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114 lines
2.5 KiB
114 lines
2.5 KiB
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 chart
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import (
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"archive/tar"
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"compress/gzip"
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"fmt"
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"io"
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"os"
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"path/filepath"
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)
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// Save creates an archived chart to the given directory.
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//
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// This takes an existing chart and a destination directory.
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//
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// If the directory is /foo, and the chart is named bar, with version 1.0.0, this
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// will generate /foo/bar-1.0.0.tgz.
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//
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// This returns the absolute path to the chart archive file.
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func Save(c *Chart, outDir string) (string, error) {
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// Create archive
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if fi, err := os.Stat(outDir); err != nil {
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return "", err
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} else if !fi.IsDir() {
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return "", fmt.Errorf("location %s is not a directory", outDir)
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}
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cfile := c.Chartfile()
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dir := c.Dir()
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pdir := filepath.Dir(dir)
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filename := fmt.Sprintf("%s-%s.tgz", fname(cfile.Name), cfile.Version)
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filename = filepath.Join(outDir, filename)
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// Fail early if the YAML is borked.
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if err := cfile.Save(filepath.Join(dir, ChartfileName)); err != nil {
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return "", err
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}
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// Create file.
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f, err := os.Create(filename)
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if err != nil {
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return "", err
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}
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// Wrap in gzip writer
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zipper := gzip.NewWriter(f)
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zipper.Header.Extra = headerBytes
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zipper.Header.Comment = "Helm"
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// Wrap in tar writer
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twriter := tar.NewWriter(zipper)
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rollback := false
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defer func() {
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twriter.Close()
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zipper.Close()
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f.Close()
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if rollback {
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os.Remove(filename)
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}
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}()
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err = filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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hdr, err := tar.FileInfoHeader(fi, ".")
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if err != nil {
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return err
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}
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relpath, err := filepath.Rel(pdir, path)
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if err != nil {
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return err
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}
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hdr.Name = relpath
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twriter.WriteHeader(hdr)
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// Skip directories.
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if fi.IsDir() {
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return nil
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}
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in, err := os.Open(path)
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if err != nil {
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return err
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}
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_, err = io.Copy(twriter, in)
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in.Close()
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return err
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})
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if err != nil {
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rollback = true
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return filename, err
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}
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return filename, nil
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}
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