61 lines
915 B
Go
61 lines
915 B
Go
package update
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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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"io/fs"
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"os"
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"path/filepath"
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)
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const tarDirectoryMode fs.FileMode = 0x755
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func UnTar(dst string, r io.Reader) error {
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gzr, err := gzip.NewReader(r)
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if err != nil {
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return err
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}
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defer gzr.Close()
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tr := tar.NewReader(gzr)
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for {
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header, err := tr.Next()
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switch {
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case err == io.EOF:
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return nil
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case err != nil:
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return err
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case header == nil:
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continue
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}
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target := filepath.Join(dst, header.Name)
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switch header.Typeflag {
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case tar.TypeDir:
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if _, err := os.Stat(target); err != nil {
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if err := os.MkdirAll(target, tarDirectoryMode); err != nil {
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return err
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}
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}
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case tar.TypeReg:
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f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
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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(f, tr); err != nil {
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return err
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}
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f.Close()
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}
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}
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}
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