Added --version flag (fixes #60) (#61)

package.json

@@ -3,6 +3,9 @@
 	"version": "0.1.0",
 	"description": "Reimplementation of MetaCall FaaS platform written in TypeScript.",
 	"main": "dist/index.js",
+	"bin": {
+		"metacall-faas": "dist/index.js"
+	},
 	"scripts": {
 		"test": "npm run build && mocha dist/test",
 		"prepublishOnly": "npm run build",
@@ -100,7 +103,6 @@
 					"@typescript-eslint/no-unsafe-call": "off",
 					"@typescript-eslint/no-var-requires": "off",
 					"@typescript-eslint/no-unsafe-return": "off"
-
 				}
 			}
 		]

src/index.ts

@@ -1,14 +1,21 @@
+#!/usr/bin/env node
+
 import colors from 'colors';
 import dotenv from 'dotenv';
-
 import { initializeAPI } from './api';
 import { autoDeployApps } from './utils/autoDeploy';
 import { appsDirectory } from './utils/config';
 import { ensureFolderExists } from './utils/filesystem';
+import { printVersionAndExit } from './utils/version';
 
 // Initialize the FaaS
 void (async (): Promise<void> => {
 	try {
+		const args = process.argv.slice(2);
+		if (args.includes('--version')) {
+			printVersionAndExit();
+		}
+
 		dotenv.config();
 		colors.enable();
 

src/utils/version.ts

@@ -0,0 +1,11 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+
+export function printVersionAndExit(): void {
+	const packageJsonPath = join(__dirname, '../../package.json');
+	const packageJson = JSON.parse(readFileSync(packageJsonPath, 'utf8')) as {
+		version: string;
+	};
+	console.log(`FaaS version: ${packageJson.version}`);
+	process.exit(0);
+}