func isTarGz()

in pkg/3p/archiver/targz.go [28:48]

• 18 lines of code
• 5 McCabe index (conditional complexity)

func isTarGz(targzPath string) bool {
	f, err := os.Open(targzPath)
	if err != nil {
		return false
	}
	defer f.Close()

	gzr, err := gzip.NewReader(f)
	if err != nil {
		return false
	}
	defer gzr.Close()

	buf := make([]byte, tarBlockSize)
	n, err := gzr.Read(buf)
	if err != nil || n < tarBlockSize {
		return false
	}

	return hasTarHeader(buf)
}