mirror of
https://github.com/matrix-org/dendrite
synced 2024-11-13 21:31:08 +01:00
63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
package main
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import (
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"archive/tar"
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"compress/gzip"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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// From https://gist.github.com/mimoo/25fc9716e0f1353791f5908f94d6e726
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// Modified to strip off top-level when compressing
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func compress(src string, buf io.Writer) error {
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// tar > gzip > buf
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zr := gzip.NewWriter(buf)
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tw := tar.NewWriter(zr)
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// walk through every file in the folder
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err := filepath.Walk(src, func(file string, fi os.FileInfo, e error) error {
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// generate tar header
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header, err := tar.FileInfoHeader(fi, file)
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if err != nil {
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return err
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}
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// must provide real name
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// (see https://golang.org/src/archive/tar/common.go?#L626)
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header.Name = strings.TrimPrefix(filepath.ToSlash(file), src+"/")
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// write header
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if err := tw.WriteHeader(header); err != nil {
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return err
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}
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// if not a dir, write file content
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if !fi.IsDir() {
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data, err := os.Open(file)
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if err != nil {
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return err
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}
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if _, err = io.Copy(tw, data); err != nil {
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return err
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}
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if err = data.Close(); err != nil {
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return err
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}
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}
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return nil
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})
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if err != nil {
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return err
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}
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// produce tar
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if err := tw.Close(); err != nil {
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return err
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}
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// produce gzip
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if err := zr.Close(); err != nil {
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return err
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}
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//
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return nil
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}
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