mirror of
https://github.com/thangisme/notes.git
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289 lines
8.4 KiB
JavaScript
289 lines
8.4 KiB
JavaScript
var path = require('path');
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var fs = require('fs');
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module.exports = function (args, opts) {
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if (!opts) opts = {};
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var flags = { bools : {}, strings : {}, counts: {}, normalize: {}, configs: {} };
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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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[].concat(opts.string).filter(Boolean).forEach(function (key) {
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flags.strings[key] = true;
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});
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[].concat(opts.count).filter(Boolean).forEach(function (key) {
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flags.counts[key] = true;
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});
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[].concat(opts.normalize).filter(Boolean).forEach(function (key) {
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flags.normalize[key] = true;
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});
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[].concat(opts.config).filter(Boolean).forEach(function (key) {
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flags.configs[key] = true;
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});
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function toCamelCase(str) {
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return str.split('-').map(function(word, i) {
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return (i ? word[0].toUpperCase() + word.slice(1) : word);
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}).join('');
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}
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var aliases = {},
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newAliases = {};
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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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// For "--option-name", also set argv.optionName
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aliases[key].concat(key).forEach(function (x) {
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if (/-/.test(x)) {
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var c = toCamelCase(x);
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aliases[key].push(c);
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newAliases[c] = true;
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}
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});
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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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var defaults = opts['default'] || {};
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Object.keys(defaults || {}).forEach(function (key) {
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if (/-/.test(key) && !opts.alias[key]) {
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var c = toCamelCase(key);
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aliases[key] = aliases[key] || [];
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// don't allow the same key to be added multiple times.
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if (aliases[key].indexOf(c) === -1) {
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aliases[key] = (aliases[key] || []).concat(c);
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newAliases[c] = true;
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}
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}
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(aliases[key] || []).forEach(function (alias) {
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defaults[alias] = defaults[key];
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});
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});
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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 setArg (key, val) {
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if (/-/.test(key) && !(aliases[key] && aliases[key].length)) {
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var c = toCamelCase(key);
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aliases[key] = [c];
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newAliases[c] = true;
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}
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var value = !flags.strings[key] && isNumber(val) ? Number(val) : val;
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if (flags.counts[key] || flags.counts[aliases[key]]) {
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value = function(orig) { return orig !== undefined ? orig + 1 : 0; };
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}
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if (flags.configs[key]) {
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try {
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var config = JSON.parse(fs.readFileSync(val, 'utf8'));
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Object.keys(config).forEach(function (key) {
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setArg(key, config[key]);
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});
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} catch (ex) {
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console.error('Invalid JSON config file: ' + val);
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throw ex;
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}
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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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var keys = [key].concat(aliases[key] || []);
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for (var i = 0, l = keys.length; i < l; i++) {
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if (flags.normalize[keys[i]]) {
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keys.forEach(function(key) {
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argv.__defineSetter__(key, function(v) {
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val = path.normalize(v);
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});
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argv.__defineGetter__(key, function () {
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return typeof val === 'string' ?
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path.normalize(val) : val;
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});
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});
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break;
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}
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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 (arg.match(/^--.+=/)) {
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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]*)$/);
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setArg(m[1], m[2]);
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}
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else if (arg.match(/^--no-.+/)) {
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var key = arg.match(/^--no-(.+)/)[1];
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setArg(key, false);
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}
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else if (arg.match(/^--.+/)) {
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var key = arg.match(/^--(.+)/)[1];
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var next = args[i + 1];
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if (next !== undefined && !next.match(/^-/)
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&& !flags.bools[key]
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&& (aliases[key] ? !flags.bools[aliases[key]] : true)) {
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setArg(key, next);
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i++;
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}
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else if (/^(true|false)$/.test(next)) {
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setArg(key, next === 'true');
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i++;
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}
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else {
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setArg(key, true);
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}
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}
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else if (arg.match(/^-[^-]+/)) {
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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 (letters[j+1] && letters[j+1] === '=') {
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setArg(letters[j], arg.slice(j+3));
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broken = true;
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break;
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}
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if (next === '-') {
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setArg(letters[j], next)
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continue;
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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);
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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));
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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], true);
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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] ? !flags.bools[aliases[key]] : true)) {
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setArg(key, args[i+1]);
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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');
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i++;
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}
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else {
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setArg(key, true);
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}
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}
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}
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else {
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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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}
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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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Object.keys(flags.counts).forEach(function (key) {
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setArg(key, defaults[key]);
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});
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notFlags.forEach(function(key) {
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argv._.push(key);
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});
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return {
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argv: argv,
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aliases: aliases,
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newAliases: newAliases
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};
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};
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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 setKey (obj, keys, value) {
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var o = obj;
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keys.slice(0,-1).forEach(function (key) {
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if (o[key] === undefined) 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 (typeof value === 'function') {
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o[key] = value(o[key]);
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}
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else if (o[key] === undefined || 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 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 longest (xs) {
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return Math.max.apply(null, xs.map(function (x) { return x.length }));
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}
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