module shell

import strings.textscanner

const safe_chars = '%+,-./0123456789:=@ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz'

// quote returns a shell-escaped version of string `s`.
pub fn quote(s string) string {
	if s == '' {
		return "''"
	}
	if s.is_pure_ascii() && s.contains_only(safe_chars) {
		return s
	}
	return "'" + s.replace("'", '\'"\'"\'') + "'"
}

// join joins `s` array members into a shell-escaped string.
pub fn join(s []string) string {
	mut quoted_args := []string{}
	for arg in s {
		quoted_args << quote(arg)
	}
	return quoted_args.join(' ')
}

// // join_all joins their arguments into a shell-escaped string.
// pub fn join_all(s ...string) string {
// 	return join(s)
// }

// split splits the string `s` into array using shell-like syntax.
pub fn split(s string) []string {
	return []string{}
}

pub struct Lexer {
pub:
	posix_mode    bool   = true
	comment_chars string = '#'
pub mut:
	tokens []string
}

pub fn (mut x Lexer) process(s string) {
}