mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-04 14:46:57 -05:00
30ce3731a1
* denisenkom/go-mssqldb untagged -> v0.9.0 * github.com/editorconfig/editorconfig-core-go v2.3.7 -> v2.3.8 * github.com/go-testfixtures/testfixtures v3.4.0 -> v3.4.1 * github.com/mholt/archiver v3.3.2 -> v3.5.0 * github.com/olivere/elastic v7.0.20 -> v7.0.21 * github.com/urfave/cli v1.22.4 -> v1.22.5 * github.com/xanzy/go-gitlab v0.38.1 -> v0.39.0 * github.com/yuin/goldmark-meta untagged -> v1.0.0 * github.com/ethantkoenig/rupture 0a76f03a811a -> c3b3b810dc77 * github.com/jaytaylor/html2text 8fb95d837f7d -> 3577fbdbcff7 * github.com/kballard/go-shellquote cd60e84ee657 -> 95032a82bc51 * github.com/msteinert/pam 02ccfbfaf0cc -> 913b8f8cdf8b * github.com/unknwon/paginater 7748a72e0141 -> 042474bd0eae * CI.restart() Co-authored-by: techknowlogick <techknowlogick@gitea.io>
64 lines
1.5 KiB
Go
Vendored
64 lines
1.5 KiB
Go
Vendored
package archiver
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"path/filepath"
|
|
|
|
"github.com/pierrec/lz4/v4"
|
|
)
|
|
|
|
// Lz4 facilitates LZ4 compression.
|
|
type Lz4 struct {
|
|
CompressionLevel int
|
|
}
|
|
|
|
// Compress reads in, compresses it, and writes it to out.
|
|
func (lz *Lz4) Compress(in io.Reader, out io.Writer) error {
|
|
w := lz4.NewWriter(out)
|
|
// TODO archiver v4: use proper lz4.Fast
|
|
// bitshifting for backwards compatibility with lz4/v3
|
|
options := []lz4.Option{
|
|
lz4.CompressionLevelOption(lz4.CompressionLevel(1 << (8 + lz.CompressionLevel))),
|
|
}
|
|
if err := w.Apply(options...); 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 (lz *Lz4) Decompress(in io.Reader, out io.Writer) error {
|
|
r := lz4.NewReader(in)
|
|
_, err := io.Copy(out, r)
|
|
return err
|
|
}
|
|
|
|
// CheckExt ensures the file extension matches the format.
|
|
func (lz *Lz4) CheckExt(filename string) error {
|
|
if filepath.Ext(filename) != ".lz4" {
|
|
return fmt.Errorf("filename must have a .lz4 extension")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (lz *Lz4) String() string { return "lz4" }
|
|
|
|
// NewLz4 returns a new, default instance ready to be customized and used.
|
|
func NewLz4() *Lz4 {
|
|
return &Lz4{
|
|
CompressionLevel: 9, // https://github.com/lz4/lz4/blob/1b819bfd633ae285df2dfe1b0589e1ec064f2873/lib/lz4hc.h#L48
|
|
}
|
|
}
|
|
|
|
// Compile-time checks to ensure type implements desired interfaces.
|
|
var (
|
|
_ = Compressor(new(Lz4))
|
|
_ = Decompressor(new(Lz4))
|
|
)
|
|
|
|
// DefaultLz4 is a default instance that is conveniently ready to use.
|
|
var DefaultLz4 = NewLz4()
|