97 lines
1.8 KiB
Go
97 lines
1.8 KiB
Go
package getter
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import (
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"archive/zip"
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"fmt"
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"io"
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"os"
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"path/filepath"
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)
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// ZipDecompressor is an implementation of Decompressor that can
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// decompress tar.gzip files.
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type ZipDecompressor struct{}
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func (d *ZipDecompressor) Decompress(dst, src string, dir bool) error {
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// If we're going into a directory we should make that first
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mkdir := dst
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if !dir {
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mkdir = filepath.Dir(dst)
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}
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if err := os.MkdirAll(mkdir, 0755); err != nil {
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return err
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}
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// Open the zip
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zipR, err := zip.OpenReader(src)
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if err != nil {
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return err
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}
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defer zipR.Close()
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// Check the zip integrity
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if len(zipR.File) == 0 {
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// Empty archive
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return fmt.Errorf("empty archive: %s", src)
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}
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if !dir && len(zipR.File) > 1 {
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return fmt.Errorf("expected a single file: %s", src)
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}
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// Go through and unarchive
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for _, f := range zipR.File {
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path := dst
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if dir {
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path = filepath.Join(path, f.Name)
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}
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if f.FileInfo().IsDir() {
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if !dir {
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return fmt.Errorf("expected a single file: %s", src)
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}
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// A directory, just make the directory and continue unarchiving...
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if err := os.MkdirAll(path, 0755); err != nil {
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return err
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}
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continue
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}
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// Create the enclosing directories if we must. ZIP files aren't
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// required to contain entries for just the directories so this
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// can happen.
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if dir {
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if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
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return err
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}
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}
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// Open the file for reading
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srcF, err := f.Open()
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if err != nil {
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return err
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}
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// Open the file for writing
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dstF, err := os.Create(path)
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if err != nil {
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srcF.Close()
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return err
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}
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_, err = io.Copy(dstF, srcF)
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srcF.Close()
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dstF.Close()
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if err != nil {
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return err
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}
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// Chmod the file
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if err := os.Chmod(path, f.Mode()); err != nil {
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return err
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}
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}
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return nil
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}
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