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263 lines
6.1 KiB
263 lines
6.1 KiB
'use strict';
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function hasKey(obj, keys) {
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var o = obj;
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keys.slice(0, -1).forEach(function (key) {
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o = o[key] || {};
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});
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var key = keys[keys.length - 1];
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return key in o;
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}
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function isNumber(x) {
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if (typeof x === 'number') { return true; }
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if ((/^0x[0-9a-f]+$/i).test(x)) { return true; }
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return (/^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/).test(x);
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}
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function isConstructorOrProto(obj, key) {
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return (key === 'constructor' && typeof obj[key] === 'function') || key === '__proto__';
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}
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module.exports = function (args, opts) {
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if (!opts) { opts = {}; }
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var flags = {
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bools: {},
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strings: {},
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unknownFn: null,
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};
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if (typeof opts.unknown === 'function') {
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flags.unknownFn = opts.unknown;
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}
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if (typeof opts.boolean === 'boolean' && opts.boolean) {
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flags.allBools = true;
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} else {
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[].concat(opts.boolean).filter(Boolean).forEach(function (key) {
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flags.bools[key] = true;
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});
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}
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var aliases = {};
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function aliasIsBoolean(key) {
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return aliases[key].some(function (x) {
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return flags.bools[x];
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});
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}
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Object.keys(opts.alias || {}).forEach(function (key) {
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aliases[key] = [].concat(opts.alias[key]);
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aliases[key].forEach(function (x) {
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aliases[x] = [key].concat(aliases[key].filter(function (y) {
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return x !== y;
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}));
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});
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});
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[].concat(opts.string).filter(Boolean).forEach(function (key) {
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flags.strings[key] = true;
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if (aliases[key]) {
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[].concat(aliases[key]).forEach(function (k) {
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flags.strings[k] = true;
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});
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}
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});
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var defaults = opts.default || {};
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var argv = { _: [] };
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function argDefined(key, arg) {
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return (flags.allBools && (/^--[^=]+$/).test(arg))
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|| flags.strings[key]
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|| flags.bools[key]
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|| aliases[key];
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}
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function setKey(obj, keys, value) {
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var o = obj;
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for (var i = 0; i < keys.length - 1; i++) {
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var key = keys[i];
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if (isConstructorOrProto(o, key)) { return; }
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if (o[key] === undefined) { o[key] = {}; }
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if (
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o[key] === Object.prototype
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|| o[key] === Number.prototype
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|| o[key] === String.prototype
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) {
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o[key] = {};
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}
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if (o[key] === Array.prototype) { o[key] = []; }
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o = o[key];
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}
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var lastKey = keys[keys.length - 1];
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if (isConstructorOrProto(o, lastKey)) { return; }
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if (
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o === Object.prototype
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|| o === Number.prototype
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|| o === String.prototype
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) {
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o = {};
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}
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if (o === Array.prototype) { o = []; }
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if (o[lastKey] === undefined || flags.bools[lastKey] || typeof o[lastKey] === 'boolean') {
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o[lastKey] = value;
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} else if (Array.isArray(o[lastKey])) {
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o[lastKey].push(value);
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} else {
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o[lastKey] = [o[lastKey], value];
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}
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}
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function setArg(key, val, arg) {
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if (arg && flags.unknownFn && !argDefined(key, arg)) {
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if (flags.unknownFn(arg) === false) { return; }
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}
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var value = !flags.strings[key] && isNumber(val)
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? Number(val)
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: val;
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setKey(argv, key.split('.'), value);
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(aliases[key] || []).forEach(function (x) {
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setKey(argv, x.split('.'), value);
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});
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}
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Object.keys(flags.bools).forEach(function (key) {
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setArg(key, defaults[key] === undefined ? false : defaults[key]);
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});
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var notFlags = [];
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if (args.indexOf('--') !== -1) {
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notFlags = args.slice(args.indexOf('--') + 1);
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args = args.slice(0, args.indexOf('--'));
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}
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for (var i = 0; i < args.length; i++) {
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var arg = args[i];
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var key;
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var next;
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if ((/^--.+=/).test(arg)) {
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// Using [\s\S] instead of . because js doesn't support the
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// 'dotall' regex modifier. See:
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// http://stackoverflow.com/a/1068308/13216
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var m = arg.match(/^--([^=]+)=([\s\S]*)$/);
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key = m[1];
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var value = m[2];
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if (flags.bools[key]) {
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value = value !== 'false';
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}
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setArg(key, value, arg);
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} else if ((/^--no-.+/).test(arg)) {
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key = arg.match(/^--no-(.+)/)[1];
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setArg(key, false, arg);
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} else if ((/^--.+/).test(arg)) {
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key = arg.match(/^--(.+)/)[1];
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next = args[i + 1];
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if (
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next !== undefined
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&& !(/^(-|--)[^-]/).test(next)
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&& !flags.bools[key]
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&& !flags.allBools
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&& (aliases[key] ? !aliasIsBoolean(key) : true)
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) {
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setArg(key, next, arg);
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i += 1;
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} else if ((/^(true|false)$/).test(next)) {
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setArg(key, next === 'true', arg);
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i += 1;
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} else {
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setArg(key, flags.strings[key] ? '' : true, arg);
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}
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} else if ((/^-[^-]+/).test(arg)) {
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var letters = arg.slice(1, -1).split('');
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var broken = false;
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for (var j = 0; j < letters.length; j++) {
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next = arg.slice(j + 2);
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if (next === '-') {
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setArg(letters[j], next, arg);
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continue;
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}
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if ((/[A-Za-z]/).test(letters[j]) && next[0] === '=') {
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setArg(letters[j], next.slice(1), arg);
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broken = true;
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break;
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}
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if (
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(/[A-Za-z]/).test(letters[j])
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&& (/-?\d+(\.\d*)?(e-?\d+)?$/).test(next)
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) {
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setArg(letters[j], next, arg);
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broken = true;
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break;
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}
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if (letters[j + 1] && letters[j + 1].match(/\W/)) {
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setArg(letters[j], arg.slice(j + 2), arg);
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broken = true;
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break;
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} else {
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setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg);
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}
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}
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key = arg.slice(-1)[0];
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if (!broken && key !== '-') {
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if (
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args[i + 1]
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&& !(/^(-|--)[^-]/).test(args[i + 1])
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&& !flags.bools[key]
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&& (aliases[key] ? !aliasIsBoolean(key) : true)
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) {
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setArg(key, args[i + 1], arg);
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i += 1;
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} else if (args[i + 1] && (/^(true|false)$/).test(args[i + 1])) {
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setArg(key, args[i + 1] === 'true', arg);
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i += 1;
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} else {
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setArg(key, flags.strings[key] ? '' : true, arg);
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}
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}
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} else {
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if (!flags.unknownFn || flags.unknownFn(arg) !== false) {
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argv._.push(flags.strings._ || !isNumber(arg) ? arg : Number(arg));
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}
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if (opts.stopEarly) {
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argv._.push.apply(argv._, args.slice(i + 1));
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break;
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}
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}
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}
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Object.keys(defaults).forEach(function (k) {
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if (!hasKey(argv, k.split('.'))) {
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setKey(argv, k.split('.'), defaults[k]);
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(aliases[k] || []).forEach(function (x) {
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setKey(argv, x.split('.'), defaults[k]);
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});
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}
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});
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if (opts['--']) {
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argv['--'] = notFlags.slice();
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} else {
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notFlags.forEach(function (k) {
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argv._.push(k);
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});
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}
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return argv;
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};
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