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