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gitea/vendor/github.com/mholt/archiver/v3/filecompressor.go

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package archiver
import (
"fmt"
"os"
)
// FileCompressor can compress and decompress single files.
type FileCompressor struct {
Compressor
Decompressor
// Whether to overwrite existing files when creating files.
OverwriteExisting bool
}
// CompressFile reads the source file and compresses it to destination.
// The destination must have a matching extension.
func (fc FileCompressor) CompressFile(source, destination string) error {
if err := fc.CheckExt(destination); err != nil {
return err
}
if fc.Compressor == nil {
return fmt.Errorf("no compressor specified")
}
if !fc.OverwriteExisting && fileExists(destination) {
return fmt.Errorf("file exists: %s", destination)
}
in, err := os.Open(source)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(destination)
if err != nil {
return err
}
defer out.Close()
return fc.Compress(in, out)
}
// DecompressFile reads the source file and decompresses it to destination.
func (fc FileCompressor) DecompressFile(source, destination string) error {
if fc.Decompressor == nil {
return fmt.Errorf("no decompressor specified")
}
if !fc.OverwriteExisting && fileExists(destination) {
return fmt.Errorf("file exists: %s", destination)
}
in, err := os.Open(source)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(destination)
if err != nil {
return err
}
defer out.Close()
return fc.Decompress(in, out)
}