runner

type Runner interface {
	// Run executes a command, returning combined output and error.
	Run(name string, args ...string) ([]byte, error)
	// RunAttached executes a command with stdin/stdout/stderr attached to the terminal.
	RunAttached(name string, args ...string) error
	// RunBackground starts a command detached from the terminal and returns immediately.
	// Stdin/stdout/stderr are connected to /dev/null.
	RunBackground(name string, args ...string) error
	// LookPath checks if a binary is in PATH.
	LookPath(name string) (string, error)
}

type SystemRunner struct{}