-> v0.13.3

Emit basepath event

CHANGELOG.md

@@ -1,5 +1,37 @@
 # sapper changelog
 
+## 0.13.3
+
+* Make `fatal` events clonable for IPC purposes
+
+## 0.13.2
+
+* Emit a `basepath` event ([#284](https://github.com/sveltejs/sapper/pull/284))
+
+## 0.13.1
+
+* Reinstate ten-second interval between dev server heartbeats ([#276](https://github.com/sveltejs/sapper/issues/276))
+
+## 0.13.0
+
+* Expose `dev`, `build`, `export` and `find_page` APIs ([#272](https://github.com/sveltejs/sapper/issues/272))
+
+## 0.12.0
+
+* Each app has a single `<App>` component. See the [migration guide](https://sapper.svelte.technology/guide#0-11-to-0-12) for more information ([#157](https://github.com/sveltejs/sapper/issues/157))
+* Process exits with error code 1 if build/export fails ([#208](https://github.com/sveltejs/sapper/issues/208))
+
+## 0.11.1
+
+* Limit routes with leading dots to `.well-known` URIs ([#252](https://github.com/sveltejs/sapper/issues/252))
+* Allow server routes to sit in front of pages ([#236](https://github.com/sveltejs/sapper/pull/236))
+
+## 0.11.0
+
+* Create launcher file ([#240](https://github.com/sveltejs/sapper/issues/240))
+* Only keep necessary parts of webpack stats ([#251](https://github.com/sveltejs/sapper/pull/251))
+* Allow `NODE_ENV` to be overridden when building ([#241](https://github.com/sveltejs/sapper/issues/241))
+
 ## 0.10.7
 
 * Allow routes to have a leading `.` ([#243](https://github.com/sveltejs/sapper/pull/243))

api.js

@@ -0,0 +1 @@
+module.exports = require('./dist/api.ts.js');

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sapper",
-  "version": "0.10.7",
+  "version": "0.13.3",
   "description": "Military-grade apps, engineered by Svelte",
   "main": "dist/middleware.ts.js",
   "bin": {
@@ -18,53 +18,50 @@
     "test": "test"
   },
   "dependencies": {
+    "ansi-colors": "^2.0.1",
     "cheerio": "^1.0.0-rc.2",
     "chokidar": "^2.0.3",
-    "clorox": "^1.0.3",
     "cookie": "^0.3.1",
     "devalue": "^1.0.1",
     "glob": "^7.1.2",
-    "html-minifier": "^3.5.11",
+    "html-minifier": "^3.5.16",
     "mkdirp": "^0.5.1",
     "node-fetch": "^2.1.1",
     "port-authority": "^1.0.2",
-    "pretty-bytes": "^4.0.2",
+    "pretty-bytes": "^5.0.0",
     "pretty-ms": "^3.1.0",
     "require-relative": "^0.8.7",
     "rimraf": "^2.6.2",
-    "sade": "^1.4.0",
+    "sade": "^1.4.1",
     "sander": "^0.6.0",
-    "source-map-support": "^0.5.4",
-    "tslib": "^1.9.0",
+    "source-map-support": "^0.5.6",
+    "tslib": "^1.9.1",
     "url-parse": "^1.2.0",
-    "webpack-format-messages": "^1.0.2"
+    "webpack-format-messages": "^2.0.1"
   },
   "devDependencies": {
-    "@std/esm": "^0.25.3",
     "@types/glob": "^5.0.34",
     "@types/mkdirp": "^0.5.2",
     "@types/rimraf": "^2.0.2",
     "compression": "^1.7.1",
     "eslint": "^4.13.1",
-    "eslint-plugin-import": "^2.8.0",
+    "eslint-plugin-import": "^2.12.0",
     "express": "^4.16.3",
-    "get-port": "^3.2.0",
-    "mocha": "^5.0.4",
+    "mocha": "^5.2.0",
     "nightmare": "^3.0.0",
-    "npm-run-all": "^4.1.2",
-    "polka": "^0.3.4",
-    "rollup": "^0.57.0",
-    "rollup-plugin-commonjs": "^9.1.0",
-    "rollup-plugin-json": "^2.3.0",
+    "npm-run-all": "^4.1.3",
+    "polka": "^0.4.0",
+    "rollup": "^0.59.2",
+    "rollup-plugin-commonjs": "^9.1.3",
+    "rollup-plugin-json": "^3.0.0",
     "rollup-plugin-string": "^2.0.2",
     "rollup-plugin-typescript": "^0.8.1",
     "serve-static": "^1.13.2",
-    "svelte": "^1.57.4",
-    "svelte-loader": "^2.5.1",
-    "ts-node": "^5.0.1",
-    "typescript": "^2.6.2",
+    "svelte": "^2.6.3",
+    "svelte-loader": "^2.9.0",
+    "typescript": "^2.8.3",
     "walk-sync": "^0.3.2",
-    "webpack": "^4.1.0"
+    "webpack": "^4.8.3"
   },
   "scripts": {
     "cy:open": "cypress open",

rollup.config.js

@@ -25,7 +25,13 @@ export default [
 	},
 
 	{
-		input: [`src/cli.ts`, `src/core.ts`, `src/middleware.ts`, `src/webpack.ts`],
+		input: [
+			`src/api.ts`,
+			`src/cli.ts`,
+			`src/core.ts`,
+			`src/middleware.ts`,
+			`src/webpack.ts`
+		],
 		output: {
 			dir: 'dist',
 			format: 'cjs',

src/api.ts

@@ -0,0 +1,6 @@
+import { dev } from './api/dev';
+import { build } from './api/build';
+import { exporter } from './api/export';
+import { find_page } from './api/find_page';
+
+export { dev, build, exporter, find_page };

src/api/build.ts

@@ -0,0 +1,111 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import mkdirp from 'mkdirp';
+import rimraf from 'rimraf';
+import { EventEmitter } from 'events';
+import { minify_html } from './utils/minify_html';
+import { create_compilers, create_main_manifests, create_routes, create_serviceworker_manifest } from '../core'
+import { locations } from '../config';
+import * as events from './interfaces';
+
+export function build(opts: {}) {
+	const emitter = new EventEmitter();
+
+	execute(emitter, opts).then(
+		() => {
+			emitter.emit('done', <events.DoneEvent>{}); // TODO do we need to pass back any info?
+		},
+		error => {
+			emitter.emit('error', <events.ErrorEvent>{
+				error
+			});
+		}
+	);
+
+	return emitter;
+}
+
+async function execute(emitter: EventEmitter, {
+	dest = 'build',
+	app = 'app',
+	webpack = 'webpack',
+	routes = 'routes'
+} = {}) {
+	mkdirp.sync(dest);
+	rimraf.sync(path.join(dest, '**/*'));
+
+	// minify app/template.html
+	// TODO compile this to a function? could be quicker than str.replace(...).replace(...).replace(...)
+	const template = fs.readFileSync(`${app}/template.html`, 'utf-8');
+
+	// remove this in a future version
+	if (template.indexOf('%sapper.base%') === -1) {
+		const error = new Error(`As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`);
+		error.code = `missing-sapper-base`;
+		throw error;
+	}
+
+	fs.writeFileSync(`${dest}/template.html`, minify_html(template));
+
+	const route_objects = create_routes();
+
+	// create app/manifest/client.js and app/manifest/server.js
+	create_main_manifests({ routes: route_objects });
+
+	const { client, server, serviceworker } = create_compilers({ webpack });
+
+	const client_stats = await compile(client);
+	emitter.emit('build', <events.BuildEvent>{
+		type: 'client',
+		// TODO duration/warnings
+		webpack_stats: client_stats
+	});
+
+	const client_info = client_stats.toJson();
+	fs.writeFileSync(path.join(dest, 'client_info.json'), JSON.stringify(client_info));
+	fs.writeFileSync(path.join(dest, 'client_assets.json'), JSON.stringify(client_info.assetsByChunkName));
+
+	const server_stats = await compile(server);
+	emitter.emit('build', <events.BuildEvent>{
+		type: 'server',
+		// TODO duration/warnings
+		webpack_stats: server_stats
+	});
+
+	let serviceworker_stats;
+
+	if (serviceworker) {
+		create_serviceworker_manifest({
+			routes: route_objects,
+			client_files: client_stats.toJson().assets.map((chunk: { name: string }) => `client/${chunk.name}`)
+		});
+
+		serviceworker_stats = await compile(serviceworker);
+
+		emitter.emit('build', <events.BuildEvent>{
+			type: 'serviceworker',
+			// TODO duration/warnings
+			webpack_stats: serviceworker_stats
+		});
+	}
+}
+
+function compile(compiler: any) {
+	return new Promise((fulfil, reject) => {
+		compiler.run((err: Error, stats: any) => {
+			if (err) {
+				reject(err);
+				process.exit(1);
+			}
+
+			if (stats.hasErrors()) {
+				console.error(stats.toString({ colors: true }));
+				reject(new Error(`Encountered errors while building app`));
+			}
+
+			else {
+				fulfil(stats);
+			}
+		});
+	});
+}

src/api/dev.ts

@@ -0,0 +1,433 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import * as http from 'http';
+import * as child_process from 'child_process';
+import * as ports from 'port-authority';
+import mkdirp from 'mkdirp';
+import rimraf from 'rimraf';
+import format_messages from 'webpack-format-messages';
+import { locations } from '../config';
+import { EventEmitter } from 'events';
+import { create_routes, create_main_manifests, create_compilers, create_serviceworker_manifest } from '../core';
+import * as events from './interfaces';
+
+export function dev(opts) {
+	return new Watcher(opts);
+}
+
+class Watcher extends EventEmitter {
+	dirs: {
+		app: string;
+		dest: string;
+		routes: string;
+		webpack: string;
+	}
+	port: number;
+	closed: boolean;
+
+	dev_server: DevServer;
+	proc: child_process.ChildProcess;
+	filewatchers: Array<{ close: () => void }>;
+	deferreds: {
+		client: Deferred;
+		server: Deferred;
+	};
+
+	restarting: boolean;
+	current_build: {
+		changed: Set<string>;
+		rebuilding: Set<string>;
+		unique_warnings: Set<string>;
+		unique_errors: Set<string>;
+	}
+
+	constructor({
+		app = locations.app(),
+		dest = locations.dest(),
+		routes = locations.routes(),
+		webpack = 'webpack',
+		port = +process.env.PORT
+	}: {
+		app: string,
+		dest: string,
+		routes: string,
+		webpack: string,
+		port: number
+	}) {
+		super();
+
+		this.dirs = { app, dest, routes, webpack };
+		this.port = port;
+		this.closed = false;
+
+		this.filewatchers = [];
+
+		this.current_build = {
+			changed: new Set(),
+			rebuilding: new Set(),
+			unique_errors: new Set(),
+			unique_warnings: new Set()
+		};
+
+		// remove this in a future version
+		const template = fs.readFileSync(path.join(app, 'template.html'), 'utf-8');
+		if (template.indexOf('%sapper.base%') === -1) {
+			const error = new Error(`As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`);
+			error.code = `missing-sapper-base`;
+			throw error;
+		}
+
+		process.env.NODE_ENV = 'development';
+
+		process.on('exit', () => {
+			this.close();
+		});
+
+		this.init();
+	}
+
+	async init() {
+		if (this.port) {
+			if (!await ports.check(this.port)) {
+				this.emit('fatal', <events.FatalEvent>{
+					message: `Port ${this.port} is unavailable`
+				});
+				return;
+			}
+		} else {
+			this.port = await ports.find(3000);
+		}
+
+		const { dest } = this.dirs;
+		rimraf.sync(dest);
+		mkdirp.sync(dest);
+
+		const dev_port = await ports.find(10000);
+
+		const routes = create_routes();
+		create_main_manifests({ routes, dev_port });
+
+		this.dev_server = new DevServer(dev_port);
+
+		this.filewatchers.push(
+			watch_files(locations.routes(), ['add', 'unlink'], () => {
+				const routes = create_routes();
+				create_main_manifests({ routes, dev_port });
+			}),
+
+			watch_files(`${locations.app()}/template.html`, ['change'], () => {
+				this.dev_server.send({
+					action: 'reload'
+				});
+			})
+		);
+
+		this.deferreds = {
+			server: new Deferred(),
+			client: new Deferred()
+		};
+
+		// TODO watch the configs themselves?
+		const compilers = create_compilers({ webpack: this.dirs.webpack });
+
+		this.watch(compilers.server, {
+			name: 'server',
+
+			invalid: filename => {
+				this.restart(filename, 'server');
+				this.deferreds.server = new Deferred();
+			},
+
+			result: info => {
+				fs.writeFileSync(path.join(dest, 'server_info.json'), JSON.stringify(info, null, '  '));
+
+				this.deferreds.client.promise.then(() => {
+					this.dev_server.send({
+						status: 'completed'
+					});
+
+					const restart = () => {
+						ports.wait(this.port).then((() => {
+							this.emit('ready', <events.ReadyEvent>{
+								port: this.port,
+								process: this.proc
+							});
+
+							this.deferreds.server.fulfil();
+						}));
+					};
+
+					if (this.proc) {
+						this.proc.kill();
+						this.proc.on('exit', restart);
+					} else {
+						restart();
+					}
+
+					this.proc = child_process.fork(`${dest}/server.js`, [], {
+						cwd: process.cwd(),
+						env: Object.assign({
+							PORT: this.port
+						}, process.env),
+						stdio: ['ipc']
+					});
+
+					this.proc.on('message', message => {
+						if (message.__sapper__ && message.event === 'basepath') {
+							this.emit('basepath', {
+								basepath: message.basepath
+							});
+						}
+					});
+				});
+			}
+		});
+
+		let first = true;
+
+		this.watch(compilers.client, {
+			name: 'client',
+
+			invalid: filename => {
+				this.restart(filename, 'client');
+				this.deferreds.client = new Deferred();
+
+				// TODO we should delete old assets. due to a webpack bug
+				// i don't even begin to comprehend, this is apparently
+				// quite difficult
+			},
+
+			result: info => {
+				fs.writeFileSync(path.join(dest, 'client_info.json'), JSON.stringify(info));
+				fs.writeFileSync(path.join(dest, 'client_assets.json'), JSON.stringify(info.assetsByChunkName, null, '  '));
+				this.deferreds.client.fulfil();
+
+				const client_files = info.assets.map((chunk: { name: string }) => `client/${chunk.name}`);
+
+				create_serviceworker_manifest({
+					routes: create_routes(),
+					client_files
+				});
+
+				// we need to wait a beat before watching the service
+				// worker, because of some webpack nonsense
+				setTimeout(watch_serviceworker, 100);
+			}
+		});
+
+		let watch_serviceworker = compilers.serviceworker
+			? () => {
+				watch_serviceworker = noop;
+
+				this.watch(compilers.serviceworker, {
+					name: 'service worker',
+
+					result: info => {
+						fs.writeFileSync(path.join(dest, 'serviceworker_info.json'), JSON.stringify(info, null, '  '));
+					}
+				});
+			}
+			: noop;
+	}
+
+	close() {
+		if (this.closed) return;
+		this.closed = true;
+
+		this.dev_server.close();
+
+		if (this.proc) this.proc.kill();
+		this.filewatchers.forEach(watcher => {
+			watcher.close();
+		});
+	}
+
+	restart(filename: string, type: string) {
+		if (this.restarting) {
+			this.current_build.changed.add(filename);
+			this.current_build.rebuilding.add(type);
+		} else {
+			this.restarting = true;
+
+			this.current_build = {
+				changed: new Set(),
+				rebuilding: new Set(),
+				unique_warnings: new Set(),
+				unique_errors: new Set()
+			};
+
+			process.nextTick(() => {
+				this.emit('invalid', <events.InvalidEvent>{
+					changed: Array.from(this.current_build.changed),
+					invalid: {
+						server: this.current_build.rebuilding.has('server'),
+						client: this.current_build.rebuilding.has('client'),
+						serviceworker: this.current_build.rebuilding.has('serviceworker'),
+					}
+				});
+
+				this.restarting = false;
+			});
+		}
+	}
+
+	watch(compiler: any, { name, invalid = noop, result }: {
+		name: string,
+		invalid?: (filename: string) => void;
+		result: (stats: any) => void;
+	}) {
+		compiler.hooks.invalid.tap('sapper', (filename: string) => {
+			invalid(filename);
+		});
+
+		compiler.watch({}, (err: Error, stats: any) => {
+			if (err) {
+				this.emit('error', <events.ErrorEvent>{
+					type: name,
+					error: err
+				});
+			} else {
+				const messages = format_messages(stats);
+				const info = stats.toJson();
+
+				this.emit('build', {
+					type: name,
+
+					duration: info.time,
+
+					errors: messages.errors.map((message: string) => {
+						const duplicate = this.current_build.unique_errors.has(message);
+						this.current_build.unique_errors.add(message);
+
+						return mungeWebpackError(message, duplicate);
+					}),
+
+					warnings: messages.warnings.map((message: string) => {
+						const duplicate = this.current_build.unique_warnings.has(message);
+						this.current_build.unique_warnings.add(message);
+
+						return mungeWebpackError(message, duplicate);
+					}),
+				});
+
+				result(info);
+			}
+		});
+	}
+}
+
+const locPattern = /\((\d+):(\d+)\)$/;
+
+function mungeWebpackError(message: string, duplicate: boolean) {
+	// TODO this is all a bit rube goldberg...
+	const lines = message.split('\n');
+
+	const file = lines.shift()
+		.replace('', '') // careful — there is a special character at the beginning of this string
+		.replace('', '')
+		.replace('./', '');
+
+	let line = null;
+	let column = null;
+
+	const match = locPattern.exec(lines[0]);
+	if (match) {
+		lines[0] = lines[0].replace(locPattern, '');
+		line = +match[1];
+		column = +match[2];
+	}
+
+	return {
+		file,
+		line,
+		column,
+		message: lines.join('\n'),
+		originalMessage: message,
+		duplicate
+	};
+}
+
+class Deferred {
+	promise: Promise<any>;
+	fulfil: (value?: any) => void;
+	reject: (error: Error) => void;
+
+	constructor() {
+		this.promise = new Promise((fulfil, reject) => {
+			this.fulfil = fulfil;
+			this.reject = reject;
+		});
+	}
+}
+
+const INTERVAL = 10000;
+
+class DevServer {
+	clients: Set<http.ServerResponse>;
+	interval: NodeJS.Timer;
+	_: http.Server;
+
+	constructor(port: number, interval = 10000) {
+		this.clients = new Set();
+
+		this._ = http.createServer((req, res) => {
+			if (req.url !== '/__sapper__') return;
+
+			req.socket.setKeepAlive(true);
+			res.writeHead(200, {
+				'Access-Control-Allow-Origin': '*',
+				'Access-Control-Allow-Headers': 'Cache-Control',
+				'Content-Type': 'text/event-stream;charset=utf-8',
+				'Cache-Control': 'no-cache, no-transform',
+				'Connection': 'keep-alive',
+				// While behind nginx, event stream should not be buffered:
+				// http://nginx.org/docs/http/ngx_http_proxy_module.html#proxy_buffering
+				'X-Accel-Buffering': 'no'
+			});
+
+			res.write('\n');
+
+			this.clients.add(res);
+			req.on('close', () => {
+				this.clients.delete(res);
+			});
+		});
+
+		this._.listen(port);
+
+		this.interval = setInterval(() => {
+			this.send(null);
+		}, INTERVAL);
+	}
+
+	close() {
+		this._.close();
+		clearInterval(this.interval);
+	}
+
+	send(data: any) {
+		this.clients.forEach(client => {
+			client.write(`data: ${JSON.stringify(data)}\n\n`);
+		});
+	}
+}
+
+function noop() {}
+
+function watch_files(pattern: string, events: string[], callback: () => void) {
+	const chokidar = require('chokidar');
+
+	const watcher = chokidar.watch(pattern, {
+		persistent: true,
+		ignoreInitial: true,
+		disableGlobbing: true
+	});
+
+	events.forEach(event => {
+		watcher.on(event, callback);
+	});
+
+	return {
+		close: () => watcher.close()
+	};
+}

src/api/export.ts

@@ -0,0 +1,131 @@
+import * as child_process from 'child_process';
+import * as path from 'path';
+import * as sander from 'sander';
+import cheerio from 'cheerio';
+import URL from 'url-parse';
+import fetch from 'node-fetch';
+import * as ports from 'port-authority';
+import { EventEmitter } from 'events';
+import { minify_html } from './utils/minify_html';
+import { locations } from '../config';
+import * as events from './interfaces';
+
+export function exporter(opts: {}) {
+	const emitter = new EventEmitter();
+
+	execute(emitter, opts).then(
+		() => {
+			emitter.emit('done', <events.DoneEvent>{}); // TODO do we need to pass back any info?
+		},
+		error => {
+			emitter.emit('error', <events.ErrorEvent>{
+				error
+			});
+		}
+	);
+
+	return emitter;
+}
+
+async function execute(emitter: EventEmitter, {
+	build = 'build',
+	dest = 'export',
+	basepath = ''
+} = {}) {
+	const export_dir = path.join(dest, basepath);
+
+	// Prep output directory
+	sander.rimrafSync(export_dir);
+
+	sander.copydirSync('assets').to(export_dir);
+	sander.copydirSync(build, 'client').to(export_dir, 'client');
+
+	if (sander.existsSync(build, 'service-worker.js')) {
+		sander.copyFileSync(build, 'service-worker.js').to(export_dir, 'service-worker.js');
+	}
+
+	if (sander.existsSync(build, 'service-worker.js.map')) {
+		sander.copyFileSync(build, 'service-worker.js.map').to(export_dir, 'service-worker.js.map');
+	}
+
+	const port = await ports.find(3000);
+
+	const origin = `http://localhost:${port}`;
+
+	const proc = child_process.fork(path.resolve(`${build}/server.js`), [], {
+		cwd: process.cwd(),
+		env: Object.assign({
+			PORT: port,
+			NODE_ENV: 'production',
+			SAPPER_DEST: build,
+			SAPPER_EXPORT: 'true'
+		}, process.env)
+	});
+
+	const seen = new Set();
+	const saved = new Set();
+
+	proc.on('message', message => {
+		if (!message.__sapper__ || message.event !== 'file') return;
+
+		let file = new URL(message.url, origin).pathname.slice(1);
+		let { body } = message;
+
+		if (saved.has(file)) return;
+		saved.add(file);
+
+		const is_html = message.type === 'text/html';
+
+		if (is_html) {
+			file = file === '' ? 'index.html' : `${file}/index.html`;
+			body = minify_html(body);
+		}
+
+		emitter.emit('file', <events.FileEvent>{
+			file,
+			size: body.length
+		});
+
+		sander.writeFileSync(export_dir, file, body);
+	});
+
+	async function handle(url: URL) {
+		const r = await fetch(url.href);
+		const range = ~~(r.status / 100);
+
+		if (range >= 4) {
+			emitter.emit('failure', <events.FailureEvent>{
+				status: r.status,
+				pathname: url.pathname
+			});
+			return;
+		}
+
+		if (range === 2) {
+			if (r.headers.get('Content-Type') === 'text/html') {
+				const body = await r.text();
+				const $ = cheerio.load(body);
+				const urls: URL[] = [];
+
+				const base = new URL($('base').attr('href') || '/', url.href);
+
+				$('a[href]').each((i: number, $a) => {
+					const url = new URL($a.attribs.href, base.href);
+
+					if (url.origin === origin && !seen.has(url.pathname)) {
+						seen.add(url.pathname);
+						urls.push(url);
+					}
+				});
+
+				for (const url of urls) {
+					await handle(url);
+				}
+			}
+		}
+	}
+
+	return ports.wait(port)
+		.then(() => handle(new URL(`/${basepath}`, origin))) // TODO all static routes
+		.then(() => proc.kill());
+}

src/api/find_page.ts

@@ -0,0 +1,16 @@
+import * as glob from 'glob';
+import { locations } from '../config';
+import { create_routes } from '../core';
+
+export function find_page(pathname: string, files: string[] = glob.sync('**/*.*', { cwd: locations.routes(), dot: true, nodir: true })) {
+	const routes = create_routes({ files });
+
+	for (let i = 0; i < routes.length; i += 1) {
+		const route = routes[i];
+
+		if (route.pattern.test(pathname)) {
+			const page = route.handlers.find(handler => handler.type === 'page');
+			if (page) return page.file;
+		}
+	}
+}

src/api/interfaces.ts

@@ -0,0 +1,43 @@
+import * as child_process from 'child_process';
+
+export type ReadyEvent = {
+	port: number;
+	process: child_process.ChildProcess;
+};
+
+export type ErrorEvent = {
+	type: string;
+	message: string;
+};
+
+export type FatalEvent = {
+	message: string;
+};
+
+export type InvalidEvent = {
+	changed: string[];
+	invalid: {
+		client: boolean;
+		server: boolean;
+		serviceworker: boolean;
+	}
+};
+
+export type BuildEvent = {
+	type: string;
+	errors: Array<{ message: string, duplicate: boolean }>;
+	warnings: Array<{ message: string, duplicate: boolean }>;
+	duration: number;
+	webpack_stats: any;
+}
+
+export type FileEvent = {
+	file: string;
+	size: number;
+}
+
+export type FailureEvent = {
+
+}
+
+export type DoneEvent = {}

src/cli.ts

@@ -2,7 +2,7 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as child_process from 'child_process';
 import sade from 'sade';
-import * as clorox from 'clorox';
+import * as colors from 'ansi-colors';
 import prettyMs from 'pretty-ms';
 // import upgrade from './cli/upgrade';
 import * as ports from 'port-authority';
@@ -21,10 +21,12 @@ prog.command('dev')
 
 prog.command('build [dest]')
 	.describe('Create a production-ready version of your app')
-	.action(async (dest = 'build') => {
+	.option('-p, --port', 'Default of process.env.PORT', '3000')
+	.example(`build custom-dir -p 4567`)
+	.action(async (dest = 'build', opts: { port: string }) => {
 		console.log(`> Building...`);
 
-		process.env.NODE_ENV = 'production';
+		process.env.NODE_ENV = process.env.NODE_ENV || 'production';
 		process.env.SAPPER_DEST = dest;
 
 		const start = Date.now();
@@ -32,9 +34,23 @@ prog.command('build [dest]')
 		try {
 			const { build } = await import('./cli/build');
 			await build();
-			console.error(`\n> Finished in ${elapsed(start)}. Type ${clorox.bold.cyan(dest === 'build' ? 'npx sapper start' : `npx sapper start ${dest}`)} to run the app.`);
+
+			const launcher = path.resolve(dest, 'index.js');
+
+			fs.writeFileSync(launcher, `
+				// generated by sapper build at ${new Date().toISOString()}
+				process.env.NODE_ENV = process.env.NODE_ENV || 'production';
+				process.env.SAPPER_DEST = __dirname;
+				process.env.PORT = process.env.PORT || ${opts.port || 3000};
+
+				console.log('Starting server on port ' + process.env.PORT);
+				require('./server.js');
+			`.replace(/^\t+/gm, '').trim());
+
+			console.error(`\n> Finished in ${elapsed(start)}. Type ${colors.bold.cyan(`node ${dest}`)} to run the app.`);
 		} catch (err) {
 			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
+			process.exit(1);
 		}
 	});
 
@@ -65,9 +81,10 @@ prog.command('export [dest]')
 
 			const { exporter } = await import('./cli/export');
 			await exporter(dest, opts);
-			console.error(`\n> Finished in ${elapsed(start)}. Type ${clorox.bold.cyan(`npx serve ${dest}`)} to run the app.`);
+			console.error(`\n> Finished in ${elapsed(start)}. Type ${colors.bold.cyan(`npx serve ${dest}`)} to run the app.`);
 		} catch (err) {
 			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
+			process.exit(1);
 		}
 	});
 
@@ -77,4 +94,4 @@ prog.parse(process.argv);
 
 function elapsed(start: number) {
 	return prettyMs(Date.now() - start);
-}
+}

src/cli/build.ts

@@ -1,76 +1,32 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import * as clorox from 'clorox';
-import mkdirp from 'mkdirp';
-import rimraf from 'rimraf';
-import { minify_html } from './utils/minify_html';
-import { create_compilers, create_main_manifests, create_routes, create_serviceworker_manifest } from '../core'
+import { build as _build } from '../api/build';
+import * as colors from 'ansi-colors';
 import { locations } from '../config';
 
-export async function build() {
-	const output = locations.dest();
-
-	mkdirp.sync(output);
-	rimraf.sync(path.join(output, '**/*'));
-
-	// minify app/template.html
-	// TODO compile this to a function? could be quicker than str.replace(...).replace(...).replace(...)
-	const template = fs.readFileSync(`${locations.app()}/template.html`, 'utf-8');
-
-	// remove this in a future version
-	if (template.indexOf('%sapper.base%') === -1) {
-		console.log(`${clorox.bold.red(`> As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`)}`);
-		process.exit(1);
-	}
-
-	fs.writeFileSync(`${output}/template.html`, minify_html(template));
-
-	const routes = create_routes();
-
-	// create app/manifest/client.js and app/manifest/server.js
-	create_main_manifests({ routes });
-
-	const { client, server, serviceworker } = create_compilers();
-
-	const client_stats = await compile(client);
-	console.log(`${clorox.inverse(`\nbuilt client`)}`);
-	console.log(client_stats.toString({ colors: true }));
-	fs.writeFileSync(path.join(output, 'client_info.json'), JSON.stringify(client_stats.toJson()));
-
-	const server_stats = await compile(server);
-	console.log(`${clorox.inverse(`\nbuilt server`)}`);
-	console.log(server_stats.toString({ colors: true }));
-
-	let serviceworker_stats;
-
-	if (serviceworker) {
-		create_serviceworker_manifest({
-			routes,
-			client_files: client_stats.toJson().assets.map((chunk: { name: string }) => `client/${chunk.name}`)
-		});
-
-		serviceworker_stats = await compile(serviceworker);
-		console.log(`${clorox.inverse(`\nbuilt service worker`)}`);
-		console.log(serviceworker_stats.toString({ colors: true }));
-	}
-}
-
-function compile(compiler: any) {
+export function build() {
 	return new Promise((fulfil, reject) => {
-		compiler.run((err: Error, stats: any) => {
-			if (err) {
-				reject(err);
-				process.exit(1);
-			}
+		try {
+			const emitter = _build({
+				dest: locations.dest(),
+				app: locations.app(),
+				routes: locations.routes(),
+				webpack: 'webpack'
+			});
 
-			if (stats.hasErrors()) {
-				console.error(stats.toString({ colors: true }));
-				reject(new Error(`Encountered errors while building app`));
-			}
+			emitter.on('build', event => {
+				console.log(colors.inverse(`\nbuilt ${event.type}`));
+				console.log(event.webpack_stats.toString({ colors: true }));
+			});
 
-			else {
-				fulfil(stats);
-			}
-		});
+			emitter.on('error', event => {
+				reject(event.error);
+			});
+
+			emitter.on('done', event => {
+				fulfil();
+			});
+		} catch (err) {
+			console.log(`${colors.bold.red(`> ${err.message}`)}`);
+			process.exit(1);
+		}
 	});
-}
+}

src/cli/dev.ts

@@ -1,321 +1,77 @@
-import * as fs from 'fs';
 import * as path from 'path';
-import * as net from 'net';
-import * as clorox from 'clorox';
+import * as colors from 'ansi-colors';
 import * as child_process from 'child_process';
-import * as http from 'http';
-import mkdirp from 'mkdirp';
-import rimraf from 'rimraf';
-import format_messages from 'webpack-format-messages';
 import prettyMs from 'pretty-ms';
-import * as ports from 'port-authority';
-import { locations } from '../config';
-import { create_compilers, create_main_manifests, create_routes, create_serviceworker_manifest } from '../core';
+import { dev as _dev } from '../api/dev';
+import * as events from '../api/interfaces';
 
-type Deferred = {
-	promise?: Promise<any>;
-	fulfil?: (value?: any) => void;
-	reject?: (err: Error) => void;
-}
+export function dev(opts: { port: number, open: boolean }) {
+	try {
+		const watcher = _dev(opts);
 
-function deferred() {
-	const d: Deferred = {};
+		let first = true;
 
-	d.promise = new Promise((fulfil, reject) => {
-		d.fulfil = fulfil;
-		d.reject = reject;
-	});
+		watcher.on('ready', (event: events.ReadyEvent) => {
+			if (first) {
+				console.log(`${colors.bold.cyan(`> Listening on http://localhost:${event.port}`)}`);
+				if (opts.open) child_process.exec(`open http://localhost:${event.port}`);
+				first = false;
+			}
 
-	return d;
-}
+			// TODO clear screen?
 
-function create_hot_update_server(port: number, interval = 10000) {
-	const clients = new Set();
+			event.process.stdout.on('data', data => {
+				process.stdout.write(data);
+			});
 
-	const server = http.createServer((req, res) => {
-		if (req.url !== '/__sapper__') return;
-
-		req.socket.setKeepAlive(true);
-		res.writeHead(200, {
-			'Access-Control-Allow-Origin': '*',
-			'Access-Control-Allow-Headers': 'Cache-Control',
-			'Content-Type': 'text/event-stream;charset=utf-8',
-			'Cache-Control': 'no-cache, no-transform',
-			'Connection': 'keep-alive',
-			// While behind nginx, event stream should not be buffered:
-			// http://nginx.org/docs/http/ngx_http_proxy_module.html#proxy_buffering
-			'X-Accel-Buffering': 'no'
+			event.process.stderr.on('data', data => {
+				process.stderr.write(data);
+			});
 		});
 
-		res.write('\n');
-
-		clients.add(res);
-		req.on('close', () => {
-			clients.delete(res);
-		});
-	});
-
-	server.listen(port);
-
-	function send(data: any) {
-		clients.forEach(client => {
-			client.write(`data: ${JSON.stringify(data)}\n\n`);
-		});
-	}
-
-	setInterval(() => {
-		send(null)
-	}, interval);
-
-	return { send };
-}
-
-export async function dev(opts: { port: number, open: boolean }) {
-	// remove this in a future version
-	const template = fs.readFileSync(path.join(locations.app(), 'template.html'), 'utf-8');
-	if (template.indexOf('%sapper.base%') === -1) {
-		console.log(`${clorox.bold.red(`> As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`)}`);
-		process.exit(1);
-	}
-
-	process.env.NODE_ENV = 'development';
-
-	let port = opts.port || +process.env.PORT;
-
-	if (port) {
-		if (!await ports.check(port)) {
-			console.log(`${clorox.bold.red(`> Port ${port} is unavailable`)}`);
-			return;
-		}
-	} else {
-		port = await ports.find(3000);
-	}
-
-	const dir = locations.dest();
-	rimraf.sync(dir);
-	mkdirp.sync(dir);
-
-	const dev_port = await ports.find(10000);
-
-	const routes = create_routes();
-	create_main_manifests({ routes, dev_port });
-
-	const hot_update_server = create_hot_update_server(dev_port);
-
-	watch_files(locations.routes(), ['add', 'unlink'], () => {
-		const routes = create_routes();
-		create_main_manifests({ routes, dev_port });
-	});
-
-	watch_files(`${locations.app()}/template.html`, ['change'], () => {
-		hot_update_server.send({
-			action: 'reload'
-		});
-	});
-
-	let proc: child_process.ChildProcess;
-
-	process.on('exit', () => {
-		// sometimes webpack crashes, so we need to kill our children
-		if (proc) proc.kill();
-	});
-
-	const deferreds = {
-		server: deferred(),
-		client: deferred()
-	};
-
-	let restarting = false;
-	let build = {
-		unique_warnings: new Set(),
-		unique_errors: new Set()
-	};
-
-	function restart_build(filename: string) {
-		if (restarting) return;
-
-		restarting = true;
-		build = {
-			unique_warnings: new Set(),
-			unique_errors: new Set()
-		};
-
-		process.nextTick(() => {
-			restarting = false;
+		watcher.on('invalid', (event: events.InvalidEvent) => {
+			const changed = event.changed.map(filename => path.relative(process.cwd(), filename)).join(', ');
+			console.log(`\n${colors.bold.cyan(changed)} changed. rebuilding...`);
 		});
 
-		console.log(`\n${clorox.bold.cyan(path.relative(process.cwd(), filename))} changed. rebuilding...`);
-	}
-
-	// TODO watch the configs themselves?
-	const compilers = create_compilers();
-
-	function watch(compiler: any, { name, invalid = noop, error = noop, result }: {
-		name: string,
-		invalid?: (filename: string) => void;
-		error?: (error: Error) => void;
-		result: (stats: any) => void;
-	}) {
-		compiler.hooks.invalid.tap('sapper', (filename: string) => {
-			invalid(filename);
+		watcher.on('error', (event: events.ErrorEvent) => {
+			console.log(`${colors.red(`✗ ${event.type}`)}`);
+			console.log(`${colors.red(event.error.message)}`);
 		});
 
-		compiler.watch({}, (err: Error, stats: any) => {
-			if (err) {
-				console.log(`${clorox.red(`✗ ${name}`)}`);
-				console.log(`${clorox.red(err.message)}`);
-				error(err);
-			} else {
-				const messages = format_messages(stats);
-				const info = stats.toJson();
+		watcher.on('fatal', (event: events.FatalEvent) => {
+			console.log(`${colors.bold.red(`> ${event.error.message}`)}`);
+		});
 
-				if (messages.errors.length > 0) {
-					console.log(`${clorox.bold.red(`✗ ${name}`)}`);
+		watcher.on('build', (event: events.BuildEvent) => {
+			if (event.errors.length) {
+				console.log(`${colors.bold.red(`✗ ${event.type}`)}`);
 
-					const filtered = messages.errors.filter((message: string) => {
-						return !build.unique_errors.has(message);
-					});
+				event.errors.filter(e => !e.duplicate).forEach(error => {
+					console.log(error.message);
+				});
 
-					filtered.forEach((message: string) => {
-						build.unique_errors.add(message);
-						console.log(message);
-					});
-
-					const hidden = messages.errors.length - filtered.length;
-					if (hidden > 0) {
-						console.log(`${hidden} duplicate ${hidden === 1 ? 'error' : 'errors'} hidden\n`);
-					}
-				} else {
-					if (messages.warnings.length > 0) {
-						console.log(`${clorox.bold.yellow(`• ${name}`)}`);
-
-						const filtered = messages.warnings.filter((message: string) => {
-							return !build.unique_warnings.has(message);
-						});
-
-						filtered.forEach((message: string) => {
-							build.unique_warnings.add(message);
-							console.log(`${message}\n`);
-						});
-
-						const hidden = messages.warnings.length - filtered.length;
-						if (hidden > 0) {
-							console.log(`${hidden} duplicate ${hidden === 1 ? 'warning' : 'warnings'} hidden\n`);
-						}
-					} else {
-						console.log(`${clorox.bold.green(`✔ ${name}`)} ${clorox.gray(`(${prettyMs(info.time)})`)}`);
-					}
-
-					result(info);
+				const hidden = event.errors.filter(e => e.duplicate).length;
+				if (hidden > 0) {
+					console.log(`${hidden} duplicate ${hidden === 1 ? 'error' : 'errors'} hidden\n`);
 				}
+			} else if (event.warnings.length) {
+				console.log(`${colors.bold.yellow(`• ${event.type}`)}`);
+
+				event.warnings.filter(e => !e.duplicate).forEach(warning => {
+					console.log(warning.message);
+				});
+
+				const hidden = event.warnings.filter(e => e.duplicate).length;
+				if (hidden > 0) {
+					console.log(`${hidden} duplicate ${hidden === 1 ? 'warning' : 'warnings'} hidden\n`);
+				}
+			} else {
+				console.log(`${colors.bold.green(`✔ ${event.type}`)} ${colors.gray(`(${prettyMs(event.duration)})`)}`);
 			}
 		});
+	} catch (err) {
+		console.log(`${colors.bold.red(`> ${err.message}`)}`);
+		process.exit(1);
 	}
-
-	watch(compilers.server, {
-		name: 'server',
-
-		invalid: filename => {
-			restart_build(filename);
-			// TODO print message
-			deferreds.server = deferred();
-		},
-
-		result: info => {
-			// TODO log compile errors/warnings
-
-			fs.writeFileSync(path.join(dir, 'server_info.json'), JSON.stringify(info, null, '  '));
-
-			deferreds.client.promise.then(() => {
-				function restart() {
-					ports.wait(port).then(deferreds.server.fulfil);
-				}
-
-				if (proc) {
-					proc.kill();
-					proc.on('exit', restart);
-				} else {
-					restart();
-				}
-
-				proc = child_process.fork(`${dir}/server.js`, [], {
-					cwd: process.cwd(),
-					env: Object.assign({
-						PORT: port
-					}, process.env)
-				});
-			});
-		}
-	});
-
-	let first = true;
-
-	watch(compilers.client, {
-		name: 'client',
-
-		invalid: filename => {
-			restart_build(filename);
-			deferreds.client = deferred();
-
-			// TODO we should delete old assets. due to a webpack bug
-			// i don't even begin to comprehend, this is apparently
-			// quite difficult
-		},
-
-		result: info => {
-			fs.writeFileSync(path.join(dir, 'client_info.json'), JSON.stringify(info, null, '  '));
-			deferreds.client.fulfil();
-
-			const client_files = info.assets.map((chunk: { name: string }) => `client/${chunk.name}`);
-
-			deferreds.server.promise.then(() => {
-				hot_update_server.send({
-					status: 'completed'
-				});
-
-				if (first) {
-					first = false;
-					console.log(`${clorox.bold.cyan(`> Listening on http://localhost:${port}`)}`);
-					if (opts.open) child_process.exec(`open http://localhost:${port}`);
-				}
-			});
-
-			create_serviceworker_manifest({
-				routes: create_routes(),
-				client_files
-			});
-
-			watch_serviceworker();
-		}
-	});
-
-	let watch_serviceworker = compilers.serviceworker
-		? function() {
-			watch_serviceworker = noop;
-
-			watch(compilers.serviceworker, {
-				name: 'service worker',
-
-				result: info => {
-					fs.writeFileSync(path.join(dir, 'serviceworker_info.json'), JSON.stringify(info, null, '  '));
-				}
-			});
-		}
-		: noop;
-}
-
-function noop() {}
-
-function watch_files(pattern: string, events: string[], callback: () => void) {
-	const chokidar = require('chokidar');
-
-	const watcher = chokidar.watch(pattern, {
-		persistent: true,
-		ignoreInitial: true,
-		disableGlobbing: true
-	});
-
-	events.forEach(event => {
-		watcher.on(event, callback);
-	});
-}
+}

src/cli/export.ts

@@ -1,106 +1,35 @@
-import * as child_process from 'child_process';
-import * as path from 'path';
-import * as sander from 'sander';
-import * as clorox from 'clorox';
-import cheerio from 'cheerio';
-import URL from 'url-parse';
-import fetch from 'node-fetch';
-import * as ports from 'port-authority';
+import { exporter as _exporter } from '../api/export';
+import * as colors from 'ansi-colors';
 import prettyBytes from 'pretty-bytes';
-import { minify_html } from './utils/minify_html';
 import { locations } from '../config';
 
-export async function exporter(export_dir: string, { basepath = '' }) {
-	const build_dir = locations.dest();
+export function exporter(export_dir: string, { basepath = '' }) {
+	return new Promise((fulfil, reject) => {
+		try {
+			const emitter = _exporter({
+				build: locations.dest(),
+				dest: export_dir,
+				basepath
+			});
 
-	export_dir = path.join(export_dir, basepath);
+			emitter.on('file', event => {
+				console.log(`${colors.bold.cyan(event.file)} ${colors.gray(`(${prettyBytes(event.size)})`)}`);
+			});
 
-	// Prep output directory
-	sander.rimrafSync(export_dir);
+			emitter.on('failure', event => {
+				console.log(`${colors.red(`> Received ${event.status} response when fetching ${event.pathname}`)}`);
+			});
 
-	sander.copydirSync('assets').to(export_dir);
-	sander.copydirSync(build_dir, 'client').to(export_dir, 'client');
+			emitter.on('error', event => {
+				reject(event.error);
+			});
 
-	if (sander.existsSync(build_dir, 'service-worker.js')) {
-		sander.copyFileSync(build_dir, 'service-worker.js').to(export_dir, 'service-worker.js');
-	}
-
-	if (sander.existsSync(build_dir, 'service-worker.js.map')) {
-		sander.copyFileSync(build_dir, 'service-worker.js.map').to(export_dir, 'service-worker.js.map');
-	}
-
-	const port = await ports.find(3000);
-
-	const origin = `http://localhost:${port}`;
-
-	const proc = child_process.fork(path.resolve(`${build_dir}/server.js`), [], {
-		cwd: process.cwd(),
-		env: Object.assign({
-			PORT: port,
-			NODE_ENV: 'production',
-			SAPPER_DEST: build_dir,
-			SAPPER_EXPORT: 'true'
-		}, process.env)
+			emitter.on('done', event => {
+				fulfil();
+			});
+		} catch (err) {
+			console.log(`${colors.bold.red(`> ${err.message}`)}`);
+			process.exit(1);
+		}
 	});
-
-	const seen = new Set();
-	const saved = new Set();
-
-	proc.on('message', message => {
-		if (!message.__sapper__) return;
-
-		let file = new URL(message.url, origin).pathname.slice(1);
-		let { body } = message;
-
-		if (saved.has(file)) return;
-		saved.add(file);
-
-		const is_html = message.type === 'text/html';
-
-		if (is_html) {
-			file = file === '' ? 'index.html' : `${file}/index.html`;
-			body = minify_html(body);
-		}
-
-		console.log(`${clorox.bold.cyan(file)} ${clorox.gray(`(${prettyBytes(body.length)})`)}`);
-
-		sander.writeFileSync(export_dir, file, body);
-	});
-
-	async function handle(url: URL) {
-		const r = await fetch(url.href);
-		const range = ~~(r.status / 100);
-
-		if (range >= 4) {
-			console.log(`${clorox.red(`> Received ${r.status} response when fetching ${url.pathname}`)}`);
-			return;
-		}
-
-		if (range === 2) {
-			if (r.headers.get('Content-Type') === 'text/html') {
-				const body = await r.text();
-				const $ = cheerio.load(body);
-				const urls: URL[] = [];
-
-				const base = new URL($('base').attr('href') || '/', url.href);
-
-				$('a[href]').each((i: number, $a) => {
-					const url = new URL($a.attribs.href, base.href);
-
-					if (url.origin === origin && !seen.has(url.pathname)) {
-						seen.add(url.pathname);
-						urls.push(url);
-					}
-				});
-
-				for (const url of urls) {
-					await handle(url);
-				}
-			}
-		}
-	}
-
-	return ports.wait(port)
-		.then(() => handle(new URL(`/${basepath}`, origin))) // TODO all static routes
-		.then(() => proc.kill());
-}
+}

src/cli/start.ts

@@ -1,7 +1,7 @@
 import * as fs from 'fs';
 import * as path from 'path';
 import * as child_process from 'child_process';
-import * as clorox from 'clorox';
+import * as colors from 'ansi-colors';
 import * as ports from 'port-authority';
 
 export async function start(dir: string, opts: { port: number, open: boolean }) {
@@ -11,13 +11,13 @@ export async function start(dir: string, opts: { port: number, open: boolean })
 	const server = path.resolve(dir, 'server.js');
 
 	if (!fs.existsSync(server)) {
-		console.log(`${clorox.bold.red(`> ${dir}/server.js does not exist — type ${clorox.bold.cyan(dir === 'build' ? `npx sapper build` : `npx sapper build ${dir}`)} to create it`)}`);
+		console.log(`${colors.bold.red(`> ${dir}/server.js does not exist — type ${colors.bold.cyan(dir === 'build' ? `npx sapper build` : `npx sapper build ${dir}`)} to create it`)}`);
 		return;
 	}
 
 	if (port) {
 		if (!await ports.check(port)) {
-			console.log(`${clorox.bold.red(`> Port ${port} is unavailable`)}`);
+			console.log(`${colors.bold.red(`> Port ${port} is unavailable`)}`);
 			return;
 		}
 	} else {
@@ -34,6 +34,6 @@ export async function start(dir: string, opts: { port: number, open: boolean })
 	});
 
 	await ports.wait(port);
-	console.log(`${clorox.bold.cyan(`> Listening on http://localhost:${port}`)}`);
+	console.log(`${colors.bold.cyan(`> Listening on http://localhost:${port}`)}`);
 	if (opts.open) child_process.exec(`open http://localhost:${port}`);
-}
+}

src/cli/upgrade.ts

@@ -1,5 +1,5 @@
 import * as fs from 'fs';
-import * as clorox from 'clorox';
+import * as colors from 'ansi-colors';
 
 export default async function upgrade() {
 	const upgraded = [
@@ -27,10 +27,10 @@ async function upgrade_sapper_main() {
 
 		if (/\%sapper\.main\%/.test(template)) {
 			if (!pattern.test(template)) {
-				console.log(`${clorox.red(`Could not replace %sapper.main% in ${file}`)}`);
+				console.log(`${colors.red(`Could not replace %sapper.main% in ${file}`)}`);
 			} else {
 				write(file, template.replace(pattern, `%sapper.scripts%`));
-				console.log(`${clorox.green(`Replaced %sapper.main% in ${file}`)}`);
+				console.log(`${colors.green(`Replaced %sapper.main% in ${file}`)}`);
 				replaced = true;
 			}
 		}

src/core/create_compilers.ts

@@ -1,21 +1,21 @@
 import * as path from 'path';
 import relative from 'require-relative';
 
-export default function create_compilers() {
-	const webpack = relative('webpack', process.cwd());
+export default function create_compilers({ webpack }: { webpack: string }) {
+	const wp = relative('webpack', process.cwd());
 
-	const serviceworker_config = try_require(path.resolve('webpack/service-worker.config.js'));
+	const serviceworker_config = try_require(path.resolve(`${webpack}/service-worker.config.js`));
 
 	return {
-		client: webpack(
-			require(path.resolve('webpack/client.config.js'))
+		client: wp(
+			require(path.resolve(`${webpack}/client.config.js`))
 		),
 
-		server: webpack(
-			require(path.resolve('webpack/server.config.js'))
+		server: wp(
+			require(path.resolve(`${webpack}/server.config.js`))
 		),
 
-		serviceworker: serviceworker_config && webpack(serviceworker_config)
+		serviceworker: serviceworker_config && wp(serviceworker_config)
 	};
 }
 

src/core/create_manifests.ts

@@ -1,7 +1,6 @@
 import * as fs from 'fs';
 import * as path from 'path';
 import * as glob from 'glob';
-import create_routes from './create_routes';
 import { posixify, write_if_changed } from './utils';
 import { dev, locations } from '../config';
 import { Route } from '../interfaces';
@@ -45,11 +44,13 @@ function generate_client(routes: Route[], path_to_routes: string, dev_port?: num
 		export const routes = [
 			${routes
 				.map(route => {
-					if (route.type !== 'page') {
+					const page = route.handlers.find(({ type }) => type === 'page');
+
+					if (!page) {
 						return `{ pattern: ${route.pattern}, ignore: true }`;
 					}
 
-					const file = posixify(`${path_to_routes}/${route.file}`);
+					const file = posixify(`${path_to_routes}/${page.file}`);
 
 					if (route.id === '_4xx' || route.id === '_5xx') {
 						return `{ error: '${route.id.slice(1)}', load: () => import(/* webpackChunkName: "${route.id}" */ '${file}') }`;
@@ -85,28 +86,36 @@ function generate_server(routes: Route[], path_to_routes: string) {
 	let code = `
 		// This file is generated by Sapper — do not edit it!
 		${routes
-			.map(route => {
-				const file = posixify(`${path_to_routes}/${route.file}`);
-				return route.type === 'page'
-					? `import ${route.id} from '${file}';`
-					: `import * as ${route.id} from '${file}';`;
-			})
+			.map(route =>
+				route.handlers
+					.map(({ type, file }, index) => {
+						const module = posixify(`${path_to_routes}/${file}`);
+
+						return type === 'page'
+							? `import ${route.id}${index} from '${module}';`
+							: `import * as ${route.id}${index} from '${module}';`;
+					})
+					.join('\n')
+			)
 			.join('\n')}
 
 		export const routes = [
 			${routes
 				.map(route => {
-					const file = posixify(`../../${route.file}`);
+					const handlers = route.handlers
+						.map(({ type }, index) =>
+							`{ type: '${type}', module: ${route.id}${index} }`)
+						.join(', ');
 
 					if (route.id === '_4xx' || route.id === '_5xx') {
-						return `{ error: '${route.id.slice(1)}', module: ${route.id} }`;
+						return `{ error: '${route.id.slice(1)}', handlers: [${handlers}] }`;
 					}
 
 					const params = route.params.length === 0
 						? '{}'
 						: `{ ${route.params.map((part, i) => `${part}: match[${i + 1}]`).join(', ')} }`;
 
-					return `{ id: '${route.id}', type: '${route.type}', pattern: ${route.pattern}, params: ${route.params.length > 0 ? `match` : `()`} => (${params}), module: ${route.id} }`;
+					return `{ id: '${route.id}', pattern: ${route.pattern}, params: ${route.params.length > 0 ? `match` : `()`} => (${params}), handlers: [${handlers}] }`;
 				})
 				.join(',\n\t')
 			}

src/core/create_routes.ts

@@ -5,8 +5,9 @@ import { Route } from '../interfaces';
 
 export default function create_routes({ files } = { files: glob.sync('**/*.*', { cwd: locations.routes(), dot: true, nodir: true }) }) {
 	const routes: Route[] = files
+		.filter((file: string) => !/(^|\/|\\)_/.test(file))
 		.map((file: string) => {
-			if (/(^|\/|\\)_/.test(file)) return;
+			if (/(^|\/|\\)(_|\.(?!well-known))/.test(file)) return;
 
 			if (/]\[/.test(file)) {
 				throw new Error(`Invalid route ${file} — parameters must be separated`);
@@ -16,6 +17,58 @@ export default function create_routes({ files } = { files: glob.sync('**/*.*', {
 			const parts = base.split('/'); // glob output is always posix-style
 			if (parts[parts.length - 1] === 'index') parts.pop();
 
+			return {
+				files: [file],
+				base,
+				parts
+			};
+		})
+		.filter(Boolean)
+		.filter((a, index, array) => {
+			const found = array.slice(index + 1).find(b => a.base === b.base);
+			if (found) found.files.push(...a.files);
+			return !found;
+		})
+		.sort((a, b) => {
+			if (a.parts[0] === '4xx' || a.parts[0] === '5xx') return -1;
+			if (b.parts[0] === '4xx' || b.parts[0] === '5xx') return 1;
+
+			const max = Math.max(a.parts.length, b.parts.length);
+
+			for (let i = 0; i < max; i += 1) {
+				const a_part = a.parts[i];
+				const b_part = b.parts[i];
+
+				if (!a_part) return -1;
+				if (!b_part) return 1;
+
+				const a_sub_parts = get_sub_parts(a_part);
+				const b_sub_parts = get_sub_parts(b_part);
+				const max = Math.max(a_sub_parts.length, b_sub_parts.length);
+
+				for (let i = 0; i < max; i += 1) {
+					const a_sub_part = a_sub_parts[i];
+					const b_sub_part = b_sub_parts[i];
+
+					if (!a_sub_part) return 1; // b is more specific, so goes first
+					if (!b_sub_part) return -1;
+
+					if (a_sub_part.dynamic !== b_sub_part.dynamic) {
+						return a_sub_part.dynamic ? 1 : -1;
+					}
+
+					if (!a_sub_part.dynamic && a_sub_part.content !== b_sub_part.content) {
+						return (
+							(b_sub_part.content.length - a_sub_part.content.length) ||
+							(a_sub_part.content < b_sub_part.content ? -1 : 1)
+						);
+					}
+				}
+			}
+
+			throw new Error(`The ${a.base} and ${b.base} routes clash`);
+		})
+		.map(({ files, base, parts }) => {
 			const id = (
 				parts.join('_').replace(/[[\]]/g, '$').replace(/^\d/, '_$&').replace(/[^a-zA-Z0-9_$]/g, '_')
 			 ) || '_';
@@ -63,54 +116,26 @@ export default function create_routes({ files } = { files: glob.sync('**/*.*', {
 
 			return {
 				id,
-				type: path.extname(file) === '.html' ? 'page' : 'route',
-				file,
+				handlers: files.map(file => ({
+					type: path.extname(file) === '.html' ? 'page' : 'route',
+					file
+				})).sort((a, b) => {
+					if (a.type === 'page' && b.type === 'route') {
+						return 1;
+					}
+
+					if (a.type === 'route' && b.type === 'page') {
+						return -1;
+					}
+
+					return 0;
+				}),
 				pattern,
 				test,
 				exec,
 				parts,
 				params
 			};
-		})
-		.filter(Boolean)
-		.sort((a: Route, b: Route) => {
-			if (a.file === '4xx.html' || a.file === '5xx.html') return -1;
-			if (b.file === '4xx.html' || b.file === '5xx.html') return 1;
-
-			const max = Math.max(a.parts.length, b.parts.length);
-
-			for (let i = 0; i < max; i += 1) {
-				const a_part = a.parts[i];
-				const b_part = b.parts[i];
-
-				if (!a_part) return -1;
-				if (!b_part) return 1;
-
-				const a_sub_parts = get_sub_parts(a_part);
-				const b_sub_parts = get_sub_parts(b_part);
-				const max = Math.max(a_sub_parts.length, b_sub_parts.length);
-
-				for (let i = 0; i < max; i += 1) {
-					const a_sub_part = a_sub_parts[i];
-					const b_sub_part = b_sub_parts[i];
-
-					if (!a_sub_part) return 1; // b is more specific, so goes first
-					if (!b_sub_part) return -1;
-
-					if (a_sub_part.dynamic !== b_sub_part.dynamic) {
-						return a_sub_part.dynamic ? 1 : -1;
-					}
-
-					if (!a_sub_part.dynamic && a_sub_part.content !== b_sub_part.content) {
-						return (
-							(b_sub_part.content.length - a_sub_part.content.length) ||
-							(a_sub_part.content < b_sub_part.content ? -1 : 1)
-						);
-					}
-				}
-			}
-
-			throw new Error(`The ${a.file} and ${b.file} routes clash`);
 		});
 
 	return routes;

src/interfaces.ts

@@ -1,7 +1,9 @@
 export type Route = {
 	id: string;
-	type: 'page' | 'route';
-	file: string;
+	handlers: {
+		type: 'page' | 'route';
+		file: string;
+	}[];
 	pattern: RegExp;
 	test: (url: string) => boolean;
 	exec: (url: string) => Record<string, string>;

src/middleware.ts

@@ -1,16 +1,12 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import { resolve, URL } from 'url';
+import { URL } from 'url';
 import { ClientRequest, ServerResponse } from 'http';
 import cookie from 'cookie';
-import mkdirp from 'mkdirp';
-import rimraf from 'rimraf';
 import devalue from 'devalue';
 import fetch from 'node-fetch';
 import { lookup } from './middleware/mime';
-import { create_routes, create_compilers } from './core';
 import { locations, dev } from './config';
-import { Route, Template } from './interfaces';
 import sourceMapSupport from 'source-map-support';
 
 sourceMapSupport.install();
@@ -20,14 +16,7 @@ type RouteObject = {
 	type: 'page' | 'route';
 	pattern: RegExp;
 	params: (match: RegExpMatchArray) => Record<string, string>;
-	module: {
-		render: (data: any, opts: { store: Store }) => {
-			head: string;
-			css: { code: string, map: any };
-			html: string
-		},
-		preload: (data: any) => any | Promise<any>
-	};
+	module: Component;
 	error?: string;
 }
 
@@ -47,13 +36,29 @@ interface Req extends ClientRequest {
 	headers: Record<string, string>;
 }
 
-export default function middleware({ routes, store }: {
+interface Component {
+	render: (data: any, opts: { store: Store }) => {
+		head: string;
+		css: { code: string, map: any };
+		html: string
+	},
+	preload: (data: any) => any | Promise<any>
+}
+
+export default function middleware({ App, routes, store }: {
+	App: Component,
 	routes: RouteObject[],
 	store: (req: Req) => Store
 }) {
+	if (!App) {
+		throw new Error(`As of 0.12, you must supply an App component to Sapper — see https://sapper.svelte.technology/guide#0-11-to-0-12 for more information`);
+	}
+
 	const output = locations.dest();
 
-	const client_info = JSON.parse(fs.readFileSync(path.join(output, 'client_info.json'), 'utf-8'));
+	const client_assets = JSON.parse(fs.readFileSync(path.join(output, 'client_assets.json'), 'utf-8'));
+
+	let emitted_basepath = false;
 
 	const middleware = compose_handlers([
 		(req: Req, res: ServerResponse, next: () => void) => {
@@ -63,6 +68,16 @@ export default function middleware({ routes, store }: {
 					: '';
 			}
 
+			if (!emitted_basepath && process.send) {
+				process.send({
+					__sapper__: true,
+					event: 'basepath',
+					basepath: req.baseUrl
+				});
+
+				emitted_basepath = true;
+			}
+
 			if (req.path === undefined) {
 				req.path = req.url.replace(/\?.*/, '');
 			}
@@ -90,7 +105,7 @@ export default function middleware({ routes, store }: {
 			cache_control: 'max-age=31536000'
 		}),
 
-		get_route_handler(client_info.assetsByChunkName, routes, store)
+		get_route_handler(client_assets, App, routes, store)
 	].filter(Boolean));
 
 	return middleware;
@@ -133,9 +148,7 @@ function serve({ prefix, pathname, cache_control }: {
 	};
 }
 
-const resolved = Promise.resolve();
-
-function get_route_handler(chunks: Record<string, string>, routes: RouteObject[], store_getter: (req: Req) => Store) {
+function get_route_handler(chunks: Record<string, string>, App: Component, routes: RouteObject[], store_getter: (req: Req) => Store) {
 	const template = dev()
 		? () => fs.readFileSync(`${locations.app()}/template.html`, 'utf-8')
 		: (str => () => str)(fs.readFileSync(`${locations.dest()}/template.html`, 'utf-8'));
@@ -143,195 +156,214 @@ function get_route_handler(chunks: Record<string, string>, routes: RouteObject[]
 	function handle_route(route: RouteObject, req: Req, res: ServerResponse) {
 		req.params = route.params(route.pattern.exec(req.path));
 
-		const mod = route.module;
+		const handlers = route.handlers[Symbol.iterator]();
 
-		if (route.type === 'page') {
-			res.setHeader('Content-Type', 'text/html');
+		function next() {
+			try {
+				const { value: handler, done } = handlers.next();
 
-			// preload main.js and current route
-			// TODO detect other stuff we can preload? images, CSS, fonts?
-			const link = []
-				.concat(chunks.main, chunks[route.id])
-				.filter(file => !file.match(/\.map$/))
-				.map(file => `<${req.baseUrl}/client/${file}>;rel="preload";as="script"`)
-				.join(', ');
+				if (done) {
+					handle_error(req, res, 404, 'Not found');
+					return;
+				}
 
-			res.setHeader('Link', link);
+				const mod = handler.module;
 
-			const store = store_getter ? store_getter(req) : null;
-			const data = { params: req.params, query: req.query };
+				if (handler.type === 'page') {
+					res.setHeader('Content-Type', 'text/html');
 
-			let redirect: { statusCode: number, location: string };
-			let error: { statusCode: number, message: Error | string };
+					// preload main.js and current route
+					// TODO detect other stuff we can preload? images, CSS, fonts?
+					const link = []
+						.concat(chunks.main, chunks[route.id])
+						.filter(file => !file.match(/\.map$/))
+						.map(file => `<${req.baseUrl}/client/${file}>;rel="preload";as="script"`)
+						.join(', ');
 
-			Promise.resolve(
-				mod.preload ? mod.preload.call({
-					redirect: (statusCode: number, location: string) => {
-						redirect = { statusCode, location };
-					},
-					error: (statusCode: number, message: Error | string) => {
-						error = { statusCode, message };
-					},
-					fetch: (url: string, opts?: any) => {
-						const parsed = new URL(url, `http://127.0.0.1:${process.env.PORT}${req.baseUrl ? req.baseUrl + '/'  :''}`);
+					res.setHeader('Link', link);
 
-						if (opts) {
-							opts = Object.assign({}, opts);
+					const store = store_getter ? store_getter(req) : null;
+					const props = { params: req.params, query: req.query, path: req.path };
 
-							const include_cookies = (
-								opts.credentials === 'include' ||
-								opts.credentials === 'same-origin' && parsed.origin === `http://127.0.0.1:${process.env.PORT}`
-							);
+					let redirect: { statusCode: number, location: string };
+					let error: { statusCode: number, message: Error | string };
 
-							if (include_cookies) {
-								const cookies: Record<string, string> = {};
-								if (!opts.headers) opts.headers = {};
+					Promise.resolve(
+						mod.preload ? mod.preload.call({
+							redirect: (statusCode: number, location: string) => {
+								redirect = { statusCode, location };
+							},
+							error: (statusCode: number, message: Error | string) => {
+								error = { statusCode, message };
+							},
+							fetch: (url: string, opts?: any) => {
+								const parsed = new URL(url, `http://127.0.0.1:${process.env.PORT}${req.baseUrl ? req.baseUrl + '/'  :''}`);
 
-								const str = []
-									.concat(
-										cookie.parse(req.headers.cookie || ''),
-										cookie.parse(opts.headers.cookie || ''),
-										cookie.parse(res.getHeader('Set-Cookie') || '')
-									)
-									.map(cookie => {
-										return Object.keys(cookie)
-											.map(name => `${name}=${encodeURIComponent(cookie[name])}`)
-											.join('; ');
-									})
-									.filter(Boolean)
-									.join(', ');
+								if (opts) {
+									opts = Object.assign({}, opts);
 
-								opts.headers.cookie = str;
-							}
+									const include_cookies = (
+										opts.credentials === 'include' ||
+										opts.credentials === 'same-origin' && parsed.origin === `http://127.0.0.1:${process.env.PORT}`
+									);
+
+									if (include_cookies) {
+										const cookies: Record<string, string> = {};
+										if (!opts.headers) opts.headers = {};
+
+										const str = []
+											.concat(
+												cookie.parse(req.headers.cookie || ''),
+												cookie.parse(opts.headers.cookie || ''),
+												cookie.parse(res.getHeader('Set-Cookie') || '')
+											)
+											.map(cookie => {
+												return Object.keys(cookie)
+													.map(name => `${name}=${encodeURIComponent(cookie[name])}`)
+													.join('; ');
+											})
+											.filter(Boolean)
+											.join(', ');
+
+										opts.headers.cookie = str;
+									}
+								}
+
+								return fetch(parsed.href, opts);
+							},
+						store
+						}, req) : {}
+					).catch(err => {
+						error = { statusCode: 500, message: err };
+					}).then(preloaded => {
+						if (redirect) {
+							res.statusCode = redirect.statusCode;
+							res.setHeader('Location', `${req.baseUrl}/${redirect.location}`);
+							res.end();
+
+							return;
 						}
 
-						return fetch(parsed.href, opts);
-					},
-					store
-				}, req) : {}
-			).catch(err => {
-				error = { statusCode: 500, message: err };
-			}).then(preloaded => {
-				if (redirect) {
-					res.statusCode = redirect.statusCode;
-					res.setHeader('Location', `${req.baseUrl}/${redirect.location}`);
-					res.end();
+						if (error) {
+							handle_error(req, res, error.statusCode, error.message);
+							return;
+						}
 
-					return;
-				}
+						const serialized = {
+							preloaded: mod.preload && try_serialize(preloaded),
+							store: store && try_serialize(store.get())
+						};
+						Object.assign(props, preloaded);
 
-				if (error) {
-					handle_error(req, res, error.statusCode, error.message);
-					return;
-				}
+						const { html, head, css } = App.render({ Page: mod, props }, {
+							store
+						});
 
-				const serialized = {
-					preloaded: mod.preload && try_serialize(preloaded),
-					store: store && try_serialize(store.get())
-				};
-				Object.assign(data, preloaded);
+						let scripts = []
+							.concat(chunks.main) // chunks main might be an array. it might not! thanks, webpack
+							.filter(file => !file.match(/\.map$/))
+							.map(file => `<script src='${req.baseUrl}/client/${file}'></script>`)
+							.join('');
 
-				const { html, head, css } = mod.render(data, {
-					store
-				});
+						let inline_script = `__SAPPER__={${[
+							`baseUrl: "${req.baseUrl}"`,
+							serialized.preloaded && `preloaded: ${serialized.preloaded}`,
+							serialized.store && `store: ${serialized.store}`
+						].filter(Boolean).join(',')}};`;
 
-				let scripts = []
-					.concat(chunks.main) // chunks main might be an array. it might not! thanks, webpack
-					.filter(file => !file.match(/\.map$/))
-					.map(file => `<script src='${req.baseUrl}/client/${file}'></script>`)
-					.join('');
+						const has_service_worker = fs.existsSync(path.join(locations.dest(), 'service-worker.js'));
+						if (has_service_worker) {
+							inline_script += `if ('serviceWorker' in navigator) navigator.serviceWorker.register('${req.baseUrl}/service-worker.js');`;
+						}
 
-				let inline_script = `__SAPPER__={${[
-					`baseUrl: "${req.baseUrl}"`,
-					serialized.preloaded && `preloaded: ${serialized.preloaded}`,
-					serialized.store && `store: ${serialized.store}`
-				].filter(Boolean).join(',')}};`;
+						const page = template()
+							.replace('%sapper.base%', `<base href="${req.baseUrl}/">`)
+							.replace('%sapper.scripts%', `<script>${inline_script}</script>${scripts}`)
+							.replace('%sapper.html%', html)
+							.replace('%sapper.head%', `<noscript id='sapper-head-start'></noscript>${head}<noscript id='sapper-head-end'></noscript>`)
+							.replace('%sapper.styles%', (css && css.code ? `<style>${css.code}</style>` : ''));
 
-				const has_service_worker = fs.existsSync(path.join(locations.dest(), 'service-worker.js'));
-				if (has_service_worker) {
-					inline_script += `if ('serviceWorker' in navigator) navigator.serviceWorker.register('${req.baseUrl}/service-worker.js');`;
-				}
+						res.end(page);
 
-				const page = template()
-					.replace('%sapper.base%', `<base href="${req.baseUrl}/">`)
-					.replace('%sapper.scripts%', `<script>${inline_script}</script>${scripts}`)
-					.replace('%sapper.html%', html)
-					.replace('%sapper.head%', `<noscript id='sapper-head-start'></noscript>${head}<noscript id='sapper-head-end'></noscript>`)
-					.replace('%sapper.styles%', (css && css.code ? `<style>${css.code}</style>` : ''));
-
-				res.end(page);
-
-				if (process.send) {
-					process.send({
-						__sapper__: true,
-						url: req.url,
-						method: req.method,
-						status: 200,
-						type: 'text/html',
-						body: page
+						if (process.send) {
+							process.send({
+								__sapper__: true,
+								event: 'file',
+								url: req.url,
+								method: req.method,
+								status: 200,
+								type: 'text/html',
+								body: page
+							});
+						}
 					});
 				}
-			});
-		}
 
-		else {
-			const method = req.method.toLowerCase();
-			// 'delete' cannot be exported from a module because it is a keyword,
-			// so check for 'del' instead
-			const method_export = method === 'delete' ? 'del' : method;
-			const handler = mod[method_export];
-			if (handler) {
-				if (process.env.SAPPER_EXPORT) {
-					const { write, end, setHeader } = res;
-					const chunks: any[] = [];
-					const headers: Record<string, string> = {};
+				else {
+					const method = req.method.toLowerCase();
+					// 'delete' cannot be exported from a module because it is a keyword,
+					// so check for 'del' instead
+					const method_export = method === 'delete' ? 'del' : method;
+					const handle_method = mod[method_export];
+					if (handle_method) {
+						if (process.env.SAPPER_EXPORT) {
+							const { write, end, setHeader } = res;
+							const chunks: any[] = [];
+							const headers: Record<string, string> = {};
 
-					// intercept data so that it can be exported
-					res.write = function(chunk: any) {
-						chunks.push(new Buffer(chunk));
-						write.apply(res, arguments);
-					};
+							// intercept data so that it can be exported
+							res.write = function(chunk: any) {
+								chunks.push(new Buffer(chunk));
+								write.apply(res, arguments);
+							};
 
-					res.setHeader = function(name: string, value: string) {
-						headers[name.toLowerCase()] = value;
-						setHeader.apply(res, arguments);
-					};
+							res.setHeader = function(name: string, value: string) {
+								headers[name.toLowerCase()] = value;
+								setHeader.apply(res, arguments);
+							};
 
-					res.end = function(chunk?: any) {
-						if (chunk) chunks.push(new Buffer(chunk));
-						end.apply(res, arguments);
+							res.end = function(chunk?: any) {
+								if (chunk) chunks.push(new Buffer(chunk));
+								end.apply(res, arguments);
 
-						process.send({
-							__sapper__: true,
-							url: req.url,
-							method: req.method,
-							status: res.statusCode,
-							type: headers['content-type'],
-							body: Buffer.concat(chunks).toString()
-						});
-					};
-				}
+								process.send({
+									__sapper__: true,
+									event: 'file',
+									url: req.url,
+									method: req.method,
+									status: res.statusCode,
+									type: headers['content-type'],
+									body: Buffer.concat(chunks).toString()
+								});
+							};
+						}
 
-				const handle_bad_result = (err?: Error) => {
-					if (err) {
-						console.error(err.stack);
-						res.statusCode = 500;
-						res.end(err.message);
+						const handle_bad_result = (err?: Error) => {
+							if (err) {
+								console.error(err.stack);
+								res.statusCode = 500;
+								res.end(err.message);
+							} else {
+								process.nextTick(next);
+							}
+						};
+
+						try {
+							handle_method(req, res, handle_bad_result);
+						} catch (err) {
+							handle_bad_result(err);
+						}
 					} else {
-						handle_error(req, res, 404, 'Not found');
+						// no matching handler for method
+						process.nextTick(next);
 					}
-				};
-
-				try {
-					handler(req, res, handle_bad_result);
-				} catch (err) {
-					handle_bad_result(err);
 				}
-			} else {
-				// no matching handler for method — 404
-				handle_error(req, res, 404, 'Not found');
+			} catch (error) {
+				handle_error(req, res, 500, error);
 			}
 		}
+
+		next();
 	}
 
 	const not_found_route = routes.find((route: RouteObject) => route.error === '4xx');
@@ -349,39 +381,62 @@ function get_route_handler(chunks: Record<string, string>, routes: RouteObject[]
 			? not_found_route
 			: error_route;
 
-		const title: string = not_found
-			? 'Not found'
-			: `Internal server error: ${error.message}`;
+		function render_page({ head, css, html }) {
+			const page = template()
+				.replace('%sapper.base%', `<base href="${req.baseUrl}/">`)
+				.replace('%sapper.scripts%', `<script>__SAPPER__={baseUrl: "${req.baseUrl}"}</script><script src='${req.baseUrl}/client/${chunks.main}'></script>`)
+				.replace('%sapper.html%', html)
+				.replace('%sapper.head%', `<noscript id='sapper-head-start'></noscript>${head}<noscript id='sapper-head-end'></noscript>`)
+				.replace('%sapper.styles%', (css && css.code ? `<style>${css.code}</style>` : ''));
 
-		const rendered = route ? route.module.render({
-			status: statusCode,
-			error
-		}, {
-			store: store_getter && store_getter(req)
-		}) : { head: '', css: null, html: title };
+			res.end(page);
+		}
 
-		const { head, css, html } = rendered;
+		function handle_notfound() {
+			const title: string = not_found
+				? 'Not found'
+				: `Internal server error: ${error.message}`;
 
-		const page = template()
-			.replace('%sapper.base%', `<base href="${req.baseUrl}/">`)
-			.replace('%sapper.scripts%', `<script>__SAPPER__={baseUrl: "${req.baseUrl}"}</script><script src='${req.baseUrl}/client/${chunks.main}'></script>`)
-			.replace('%sapper.html%', html)
-			.replace('%sapper.head%', `<noscript id='sapper-head-start'></noscript>${head}<noscript id='sapper-head-end'></noscript>`)
-			.replace('%sapper.styles%', (css && css.code ? `<style>${css.code}</style>` : ''));
+			render_page({ head: '', css: null, html: title });
+		}
 
-		res.end(page);
+		if (route) {
+			const handlers = route.handlers[Symbol.iterator]();
+
+			function next() {
+				const { value: handler, done } = handlers.next();
+
+				if (done) {
+					handle_notfound();
+				} else if (handler.type === 'page') {
+					render_page(handler.module.render({
+						status: statusCode,
+						error
+					}, {
+						store: store_getter && store_getter(req)
+					}));
+				} else {
+					const handle_method = mod[method_export];
+					if (handle_method) {
+						handle_method(req, res, next);
+					} else {
+						next();
+					}
+				}
+			}
+
+			next();
+		} else {
+			handle_notfound();
+		}
 	}
 
 	return function find_route(req: Req, res: ServerResponse) {
-		try {
-			for (const route of routes) {
-				if (!route.error && route.pattern.test(req.path)) return handle_route(route, req, res);
-			}
-
-			handle_error(req, res, 404, 'Not found');
-		} catch (error) {
-			handle_error(req, res, 500, error);
+		for (const route of routes) {
+			if (!route.error && route.pattern.test(req.path)) return handle_route(route, req, res);
 		}
+
+		handle_error(req, res, 404, 'Not found');
 	};
 }
 
@@ -405,10 +460,6 @@ function compose_handlers(handlers: Handler[]) {
 	};
 }
 
-function read_json(file: string) {
-	return JSON.parse(fs.readFileSync(file, 'utf-8'));
-}
-
 function try_serialize(data: any) {
 	try {
 		return devalue(data);

src/runtime/index.ts

@@ -3,6 +3,7 @@ import { Component, ComponentConstructor, Params, Query, Route, RouteData, Scrol
 
 const manifest = typeof window !== 'undefined' && window.__SAPPER__;
 
+export let App: ComponentConstructor;
 export let component: Component;
 let target: Node;
 let store: Store;
@@ -27,10 +28,10 @@ function select_route(url: URL): Target {
 	if (url.origin !== window.location.origin) return null;
 	if (!url.pathname.startsWith(manifest.baseUrl)) return null;
 
-	const pathname = url.pathname.slice(manifest.baseUrl.length);
+	const path = url.pathname.slice(manifest.baseUrl.length);
 
 	for (const route of routes) {
-		const match = route.pattern.exec(pathname);
+		const match = route.pattern.exec(path);
 		if (match) {
 			if (route.ignore) return null;
 
@@ -43,18 +44,24 @@ function select_route(url: URL): Target {
 					query[key] = value || true;
 				})
 			}
-			return { url, route, data: { params, query } };
+			return { url, route, props: { params, query, path } };
 		}
 	}
 }
 
 let current_token: {};
 
-function render(Component: ComponentConstructor, data: any, scroll: ScrollPosition, token: {}) {
+function render(Page: ComponentConstructor, props: any, scroll: ScrollPosition, token: {}) {
 	if (current_token !== token) return;
 
+	const data = {
+		Page,
+		props,
+		preloading: false
+	};
+
 	if (component) {
-		component.destroy();
+		component.set(data);
 	} else {
 		// first load — remove SSR'd <head> contents
 		const start = document.querySelector('#sapper-head-start');
@@ -65,33 +72,39 @@ function render(Component: ComponentConstructor, data: any, scroll: ScrollPositi
 			detach(start);
 			detach(end);
 		}
-	}
 
-	component = new Component({
-		target,
-		data,
-		store,
-		hydrate: !component
-	});
+		component = new App({
+			target,
+			data,
+			store,
+			hydrate: true
+		});
+	}
 
 	if (scroll) {
 		window.scrollTo(scroll.x, scroll.y);
 	}
 }
 
-function prepare_route(Component: ComponentConstructor, data: RouteData) {
+function prepare_route(Page: ComponentConstructor, props: RouteData) {
 	let redirect: { statusCode: number, location: string } = null;
 	let error: { statusCode: number, message: Error | string } = null;
 
-	if (!Component.preload) {
-		return { Component, data, redirect, error };
+	if (!Page.preload) {
+		return { Page, props, redirect, error };
 	}
 
 	if (!component && manifest.preloaded) {
-		return { Component, data: Object.assign(data, manifest.preloaded), redirect, error };
+		return { Page, props: Object.assign(props, manifest.preloaded), redirect, error };
 	}
 
-	return Promise.resolve(Component.preload.call({
+	if (component) {
+		component.set({
+			preloading: true
+		});
+	}
+
+	return Promise.resolve(Page.preload.call({
 		store,
 		fetch: (url: string, opts?: any) => window.fetch(url, opts),
 		redirect: (statusCode: number, location: string) => {
@@ -100,7 +113,7 @@ function prepare_route(Component: ComponentConstructor, data: RouteData) {
 		error: (statusCode: number, message: Error | string) => {
 			error = { statusCode, message };
 		}
-	}, data)).catch(err => {
+	}, props)).catch(err => {
 		error = { statusCode: 500, message: err };
 	}).then(preloaded => {
 		if (error) {
@@ -108,15 +121,15 @@ function prepare_route(Component: ComponentConstructor, data: RouteData) {
 				? errors['4xx']
 				: errors['5xx'];
 
-			return route.load().then(({ default: Component }: { default: ComponentConstructor }) => {
+			return route.load().then(({ default: Page }: { default: ComponentConstructor }) => {
 				const err = error.message instanceof Error ? error.message : new Error(error.message);
-				Object.assign(data, { status: error.statusCode, error: err });
-				return { Component, data, redirect: null };
+				Object.assign(props, { status: error.statusCode, error: err });
+				return { Page, props, redirect: null };
 			});
 		}
 
-		Object.assign(data, preloaded)
-		return { Component, data, redirect };
+		Object.assign(props, preloaded)
+		return { Page, props, redirect };
 	});
 }
 
@@ -136,18 +149,18 @@ function navigate(target: Target, id: number) {
 
 	const loaded = prefetching && prefetching.href === target.url.href ?
 		prefetching.promise :
-		target.route.load().then(mod => prepare_route(mod.default, target.data));
+		target.route.load().then(mod => prepare_route(mod.default, target.props));
 
 	prefetching = null;
 
 	const token = current_token = {};
 
-	return loaded.then(({ Component, data, redirect }) => {
+	return loaded.then(({ Page, props, redirect }) => {
 		if (redirect) {
 			return goto(redirect.location, { replaceState: true });
 		}
 
-		render(Component, data, scroll_history[id], token);
+		render(Page, props, scroll_history[id], token);
 	});
 }
 
@@ -208,21 +221,30 @@ function handle_popstate(event: PopStateEvent) {
 
 let prefetching: {
 	href: string;
-	promise: Promise<{ Component: ComponentConstructor, data: any }>;
+	promise: Promise<{ Page: ComponentConstructor, props: any }>;
 } = null;
 
 export function prefetch(href: string) {
 	const selected = select_route(new URL(href, document.baseURI));
 
-	if (selected) {
+	if (selected && (!prefetching || href !== prefetching.href)) {
 		prefetching = {
 			href,
-			promise: selected.route.load().then(mod => prepare_route(mod.default, selected.data))
+			promise: selected.route.load().then(mod => prepare_route(mod.default, selected.props))
 		};
 	}
 }
 
-function handle_touchstart_mouseover(event: MouseEvent | TouchEvent) {
+let mousemove_timeout: NodeJS.Timer;
+
+function handle_mousemove(event: MouseEvent) {
+	clearTimeout(mousemove_timeout);
+	mousemove_timeout = setTimeout(() => {
+		trigger_prefetch(event);
+	}, 20);
+}
+
+function trigger_prefetch(event: MouseEvent | TouchEvent) {
 	const a: HTMLAnchorElement = <HTMLAnchorElement>findAnchor(<Node>event.target);
 	if (!a || a.rel !== 'prefetch') return;
 
@@ -231,12 +253,17 @@ function handle_touchstart_mouseover(event: MouseEvent | TouchEvent) {
 
 let inited: boolean;
 
-export function init(_target: Node, _routes: Route[], opts?: { store?: (data: any) => Store }) {
-	target = _target;
-	routes = _routes.filter(r => !r.error);
+export function init(opts: { App: ComponentConstructor, target: Node, routes: Route[], store?: (data: any) => Store }) {
+	if (opts instanceof HTMLElement) {
+		throw new Error(`The signature of init(...) has changed — see https://sapper.svelte.technology/guide#0-11-to-0-12 for more information`);
+	}
+
+	App = opts.App;
+	target = opts.target;
+	routes = opts.routes.filter(r => !r.error);
 	errors = {
-		'4xx': _routes.find(r => r.error === '4xx'),
-		'5xx': _routes.find(r => r.error === '5xx')
+		'4xx': opts.routes.find(r => r.error === '4xx'),
+		'5xx': opts.routes.find(r => r.error === '5xx')
 	};
 
 	if (opts && opts.store) {
@@ -248,8 +275,8 @@ export function init(_target: Node, _routes: Route[], opts?: { store?: (data: an
 		window.addEventListener('popstate', handle_popstate);
 
 		// prefetch
-		window.addEventListener('touchstart', handle_touchstart_mouseover);
-		window.addEventListener('mouseover', handle_touchstart_mouseover);
+		window.addEventListener('touchstart', trigger_prefetch);
+		window.addEventListener('mousemove', handle_mousemove);
 
 		inited = true;
 	}

src/runtime/interfaces.ts

@@ -3,11 +3,11 @@ import { Store } from '../interfaces';
 export { Store };
 export type Params = Record<string, string>;
 export type Query = Record<string, string | true>;
-export type RouteData = { params: Params, query: Query };
+export type RouteData = { params: Params, query: Query, path: string };
 
 export interface ComponentConstructor {
 	new (options: { target: Node, data: any, store: Store, hydrate: boolean }): Component;
-	preload: (data: { params: Params, query: Query }) => Promise<any>;
+	preload: (props: { params: Params, query: Query }) => Promise<any>;
 };
 
 export interface Component {
@@ -30,5 +30,5 @@ export type ScrollPosition = {
 export type Target = {
 	url: URL;
 	route: Route;
-	data: RouteData;
+	props: RouteData;
 };

test/app/app/App.html

@@ -0,0 +1,6 @@
+{#if preloading}
+	<progress class='preloading-progress' value=0.5/>
+{/if}
+
+<svelte:component this={Page} {...props}/>
+

test/app/app/client.js

@@ -1,9 +1,13 @@
 import { init, prefetchRoutes } from '../../../runtime.js';
 import { Store } from 'svelte/store.js';
 import { routes } from './manifest/client.js';
+import App from './App.html';
 
 window.init = () => {
-	return init(document.querySelector('#sapper'), routes, {
+	return init({
+		target: document.querySelector('#sapper'),
+		App,
+		routes,
 		store: data => new Store(data)
 	});
 };

test/app/app/server.js

@@ -5,6 +5,7 @@ import serve from 'serve-static';
 import sapper from '../../../dist/middleware.ts.js';
 import { Store } from 'svelte/store.js';
 import { routes } from './manifest/server.js';
+import App from './App.html'
 
 let pending;
 let ended;
@@ -86,6 +87,7 @@ const middlewares = [
 	},
 
 	sapper({
+		App,
 		routes,
 		store: () => {
 			return new Store({

test/app/routes/4xx.html

@@ -1,6 +1,6 @@
-<:Head>
-	<title>{{status}}</title>
-</:Head>
+<svelte:head>
+	<title>{status}</title>
+</svelte:head>
 
 <h1>Not found</h1>
-<p>{{error.message}}</p>
+<p>{error.message}</p>

test/app/routes/5xx.html

@@ -1,6 +1,6 @@
-<:Head>
+<svelte:head>
 	<title>Internal server error</title>
-</:Head>
+</svelte:head>
 
 <h1>Internal server error</h1>
-<p>{{error.message}}</p>
+<p>{error.message}</p>

test/app/routes/about.html

@@ -1,6 +1,6 @@
-<:Head>
+<svelte:head>
 	<title>About</title>
-</:Head>
+</svelte:head>
 
 <h1>About this site</h1>
 

test/app/routes/blog/[slug].html

@@ -1,11 +1,11 @@
-<:Head>
-	<title>{{post.title}}</title>
-</:Head>
+<svelte:head>
+	<title>{post.title}</title>
+</svelte:head>
 
-<h1>{{post.title}}</h1>
+<h1>{post.title}</h1>
 
 <div class='content'>
-	{{{post.html}}}
+	{@html post.html}
 </div>
 
 <script>

test/app/routes/blog/index.html

@@ -1,17 +1,17 @@
-<:Head>
+<svelte:head>
 	<title>Blog</title>
-</:Head>
+</svelte:head>
 
 <h1>Recent posts</h1>
 
 <ul>
-	{{#each posts as post}}
+	{#each posts as post}
 		<!-- we're using the non-standard `rel=prefetch` attribute to
 				tell Sapper to load the data for the page as soon as
 				the user hovers over the link or taps it, instead of
 				waiting for the 'click' event -->
-		<li><a rel='prefetch' href='blog/{{post.slug}}'>{{post.title}}</a></li>
-	{{/each}}
+		<li><a rel='prefetch' href='blog/{post.slug}'>{post.title}</a></li>
+	{/each}
 </ul>
 
 <script>

test/app/routes/credentials/index.html

@@ -1,4 +1,4 @@
-<h1>{{message}}</h1>
+<h1>{message}</h1>
 
 <script>
 	export default {

test/app/routes/index.html

@@ -1,6 +1,6 @@
-<:Head>
+<svelte:head>
 	<title>Sapper project template</title>
-</:Head>
+</svelte:head>
 
 <h1>Great success!</h1>
 
@@ -11,7 +11,7 @@
 <a href='blog/nope'>broken link</a>
 <a href='blog/throw-an-error'>error link</a>
 <a href='credentials?creds=include'>credentials</a>
-<a rel=prefetch class='{{page === "blog"  ? "selected" : ""}}' href='blog'>blog</a>
+<a rel=prefetch class='{page === "blog"  ? "selected" : ""}' href='blog'>blog</a>
 
 <div class='hydrate-test'></div>
 

test/app/routes/preload-values/custom-class.html

@@ -1,4 +1,4 @@
-<h1>{{foo.bar()}}</h1>
+<h1>{foo.bar()}</h1>
 
 <script>
 	export default {

test/app/routes/preload-values/set.html

@@ -1,4 +1,4 @@
-<h1>{{set.has('x')}}</h1>
+<h1>{set.has('x')}</h1>
 
 <script>
 	export default {

test/app/routes/show-url.html

@@ -1,4 +1,4 @@
-<p>URL is {{url}}</p>
+<p>URL is {url}</p>
 
 <script>
 	export default {

test/app/routes/store.html

@@ -1 +1 @@
-<h1>{{$title}}</h1>
+<h1>{$title}</h1>

test/common/test.js

@@ -1,3 +1,4 @@
+const fs = require('fs');
 const path = require('path');
 const assert = require('assert');
 const Nightmare = require('nightmare');
@@ -38,6 +39,7 @@ describe('sapper', function() {
 	rimraf.sync('export');
 	rimraf.sync('build');
 	rimraf.sync('.sapper');
+	rimraf.sync('start.js');
 
 	this.timeout(process.env.CI ? 30000 : 10000);
 
@@ -131,6 +133,7 @@ function run({ mode, basepath = '' }) {
 		let capture;
 
 		let base;
+		let captured_basepath;
 
 		const nightmare = new Nightmare();
 
@@ -148,7 +151,7 @@ function run({ mode, basepath = '' }) {
 
 		before(() => {
 			const promise = mode === 'production'
-				? exec(`node ${cli} build`).then(() => ports.find(3000))
+				? exec(`node ${cli} build -l`).then(() => ports.find(3000))
 				: ports.find(3000).then(port => {
 					exec(`node ${cli} dev`);
 					return ports.wait(port).then(() => port);
@@ -160,6 +163,10 @@ function run({ mode, basepath = '' }) {
 
 				const dir = mode === 'production' ? 'build' : '.sapper';
 
+				if (mode === 'production') {
+					assert.ok(fs.existsSync('build/index.js'));
+				}
+
 				proc = require('child_process').fork(`${dir}/server.js`, {
 					cwd: process.cwd(),
 					env: {
@@ -173,7 +180,13 @@ function run({ mode, basepath = '' }) {
 				let handler;
 
 				proc.on('message', message => {
-					if (message.__sapper__) return;
+					if (message.__sapper__) {
+						if (message.event === 'basepath') {
+							captured_basepath = basepath;
+						}
+						return;
+					}
+
 					if (handler) handler(message);
 				});
 
@@ -301,14 +314,17 @@ function run({ mode, basepath = '' }) {
 					});
 			});
 
-			it('reuses prefetch promise', () => {
+			it.skip('reuses prefetch promise', () => {
 				return nightmare
 					.goto(`${base}/blog`)
 					.init()
 					.then(() => {
 						return capture(() => {
 							return nightmare
-								.mouseover('[href="blog/what-is-sapper"]')
+								.evaluate(() => {
+									const a = document.querySelector('[href="blog/what-is-sapper"]');
+									a.dispatchEvent(new MouseEvent('mousemove'));
+								})
 								.wait(200);
 						});
 					})
@@ -565,6 +581,33 @@ function run({ mode, basepath = '' }) {
 					assert.ok(html.indexOf('service-worker.js') !== -1);
 				});
 			});
+
+			it('sets preloading true when appropriate', () => {
+				return nightmare
+					.goto(base)
+					.init()
+					.click('a[href="slow-preload"]')
+					.wait(100)
+					.evaluate(() => {
+						const progress = document.querySelector('progress');
+						return !!progress;
+					})
+					.then(hasProgressIndicator => {
+						assert.ok(hasProgressIndicator);
+					})
+					.then(() => nightmare.evaluate(() => window.fulfil()))
+					.then(() => nightmare.evaluate(() => {
+						const progress = document.querySelector('progress');
+						return !!progress;
+					}))
+					.then(hasProgressIndicator => {
+						assert.ok(!hasProgressIndicator);
+					});
+			});
+
+			it('emits a basepath', () => {
+				assert.equal(captured_basepath, basepath);
+			});
 		});
 
 		describe('headers', () => {

test/unit/create_routes.test.js

@@ -2,7 +2,29 @@ const assert = require('assert');
 const { create_routes } = require('../../dist/core.ts.js');
 
 describe('create_routes', () => {
-	it('encodes caharcters not allowed in path', () => {
+	it('sorts handlers correctly', () => {
+		const routes = create_routes({
+			files: ['foo.html', 'foo.js']
+		});
+
+		assert.deepEqual(
+			routes.map(r => r.handlers),
+			[
+				[
+					{
+						type: 'route',
+						file: 'foo.js'
+					},
+					{
+						type: 'page',
+						file: 'foo.html'
+					}
+				]
+			]
+		)
+	});
+
+	it('encodes characters not allowed in path', () => {
 		const routes = create_routes({
 			files: [
 				'"',
@@ -27,7 +49,7 @@ describe('create_routes', () => {
 		});
 
 		assert.deepEqual(
-			routes.map(r => r.file),
+			routes.map(r => r.handlers[0].file),
 			[
 				'index.html',
 				'about.html',
@@ -59,7 +81,7 @@ describe('create_routes', () => {
 		});
 
 		assert.deepEqual(
-			routes.map(r => r.file),
+			routes.map(r => r.handlers[0].file),
 			[
 				'4xx.html',
 				'5xx.html',
@@ -95,7 +117,7 @@ describe('create_routes', () => {
 		});
 
 		assert.deepEqual(
-			routes.map(r => r.file),
+			routes.map(r => r.handlers[0].file),
 			[
 				'4xx.html',
 				'5xx.html',
@@ -125,7 +147,7 @@ describe('create_routes', () => {
 		for (let i = 0; i < routes.length; i += 1) {
 			const route = routes[i];
 			if (params = route.exec('/post/123')) {
-				file = route.file;
+				file = route.handlers[0].file;
 				break;
 			}
 		}
@@ -142,7 +164,7 @@ describe('create_routes', () => {
 		});
 
 		assert.deepEqual(
-			routes.map(r => r.file),
+			routes.map(r => r.handlers[0].file),
 			[
 				'index.html',
 				'e/f/g/h.html'
@@ -150,6 +172,17 @@ describe('create_routes', () => {
 		);
 	});
 
+	it('ignores files and directories with leading dots except .well-known', () => {
+		const routes = create_routes({
+			files: ['.well-known', '.unknown']
+		});
+
+		assert.deepEqual(
+			routes.map(r => r.handlers[0].file),
+			['.well-known']
+		);
+	});
+
 	it('matches /foo/:bar before /:baz/qux', () => {
 		const a = create_routes({
 			files: ['foo/[bar].html', '[baz]/qux.html']
@@ -159,12 +192,12 @@ describe('create_routes', () => {
 		});
 
 		assert.deepEqual(
-			a.map(r => r.file),
+			a.map(r => r.handlers[0].file),
 			['foo/[bar].html', '[baz]/qux.html']
 		);
 
 		assert.deepEqual(
-			b.map(r => r.file),
+			b.map(r => r.handlers[0].file),
 			['foo/[bar].html', '[baz]/qux.html']
 		);
 	});
@@ -174,13 +207,7 @@ describe('create_routes', () => {
 			create_routes({
 				files: ['[foo].html', '[bar]/index.html']
 			});
-		}, /The \[foo\].html and \[bar\]\/index.html routes clash/);
-
-		assert.throws(() => {
-			create_routes({
-				files: ['foo.html', 'foo.js']
-			});
-		}, /The foo.html and foo.js routes clash/);
+		}, /The \[foo\] and \[bar\]\/index routes clash/);
 	});
 
 	it('matches nested routes', () => {
@@ -203,7 +230,7 @@ describe('create_routes', () => {
 		});
 
 		assert.deepEqual(
-			routes.map(r => r.file),
+			routes.map(r => r.handlers[0].file),
 			['settings.html', 'settings/[submenu].html']
 		);
 	});