module cli pub enum FlagType { bool int float string } pub struct Flag { pub mut: flag FlagType name string abbrev string description string global bool required bool value string mut: found bool } pub fn (flags []Flag) get_all_found() []Flag { return flags.filter(it.found) } pub fn (flag Flag) get_bool() ?bool { if flag.flag != .bool { return error('$flag.name: Invalid flag type `$flag.flag`, expected `bool`') } return flag.value == 'true' } pub fn (flags []Flag) get_bool(name string) ?bool { flag := flags.get(name) ? return flag.get_bool() } pub fn (flag Flag) get_int() ?int { if flag.flag != .int { return error('$flag.name: Invalid flag type `$flag.flag`, expected `int`') } return flag.value.int() } pub fn (flags []Flag) get_int(name string) ?int { flag := flags.get(name) ? return flag.get_int() } pub fn (flag Flag) get_float() ?f64 { if flag.flag != .float { return error('$flag.name: Invalid flag type `$flag.flag`, expected `float`') } return flag.value.f64() } pub fn (flags []Flag) get_float(name string) ?f64 { flag := flags.get(name) ? return flag.get_float() } pub fn (flag Flag) get_string() ?string { if flag.flag != .string { return error('$flag.name: Invalid flag type `$flag.flag`, expected `string`') } return flag.value } pub fn (flags []Flag) get_string(name string) ?string { flag := flags.get(name) ? return flag.get_string() } // parse flag value from arguments and return arguments with all consumed element removed fn (mut flag Flag) parse(args []string, with_abbrev bool) ?[]string { if flag.matches(args, with_abbrev) { if flag.flag == .bool { new_args := flag.parse_bool(args) ? return new_args } else { new_args := flag.parse_raw(args) ? return new_args } } else { return args } } // check if first arg matches flag fn (mut flag Flag) matches(args []string, with_abbrev bool) bool { if with_abbrev { return (flag.name != '' && args[0] == '--$flag.name') || (flag.name != '' && args[0].starts_with('--$flag.name=')) || (flag.abbrev != '' && args[0] == '-$flag.abbrev') || (flag.abbrev != '' && args[0].starts_with('-$flag.abbrev=')) } else { return (flag.name != '' && args[0] == '-$flag.name') || (flag.name != '' && args[0].starts_with('-$flag.name=')) } } fn (mut flag Flag) parse_raw(args []string) ?[]string { if args[0].len > flag.name.len && args[0].contains('=') { flag.value = args[0].split('=')[1] return args[1..] } else if args.len >= 2 { flag.value = args[1] return args[2..] } return error('Missing argument for `$flag.name`') } fn (mut flag Flag) parse_bool(args []string) ?[]string { if args[0].len > flag.name.len && args[0].contains('=') { flag.value = args[0].split('=')[1] return args[1..] } else if args.len >= 2 { if args[1] in ['true', 'false'] { flag.value = args[1] return args[2..] } } flag.value = 'true' return args[1..] } fn (flags []Flag) get(name string) ?Flag { for flag in flags { if flag.name == name { return flag } } return error('Flag `$name` not found in $flags') } fn (flags []Flag) contains(name string) bool { for flag in flags { if flag.name == name || flag.abbrev == name { return true } } return false } fn (flags []Flag) have_abbrev() bool { mut have_abbrev := false for flag in flags { if flag.abbrev != '' { have_abbrev = true } } return have_abbrev }