mirror of https://github.com/go-gitea/gitea.git
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package archiver
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"path/filepath"
|
|
|
|
"github.com/ulikunitz/xz"
|
|
fastxz "github.com/xi2/xz"
|
|
)
|
|
|
|
// Xz facilitates XZ compression.
|
|
type Xz struct{}
|
|
|
|
// Compress reads in, compresses it, and writes it to out.
|
|
func (x *Xz) Compress(in io.Reader, out io.Writer) error {
|
|
w, err := xz.NewWriter(out)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer w.Close()
|
|
_, err = io.Copy(w, in)
|
|
return err
|
|
}
|
|
|
|
// Decompress reads in, decompresses it, and writes it to out.
|
|
func (x *Xz) Decompress(in io.Reader, out io.Writer) error {
|
|
r, err := fastxz.NewReader(in, 0)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = io.Copy(out, r)
|
|
return err
|
|
}
|
|
|
|
// CheckExt ensures the file extension matches the format.
|
|
func (x *Xz) CheckExt(filename string) error {
|
|
if filepath.Ext(filename) != ".xz" {
|
|
return fmt.Errorf("filename must have a .xz extension")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (x *Xz) String() string { return "xz" }
|
|
|
|
// NewXz returns a new, default instance ready to be customized and used.
|
|
func NewXz() *Xz {
|
|
return new(Xz)
|
|
}
|
|
|
|
// Compile-time checks to ensure type implements desired interfaces.
|
|
var (
|
|
_ = Compressor(new(Xz))
|
|
_ = Decompressor(new(Xz))
|
|
)
|
|
|
|
// DefaultXz is a default instance that is conveniently ready to use.
|
|
var DefaultXz = NewXz()
|