func()

in internal/vfs/zip/archive.go [203:234]

• 27 lines of code
• 7 McCabe index (conditional complexity)

func (a *zipArchive) Open(ctx context.Context, name string) (vfs.File, error) {
	file := a.findFile(name)
	if file == nil {
		if a.findDirectory(name) != nil {
			return nil, errNotFile
		}
		return nil, os.ErrNotExist
	}

	if !file.Mode().IsRegular() {
		return nil, errNotFile
	}

	dataOffset, err := a.fs.dataOffsetCache.FindOrFetch(a.cacheNamespace, name, func() (interface{}, error) {
		return file.DataOffset()
	})
	if err != nil {
		return nil, err
	}

	// only read from dataOffset up to the size of the compressed file
	reader := a.reader.SectionReader(ctx, dataOffset.(int64), int64(file.CompressedSize64)) //nolint:gosec

	switch file.Method {
	case zip.Deflate:
		return newDeflateReader(reader), nil
	case zip.Store:
		return reader, nil
	default:
		return nil, fmt.Errorf("unsupported compression method: %x", file.Method)
	}
}