mirror of
https://github.com/gravitational/teleport.git
synced 2026-09-21 05:55:42 +08:00
78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package utils
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import (
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"archive/tar"
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"bytes"
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"compress/gzip"
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"io/fs"
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"github.com/gravitational/trace"
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)
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// ReadStatFS combines two interfaces: fs.ReadFileFS and fs.StatFS
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// We need both when creating the archive to be able to:
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// - read file contents - `ReadFile` provided by fs.ReadFileFS
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// - set the correct file permissions - `Stat() ... Mode()` provided by fs.StatFS
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type ReadStatFS interface {
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fs.ReadFileFS
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fs.StatFS
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}
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// CompressTarGzArchive creates a Tar Gzip archive in memory, reading the files using the provided file reader
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func CompressTarGzArchive(files []string, fileReader ReadStatFS) (*bytes.Buffer, error) {
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archiveBytes := &bytes.Buffer{}
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gzipWriter, err := gzip.NewWriterLevel(archiveBytes, gzip.BestSpeed)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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defer gzipWriter.Close()
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tarWriter := tar.NewWriter(gzipWriter)
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defer tarWriter.Close()
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for _, filename := range files {
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bs, err := fileReader.ReadFile(filename)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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fileStat, err := fileReader.Stat(filename)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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if err := tarWriter.WriteHeader(&tar.Header{
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Name: filename,
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Size: int64(len(bs)),
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Mode: int64(fileStat.Mode()),
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}); err != nil {
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return nil, trace.Wrap(err)
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}
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if _, err := tarWriter.Write(bs); err != nil {
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return nil, trace.Wrap(err)
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}
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}
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return archiveBytes, nil
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}
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