Allow users to serve via HTTP for development

Author: moonglum

lib/cli.js

@@ -21,6 +21,10 @@ Options:
     generate source maps (where supported)
   --compact
     reduce output size (where supported)
+  --serve [HOST:]PORT
+    serve generated files via HTTP
+  --liveserve [HOST:]PORT
+    serve generated files via HTTP with live reload
 `.trim();
 
 module.exports = function parseCLI(argv = process.argv.slice(2), help = HELP) {
@@ -41,7 +45,9 @@ module.exports = function parseCLI(argv = process.argv.slice(2), help = HELP) {
 		watch: argv.watch,
 		fingerprint: argv.fingerprint,
 		sourcemaps: argv.sourcemaps,
-		compact: argv.compact
+		compact: argv.compact,
+		serve: argv.serve,
+		liveserve: argv.liveserve
 	};
 
 	if(options.watch && options.fingerprint) { // for convenience

lib/index.js

@@ -1,10 +1,11 @@
 "use strict";
 
+let server = require("./server");
 let AssetManager = require("./manager");
 let resolvePath = require("./util/resolve");
 let { loadExtension, abort, repr } = require("./util");
-let browserslist = require("browserslist");
 let SerializedRunner = require("./util/runner");
+let browserslist = require("browserslist");
 
 let DEFAULTS = {
 	// maps config identifiers to corresponding import identifiers and buckets
@@ -24,7 +25,8 @@ let DEFAULTS = {
 	}
 };
 
-module.exports = (referenceDir, config, { watch, fingerprint, sourcemaps, compact }) => {
+module.exports = (referenceDir, config,
+		{ watch, fingerprint, sourcemaps, compact, serve, liveserve }) => {
 	let assetManager = new AssetManager(referenceDir, {
 		manifestConfig: config.manifest,
 		fingerprint,
@@ -67,6 +69,15 @@ module.exports = (referenceDir, config, { watch, fingerprint, sourcemaps, compac
 				runner.rerun(filepaths);
 			});
 	}
+
+	if(serve && liveserve) {
+		abort("ERROR: serve and liveserve must not be used together");
+	}
+	if(serve) {
+		server.static(serve, assetManager.manifest.webRoot);
+	} else if(liveserve) {
+		server.live(liveserve, assetManager.manifest.webRoot);
+	}
 };
 
 function buildStep(plugins) {

lib/server.js

@@ -0,0 +1,27 @@
+let { loadExtension, repr } = require("./util");
+
+let CONFIG_FORMAT = /([\d.]+:)?(\d+)/;
+
+exports.static = function(config, webroot) {
+	let donny = loadExtension("donny", "failed to activate server");
+	let [host, port] = parse(config);
+
+	donny({ port, bind: host, webroot }).
+		then(() => {
+			console.error(`serving ${repr(webroot)} at http://${host}:${port}`);
+		});
+};
+
+exports.live = function(config, root) {
+	let liveServer = loadExtension("live-server", "failed to activate live-server");
+	let [host, port] = parse(config);
+
+	liveServer.start({ port, host, root, open: false });
+};
+
+function parse(config) {
+	// eslint-disable-next-line no-unused-vars
+	let [_, host, port] = CONFIG_FORMAT.exec(config);
+	host = host ? host.slice(0, -1) : "0.0.0.0";
+	return [host, port];
+}