81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
* Wrapper on-top of `optimist` in order to properly support boolean flags
|
|
* and have a slightly less awkward API.
|
|
*
|
|
* Usage example:
|
|
* var argv = parseCommandLine([{
|
|
* command: 'web',
|
|
* description: 'Run in a web browser instead of iOS',
|
|
* default: true
|
|
* }])
|
|
*
|
|
* NOTE: This file is used internally at Facebook and not in `local-cli` itself.
|
|
* No changes should be made to this file without prior discussion with FB team.
|
|
*/
|
|
'use strict';
|
|
|
|
var optimistModule = require('optimist');
|
|
|
|
function parseCommandLine(config, args) {
|
|
var optimist = new optimistModule();
|
|
args = args || process.argv;
|
|
// optimist default API requires you to write the command name three time
|
|
// This is a small wrapper to accept an object instead
|
|
for (var i = 0; i < config.length; ++i) {
|
|
if (config[i].type === 'string') {
|
|
optimist.string(config[i].command);
|
|
} else {
|
|
optimist.boolean(config[i].command);
|
|
}
|
|
|
|
optimist
|
|
.default(config[i].command, config[i].default)
|
|
.describe(config[i].command, config[i].description);
|
|
|
|
if (config[i].required) {
|
|
optimist.demand(config[i].command);
|
|
}
|
|
}
|
|
var argv = optimist.parse(args);
|
|
|
|
// optimist doesn't have support for --dev=false, instead it returns 'false'
|
|
for (var i = 0; i < config.length; ++i) {
|
|
var command = config[i].command;
|
|
if (argv[command] === undefined) {
|
|
argv[command] = config[i].default;
|
|
}
|
|
if (argv[command] === 'true') {
|
|
argv[command] = true;
|
|
}
|
|
if (argv[command] === 'false') {
|
|
argv[command] = false;
|
|
}
|
|
if (config[i].type === 'string') {
|
|
// According to https://github.com/substack/node-optimist#numbers,
|
|
// every argument that looks like a number should be converted to one.
|
|
var strValue = argv[command];
|
|
var numValue = strValue ? Number(strValue) : undefined;
|
|
if (typeof numValue === 'number' && !isNaN(numValue)) {
|
|
argv[command] = numValue;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Show --help
|
|
if (argv.help || argv.h) {
|
|
optimist.showHelp();
|
|
process.exit();
|
|
}
|
|
|
|
return argv;
|
|
}
|
|
|
|
module.exports = parseCommandLine;
|