second commit

node_modules/arg/index.js

@@ -0,0 +1,195 @@
+const flagSymbol = Symbol('arg flag');
+
+class ArgError extends Error {
+	constructor(msg, code) {
+		super(msg);
+		this.name = 'ArgError';
+		this.code = code;
+
+		Object.setPrototypeOf(this, ArgError.prototype);
+	}
+}
+
+function arg(
+	opts,
+	{
+		argv = process.argv.slice(2),
+		permissive = false,
+		stopAtPositional = false
+	} = {}
+) {
+	if (!opts) {
+		throw new ArgError(
+			'argument specification object is required',
+			'ARG_CONFIG_NO_SPEC'
+		);
+	}
+
+	const result = { _: [] };
+
+	const aliases = {};
+	const handlers = {};
+
+	for (const key of Object.keys(opts)) {
+		if (!key) {
+			throw new ArgError(
+				'argument key cannot be an empty string',
+				'ARG_CONFIG_EMPTY_KEY'
+			);
+		}
+
+		if (key[0] !== '-') {
+			throw new ArgError(
+				`argument key must start with '-' but found: '${key}'`,
+				'ARG_CONFIG_NONOPT_KEY'
+			);
+		}
+
+		if (key.length === 1) {
+			throw new ArgError(
+				`argument key must have a name; singular '-' keys are not allowed: ${key}`,
+				'ARG_CONFIG_NONAME_KEY'
+			);
+		}
+
+		if (typeof opts[key] === 'string') {
+			aliases[key] = opts[key];
+			continue;
+		}
+
+		let type = opts[key];
+		let isFlag = false;
+
+		if (
+			Array.isArray(type) &&
+			type.length === 1 &&
+			typeof type[0] === 'function'
+		) {
+			const [fn] = type;
+			type = (value, name, prev = []) => {
+				prev.push(fn(value, name, prev[prev.length - 1]));
+				return prev;
+			};
+			isFlag = fn === Boolean || fn[flagSymbol] === true;
+		} else if (typeof type === 'function') {
+			isFlag = type === Boolean || type[flagSymbol] === true;
+		} else {
+			throw new ArgError(
+				`type missing or not a function or valid array type: ${key}`,
+				'ARG_CONFIG_VAD_TYPE'
+			);
+		}
+
+		if (key[1] !== '-' && key.length > 2) {
+			throw new ArgError(
+				`short argument keys (with a single hyphen) must have only one character: ${key}`,
+				'ARG_CONFIG_SHORTOPT_TOOLONG'
+			);
+		}
+
+		handlers[key] = [type, isFlag];
+	}
+
+	for (let i = 0, len = argv.length; i < len; i++) {
+		const wholeArg = argv[i];
+
+		if (stopAtPositional && result._.length > 0) {
+			result._ = result._.concat(argv.slice(i));
+			break;
+		}
+
+		if (wholeArg === '--') {
+			result._ = result._.concat(argv.slice(i + 1));
+			break;
+		}
+
+		if (wholeArg.length > 1 && wholeArg[0] === '-') {
+			/* eslint-disable operator-linebreak */
+			const separatedArguments =
+				wholeArg[1] === '-' || wholeArg.length === 2
+					? [wholeArg]
+					: wholeArg
+							.slice(1)
+							.split('')
+							.map((a) => `-${a}`);
+			/* eslint-enable operator-linebreak */
+
+			for (let j = 0; j < separatedArguments.length; j++) {
+				const arg = separatedArguments[j];
+				const [originalArgName, argStr] =
+					arg[1] === '-' ? arg.split(/=(.*)/, 2) : [arg, undefined];
+
+				let argName = originalArgName;
+				while (argName in aliases) {
+					argName = aliases[argName];
+				}
+
+				if (!(argName in handlers)) {
+					if (permissive) {
+						result._.push(arg);
+						continue;
+					} else {
+						throw new ArgError(
+							`unknown or unexpected option: ${originalArgName}`,
+							'ARG_UNKNOWN_OPTION'
+						);
+					}
+				}
+
+				const [type, isFlag] = handlers[argName];
+
+				if (!isFlag && j + 1 < separatedArguments.length) {
+					throw new ArgError(
+						`option requires argument (but was followed by another short argument): ${originalArgName}`,
+						'ARG_MISSING_REQUIRED_SHORTARG'
+					);
+				}
+
+				if (isFlag) {
+					result[argName] = type(true, argName, result[argName]);
+				} else if (argStr === undefined) {
+					if (
+						argv.length < i + 2 ||
+						(argv[i + 1].length > 1 &&
+							argv[i + 1][0] === '-' &&
+							!(
+								argv[i + 1].match(/^-?\d*(\.(?=\d))?\d*$/) &&
+								(type === Number ||
+									// eslint-disable-next-line no-undef
+									(typeof BigInt !== 'undefined' && type === BigInt))
+							))
+					) {
+						const extended =
+							originalArgName === argName ? '' : ` (alias for ${argName})`;
+						throw new ArgError(
+							`option requires argument: ${originalArgName}${extended}`,
+							'ARG_MISSING_REQUIRED_LONGARG'
+						);
+					}
+
+					result[argName] = type(argv[i + 1], argName, result[argName]);
+					++i;
+				} else {
+					result[argName] = type(argStr, argName, result[argName]);
+				}
+			}
+		} else {
+			result._.push(wholeArg);
+		}
+	}
+
+	return result;
+}
+
+arg.flag = (fn) => {
+	fn[flagSymbol] = true;
+	return fn;
+};
+
+// Utility types
+arg.COUNT = arg.flag((v, name, existingCount) => (existingCount || 0) + 1);
+
+// Expose error class
+arg.ArgError = ArgError;
+
+module.exports = arg;