mirror of
https://github.com/thangisme/notes.git
synced 2024-10-31 23:27:32 -04:00
639 lines
18 KiB
JavaScript
639 lines
18 KiB
JavaScript
var path = require('path');
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var minimist = require('./lib/minimist');
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var wordwrap = require('./lib/wordwrap');
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/* Hack an instance of Argv with process.argv into Argv
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so people can do
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require('yargs')(['--beeble=1','-z','zizzle']).argv
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to parse a list of args and
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require('yargs').argv
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to get a parsed version of process.argv.
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*/
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var inst = Argv(process.argv.slice(2));
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Object.keys(inst).forEach(function (key) {
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Argv[key] = typeof inst[key] == 'function'
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? inst[key].bind(inst)
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: inst[key];
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});
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var exports = module.exports = Argv;
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function Argv (processArgs, cwd) {
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var self = {};
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if (!cwd) cwd = process.cwd();
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self.$0 = process.argv
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.slice(0,2)
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.map(function (x) {
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var b = rebase(cwd, x);
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return x.match(/^\//) && b.length < x.length
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? b : x
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})
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.join(' ')
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;
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if (process.env._ != undefined && process.argv[1] == process.env._) {
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self.$0 = process.env._.replace(
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path.dirname(process.execPath) + '/', ''
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);
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}
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var options;
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self.resetOptions = function () {
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options = {
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boolean: [],
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string: [],
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alias: {},
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default: [],
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requiresArg: [],
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count: [],
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normalize: [],
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config: []
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};
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return self;
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};
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self.resetOptions();
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self.boolean = function (bools) {
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options.boolean.push.apply(options.boolean, [].concat(bools));
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return self;
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};
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self.normalize = function (strings) {
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options.normalize.push.apply(options.normalize, [].concat(strings));
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return self;
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};
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self.config = function (configs) {
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options.config.push.apply(options.config, [].concat(configs));
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return self;
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};
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var examples = [];
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self.example = function (cmd, description) {
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examples.push([cmd, description]);
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return self;
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};
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self.string = function (strings) {
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options.string.push.apply(options.string, [].concat(strings));
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return self;
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};
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self.default = function (key, value) {
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if (typeof key === 'object') {
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Object.keys(key).forEach(function (k) {
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self.default(k, key[k]);
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});
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}
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else {
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options.default[key] = value;
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}
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return self;
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};
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self.alias = function (x, y) {
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if (typeof x === 'object') {
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Object.keys(x).forEach(function (key) {
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self.alias(key, x[key]);
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});
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}
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else {
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options.alias[x] = (options.alias[x] || []).concat(y);
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}
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return self;
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};
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self.count = function(counts) {
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options.count.push.apply(options.count, [].concat(counts));
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return self;
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};
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var demanded = {};
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self.demand = self.required = self.require = function (keys, msg) {
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if (typeof keys == 'number') {
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if (!demanded._) demanded._ = { count: 0, msg: null };
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demanded._.count += keys;
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demanded._.msg = msg;
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}
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else if (Array.isArray(keys)) {
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keys.forEach(function (key) {
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self.demand(key, msg);
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});
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}
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else {
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if (typeof msg === 'string') {
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demanded[keys] = { msg: msg };
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}
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else if (msg === true || typeof msg === 'undefined') {
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demanded[keys] = { msg: null };
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}
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}
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return self;
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};
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self.requiresArg = function (requiresArgs) {
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options.requiresArg.push.apply(options.requiresArg, [].concat(requiresArgs));
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return self;
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};
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var implied = {};
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self.implies = function (key, value) {
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if (typeof key === 'object') {
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Object.keys(key).forEach(function (k) {
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self.implies(k, key[k]);
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});
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} else {
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implied[key] = value;
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}
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return self;
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};
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var usage;
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self.usage = function (msg, opts) {
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if (!opts && typeof msg === 'object') {
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opts = msg;
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msg = null;
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}
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usage = msg;
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if (opts) self.options(opts);
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return self;
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};
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var fails = [];
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self.fail = function (f) {
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fails.push(f);
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return self;
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};
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function fail (msg) {
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if (fails.length) {
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fails.forEach(function (f) {
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f(msg);
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});
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} else {
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if (showHelpOnFail) {
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self.showHelp();
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}
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if (msg) console.error(msg);
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if (failMessage) {
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if (msg) {
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console.error("");
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}
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console.error(failMessage);
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}
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process.exit(1);
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}
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}
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var checks = [];
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self.check = function (f) {
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checks.push(f);
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return self;
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};
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self.defaults = self.default;
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var descriptions = {};
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self.describe = function (key, desc) {
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if (typeof key === 'object') {
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Object.keys(key).forEach(function (k) {
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self.describe(k, key[k]);
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});
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}
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else {
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descriptions[key] = desc;
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}
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return self;
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};
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self.parse = function (args) {
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return parseArgs(args);
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};
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self.option = self.options = function (key, opt) {
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if (typeof key === 'object') {
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Object.keys(key).forEach(function (k) {
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self.options(k, key[k]);
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});
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}
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else {
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if (opt.alias) self.alias(key, opt.alias);
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var demand = opt.demand || opt.required || opt.require;
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if (demand) {
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self.demand(key, demand);
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}
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if (typeof opt.default !== 'undefined') {
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self.default(key, opt.default);
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}
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if (opt.boolean || opt.type === 'boolean') {
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self.boolean(key);
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if (opt.alias) self.boolean(opt.alias);
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}
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if (opt.string || opt.type === 'string') {
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self.string(key);
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if (opt.alias) self.string(opt.alias);
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}
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if (opt.count || opt.type === 'count') {
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self.count(key);
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}
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var desc = opt.describe || opt.description || opt.desc;
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if (desc) {
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self.describe(key, desc);
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}
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if (opt.requiresArg) {
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self.requiresArg(key);
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}
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}
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return self;
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};
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var wrap = null;
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self.wrap = function (cols) {
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wrap = cols;
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return self;
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};
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var strict = false;
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self.strict = function () {
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strict = true;
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return self;
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};
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self.showHelp = function (fn) {
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if (!fn) fn = console.error.bind(console);
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fn(self.help());
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return self;
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};
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var version = null;
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var versionOpt = null;
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self.version = function (ver, opt, msg) {
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version = ver;
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versionOpt = opt;
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self.describe(opt, msg || 'Show version number');
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return self;
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};
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var helpOpt = null;
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self.addHelpOpt = function (opt, msg) {
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helpOpt = opt;
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self.describe(opt, msg || 'Show help');
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return self;
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};
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var failMessage = null;
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var showHelpOnFail = true;
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self.showHelpOnFail = function (enabled, message) {
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if (typeof enabled === 'string') {
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enabled = true;
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message = enabled;
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}
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else if (typeof enabled === 'undefined') {
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enabled = true;
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}
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failMessage = message;
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showHelpOnFail = enabled;
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return self;
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};
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self.help = function () {
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if (arguments.length > 0) {
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return self.addHelpOpt.apply(self, arguments);
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}
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var keys = Object.keys(
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Object.keys(descriptions)
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.concat(Object.keys(demanded))
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.concat(Object.keys(options.default))
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.reduce(function (acc, key) {
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if (key !== '_') acc[key] = true;
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return acc;
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}, {})
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);
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var help = keys.length ? [ 'Options:' ] : [];
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if (examples.length) {
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help.unshift('');
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examples.forEach(function (example) {
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example[0] = example[0].replace(/\$0/g, self.$0);
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});
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var commandlen = longest(examples.map(function (a) {
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return a[0];
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}));
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var exampleLines = examples.map(function(example) {
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var command = example[0];
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var description = example[1];
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command += Array(commandlen + 5 - command.length).join(' ');
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return ' ' + command + description;
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});
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exampleLines.push('');
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help = exampleLines.concat(help);
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help.unshift('Examples:');
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}
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if (usage) {
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help.unshift(usage.replace(/\$0/g, self.$0), '');
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}
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var aliasKeys = (Object.keys(options.alias) || [])
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.concat(Object.keys(self.parsed.newAliases) || []);
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keys = keys.filter(function(key) {
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return !self.parsed.newAliases[key] && aliasKeys.every(function(alias) {
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return -1 == (options.alias[alias] || []).indexOf(key);
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});
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});
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var switches = keys.reduce(function (acc, key) {
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acc[key] = [ key ].concat(options.alias[key] || [])
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.map(function (sw) {
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return (sw.length > 1 ? '--' : '-') + sw
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})
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.join(', ')
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;
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return acc;
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}, {});
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var switchlen = longest(Object.keys(switches).map(function (s) {
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return switches[s] || '';
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}));
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var desclen = longest(Object.keys(descriptions).map(function (d) {
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return descriptions[d] || '';
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}));
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keys.forEach(function (key) {
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var kswitch = switches[key];
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var desc = descriptions[key] || '';
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if (wrap) {
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desc = wordwrap(switchlen + 4, wrap)(desc)
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.slice(switchlen + 4)
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;
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}
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var spadding = new Array(
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Math.max(switchlen - kswitch.length + 3, 0)
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).join(' ');
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var dpadding = new Array(
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Math.max(desclen - desc.length + 1, 0)
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).join(' ');
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var type = null;
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if (options.boolean[key]) type = '[boolean]';
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if (options.count[key]) type = '[count]';
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if (options.string[key]) type = '[string]';
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if (options.normalize[key]) type = '[string]';
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if (!wrap && dpadding.length > 0) {
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desc += dpadding;
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}
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var prelude = ' ' + kswitch + spadding;
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var extra = [
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type,
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demanded[key]
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? '[required]'
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: null
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,
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options.default[key] !== undefined
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? '[default: ' + (typeof options.default[key] === 'string' ?
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JSON.stringify : String)(options.default[key]) + ']'
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: null
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].filter(Boolean).join(' ');
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var body = [ desc, extra ].filter(Boolean).join(' ');
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if (wrap) {
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var dlines = desc.split('\n');
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var dlen = dlines.slice(-1)[0].length
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+ (dlines.length === 1 ? prelude.length : 0)
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body = desc + (dlen + extra.length > wrap - 2
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? '\n'
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+ new Array(wrap - extra.length + 1).join(' ')
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+ extra
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: new Array(wrap - extra.length - dlen + 1).join(' ')
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+ extra
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);
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}
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help.push(prelude + body);
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});
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if (keys.length) help.push('');
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return help.join('\n');
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};
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Object.defineProperty(self, 'argv', {
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get : function () { return parseArgs(processArgs) },
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enumerable : true
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});
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function parseArgs (args) {
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var parsed = minimist(args, options),
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argv = parsed.argv,
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aliases = parsed.aliases;
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argv.$0 = self.$0;
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self.parsed = parsed;
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Object.keys(argv).forEach(function(key) {
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if (key === helpOpt) {
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self.showHelp(console.log);
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process.exit(0);
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}
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else if (key === versionOpt) {
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process.stdout.write(version);
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process.exit(0);
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}
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});
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if (demanded._ && argv._.length < demanded._.count) {
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if (demanded._.msg) {
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fail(demanded._.msg);
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} else {
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fail('Not enough non-option arguments: got '
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+ argv._.length + ', need at least ' + demanded._.count
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);
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}
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}
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if (options.requiresArg.length > 0) {
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var missingRequiredArgs = [];
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options.requiresArg.forEach(function(key) {
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var value = argv[key];
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// minimist sets --foo value to true / --no-foo to false
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if (value === true || value === false) {
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missingRequiredArgs.push(key);
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}
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});
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if (missingRequiredArgs.length == 1) {
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fail("Missing argument value: " + missingRequiredArgs[0]);
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}
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else if (missingRequiredArgs.length > 1) {
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message = "Missing argument values: " + missingRequiredArgs.join(", ");
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fail(message);
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}
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}
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var missing = null;
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Object.keys(demanded).forEach(function (key) {
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if (!argv.hasOwnProperty(key)) {
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missing = missing || {};
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missing[key] = demanded[key];
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}
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});
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if (missing) {
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var customMsgs = [];
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Object.keys(missing).forEach(function(key) {
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var msg = missing[key].msg;
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if (msg && customMsgs.indexOf(msg) < 0) {
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customMsgs.push(msg);
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}
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});
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var customMsg = customMsgs.length ? '\n' + customMsgs.join('\n') : '';
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fail('Missing required arguments: ' + Object.keys(missing).join(', ') + customMsg);
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}
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if (strict) {
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var unknown = [];
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var aliases = {};
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Object.keys(parsed.aliases).forEach(function (key) {
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parsed.aliases[key].forEach(function (alias) {
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aliases[alias] = key;
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});
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});
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Object.keys(argv).forEach(function (key) {
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if (key !== "$0" && key !== "_" &&
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!descriptions.hasOwnProperty(key) &&
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!demanded.hasOwnProperty(key) &&
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!aliases.hasOwnProperty(key)) {
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unknown.push(key);
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}
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});
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if (unknown.length == 1) {
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fail("Unknown argument: " + unknown[0]);
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}
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else if (unknown.length > 1) {
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fail("Unknown arguments: " + unknown.join(", "));
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}
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}
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checks.forEach(function (f) {
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try {
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var result = f(argv, aliases);
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if (result === false) {
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fail('Argument check failed: ' + f.toString());
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} else if (typeof result === 'string') {
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fail(result);
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}
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}
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catch (err) {
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fail(err)
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}
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});
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var implyFail = [];
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Object.keys(implied).forEach(function (key) {
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var num, origKey = key, value = implied[key];
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// convert string '1' to number 1
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var num = Number(key);
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key = isNaN(num) ? key : num;
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if (typeof key === 'number') {
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// check length of argv._
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key = argv._.length >= key;
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} else if (key.match(/^--no-.+/)) {
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// check if key doesn't exist
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key = key.match(/^--no-(.+)/)[1];
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key = !argv[key];
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} else {
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// check if key exists
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key = argv[key];
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}
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num = Number(value);
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value = isNaN(num) ? value : num;
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if (typeof value === 'number') {
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value = argv._.length >= value;
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} else if (value.match(/^--no-.+/)) {
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value = value.match(/^--no-(.+)/)[1];
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value = !argv[value];
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} else {
|
|
value = argv[value];
|
|
}
|
|
|
|
if (key && !value) {
|
|
implyFail.push(origKey);
|
|
}
|
|
});
|
|
|
|
if (implyFail.length) {
|
|
var msg = 'Implications failed:\n';
|
|
|
|
implyFail.forEach(function (key) {
|
|
msg += (' ' + key + ' -> ' + implied[key] + '\n');
|
|
});
|
|
|
|
fail(msg);
|
|
}
|
|
|
|
return argv;
|
|
}
|
|
|
|
function longest (xs) {
|
|
return Math.max.apply(
|
|
null,
|
|
xs.map(function (x) { return x.length })
|
|
);
|
|
}
|
|
|
|
return self;
|
|
};
|
|
|
|
// rebase an absolute path to a relative one with respect to a base directory
|
|
// exported for tests
|
|
exports.rebase = rebase;
|
|
function rebase (base, dir) {
|
|
var ds = path.normalize(dir).split('/').slice(1);
|
|
var bs = path.normalize(base).split('/').slice(1);
|
|
|
|
for (var i = 0; ds[i] && ds[i] == bs[i]; i++);
|
|
ds.splice(0, i); bs.splice(0, i);
|
|
|
|
var p = path.normalize(
|
|
bs.map(function () { return '..' }).concat(ds).join('/')
|
|
).replace(/\/$/,'').replace(/^$/, '.');
|
|
return p.match(/^[.\/]/) ? p : './' + p;
|
|
};
|