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// Copyright 2023 Northern.tech AS
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !nozstd
// +build !nozstd
package artifact
import (
"io"
"github.com/klauspost/compress/zstd"
)
type CompressorZstd struct {
level zstd.EncoderLevel
}
func NewCompressorZstd(level zstd.EncoderLevel) Compressor {
return &CompressorZstd{
level: level,
}
}
func (c *CompressorZstd) GetFileExtension() string {
return ".zst"
}
func (c *CompressorZstd) NewReader(r io.Reader) (io.ReadCloser, error) {
zstdReader, err := zstd.NewReader(r)
if err != nil {
return nil, err
}
return zstdReader.IOReadCloser(), nil
}
func (c *CompressorZstd) NewWriter(w io.Writer) (io.WriteCloser, error) {
return zstd.NewWriter(w, zstd.WithEncoderLevel(c.level))
}
func init() {
RegisterCompressor("zstd_fastest", NewCompressorZstd(zstd.SpeedFastest))
RegisterCompressor("zstd_fast", NewCompressorZstd(zstd.SpeedDefault))
RegisterCompressor("zstd_better", NewCompressorZstd(zstd.SpeedBetterCompression))
RegisterCompressor("zstd_best", NewCompressorZstd(zstd.SpeedBestCompression))
}
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