mirror of https://github.com/containers/podman.git
69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
package compression
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import (
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"io"
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"io/fs"
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"os"
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"github.com/containers/image/v5/pkg/compression"
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"github.com/sirupsen/logrus"
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)
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type genericDecompressor struct {
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compressedFilePath string
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compressedFile *os.File
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decompressedFileReader io.ReadCloser
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compressedFileInfo os.FileInfo
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}
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func newGenericDecompressor(compressedFilePath string) (*genericDecompressor, error) {
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d := &genericDecompressor{}
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d.compressedFilePath = compressedFilePath
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stat, err := os.Stat(d.compressedFilePath)
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if err != nil {
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return nil, err
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}
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d.compressedFileInfo = stat
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return d, nil
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}
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func (d *genericDecompressor) compressedFileSize() int64 {
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return d.compressedFileInfo.Size()
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}
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func (d *genericDecompressor) compressedFileMode() fs.FileMode {
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return d.compressedFileInfo.Mode()
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}
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func (d *genericDecompressor) compressedFileReader() (io.ReadCloser, error) {
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compressedFile, err := os.Open(d.compressedFilePath)
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if err != nil {
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return nil, err
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}
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d.compressedFile = compressedFile
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return compressedFile, nil
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}
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func (d *genericDecompressor) decompress(w WriteSeekCloser, r io.Reader) error {
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decompressedFileReader, _, err := compression.AutoDecompress(r)
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if err != nil {
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return err
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}
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d.decompressedFileReader = decompressedFileReader
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_, err = io.Copy(w, decompressedFileReader)
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return err
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}
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func (d *genericDecompressor) close() {
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if err := d.compressedFile.Close(); err != nil {
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logrus.Errorf("Unable to close compressed file: %q", err)
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}
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if d.decompressedFileReader != nil {
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if err := d.decompressedFileReader.Close(); err != nil {
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logrus.Errorf("Unable to close uncompressed stream: %q", err)
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}
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}
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}
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