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- 'use strict';
- // classic singleton yargs API, to use yargs
- // without running as a singleton do:
- // require('yargs/yargs')(process.argv.slice(2))
- const {Yargs, processArgv} = require('./build/index.cjs');
- Argv(processArgv.hideBin(process.argv));
- module.exports = Argv;
- function Argv(processArgs, cwd) {
- const argv = Yargs(processArgs, cwd, require);
- singletonify(argv);
- // TODO(bcoe): warn if argv.parse() or argv.argv is used directly.
- return argv;
- }
- function defineGetter(obj, key, getter) {
- Object.defineProperty(obj, key, {
- configurable: true,
- enumerable: true,
- get: getter,
- });
- }
- function lookupGetter(obj, key) {
- const desc = Object.getOwnPropertyDescriptor(obj, key);
- if (typeof desc !== 'undefined') {
- return desc.get;
- }
- }
- /* Hack an instance of Argv with process.argv into Argv
- so people can do
- require('yargs')(['--beeble=1','-z','zizzle']).argv
- to parse a list of args and
- require('yargs').argv
- to get a parsed version of process.argv.
- */
- function singletonify(inst) {
- [
- ...Object.keys(inst),
- ...Object.getOwnPropertyNames(inst.constructor.prototype),
- ].forEach(key => {
- if (key === 'argv') {
- defineGetter(Argv, key, lookupGetter(inst, key));
- } else if (typeof inst[key] === 'function') {
- Argv[key] = inst[key].bind(inst);
- } else {
- defineGetter(Argv, '$0', () => inst.$0);
- defineGetter(Argv, 'parsed', () => inst.parsed);
- }
- });
- }
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