Install babel dependencies according to babelrc

install_babel_deps.js

#!/usr/bin/env node

//https://gist.github.com/hangxingliu/0b9604ef8ea5e11df36d8919613609be

let fs = require('fs'),
	fatal = msg => console.error(`\n  error: ${msg}\n`) + process.exit(1);

let babelrcPath = process.argv[2] || '.babelrc';

fs.existsSync(babelrcPath) || (
	process.argv[2] ? fatal(`babelrc file is not existed!`)
		: fatal(`Please passing babelrc file path paramter`));

let json = JSON.parse(fs.readFileSync(babelrcPath)),
	installList = ['i', `babel-core`];

json.presets.map(preset => Array.isArray(preset) ? preset[0] : preset)
	.map(preset => installList.push(`babel-preset-${preset}`));

json.plugins.map(plugin => Array.isArray(plugin) ? plugin[0] : plugin)
	.map(plugin => installList.push(`babel-plugin-${plugin}`));

console.log('\n# please executing: \n');
console.log(' npm ' + installList.join(' \\\n  ') + '\n');