build refactor

build/script.js

@@ -0,0 +1,46 @@
+/* eslint-env es6 */
+/* eslint-disable no-console */
+/* global require */
+/* global console */
+
+const fs = require('fs');
+const path = require('path');
+const process = require('process');
+const concat = require('concat');
+const uglifyJs = require('uglify-js');
+
+const key = process.argv[2];
+const output = process.argv[3];
+const production = process.argv.indexOf('--production') !== -1;
+
+const allFiles = JSON.parse(fs.readFileSync('scripts.json', 'utf8'));
+const files = allFiles[key];
+
+console.log('concatenating', files);
+
+concat(files, output).then((concatenated) => {
+	if (production) {
+		console.log('minifying', output);
+
+		const minifyOutput = uglifyJs.minify(
+			concatenated,
+			{
+				compress: {
+					drop_console: true,
+				},
+				output: {
+					beautify: false,
+					wrap_iife: true,
+				},
+				sourceMap: {
+					filename: path.basename(output),
+					url: path.basename(output) + '.map',
+				},
+			}
+		);
+
+		fs.writeFileSync(output, minifyOutput.code);
+		fs.writeFileSync(output + '.map', minifyOutput.map);
+	}
+});
+