Method exec

exec.go:102–129

exec runs an ExecCommand and delivers the results to the program as a Msg.

(c ExecCommand, fn ExecCallback)

// exec runs an ExecCommand and delivers the results to the program as a Msg.
func (p *Program) exec(c ExecCommand, fn ExecCallback) {
	if err := p.releaseTerminal(false); err != nil {
		// If we can't release input, abort.
		if fn != nil {
			go p.Send(fn(err))
		}
		return
	}

	c.SetStdin(p.input)
	c.SetStdout(p.output)
	c.SetStderr(os.Stderr)

	// Execute system command.
	if err := c.Run(); err != nil {
		_ = p.RestoreTerminal() // also try to restore the terminal.
		if fn != nil {
			go p.Send(fn(err))
		}
		return
	}

	// Have the program re-capture input.
	err := p.RestoreTerminal()
	if fn != nil {
		go p.Send(fn(err))
	}
}