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decompress.go
57 lines (51 loc) · 1.37 KB
/
decompress.go
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// Copyright 2020 spaGO Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package app
import (
"archive/tar"
"compress/gzip"
"io"
"log"
"os"
"path/filepath"
)
// ====
// What follows is a copy-and-paste from https://stackoverflow.com/questions/57639648/how-to-decompress-tar-gz-file-in-go
// ====
func extractTarGz(gzipStream io.Reader, path string) {
uncompressedStream, err := gzip.NewReader(gzipStream)
if err != nil {
log.Fatal("ExtractTarGz: NewReader failed")
}
tarReader := tar.NewReader(uncompressedStream)
for true {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("ExtractTarGz: Next() failed: %s", err.Error())
}
switch header.Typeflag {
case tar.TypeDir:
if err := os.Mkdir(filepath.Join(path, header.Name), 0755); err != nil {
log.Fatalf("ExtractTarGz: Mkdir() failed: %s", err.Error())
}
case tar.TypeReg:
outFile, err := os.Create(filepath.Join(path, header.Name))
if err != nil {
log.Fatalf("ExtractTarGz: Create() failed: %s", err.Error())
}
if _, err := io.Copy(outFile, tarReader); err != nil {
log.Fatalf("ExtractTarGz: Copy() failed: %s", err.Error())
}
outFile.Close()
default:
log.Fatalf(
"ExtractTarGz: uknown type: %d in %s",
header.Typeflag,
header.Name)
}
}
}