feat: generalize examples

examples/loadConfig.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const safeLoadJson = (file) => {
+	if (!file)
+		return {};
+
+	try {
+		return JSON.parse(fs.readFileSync(file));
+	} catch (e) {
+		console.warn(`Couldn't load ${file} config file.`);
+		return {};
+	}
+}
+
+const getDefaultEnv = () => {
+	const [,,parArg] = process.argv;
+	return parArg || process.env.NODE_ENV;
+}
+
+const loadConfig = (configDirectory = path.join(__dirname, './config'), env = getDefaultEnv()) => {
+	console.log(`Loading config form ${configDirectory} with env set to ${env}.`);
+
+	const baseConfigFile = path.join(configDirectory, 'config.json');
+	const envConfigFile = env ? path.join(configDirectory, `config.${env}.json`) : null;
+
+	return {
+		...safeLoadJson(baseConfigFile),
+		...safeLoadJson(envConfigFile),
+	}
+}
+
+module.exports = loadConfig();