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decompress.go
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/
decompress.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2021 Tencent. 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package compress
import (
"archive/tar"
"compress/gzip"
"fmt"
"io"
"os"
"strings"
)
// ExtractTarGz decompress .tgz file
func ExtractTarGz(src, dest string) error {
gzipStream, err := os.Open(src)
if err != nil {
return fmt.Errorf("ExtractTarGz: Open file: %s failed", src)
}
uncompressedStream, err := gzip.NewReader(gzipStream)
if err != nil {
return fmt.Errorf("ExtractTarGz: NewReader failed")
}
tarReader := tar.NewReader(uncompressedStream)
for {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
return fmt.Errorf("ExtractTarGz: Next() failed: %s", err.Error())
}
file := strings.TrimRight(dest, "/") + "/" + header.Name
switch header.Typeflag {
case tar.TypeDir:
if err := os.Mkdir(file, 0755); err != nil {
return fmt.Errorf("ExtractTarGz: Mkdir() failed: %s", err.Error())
}
case tar.TypeReg:
outFile, err := os.Create(file)
if err != nil {
return fmt.Errorf("ExtractTarGz: Create() failed: %s", err.Error())
}
if _, err := io.Copy(outFile, tarReader); err != nil {
return fmt.Errorf("ExtractTarGz: Copy() failed: %s", err.Error())
}
outFile.Close()
default:
return fmt.Errorf(
"ExtractTarGz: uknown type: %s in %s",
string(header.Typeflag),
header.Name)
}
}
return nil
}