Add webpack hot module reloading for development

Co-Authored-By: Tim Miller-Williams <timmw@users.noreply.github.com>

README.md

@@ -112,4 +112,4 @@ Before submitting any change, make sure to:
 - Read the [Contributing instructions](https://github.com/thelounge/thelounge/blob/master/.github/CONTRIBUTING.md#contributing)
 - Run `yarn test` to execute linters and test suite
 - Run `yarn build` if you change or add anything in `client/js` or `client/views`
-- `yarn dev` can be used to start The Lounge and watch for any file changes in the client folder
+- `yarn dev` can be used to start The Lounge with hot module reloading

package.json

@@ -14,7 +14,7 @@
   "scripts": {
     "build": "webpack",
     "coverage": "run-s test:{client,server} && nyc --nycrc-path=test/.nycrc-report.json report",
-    "dev": "run-p watch start",
+    "dev": "node index start --dev",
     "format:prettier": "prettier --write \"**/*.*\"",
     "lint:check-eslint": "eslint --print-config .eslintrc.yml | eslint-config-prettier-check",
     "lint:eslint": "eslint . --ext .js,.vue --report-unused-disable-directives --color",
@@ -122,7 +122,9 @@
     "vue-template-compiler": "2.6.10",
     "vuedraggable": "2.23.2",
     "webpack": "4.41.2",
-    "webpack-cli": "3.3.10"
+    "webpack-cli": "3.3.10",
+    "webpack-dev-middleware": "3.7.2",
+    "webpack-hot-middleware": "2.25.0"
   },
   "husky": {
     "hooks": {

src/command-line/start.js

@@ -12,12 +12,13 @@ const Utils = require("./utils");
 program
 	.command("start")
 	.description("Start the server")
+	.option("--dev", "Development mode with hot module reloading")
 	.on("--help", Utils.extraHelp)
-	.action(function() {
+	.action(function(options) {
 		initalizeConfig();
 
 		const server = require("../server");
-		server();
+		server(options);
 	});
 
 function initalizeConfig() {

src/plugins/dev-server.js

@@ -0,0 +1,28 @@
+"use strict";
+
+module.exports = (app) => {
+	const log = require("../log");
+
+	log.debug("Starting server in development mode");
+
+	const webpack = require("webpack");
+	const webpackConfig = require("../../webpack.config.js");
+
+	webpackConfig.plugins.push(new webpack.HotModuleReplacementPlugin());
+	webpackConfig.entry["js/bundle.js"].push(
+		"webpack-hot-middleware/client?path=storage/__webpack_hmr"
+	);
+
+	const compiler = webpack(webpackConfig);
+
+	app.use(
+		require("webpack-dev-middleware")(compiler, {
+			index: "/",
+			publicPath: webpackConfig.output.publicPath,
+		})
+	).use(
+		require("webpack-hot-middleware")(compiler, {
+			path: "/storage/__webpack_hmr",
+		})
+	);
+};

src/server.js

@@ -32,7 +32,7 @@ const serverHash = Math.floor(Date.now() * Math.random());
 
 let manager = null;
 
-module.exports = function() {
+module.exports = function(options = {}) {
 	log.info(`The Lounge ${colors.green(Helper.getVersion())} \
 (Node.js ${colors.green(process.versions.node)} on ${colors.green(process.platform)} ${
 		process.arch
@@ -44,8 +44,13 @@ module.exports = function() {
 		maxAge: 86400 * 1000,
 	};
 
-	const app = express()
-		.set("env", "production")
+	const app = express();
+
+	if (options.dev) {
+		require("./plugins/dev-server.js")(app);
+	}
+
+	app.set("env", "production")
 		.disable("x-powered-by")
 		.use(allRequests)
 		.get("/", indexRequest)

webpack.config.js

@@ -10,7 +10,7 @@ const Helper = require("./src/helper.js");
 const config = {
 	mode: process.env.NODE_ENV === "production" ? "production" : "development",
 	entry: {
-		"js/bundle.js": path.resolve(__dirname, "client/js/lounge.js"),
+		"js/bundle.js": [path.resolve(__dirname, "client/js/lounge.js")],
 		"css/style": path.resolve(__dirname, "client/css/style.css"),
 	},
 	devtool: "source-map",

yarn.lock

@@ -1051,6 +1051,11 @@ ansi-escapes@^4.2.1:
   dependencies:
     type-fest "^0.5.2"
 
+ansi-html@0.0.7:
+  version "0.0.7"
+  resolved "https://registry.yarnpkg.com/ansi-html/-/ansi-html-0.0.7.tgz#813584021962a9e9e6fd039f940d12f56ca7859e"
+  integrity sha1-gTWEAhliqenm/QOflA0S9WynhZ4=
+
 ansi-regex@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-2.1.1.tgz#c3b33ab5ee360d86e0e628f0468ae7ef27d654df"
@@ -4038,6 +4043,11 @@ html-comment-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/html-comment-regex/-/html-comment-regex-1.1.2.tgz#97d4688aeb5c81886a364faa0cad1dda14d433a7"
   integrity sha512-P+M65QY2JQ5Y0G9KKdlDpo0zK+/OHptU5AaBwUfAIDJZk1MYf32Frm84EcOytfJE0t5JvkAnKlmjsXDnWzCJmQ==
 
+html-entities@^1.2.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/html-entities/-/html-entities-1.2.1.tgz#0df29351f0721163515dfb9e5543e5f6eed5162f"
+  integrity sha1-DfKTUfByEWNRXfueVUPl9u7VFi8=
+
 html-minifier-loader@1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/html-minifier-loader/-/html-minifier-loader-1.4.1.tgz#65f05e2a5f91f6b0713cc2081ae4ebe4bfc0d696"
@@ -5397,6 +5407,11 @@ mime@1.6.0:
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
   integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
 
+mime@^2.4.4:
+  version "2.4.4"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.4.tgz#bd7b91135fc6b01cde3e9bae33d659b63d8857e5"
+  integrity sha512-LRxmNwziLPT828z+4YkNzloCFC2YM4wrB99k+AV5ZbEyfGNWfG8SO1FUXLmLDBSo89NrJZ4DIWeLjy1CHGhMGA==
+
 mimic-fn@^2.0.0, mimic-fn@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
@@ -7314,7 +7329,7 @@ querystring-es3@^0.2.0:
   resolved "https://registry.yarnpkg.com/querystring-es3/-/querystring-es3-0.2.1.tgz#9ec61f79049875707d69414596fd907a4d711e73"
   integrity sha1-nsYfeQSYdXB9aUFFlv2Qek1xHnM=
 
-querystring@0.2.0:
+querystring@0.2.0, querystring@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
   integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
@@ -7339,7 +7354,7 @@ randomfill@^1.0.3:
     randombytes "^2.0.5"
     safe-buffer "^5.1.0"
 
-range-parser@~1.2.1:
+range-parser@^1.2.1, range-parser@~1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
   integrity sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==
@@ -9286,6 +9301,27 @@ webpack-cli@3.3.10:
     v8-compile-cache "2.0.3"
     yargs "13.2.4"
 
+webpack-dev-middleware@3.7.2:
+  version "3.7.2"
+  resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.2.tgz#0019c3db716e3fa5cecbf64f2ab88a74bab331f3"
+  integrity sha512-1xC42LxbYoqLNAhV6YzTYacicgMZQTqRd27Sim9wn5hJrX3I5nxYy1SxSd4+gjUFsz1dQFj+yEe6zEVmSkeJjw==
+  dependencies:
+    memory-fs "^0.4.1"
+    mime "^2.4.4"
+    mkdirp "^0.5.1"
+    range-parser "^1.2.1"
+    webpack-log "^2.0.0"
+
+webpack-hot-middleware@2.25.0:
+  version "2.25.0"
+  resolved "https://registry.yarnpkg.com/webpack-hot-middleware/-/webpack-hot-middleware-2.25.0.tgz#4528a0a63ec37f8f8ef565cf9e534d57d09fe706"
+  integrity sha512-xs5dPOrGPCzuRXNi8F6rwhawWvQQkeli5Ro48PRuQh8pYPCPmNnltP9itiUPT4xI8oW+y0m59lyyeQk54s5VgA==
+  dependencies:
+    ansi-html "0.0.7"
+    html-entities "^1.2.0"
+    querystring "^0.2.0"
+    strip-ansi "^3.0.0"
+
 webpack-log@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/webpack-log/-/webpack-log-2.0.0.tgz#5b7928e0637593f119d32f6227c1e0ac31e1b47f"