65   is(arg) {  argument
66     return this.short === arg || this.long === arg;
307     args.forEach((arg) => {
314       switch (arg[0]) {
317           argDetails.name = arg.slice(1, -1);
320           argDetails.name = arg.slice(1, -1);
332     this._args.forEach((arg, i) => {
333       if (arg.variadic && i < this._args.length - 1) {
334         throw new Error(`only the last argument can be variadic '${arg.name}'`);
584   allowUnknownOption(arg) {  argument
585     this._allowUnknownOption = (arg === undefined) || arg;
906         this._args.forEach((arg, i) => {
907           if (arg.required && args[i] == null) {
908             this.missingArgument(arg.name);
909           } else if (arg.variadic) {
951   _findOption(arg) {  argument
952     return this.options.find(option => option.is(arg));
996     function maybeOption(arg) {  argument
997       return arg.length > 1 && arg[0] === '-';
1002       const arg = args.shift();
1005       if (arg === '--') {
1006         if (dest === unknown) dest.push(arg);
1011       if (maybeOption(arg)) {
1012         const option = this._findOption(arg);
1034       if (arg.length > 2 && arg[0] === '-' && arg[1] !== '-') {
1035         const option = this._findOption(`-${arg[1]}`);
1039             this.emit(`option:${option.name()}`, arg.slice(2));
1043             args.unshift(`-${arg.slice(2)}`);
1050       if (/^--[^=]+=/.test(arg)) {
1051         const index = arg.indexOf('=');
1052         const option = this._findOption(arg.slice(0, index));
1054           this.emit(`option:${option.name()}`, arg.slice(index + 1));
1060       if (arg.length > 1 && arg[0] === '-') {
1065       dest.push(arg);
1270       const args = this._args.map((arg) => {
1271         return humanReadableArgName(arg);
1307       const args = cmd._args.map((arg) => {
1308         return humanReadableArgName(arg);
1366     return this._args.reduce((max, arg) => {
1367       return Math.max(max, arg.name.length);
1481         this._args.forEach((arg) => {
1482 …desc.push('  ' + pad(arg.name, width) + '  ' + wrap(argsDescription[arg.name], descriptionWidth, w…
1687   const helpOption = args.find(arg => arg === cmd._helpLongFlag || arg === cmd._helpShortFlag);
1703 function humanReadableArgName(arg) {  argument
1704   const nameOutput = arg.name + (arg.variadic === true ? '...' : '');
1706   return arg.required
1724   return args.map((arg) => {
1725     let result = arg;
1726     if (arg.indexOf('--inspect') === 0) {
1731       if ((match = arg.match(/^(--inspect(-brk)?)$/)) !== null) {
1734       } else if ((match = arg.match(/^(--inspect(-brk|-port)?)=([^:]+)$/)) !== null) {
1743       } else if ((match = arg.match(/^(--inspect(-brk|-port)?)=([^:]+):(\d+)$/)) !== null) {