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