FM / arg

/opt/canhelp/node_modules/arg

Name	Size	Mode	Actions
index.d.ts	891	0644	edit dl rm
index.js	4464	0644	edit dl rm
LICENSE.md	1079	0644	edit dl rm
package.json	589	0644	edit dl rm
README.md	6642	0644	edit dl rm

Edit: /opt/canhelp/node_modules/arg/index.js (4464B)

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;

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