/
tarbz2.go
65 lines (52 loc) · 1.57 KB
/
tarbz2.go
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package archiver
import (
"archive/tar"
"fmt"
"os"
"strings"
"github.com/dsnet/compress/bzip2"
)
// TarBz2 is for TarBz2 format
var TarBz2 tarBz2Format
func init() {
RegisterFormat("TarBz2", TarBz2)
}
type tarBz2Format struct{}
func (tarBz2Format) Match(filename string) bool {
// TODO: read file header to identify the format
return strings.HasSuffix(strings.ToLower(filename), ".tar.bz2")
}
// Make creates a .tar.bz2 file at tarbz2Path containing
// the contents of files listed in filePaths. File paths
// can be those of regular files or directories. Regular
// files are stored at the 'root' of the archive, and
// directories are recursively added.
func (tarBz2Format) Make(tarbz2Path string, filePaths []string) error {
out, err := os.Create(tarbz2Path)
if err != nil {
return fmt.Errorf("error creating %s: %v", tarbz2Path, err)
}
defer out.Close()
bz2Writer, err := bzip2.NewWriter(out, nil)
if err != nil {
return fmt.Errorf("error compressing %s: %v", tarbz2Path, err)
}
defer bz2Writer.Close()
tarWriter := tar.NewWriter(bz2Writer)
defer tarWriter.Close()
return tarball(filePaths, tarWriter, tarbz2Path)
}
// Open untars source and decompresses the contents into destination.
func (tarBz2Format) Open(source, destination string) error {
f, err := os.Open(source)
if err != nil {
return fmt.Errorf("%s: failed to open archive: %v", source, err)
}
defer f.Close()
bz2r, err := bzip2.NewReader(f, nil)
if err != nil {
return fmt.Errorf("error decompressing %s: %v", source, err)
}
defer bz2r.Close()
return untar(tar.NewReader(bz2r), destination)
}