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gitea/vendor/github.com/mholt/archiver/v3/gz.go
6543 12a1f914f4
Vendor Update Go Libs ()
* update github.com/alecthomas/chroma v0.8.0 -> v0.8.1

* github.com/blevesearch/bleve v1.0.10 -> v1.0.12

* editorconfig-core-go v2.1.1 -> v2.3.7

* github.com/gliderlabs/ssh v0.2.2 -> v0.3.1

* migrate editorconfig.ParseBytes to Parse

* github.com/shurcooL/vfsgen to 0d455de96546

* github.com/go-git/go-git/v5 v5.1.0 -> v5.2.0

* github.com/google/uuid v1.1.1 -> v1.1.2

* github.com/huandu/xstrings v1.3.0 -> v1.3.2

* github.com/klauspost/compress v1.10.11 -> v1.11.1

* github.com/markbates/goth v1.61.2 -> v1.65.0

* github.com/mattn/go-sqlite3 v1.14.0 -> v1.14.4

* github.com/mholt/archiver v3.3.0 -> v3.3.2

* github.com/microcosm-cc/bluemonday 4f7140c49acb -> v1.0.4

* github.com/minio/minio-go v7.0.4 -> v7.0.5

* github.com/olivere/elastic v7.0.9 -> v7.0.20

* github.com/urfave/cli v1.20.0 -> v1.22.4

* github.com/prometheus/client_golang v1.1.0 -> v1.8.0

* github.com/xanzy/go-gitlab v0.37.0 -> v0.38.1

* mvdan.cc/xurls v2.1.0 -> v2.2.0

Co-authored-by: Lauris BH <lauris@nix.lv>
2020-10-16 01:06:27 -04:00

76 lines
1.6 KiB
Go
Vendored

package archiver
import (
"fmt"
"io"
"path/filepath"
"github.com/klauspost/compress/gzip"
"github.com/klauspost/pgzip"
)
// Gz facilitates gzip compression.
type Gz struct {
CompressionLevel int
SingleThreaded bool
}
// Compress reads in, compresses it, and writes it to out.
func (gz *Gz) Compress(in io.Reader, out io.Writer) error {
var w io.WriteCloser
var err error
if gz.SingleThreaded {
w, err = gzip.NewWriterLevel(out, gz.CompressionLevel)
} else {
w, err = pgzip.NewWriterLevel(out, gz.CompressionLevel)
}
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 (gz *Gz) Decompress(in io.Reader, out io.Writer) error {
var r io.ReadCloser
var err error
if gz.SingleThreaded {
r, err = gzip.NewReader(in)
} else {
r, err = pgzip.NewReader(in)
}
if err != nil {
return err
}
defer r.Close()
_, err = io.Copy(out, r)
return err
}
// CheckExt ensures the file extension matches the format.
func (gz *Gz) CheckExt(filename string) error {
if filepath.Ext(filename) != ".gz" {
return fmt.Errorf("filename must have a .gz extension")
}
return nil
}
func (gz *Gz) String() string { return "gz" }
// NewGz returns a new, default instance ready to be customized and used.
func NewGz() *Gz {
return &Gz{
CompressionLevel: gzip.DefaultCompression,
}
}
// Compile-time checks to ensure type implements desired interfaces.
var (
_ = Compressor(new(Gz))
_ = Decompressor(new(Gz))
)
// DefaultGz is a default instance that is conveniently ready to use.
var DefaultGz = NewGz()