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69 lines
1.6 KiB
69 lines
1.6 KiB
// Copyright 2015 The Prometheus Authors |
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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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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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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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package main |
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import ( |
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"archive/tar" |
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"compress/gzip" |
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"os" |
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"github.com/pkg/errors" |
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) |
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const filePerm = 0644 |
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type tarGzFileWriter struct { |
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tarWriter *tar.Writer |
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gzWriter *gzip.Writer |
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file *os.File |
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} |
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func newTarGzFileWriter(archiveName string) (*tarGzFileWriter, error) { |
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file, err := os.Create(archiveName) |
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if err != nil { |
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return nil, errors.Wrapf(err, "error creating archive %q", archiveName) |
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} |
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gzw := gzip.NewWriter(file) |
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tw := tar.NewWriter(gzw) |
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return &tarGzFileWriter{ |
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tarWriter: tw, |
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gzWriter: gzw, |
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file: file, |
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}, nil |
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} |
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func (w *tarGzFileWriter) close() error { |
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if err := w.tarWriter.Close(); err != nil { |
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return err |
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} |
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if err := w.gzWriter.Close(); err != nil { |
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return err |
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} |
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return w.file.Close() |
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} |
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func (w *tarGzFileWriter) write(filename string, b []byte) error { |
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header := &tar.Header{ |
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Name: filename, |
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Mode: filePerm, |
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Size: int64(len(b)), |
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} |
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if err := w.tarWriter.WriteHeader(header); err != nil { |
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return err |
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} |
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if _, err := w.tarWriter.Write(b); err != nil { |
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return err |
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} |
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return nil |
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}
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