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- 'use strict';
- const path = require('path');
- const buildMinimistOptions = require('minimist-options');
- const minimist = require('minimist');
- const camelcaseKeys = require('camelcase-keys');
- const decamelizeKeys = require('decamelize-keys');
- const trimNewlines = require('trim-newlines');
- const redent = require('redent');
- const readPkgUp = require('read-pkg-up');
- const loudRejection = require('loud-rejection');
- const normalizePackageData = require('normalize-package-data');
-
- // Prevent caching of this module so module.parent is always accurate
- delete require.cache[__filename];
- const parentDir = path.dirname(module.parent.filename);
-
- module.exports = (helpMessage, opts) => {
- loudRejection();
-
- if (typeof helpMessage === 'object' && !Array.isArray(helpMessage)) {
- opts = helpMessage;
- helpMessage = '';
- }
-
- opts = Object.assign({
- pkg: readPkgUp.sync({
- cwd: parentDir,
- normalize: false
- }).pkg || {},
- argv: process.argv.slice(2),
- inferType: false,
- input: 'string',
- help: helpMessage,
- autoHelp: true,
- autoVersion: true
- }, opts);
-
- let minimistOpts = Object.assign({
- arguments: opts.input
- }, opts.flags);
-
- minimistOpts = decamelizeKeys(minimistOpts, '-', {exclude: ['stopEarly', '--']});
-
- if (opts.inferType) {
- delete minimistOpts.arguments;
- }
-
- minimistOpts = buildMinimistOptions(minimistOpts);
-
- const pkg = opts.pkg;
- const argv = minimist(opts.argv, minimistOpts);
- let help = redent(trimNewlines((opts.help || '').replace(/\t+\n*$/, '')), 2);
-
- normalizePackageData(pkg);
-
- process.title = pkg.bin ? Object.keys(pkg.bin)[0] : pkg.name;
-
- let description = opts.description;
- if (!description && description !== false) {
- description = pkg.description;
- }
-
- help = (description ? `\n ${description}\n` : '') + (help ? `\n${help}\n` : '\n');
-
- const showHelp = code => {
- console.log(help);
- process.exit(typeof code === 'number' ? code : 2);
- };
-
- const showVersion = () => {
- console.log(typeof opts.version === 'string' ? opts.version : pkg.version);
- process.exit();
- };
-
- if (argv.version && opts.autoVersion) {
- showVersion();
- }
-
- if (argv.help && opts.autoHelp) {
- showHelp(0);
- }
-
- const input = argv._;
- delete argv._;
-
- const flags = camelcaseKeys(argv, {exclude: ['--', /^\w$/]});
-
- return {
- input,
- flags,
- pkg,
- help,
- showHelp,
- showVersion
- };
- };
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