V coreutils starter

start.v

module main

import flag
import os

const (
	app_name        = 'LeName'
	app_version     = 'v0.0.1'
	app_description = 'LeName is a starter template'
)

struct Settings {
	string_arg string // --flag=something
	bool_arg   bool   // --flag
}

///===================================================================///
///                       Main Logic                                  ///
///===================================================================///

fn main() {
	seq(args())
}

fn seq(settings Settings) {
	println('Hello!: settings recieved')
	println(settings)
}

///===================================================================///
///                       Helper Functions                            ///
///===================================================================///
fn do_help() {
	println('helping')
}

///===================================================================///
///                                Args                               ///
///===================================================================///

fn args() Settings {
	mut fp := flag.new_flag_parser(os.args)
	fp.application(app_name)
	fp.version(app_version)
	fp.description(app_description)
	fp.skip_executable()

	// need to change this
	string_arg := fp.string('flag', `f`, 'default value', 'help text here')
	bool_arg   := fp.bool('long-flag', `l`, false, 'help text: this defaults to false')

	help       := fp.bool('help', 0, false, 'display this help and exit')
	version    := fp.bool('version', 0, false, 'output version information and exit')

	// extra arguments -a -b -c arg1 arg2 arg3
	// arg1..3 will be taken
	// flags used that are not specified will panic
	fnames := fp.finalize() or {
		eprintln(err)
		println(fp.usage())
		exit(1)
	}

	if help {
		println(fp.usage())
		exit(0)
	}
	if version {
		println('$app_name $app_version')
		exit(0)
	}

	return Settings{string_arg, bool_arg}
}