pkgutil/pkg.go
func Detect() (PackageType, error) {
	for k, v := range execPackagers {
		_, err := exec.LookPath("/usr/bin/" + v)
		if err == nil {
			return PackageType(k), nil
		}
	}
	return -1, errors.New("package manager not found in directory '/usr/bin'")
}
func Detect() (PackageType, error) {
	for k, v := range execPackagers {
		_, err := exec.LookPath("/usr/bin/" + v)
		if err == nil {
			return PackageType(k), nil
		}
	}
	return -1, errors.New("package manager not found in directory '/usr/bin'")
}
// Detect tries to get the package system used in the system, looking for
// executables in directory "/usr/bin".