module.exports = function (args, opts) {
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if (!opts) opts = {};
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var flags = { bools : {}, strings : {}, unknownFn: null };
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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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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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flags.strings[aliases[key]] = true;
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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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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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function argDefined(key, arg) {
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return (flags.allBools && /^--[^=]+$/.test(arg)) ||
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flags.strings[key] || flags.bools[key] || aliases[key];
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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) : val
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;
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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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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 (o[key] === Object.prototype || o[key] === Number.prototype
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|| o[key] === String.prototype) o[key] = {};
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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 key = keys[keys.length - 1];
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if (isConstructorOrProto(o, key)) return;
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if (o === Object.prototype || o === Number.prototype
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|| o === String.prototype) o = {};
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if (o === Array.prototype) o = [];
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if (o[key] === undefined || flags.bools[key] || typeof o[key] === 'boolean') {
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o[key] = value;
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}
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else if (Array.isArray(o[key])) {
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o[key].push(value);
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}
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else {
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o[key] = [ o[key], value ];
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}
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}
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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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for (var i = 0; i < args.length; i++) {
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var arg = args[i];
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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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var 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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}
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else if (/^--no-.+/.test(arg)) {
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var key = arg.match(/^--no-(.+)/)[1];
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setArg(key, false, arg);
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}
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else if (/^--.+/.test(arg)) {
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var key = arg.match(/^--(.+)/)[1];
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var next = args[i + 1];
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if (next !== undefined && !/^-/.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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setArg(key, next, arg);
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i++;
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}
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else if (/^(true|false)$/.test(next)) {
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setArg(key, next === 'true', arg);
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i++;
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}
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else {
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setArg(key, flags.strings[key] ? '' : true, arg);
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}
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}
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else if (/^-[^-]+/.test(arg)) {
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var letters = arg.slice(1,-1).split('');
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var broken = false;
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for (var j = 0; j < letters.length; j++) {
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var next = arg.slice(j+2);
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if (next === '-') {
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setArg(letters[j], next, arg)
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continue;
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}
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if (/[A-Za-z]/.test(letters[j]) && /=/.test(next)) {
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setArg(letters[j], next.split('=')[1], arg);
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broken = true;
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break;
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}
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if (/[A-Za-z]/.test(letters[j])
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&& /-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
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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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}
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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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var key = arg.slice(-1)[0];
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if (!broken && key !== '-') {
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if (args[i+1] && !/^(-|--)[^-]/.test(args[i+1])
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&& !flags.bools[key]
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&& (aliases[key] ? !aliasIsBoolean(key) : true)) {
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setArg(key, args[i+1], arg);
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i++;
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}
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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++;
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}
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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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}
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else {
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if (!flags.unknownFn || flags.unknownFn(arg) !== false) {
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argv._.push(
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flags.strings['_'] || !isNumber(arg) ? arg : Number(arg)
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);
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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 (key) {
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if (!hasKey(argv, key.split('.'))) {
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setKey(argv, key.split('.'), defaults[key]);
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(aliases[key] || []).forEach(function (x) {
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setKey(argv, x.split('.'), defaults[key]);
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});
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}
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});
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if (opts['--']) {
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argv['--'] = new Array();
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notFlags.forEach(function(key) {
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argv['--'].push(key);
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});
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}
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else {
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notFlags.forEach(function(key) {
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argv._.push(key);
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});
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}
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return argv;
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};
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function hasKey (obj, keys) {
|
var o = obj;
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keys.slice(0,-1).forEach(function (key) {
|
o = (o[key] || {});
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});
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|
var key = keys[keys.length - 1];
|
return key in o;
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}
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function isNumber (x) {
|
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) {
|
return key === 'constructor' && typeof obj[key] === 'function' || key === '__proto__';
|
}
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