[viniciusfdasilva]

Add suport to execute shell scripts on v REPL

Implementation code change on vrepl.v

fn repl_help() {
	println(version.full_v_version(false))
	println('
	|help                   Displays this information.
	|list                   Show the program so far.
	|reset                  Clears the accumulated program, so you can start a fresh.
	|Ctrl-C, Ctrl-D, exit   Exits the REPL.
	|clear                  Clears the screen.
	|pin                    Pins the entered program to the top.
	|!sh [COMMAND]          Execute on REPL shell commands.
'.strip_margin())
}

fn run_shell(command string) {
	if command.len >= 2 && command[0..2] == 'cd' {
		command_splited := command.split(' ')
		assert command_splited.len >= 2
		dir := command_splited[command_splited.len - 1]

		os.chdir(dir) or { eprintln('`${command}` failed, err: ${err}') }
	} else {
		os.system(command)
	}
}

if r.line.len > 4 && r.line[0..3] == '!sh' {
	run_shell(r.line[4..r.line.len])
	continue
}

Implementation working

Tested implementation!

v fmt -w cmd/tools/vrepl.v Execution result

[Delta456]

I don't understand the need for this. One can always import os and use the system function to achieve the same functionality.

[viniciusfdasilva]

• Well, its more easy to REPL user type direct shell commands than call every time os library functions!
• In this case it was implemented for users that execute a lot of library functions only change directory, create files, see process running, etc...
• This is to make user interact with operating system without exit of V REPL without execute a lot os library functions!

[spytheman]

@Delta456 It is a good feature. ipython for example has ! for this, try ! ls -la for example or ! df /.

[spytheman]

@viniciusfdasilva please do v fmt -w cmd/tools/vrepl.v and push the result too.

[spytheman]

Excellent work.
Thank you for your first PR.