84 lines
1.9 KiB
Go
84 lines
1.9 KiB
Go
/*
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Copyright 2016 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 chartutil
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import (
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"archive/tar"
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"compress/gzip"
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"io"
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"os"
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"path/filepath"
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)
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// Expand uncompresses and extracts a chart into the specified directory.
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func Expand(dir string, r io.Reader) error {
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gr, err := gzip.NewReader(r)
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if err != nil {
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return err
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}
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defer gr.Close()
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tr := tar.NewReader(gr)
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for {
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header, err := tr.Next()
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if err == io.EOF {
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break
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} else if err != nil {
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return err
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}
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//split header name and create missing directories
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d, _ := filepath.Split(header.Name)
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fullDir := filepath.Join(dir, d)
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_, err = os.Stat(fullDir)
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if err != nil && d != "" {
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if err := os.MkdirAll(fullDir, 0700); err != nil {
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return err
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}
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}
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path := filepath.Clean(filepath.Join(dir, header.Name))
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info := header.FileInfo()
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if info.IsDir() {
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if err = os.MkdirAll(path, info.Mode()); err != nil {
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return err
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}
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continue
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}
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file, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, info.Mode())
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if err != nil {
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return err
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}
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defer file.Close()
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_, err = io.Copy(file, tr)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// ExpandFile expands the src file into the dest directroy.
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func ExpandFile(dest, src string) error {
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h, err := os.Open(src)
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if err != nil {
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return err
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}
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defer h.Close()
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return Expand(dest, h)
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}
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