Added update check (closes #9)

CHANGELOG.MD

@@ -1,5 +1,8 @@
+* 0.1.4
+  * added a update check: you will be notified whenever a new version of the generator is available
+    * you can disable the update check by passing the following flag: `--no-update-notifier`
 * 0.1.3
-  * now uses modernWebDevBuild 0.2.2
+  * now uses modernWebDevBuild 0.2.x
   * disabled HTML minification by default (not supported by Angular 2 anymore: https://github.com/dsebastien/modernWebDevBuild/issues/67)
   * fixed RxJS dependency in the JSPM configuration (fixes #46)
 * 0.1.2

README.md

@@ -107,6 +107,8 @@ You can list all the options with a brief description using `yo modern-web-dev -
 
 By default, the generator will install all project dependencies (not the global requirements listed in the 'Usage' section!). You can skip the installation of the project dependencies by passing the `--skip-install` option.
 
+The generator will check for updates once in a while but you can disable the update check by passing the following flag: `--no-update-notifier`.
+
 ## Generated projects dev dependencies
 * [gulp](http://gulpjs.com/): JavaScript task runner
 * [babel](https://babeljs.io/): ES2015 to ES5 transpiler. Needed so that the Gulp configuration file can be written using ES2015 (gulpfile.babel.js)

app/index.es2015.js

@@ -1,10 +1,12 @@
 "use strict";
 
-const packageJSON = require('../package.json');
+const packageJSON = require("../package.json");
 
 import yeoman from "yeoman-generator";
 import yosay  from "yosay";
 import chalk from "chalk";
+import updateNotifier from "update-notifier";
+import stringLength from "string-length";
 
 const descriptors = {
 	projectName: {
@@ -57,6 +59,24 @@ const descriptors = {
 	}
 };
 
+function checkForUpdates() {
+	const notifier = updateNotifier({
+		pkg: packageJSON
+		//,updateCheckInterval: 1 // useful for debugging
+	});
+
+	let message = [];
+
+	let retVal;
+
+	if (notifier.update) {
+		message.push("Update available: " + chalk.green.bold(notifier.update.latest) + chalk.gray(" (current: " + notifier.update.current + ")"));
+		message.push("Run " + chalk.magenta("npm install -g " + packageJSON.name) + " to update.");
+		retVal = yosay(message.join(" "), {maxLength: stringLength(message[0])});
+	}
+	return retVal;
+}
+
 let modernWebDevGenerator = yeoman.Base.extend({
 
 	constructor: function () {
@@ -109,10 +129,17 @@ let modernWebDevGenerator = yeoman.Base.extend({
 	// contexts list: http://yeoman.io/authoring/running-context.html
 	prompting: function () {
 		let done = this.async();
+
+		const welcomeMessage = yosay("Welcome to the " + chalk.green("ModernWebDev") + " Yeoman Generator (v" + packageJSON.version + ")");
+		const updateMessage = checkForUpdates();
 
-		// Have Yeoman greet the user.
-		this.log(yosay("Welcome to the " + chalk.green("ModernWebDev") + " Yeoman Generator (v" + packageJSON.version + ")"));
-
+		// Have Yeoman greet the user
+		if(updateMessage){
+			this.log(updateMessage);
+		}else{
+			this.log(welcomeMessage);
+		}
+
 		const prompts = [
 			{
 				type: "input",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "generator-modern-web-dev",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "Modern Web Development Yeoman Generator: Gulp, ES2015, TypeScript, Angular 2, SASS, Minification, Bundling, Sourcemaps, ...",
   "author": {
     "name": "Sebastien Dubois",
@@ -40,7 +40,9 @@
     "yeoman-generator": "0.22.x",
     "yosay": "1.1.x",
     "chalk": "1.1.x",
-    "babel-runtime": "6.3.x"
+    "babel-runtime": "6.3.x",
+    "update-notifier": "0.6.x",
+    "string-length": "1.0.x"
   },
   "devDependencies": {
     "yeoman-assert": "2.1.x",