70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
// Copyright 2015 The Prometheus Authors
|
|
// 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
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-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 OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package main
|
|
|
|
import (
|
|
"archive/tar"
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/klauspost/compress/gzip"
|
|
)
|
|
|
|
const filePerm = 0o666
|
|
|
|
type tarGzFileWriter struct {
|
|
tarWriter *tar.Writer
|
|
gzWriter *gzip.Writer
|
|
file *os.File
|
|
}
|
|
|
|
func newTarGzFileWriter(archiveName string) (*tarGzFileWriter, error) {
|
|
file, err := os.Create(archiveName)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error creating archive %q: %w", archiveName, err)
|
|
}
|
|
gzw := gzip.NewWriter(file)
|
|
tw := tar.NewWriter(gzw)
|
|
return &tarGzFileWriter{
|
|
tarWriter: tw,
|
|
gzWriter: gzw,
|
|
file: file,
|
|
}, nil
|
|
}
|
|
|
|
func (w *tarGzFileWriter) close() error {
|
|
if err := w.tarWriter.Close(); err != nil {
|
|
return err
|
|
}
|
|
if err := w.gzWriter.Close(); err != nil {
|
|
return err
|
|
}
|
|
return w.file.Close()
|
|
}
|
|
|
|
func (w *tarGzFileWriter) write(filename string, b []byte) error {
|
|
header := &tar.Header{
|
|
Name: filename,
|
|
Mode: filePerm,
|
|
Size: int64(len(b)),
|
|
}
|
|
if err := w.tarWriter.WriteHeader(header); err != nil {
|
|
return err
|
|
}
|
|
if _, err := w.tarWriter.Write(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|