133 lines
3.1 KiB
Plaintext
133 lines
3.1 KiB
Plaintext
'use strict';
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const path = require('path');
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const buildParserOptions = require('minimist-options');
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const yargs = require('yargs-parser');
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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 hardRejection = require('hard-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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const meow = (helpText, options) => {
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if (typeof helpText !== 'string') {
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options = helpText;
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helpText = '';
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}
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options = {
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pkg: readPkgUp.sync({
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cwd: parentDir,
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normalize: false
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}).packageJson || {},
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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: helpText,
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autoHelp: true,
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autoVersion: true,
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booleanDefault: false,
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hardRejection: true,
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...options
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};
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if (options.hardRejection) {
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hardRejection();
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}
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const parserFlags = options.flags && typeof options.booleanDefault !== 'undefined' ? Object.keys(options.flags).reduce(
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(flags, flag) => {
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if (flags[flag].type === 'boolean' && !Object.prototype.hasOwnProperty.call(flags[flag], 'default')) {
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flags[flag].default = options.booleanDefault;
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}
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return flags;
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},
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options.flags
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) : options.flags;
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let parserOptions = {
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arguments: options.input,
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...parserFlags
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};
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parserOptions = decamelizeKeys(parserOptions, '-', {exclude: ['stopEarly', '--']});
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if (options.inferType) {
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delete parserOptions.arguments;
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}
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parserOptions = buildParserOptions(parserOptions);
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if (parserOptions['--']) {
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parserOptions.configuration = {
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...parserOptions.configuration,
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'populate--': true
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};
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}
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const {pkg} = options;
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const argv = yargs(options.argv, parserOptions);
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let help = redent(trimNewlines((options.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} = options;
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if (!description && description !== false) {
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({description} = pkg);
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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 options.version === 'string' ? options.version : pkg.version);
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process.exit();
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};
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if (argv._.length === 0 && options.argv.length === 1) {
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if (argv.version === true && options.autoVersion) {
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showVersion();
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}
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if (argv.help === true && options.autoHelp) {
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showHelp(0);
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}
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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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const unnormalizedFlags = {...flags};
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if (options.flags !== undefined) {
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for (const flagValue of Object.values(options.flags)) {
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delete flags[flagValue.alias];
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}
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}
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return {
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input,
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flags,
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unnormalizedFlags,
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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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module.exports = meow;
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