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