := bucket.Object(item).NewWriter(ctx)
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if _, err := io.Copy(w, r); err != nil {
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return err
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}
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if err := w.Close(); err != nil {
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return err
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}
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return nil
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}
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// unpackTarFromGCSBucket unpacks the context.tar.gz file in the given bucket to the given directory
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func unpackTarFromGCSBucket(bucketName, item, directory string) error {
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// Get the tar from the bucket
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tarPath, err := getTarFromBucket(bucketName, item, directory)
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if err != nil {
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return err
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}
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logrus.Debug("Unpacking source context tar...")
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if err := util.UnpackCompressedTar(tarPath, directory); err != nil {
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return err
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}
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// Remove the tar so it doesn't interfere with subsequent commands
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logrus.Debugf("Deleting %s", tarPath)
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return os.Remove(tarPath)
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}
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// getTarFromBucket gets context.tar.gz from the GCS bucket and saves it to the filesystem
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// It returns the path to the tar file
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func getTarFromBucket(bucketName, item, directory string) (string, error) {
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ctx := context.Background()
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client, err := storage.NewClient(ctx)
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if err != nil {
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return "", err
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}
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bucket := client.Bucket(bucketName)
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// Get the tarfile context.tar.gz from the GCS bucket, and save it to a tar object
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reader, err := bucket.Object(item).NewReader(ctx)
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if err != nil {
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return "", err
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}
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defer reader.Close()
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tarPath := filepath.Join(directory, constants.ContextTar)
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if err := util.CreateFile(tarPath, reader, 0600, 0, 0); err != nil {
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return "", err
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}
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logrus.Debugf("Copied tarball %s from GCS bucket %s to %s", constants.ContextTar, bucketName, tarPath)
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return tarPath, nil
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}
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