-> v0.22.10

no need to use basepath in <link>

.gitignore

@@ -4,10 +4,12 @@ yarn-error.log
 node_modules
 cypress/screenshots
 test/app/.sapper
-test/app/app/manifest
+test/app/src/manifest
+__sapper__
 test/app/export
 test/app/build
 sapper
 runtime.js
 dist
-!rollup.config.js
+!rollup.config.js
+templates/*.js

.travis.yml

@@ -18,4 +18,4 @@ addons:
 install:
   - export DISPLAY=':99.0'
   - Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
-  - npm install
+  - npm ci || npm i

CHANGELOG.md

@@ -1,5 +1,198 @@
 # sapper changelog
 
+## 0.22.10
+
+* Handle `sapper-noscroll` attribute on `<a>` elements ([#376](https://github.com/sveltejs/sapper/issues/376))
+* Fix CSS paths when using a base path ([#466](https://github.com/sveltejs/sapper/pull/466))
+
+## 0.22.9
+
+* Fix legacy builds ([#462](https://github.com/sveltejs/sapper/pull/462))
+
+## 0.22.8
+
+* Ensure CSS placeholders are overwritten ([#462](https://github.com/sveltejs/sapper/pull/462))
+
+## 0.22.7
+
+* Fix cookies ([#460](https://github.com/sveltejs/sapper/pull/460))
+
+## 0.22.6
+
+* Normalise chunk filenames on Windows ([#456](https://github.com/sveltejs/sapper/pull/456))
+* Load modules with credentials ([#458](https://github.com/sveltejs/sapper/pull/458))
+
+## 0.22.5
+
+* Fix `sapper dev`. Oops.
+
+## 0.22.4
+
+* Ensure launcher does not overwrite a module ([#455](https://github.com/sveltejs/sapper/pull/455))
+
+## 0.22.3
+
+* Prevent server from accidentally importing dev client
+
+## 0.22.2
+
+* Make paths in generated code relative to project
+
+## 0.22.1
+
+* Fix `pkg.files`
+
+## 0.22.0
+
+* Move generated files into `__sapper__` ([#453](https://github.com/sveltejs/sapper/pull/453))
+* Change default build and export directories to `__sapper__/build` and `__sapper__/export` ([#453](https://github.com/sveltejs/sapper/pull/453))
+
+## 0.21.1
+
+* Read template from build directory in production
+
+## 0.21.0
+
+* Change project folder structure ([#432](https://github.com/sveltejs/sapper/issues/432))
+* Escape filenames ([#446](https://github.com/sveltejs/sapper/pull/446/))
+
+## 0.20.4
+
+* Fix legacy build CSS ([#439](https://github.com/sveltejs/sapper/issues/439))
+* Enable debugging in Chrome and VSCode ([#435](https://github.com/sveltejs/sapper/issues/435))
+
+## 0.20.3
+
+* Inject `nonce` attribute if `res.locals.nonce` is present ([#424](https://github.com/sveltejs/sapper/pull/424))
+* Prevent service worker caching ([#428](https://github.com/sveltejs/sapper/pull/428))
+* Consistent caching for HTML responses ([#429](https://github.com/sveltejs/sapper/pull/429))
+
+## 0.20.2
+
+* Add `immutable` cache control header for hashed assets ([#425](https://github.com/sveltejs/sapper/pull/425))
+* Handle value-less query string params ([#426](https://github.com/sveltejs/sapper/issues/426))
+
+## 0.20.1
+
+* Update shimport
+
+## 0.20.0
+
+* Decode `req.params` and `req.query` ([#417](https://github.com/sveltejs/sapper/issues/417))
+* Decode URLs before writing files in `sapper export` ([#414](https://github.com/sveltejs/sapper/pull/414))
+* Generate server sourcemaps for Rollup apps in dev mode ([#418](https://github.com/sveltejs/sapper/pull/418))
+
+## 0.19.3
+
+* Better unicode route handling ([#347](https://github.com/sveltejs/sapper/issues/347))
+
+## 0.19.2
+
+* Ignore editor tmp files ([#220](https://github.com/sveltejs/sapper/issues/220))
+* Ignore clicks an `<a>` element without `href` ([#235](https://github.com/sveltejs/sapper/issues/235))
+* Allow routes that are reserved JavaScript words ([#315](https://github.com/sveltejs/sapper/issues/315))
+* Print out webpack errors ([#403](https://github.com/sveltejs/sapper/issues/403))
+
+## 0.19.1
+
+* Don't include local origin in export redirects ([#409](https://github.com/sveltejs/sapper/pull/409))
+
+## 0.19.0
+
+* Extract styles out of JS into .css files, for Rollup apps ([#388](https://github.com/sveltejs/sapper/issues/388))
+* Fix `prefetchRoutes` ([#380](https://github.com/sveltejs/sapper/issues/380))
+
+## 0.18.7
+
+* Support differential bundling for Rollup apps via a `--legacy` flag ([#280](https://github.com/sveltejs/sapper/issues/280))
+
+## 0.18.6
+
+* Bundle missing dependency
+
+## 0.18.5
+
+* Bugfix
+
+## 0.18.4
+
+* Handle non-Sapper responses when exporting ([#382](https://github.com/sveltejs/sapper/issues/392))
+* Add `--dev-port` flag to `sapper dev` ([#381](https://github.com/sveltejs/sapper/issues/381))
+
+## 0.18.3
+
+* Fix service worker Rollup build config
+
+## 0.18.2
+
+* Update `pkg.files`
+
+## 0.18.1
+
+* Add live reloading ([#385](https://github.com/sveltejs/sapper/issues/385))
+
+## 0.18.0
+
+* Rollup support ([#379](https://github.com/sveltejs/sapper/pull/379))
+* Fail `export` if a page times out (configurable with `--timeout`) ([#378](https://github.com/sveltejs/sapper/pull/378))
+
+## 0.17.1
+
+* Print which file is causing build errors/warnings ([#371](https://github.com/sveltejs/sapper/pull/371))
+
+## 0.17.0
+
+* Use `cheap-watch` instead of `chokidar` ([#364](https://github.com/sveltejs/sapper/issues/364))
+
+## 0.16.1
+
+* Fix file watching regression in previous version
+
+## 0.16.0
+
+* Slim down installed package ([#363](https://github.com/sveltejs/sapper/pull/363))
+
+## 0.15.8
+
+* Only set `preloading: true` on navigation, not prefetch ([#352](https://github.com/sveltejs/sapper/issues/352))
+* Provide fallback for missing preload errors ([#361](https://github.com/sveltejs/sapper/pull/361))
+
+## 0.15.7
+
+* Strip leading slash from redirects ([#291](https://github.com/sveltejs/sapper/issues/291))
+* Pass `(req, res)` to store getter ([#344](https://github.com/sveltejs/sapper/issues/344))
+
+## 0.15.6
+
+* Fix exporting with custom basepath ([#342](https://github.com/sveltejs/sapper/pull/342))
+
+## 0.15.5
+
+* Faster `export` with more explanatory output ([#335](https://github.com/sveltejs/sapper/pull/335))
+* Only blur `activeElement` if it exists ([#332](https://github.com/sveltejs/sapper/issues/332))
+* Don't emit `client_info.json` or `server_info.json` ([#318](https://github.com/sveltejs/sapper/issues/318))
+
+## 0.15.4
+
+* Add `ignore` option ([#326](https://github.com/sveltejs/sapper/pull/326))
+
+## 0.15.3
+
+* Crawl pages in parallel when exporting ([#329](https://github.com/sveltejs/sapper/pull/329))
+* Don't minify inline JS when exporting ([#328](https://github.com/sveltejs/sapper/pull/328))
+
+## 0.15.2
+
+* Collapse component chains where no intermediate layout component is specified ([#312](https://github.com/sveltejs/sapper/issues/312))
+
+## 0.15.1
+
+* Prevent confusing error when no root layout is specified
+
+## 0.15.0
+
+* Nested routes (consult [migration guide](https://sapper.svelte.technology/guide#0-14-to-0-15) and docs on [layouts](https://sapper.svelte.technology/guide#layouts)) ([#262](https://github.com/sveltejs/sapper/issues/262))
+
 ## 0.14.2
 
 * Prevent unsafe replacements ([#307](https://github.com/sveltejs/sapper/pull/307))

README.md

@@ -31,6 +31,44 @@ npm run build
 npm start
 ```
 
+## Development
+
+Pull requests are encouraged and always welcome. [Pick an issue](https://github.com/sveltejs/sapper/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc) and help us out!
+
+To install and work on Sapper locally:
+
+```bash
+git clone git@github.com:sveltejs/sapper.git
+cd sapper
+npm install
+npm run dev
+```
+
+### Linking to a Live Project
+
+You can make changes locally to Sapper and test it against a local Sapper project. For a quick project that takes almost no setup, use the default [sapper-template](https://github.com/sveltejs/sapper-template) project. Instruction on setup are found in that project repository.
+
+To link Sapper to your project, from the root of your local Sapper git checkout:
+
+```bash
+cd sapper
+npm link
+```
+
+Then, to link from `sapper-template` (or any other given project):
+
+```bash
+cd sapper-template
+npm link sapper
+```
+
+You should be good to test changes locally.
+
+### Running Tests
+
+```bash
+npm run test
+```
 
 ## License
 

api.js

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

appveyor.yml

@@ -10,11 +10,11 @@ build: off
 environment:
   matrix:
     # node.js
-    - nodejs_version: stable
+    - nodejs_version: 10.5
 
 install:
   - ps: Install-Product node $env:nodejs_version
-  - npm install
+  - npm ci
 
 test_script:
   - node --version && npm --version

config/rollup.js

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

config/webpack.js

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

index.js

@@ -0,0 +1 @@
+throw new Error(`As of Sapper 0.22, you should not import 'sapper' directly. See https://sapper.svelte.technology/guide#0-21-to-0-22 for more information`);

mocha.opts

@@ -1,4 +1,5 @@
 --require source-map-support/register
+--require ts-node/register
 --recursive
-test/unit/**/*.js
+test/unit/*/*.ts
 test/common/test.js

package.json

@@ -1,73 +1,79 @@
 {
   "name": "sapper",
-  "version": "0.14.2",
+  "version": "0.22.10",
   "description": "Military-grade apps, engineered by Svelte",
-  "main": "dist/middleware.ts.js",
   "bin": {
     "sapper": "./sapper"
   },
   "files": [
     "*.js",
-    "*.ts.js",
-    "runtime",
     "webpack",
+    "config",
     "sapper",
-    "dist"
+    "dist/*.js",
+    "templates/*.js"
   ],
   "directories": {
     "test": "test"
   },
   "dependencies": {
-    "ansi-colors": "^2.0.1",
-    "cheerio": "^1.0.0-rc.2",
-    "chokidar": "^2.0.3",
-    "cookie": "^0.3.1",
-    "devalue": "^1.0.1",
-    "glob": "^7.1.2",
     "html-minifier": "^3.5.16",
-    "mkdirp": "^0.5.1",
-    "node-fetch": "^2.1.1",
-    "port-authority": "^1.0.2",
-    "pretty-bytes": "^5.0.0",
-    "pretty-ms": "^3.1.0",
-    "require-relative": "^0.8.7",
-    "rimraf": "^2.6.2",
-    "sade": "^1.4.1",
-    "sander": "^0.6.0",
+    "shimport": "0.0.11",
     "source-map-support": "^0.5.6",
-    "tslib": "^1.9.1",
-    "url-parse": "^1.2.0",
-    "webpack-format-messages": "^2.0.1"
+    "sourcemap-codec": "^1.4.1",
+    "string-hash": "^1.1.3",
+    "tslib": "^1.9.1"
   },
   "devDependencies": {
     "@types/glob": "^5.0.34",
     "@types/mkdirp": "^0.5.2",
+    "@types/mocha": "^5.2.5",
+    "@types/node": "^10.7.1",
     "@types/rimraf": "^2.0.2",
+    "agadoo": "^1.0.1",
+    "cheap-watch": "^0.3.0",
     "compression": "^1.7.1",
+    "cookie": "^0.3.1",
+    "devalue": "^1.0.4",
     "eslint": "^4.13.1",
     "eslint-plugin-import": "^2.12.0",
     "express": "^4.16.3",
+    "kleur": "^2.0.1",
+    "mkdirp": "^0.5.1",
     "mocha": "^5.2.0",
     "nightmare": "^3.0.0",
+    "node-fetch": "^2.1.1",
     "npm-run-all": "^4.1.3",
     "polka": "^0.4.0",
-    "rollup": "^0.59.2",
+    "port-authority": "^1.0.5",
+    "pretty-bytes": "^5.0.0",
+    "pretty-ms": "^3.1.0",
+    "require-relative": "^0.8.7",
+    "rimraf": "^2.6.2",
+    "rollup": "^0.65.0",
     "rollup-plugin-commonjs": "^9.1.3",
     "rollup-plugin-json": "^3.0.0",
+    "rollup-plugin-node-resolve": "^3.3.0",
     "rollup-plugin-string": "^2.0.2",
     "rollup-plugin-typescript": "^0.8.1",
+    "sade": "^1.4.1",
+    "sander": "^0.6.0",
     "serve-static": "^1.13.2",
     "svelte": "^2.6.3",
     "svelte-loader": "^2.9.0",
+    "tiny-glob": "^0.2.2",
+    "ts-node": "^7.0.1",
     "typescript": "^2.8.3",
     "walk-sync": "^0.3.2",
-    "webpack": "^4.8.3"
+    "webpack": "^4.8.3",
+    "webpack-format-messages": "^2.0.1"
   },
   "scripts": {
     "cy:open": "cypress open",
     "test": "mocha --opts mocha.opts",
     "pretest": "npm run build",
-    "build": "rollup -c",
+    "build": "rm -rf dist && rollup -c",
+    "prepare": "npm run build",
     "dev": "rollup -cw",
     "prepublishOnly": "npm test",
     "update_mime_types": "curl http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types | grep -e \"^[^#]\" > src/middleware/mime-types.md"

rollup.config.js

@@ -1,8 +1,10 @@
 import typescript from 'rollup-plugin-typescript';
 import string from 'rollup-plugin-string';
 import json from 'rollup-plugin-json';
+import resolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
 import pkg from './package.json';
+import { builtinModules } from 'module';
 
 const external = [].concat(
 	Object.keys(pkg.dependencies),
@@ -10,26 +12,38 @@ const external = [].concat(
 	'sapper/core.js'
 );
 
-export default [
-	{
-		input: `src/runtime/index.ts`,
+function template(kind, external) {
+	return {
+		input: `templates/src/${kind}/index.ts`,
 		output: {
-			file: `runtime.js`,
+			file: `templates/${kind}.js`,
 			format: 'es'
 		},
+		external,
 		plugins: [
+			resolve(),
+			commonjs(),
+			string({
+				include: '**/*.md'
+			}),
 			typescript({
-				typescript: require('typescript')
+				typescript: require('typescript'),
+				target: "ES2017"
 			})
 		]
-	},
+	};
+}
+
+export default [
+	template('client', ['__ROOT__', '__ERROR__']),
+	template('server', builtinModules),
 
 	{
 		input: [
 			`src/api.ts`,
 			`src/cli.ts`,
 			`src/core.ts`,
-			`src/middleware.ts`,
+			`src/rollup.ts`,
 			`src/webpack.ts`
 		],
 		output: {
@@ -39,16 +53,13 @@ export default [
 		},
 		external,
 		plugins: [
-			string({
-				include: '**/*.md'
-			}),
 			json(),
+			resolve(),
 			commonjs(),
 			typescript({
 				typescript: require('typescript')
 			})
 		],
-		experimentalCodeSplitting: true,
-		experimentalDynamicImport: true
+		experimentalCodeSplitting: true
 	}
 ];

runtime/README.md

@@ -1 +0,0 @@
-This directory exists for legacy reasons and should be deleted before releasing version 1.

runtime/app.js

@@ -1,2 +0,0 @@
-console.error('sapper/runtime/app.js has been deprecated in favour of sapper/runtime.js');
-export * from '../runtime.js';

sapper

@@ -1,2 +1,2 @@
 #!/usr/bin/env node
-require('./dist/cli.ts.js');
+require('./dist/cli.js');

sapper-dev-client.js

@@ -1,6 +1,8 @@
 let source;
 
 function check() {
+	if (typeof module === 'undefined') return;
+
 	if (module.hot.status() === 'idle') {
 		module.hot.check(true).then(modules => {
 			console.log(`[SAPPER] applied HMR update`);

src/api/build.ts

@@ -3,15 +3,22 @@ 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 minify_html from './utils/minify_html';
+import { create_compilers, create_main_manifests, create_manifest_data, create_serviceworker_manifest } from '../core';
 import * as events from './interfaces';
+import { copy_shimport } from './utils/copy_shimport';
+import { Dirs } from '../interfaces';
+import read_template from '../core/read_template';
 
-export function build(opts: {}) {
+type Opts = {
+	legacy: boolean;
+	bundler: 'rollup' | 'webpack';
+};
+
+export function build(opts: Opts, dirs: Dirs) {
 	const emitter = new EventEmitter();
 
-	execute(emitter, opts).then(
+	execute(emitter, opts, dirs).then(
 		() => {
 			emitter.emit('done', <events.DoneEvent>{}); // TODO do we need to pass back any info?
 		},
@@ -25,18 +32,14 @@ export function build(opts: {}) {
 	return emitter;
 }
 
-async function execute(emitter: EventEmitter, {
-	dest = 'build',
-	app = 'app',
-	webpack = 'webpack',
-	routes = 'routes'
-} = {}) {
-	mkdirp.sync(dest);
-	rimraf.sync(path.join(dest, '**/*'));
+async function execute(emitter: EventEmitter, opts: Opts, dirs: Dirs) {
+	rimraf.sync(path.join(dirs.dest, '**/*'));
+	mkdirp.sync(`${dirs.dest}/client`);
+	copy_shimport(dirs.dest);
 
-	// minify app/template.html
+	// minify src/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');
+	const template = read_template();
 
 	// remove this in a future version
 	if (template.indexOf('%sapper.base%') === -1) {
@@ -45,67 +48,64 @@ async function execute(emitter: EventEmitter, {
 		throw error;
 	}
 
-	fs.writeFileSync(`${dest}/template.html`, minify_html(template));
+	fs.writeFileSync(`${dirs.dest}/template.html`, minify_html(template));
 
-	const route_objects = create_routes();
+	const manifest_data = create_manifest_data();
 
-	// create app/manifest/client.js and app/manifest/server.js
-	create_main_manifests({ routes: route_objects });
+	// create src/manifest/client.js and src/manifest/server.js
+	create_main_manifests({ bundler: opts.bundler, manifest_data });
 
-	const { client, server, serviceworker } = create_compilers({ webpack });
+	const { client, server, serviceworker } = await create_compilers(opts.bundler);
 
-	const client_stats = await compile(client);
+	const client_result = await client.compile();
 	emitter.emit('build', <events.BuildEvent>{
 		type: 'client',
 		// TODO duration/warnings
-		webpack_stats: client_stats
+		result: client_result
 	});
 
-	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 build_info = client_result.to_json(manifest_data, dirs);
 
-	const server_stats = await compile(server);
+	if (opts.legacy) {
+		process.env.SAPPER_LEGACY_BUILD = 'true';
+		const { client } = await create_compilers(opts.bundler);
+
+		const client_result = await client.compile();
+
+		emitter.emit('build', <events.BuildEvent>{
+			type: 'client (legacy)',
+			// TODO duration/warnings
+			result: client_result
+		});
+
+		client_result.to_json(manifest_data, dirs);
+		build_info.legacy_assets = client_result.assets;
+		delete process.env.SAPPER_LEGACY_BUILD;
+	}
+
+	fs.writeFileSync(path.join(dirs.dest, 'build.json'), JSON.stringify(build_info));
+
+	const server_stats = await server.compile();
 	emitter.emit('build', <events.BuildEvent>{
 		type: 'server',
 		// TODO duration/warnings
-		webpack_stats: server_stats
+		result: server_stats
 	});
 
 	let serviceworker_stats;
 
 	if (serviceworker) {
 		create_serviceworker_manifest({
-			routes: route_objects,
-			client_files: client_stats.toJson().assets.map((chunk: { name: string }) => `client/${chunk.name}`)
+			manifest_data,
+			client_files: client_result.chunks.map(chunk => `client/${chunk.file}`)
 		});
 
-		serviceworker_stats = await compile(serviceworker);
+		serviceworker_stats = await serviceworker.compile();
 
 		emitter.emit('build', <events.BuildEvent>{
 			type: 'serviceworker',
 			// TODO duration/warnings
-			webpack_stats: serviceworker_stats
+			result: 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

@@ -5,33 +5,44 @@ 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 { create_manifest_data, create_main_manifests, create_compilers, create_serviceworker_manifest } from '../core';
+import { Compiler, Compilers } from '../core/create_compilers';
+import { CompileResult, CompileError } from '../core/create_compilers/interfaces';
+import Deferred from './utils/Deferred';
 import * as events from './interfaces';
+import validate_bundler from '../cli/utils/validate_bundler';
+import { copy_shimport } from './utils/copy_shimport';
+import { ManifestData } from '../interfaces';
+import read_template from '../core/read_template';
 
 export function dev(opts) {
 	return new Watcher(opts);
 }
 
 class Watcher extends EventEmitter {
+	bundler: string;
 	dirs: {
-		app: string;
+		src: string;
 		dest: string;
 		routes: string;
+		rollup: string;
 		webpack: string;
 	}
 	port: number;
 	closed: boolean;
 
+	dev_port: number;
+	live: boolean;
+	hot: boolean;
+
+	devtools_port: number;
+
 	dev_server: DevServer;
 	proc: child_process.ChildProcess;
 	filewatchers: Array<{ close: () => void }>;
-	deferreds: {
-		client: Deferred;
-		server: Deferred;
-	};
+	deferred: Deferred;
 
 	crashed: boolean;
 	restarting: boolean;
@@ -43,24 +54,43 @@ class Watcher extends EventEmitter {
 	}
 
 	constructor({
-		app = locations.app(),
+		src = locations.src(),
 		dest = locations.dest(),
 		routes = locations.routes(),
+		'dev-port': dev_port,
+		live,
+		hot,
+		'devtools-port': devtools_port,
+		bundler,
 		webpack = 'webpack',
+		rollup = 'rollup',
 		port = +process.env.PORT
 	}: {
-		app: string,
+		src: string,
 		dest: string,
 		routes: string,
+		'dev-port': number,
+		live: boolean,
+		hot: boolean,
+		'devtools-port': number,
+		bundler?: string,
 		webpack: string,
+		rollup: string,
 		port: number
 	}) {
 		super();
 
-		this.dirs = { app, dest, routes, webpack };
+		this.bundler = validate_bundler(bundler);
+		this.dirs = { src, dest, routes, webpack, rollup };
 		this.port = port;
 		this.closed = false;
 
+		this.dev_port = dev_port;
+		this.live = live;
+		this.hot = hot;
+
+		this.devtools_port = devtools_port;
+
 		this.filewatchers = [];
 
 		this.current_build = {
@@ -71,7 +101,7 @@ class Watcher extends EventEmitter {
 		};
 
 		// remove this in a future version
-		const template = fs.readFileSync(path.join(app, 'template.html'), 'utf-8');
+		const template = read_template();
 		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`;
@@ -101,35 +131,62 @@ class Watcher extends EventEmitter {
 
 		const { dest } = this.dirs;
 		rimraf.sync(dest);
-		mkdirp.sync(dest);
+		mkdirp.sync(`${dest}/client`);
+		if (this.bundler === 'rollup') copy_shimport(dest);
 
-		const dev_port = await ports.find(10000);
+		if (!this.dev_port) this.dev_port = await ports.find(10000);
 
-		const routes = create_routes();
-		create_main_manifests({ routes, dev_port });
+		// Chrome looks for debugging targets on ports 9222 and 9229 by default
+		if (!this.devtools_port) this.devtools_port = await ports.find(9222);
 
-		this.dev_server = new DevServer(dev_port);
+		let manifest_data: ManifestData;
+
+		try {
+			manifest_data = create_manifest_data();
+			create_main_manifests({ bundler: this.bundler, manifest_data, dev_port: this.dev_port });
+		} catch (err) {
+			this.emit('fatal', <events.FatalEvent>{
+				message: err.message
+			});
+			return;
+		}
+
+		this.dev_server = new DevServer(this.dev_port);
 
 		this.filewatchers.push(
-			watch_files(locations.routes(), ['add', 'unlink'], () => {
-				const routes = create_routes();
-				create_main_manifests({ routes, dev_port });
-			}),
+			watch_dir(
+				locations.routes(),
+				({ path: file, stats }) => {
+					if (stats.isDirectory()) {
+						return path.basename(file)[0] !== '_';
+					}
+					return true;
+				},
+				() => {
+					try {
+						const new_manifest_data = create_manifest_data();
+						create_main_manifests({ bundler: this.bundler, manifest_data, dev_port: this.dev_port });
 
-			watch_files(`${locations.app()}/template.html`, ['change'], () => {
+						manifest_data = new_manifest_data;
+					} catch (err) {
+						this.emit('error', <events.ErrorEvent>{
+							message: err.message
+						});
+					}
+				}
+			),
+
+			fs.watch(`${locations.src()}/template.html`, () => {
 				this.dev_server.send({
 					action: 'reload'
 				});
 			})
 		);
 
-		this.deferreds = {
-			server: new Deferred(),
-			client: new Deferred()
-		};
+		let deferred = new Deferred();
 
 		// TODO watch the configs themselves?
-		const compilers = create_compilers({ webpack: this.dirs.webpack });
+		const compilers: Compilers = await create_compilers(this.bundler, this.dirs);
 
 		let log = '';
 
@@ -148,13 +205,10 @@ class Watcher extends EventEmitter {
 
 			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(() => {
+			handle_result: (result: CompileResult) => {
+				deferred.promise.then(() => {
 					const restart = () => {
 						log = '';
 						this.crashed = false;
@@ -166,11 +220,15 @@ class Watcher extends EventEmitter {
 									process: this.proc
 								});
 
-								this.deferreds.server.fulfil();
-
-								this.dev_server.send({
-									status: 'completed'
-								});
+								if (this.hot && this.bundler === 'webpack') {
+									this.dev_server.send({
+										status: 'completed'
+									});
+								} else {
+									this.dev_server.send({
+										action: 'reload'
+									});
+								}
 							}))
 							.catch(err => {
 								if (this.crashed) return;
@@ -190,12 +248,21 @@ class Watcher extends EventEmitter {
 						restart();
 					}
 
-					this.proc = child_process.fork(`${dest}/server.js`, [], {
+					// we need to give the child process its own DevTools port,
+					// otherwise Node will try to use the parent's (and fail)
+					const debugArgRegex = /--inspect(?:-brk|-port)?|--debug-port/;
+					const execArgv = process.execArgv.slice();
+					if (execArgv.some((arg: string) => !!arg.match(debugArgRegex))) {
+						execArgv.push(`--inspect-port=${this.devtools_port}`);
+					}
+
+					this.proc = child_process.fork(`${dest}/server/server.js`, [], {
 						cwd: process.cwd(),
 						env: Object.assign({
 							PORT: this.port
 						}, process.env),
-						stdio: ['ipc']
+						stdio: ['ipc'],
+						execArgv
 					});
 
 					this.proc.stdout.on('data', chunk => {
@@ -221,32 +288,35 @@ class Watcher extends EventEmitter {
 			}
 		});
 
-		let first = true;
-
 		this.watch(compilers.client, {
 			name: 'client',
 
 			invalid: filename => {
 				this.restart(filename, 'client');
-				this.deferreds.client = new Deferred();
+				deferred = 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();
+			handle_result: (result: CompileResult) => {
+				fs.writeFileSync(
+					path.join(dest, 'build.json'),
 
-				const client_files = info.assets.map((chunk: { name: string }) => `client/${chunk.name}`);
+					// TODO should be more explicit that to_json has effects
+					JSON.stringify(result.to_json(manifest_data, this.dirs), null, '  ')
+				);
+
+				const client_files = result.chunks.map(chunk => `client/${chunk.file}`);
 
 				create_serviceworker_manifest({
-					routes: create_routes(),
+					manifest_data,
 					client_files
 				});
 
+				deferred.fulfil();
+
 				// we need to wait a beat before watching the service
 				// worker, because of some webpack nonsense
 				setTimeout(watch_serviceworker, 100);
@@ -258,11 +328,7 @@ class Watcher extends EventEmitter {
 				watch_serviceworker = noop;
 
 				this.watch(compilers.serviceworker, {
-					name: 'service worker',
-
-					result: info => {
-						fs.writeFileSync(path.join(dest, 'serviceworker_info.json'), JSON.stringify(info, null, '  '));
-					}
+					name: 'service worker'
 				});
 			}
 			: noop;
@@ -272,7 +338,7 @@ class Watcher extends EventEmitter {
 		if (this.closed) return;
 		this.closed = true;
 
-		this.dev_server.close();
+		if (this.dev_server) this.dev_server.close();
 
 		if (this.proc) this.proc.kill();
 		this.filewatchers.forEach(watcher => {
@@ -309,95 +375,34 @@ class Watcher extends EventEmitter {
 		}
 	}
 
-	watch(compiler: any, { name, invalid = noop, result }: {
+	watch(compiler: Compiler, { name, invalid = noop, handle_result = noop }: {
 		name: string,
 		invalid?: (filename: string) => void;
-		result: (stats: any) => void;
+		handle_result?: (result: CompileResult) => void;
 	}) {
-		compiler.hooks.invalid.tap('sapper', (filename: string) => {
-			invalid(filename);
-		});
+		compiler.oninvalid(invalid);
 
-		compiler.watch({}, (err: Error, stats: any) => {
+		compiler.watch((err?: Error, result?: CompileResult) => {
 			if (err) {
 				this.emit('error', <events.ErrorEvent>{
 					type: name,
 					message: err.message
 				});
 			} 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);
-					}),
+					duration: result.duration,
+					errors: result.errors,
+					warnings: result.warnings
 				});
 
-				result(info);
+				handle_result(result);
 			}
 		});
 	}
 }
 
-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 {
@@ -452,20 +457,32 @@ class DevServer {
 
 function noop() {}
 
-function watch_files(pattern: string, events: string[], callback: () => void) {
-	const chokidar = require('chokidar');
+function watch_dir(
+	dir: string,
+	filter: ({ path, stats }: { path: string, stats: fs.Stats }) => boolean,
+	callback: () => void
+) {
+	let watch;
+	let closed = false;
 
-	const watcher = chokidar.watch(pattern, {
-		persistent: true,
-		ignoreInitial: true,
-		disableGlobbing: true
-	});
+	import('cheap-watch').then(CheapWatch => {
+		if (closed) return;
 
-	events.forEach(event => {
-		watcher.on(event, callback);
+		watch = new CheapWatch({ dir, filter, debounce: 50 });
+
+		watch.on('+', ({ isNew }) => {
+			if (isNew) callback();
+		});
+
+		watch.on('-', callback);
+
+		watch.init();
 	});
 
 	return {
-		close: () => watcher.close()
+		close: () => {
+			if (watch) watch.close();
+			closed = true;
+		}
 	};
-}
+}

src/api/export.ts

@@ -1,16 +1,24 @@
 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 * as url from 'url';
 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 clean_html from './utils/clean_html';
+import minify_html from './utils/minify_html';
+import Deferred from './utils/Deferred';
 import * as events from './interfaces';
 
-export function exporter(opts: {}) {
+type Opts = {
+	build: string,
+	dest: string,
+	static: string,
+	basepath?: string,
+	timeout: number | false
+};
+
+export function exporter(opts: Opts) {
 	const emitter = new EventEmitter();
 
 	execute(emitter, opts).then(
@@ -27,37 +35,48 @@ export function exporter(opts: {}) {
 	return emitter;
 }
 
-async function execute(emitter: EventEmitter, {
-	build = 'build',
-	dest = 'export',
-	basepath = ''
-} = {}) {
-	const export_dir = path.join(dest, basepath);
+function resolve(from: string, to: string) {
+	return url.parse(url.resolve(from, to));
+}
+
+type URL = url.UrlWithStringQuery;
+
+async function execute(emitter: EventEmitter, opts: Opts) {
+	const export_dir = path.join(opts.dest, opts.basepath);
 
 	// Prep output directory
 	sander.rimrafSync(export_dir);
 
-	sander.copydirSync('assets').to(export_dir);
-	sander.copydirSync(build, 'client').to(export_dir, 'client');
+	sander.copydirSync(opts.static).to(export_dir);
+	sander.copydirSync(opts.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(opts.build, 'service-worker.js')) {
+		sander.copyFileSync(opts.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');
+	if (sander.existsSync(opts.build, 'service-worker.js.map')) {
+		sander.copyFileSync(opts.build, 'service-worker.js.map').to(export_dir, 'service-worker.js.map');
 	}
 
 	const port = await ports.find(3000);
 
-	const origin = `http://localhost:${port}`;
+	const protocol = 'http:';
+	const host = `localhost:${port}`;
+	const origin = `${protocol}//${host}`;
 
-	const proc = child_process.fork(path.resolve(`${build}/server.js`), [], {
+	const root = resolve(origin, opts.basepath || '');
+	if (!root.href.endsWith('/')) root.href += '/';
+
+	emitter.emit('info', {
+		message: `Crawling ${root.href}`
+	});
+
+	const proc = child_process.fork(path.resolve(`${opts.build}/server/server.js`), [], {
 		cwd: process.cwd(),
 		env: Object.assign({
 			PORT: port,
 			NODE_ENV: 'production',
-			SAPPER_DEST: build,
+			SAPPER_DEST: opts.build,
 			SAPPER_EXPORT: 'true'
 		}, process.env)
 	});
@@ -65,16 +84,14 @@ async function execute(emitter: EventEmitter, {
 	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;
+	function save(path: string, status: number, type: string, body: string) {
+		const { pathname } = resolve(origin, path);
+		let file = decodeURIComponent(pathname.slice(1));
 
 		if (saved.has(file)) return;
 		saved.add(file);
 
-		const is_html = message.type === 'text/html';
+		const is_html = type === 'text/html';
 
 		if (is_html) {
 			file = file === '' ? 'index.html' : `${file}/index.html`;
@@ -83,49 +100,95 @@ async function execute(emitter: EventEmitter, {
 
 		emitter.emit('file', <events.FileEvent>{
 			file,
-			size: body.length
+			size: body.length,
+			status
 		});
 
 		sander.writeFileSync(export_dir, file, body);
+	}
+
+	proc.on('message', message => {
+		if (!message.__sapper__ || message.event !== 'file') return;
+		save(message.url, message.status, message.type, message.body);
 	});
 
 	async function handle(url: URL) {
-		const r = await fetch(url.href);
+		const pathname = (url.pathname.replace(root.pathname, '') || '/');
+
+		if (seen.has(pathname)) return;
+		seen.add(pathname);
+
+		const timeout_deferred = new Deferred();
+		const timeout = setTimeout(() => {
+			timeout_deferred.reject(new Error(`Timed out waiting for ${url.href}`));
+		}, opts.timeout);
+
+		const r = await Promise.race([
+			fetch(url.href, {
+				redirect: 'manual'
+			}),
+			timeout_deferred.promise
+		]);
+
+		clearTimeout(timeout); // prevent it hanging at the end
+
+		let type = r.headers.get('Content-Type');
+		let body = await r.text();
+
 		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);
+			if (type === 'text/html') {
 				const urls: URL[] = [];
 
-				const base = new URL($('base').attr('href') || '/', url.href);
+				const cleaned = clean_html(body);
 
-				$('a[href]').each((i: number, $a) => {
-					const url = new URL($a.attribs.href, base.href);
+				const base_match = /<base ([\s\S]+?)>/m.exec(cleaned);
+				const base_href = base_match && get_href(base_match[1]);
+				const base = resolve(url.href, base_href);
 
-					if (url.origin === origin && !seen.has(url.pathname)) {
-						seen.add(url.pathname);
-						urls.push(url);
+				let match;
+				let pattern = /<a ([\s\S]+?)>/gm;
+
+				while (match = pattern.exec(cleaned)) {
+					const attrs = match[1];
+					const href = get_href(attrs);
+
+					if (href) {
+						const url = resolve(base.href, href);
+
+						if (url.protocol === protocol && url.host === host) {
+							urls.push(url);
+						}
 					}
-				});
-
-				for (const url of urls) {
-					await handle(url);
 				}
+
+				await Promise.all(urls.map(handle));
 			}
 		}
+
+		if (range === 3) {
+			const location = r.headers.get('Location');
+
+			type = 'text/html';
+			body = `<script>window.location.href = "${location.replace(origin, '')}"</script>`;
+
+			await handle(resolve(root.href, location));
+		}
+
+		save(pathname, r.status, type, body);
 	}
 
 	return ports.wait(port)
-		.then(() => handle(new URL(`/${basepath}`, origin))) // TODO all static routes
-		.then(() => proc.kill());
+		.then(() => handle(root))
+		.then(() => proc.kill())
+		.catch(err => {
+			proc.kill();
+			throw err;
+		});
 }
+
+function get_href(attrs: string) {
+	const match = /href\s*=\s*(?:"(.+?)"|'(.+?)'|([^\s>]+))/.exec(attrs);
+	return match[1] || match[2] || match[3];
+}

src/api/find_page.ts

@@ -1,16 +1,14 @@
-import * as glob from 'glob';
 import { locations } from '../config';
-import { create_routes } from '../core';
+import { create_manifest_data } from '../core';
 
-export function find_page(pathname: string, files: string[] = glob.sync('**/*.*', { cwd: locations.routes(), dot: true, nodir: true })) {
-	const routes = create_routes({ files });
+export function find_page(pathname: string, cwd = locations.routes()) {
+	const { pages } = create_manifest_data(cwd);
 
-	for (let i = 0; i < routes.length; i += 1) {
-		const route = routes[i];
+	for (let i = 0; i < pages.length; i += 1) {
+		const page = pages[i];
 
-		if (route.pattern.test(pathname)) {
-			const page = route.handlers.find(handler => handler.type === 'page');
-			if (page) return page.file;
+		if (page.pattern.test(pathname)) {
+			return page.parts[page.parts.length - 1].component.file;
 		}
 	}
 }

src/api/interfaces.ts

@@ -1,4 +1,5 @@
 import * as child_process from 'child_process';
+import { CompileResult } from '../core/create_compilers/interfaces';
 
 export type ReadyEvent = {
 	port: number;
@@ -26,10 +27,10 @@ export type InvalidEvent = {
 
 export type BuildEvent = {
 	type: string;
-	errors: Array<{ message: string, duplicate: boolean }>;
-	warnings: Array<{ message: string, duplicate: boolean }>;
+	errors: Array<{ file: string, message: string, duplicate: boolean }>;
+	warnings: Array<{ file: string, message: string, duplicate: boolean }>;
 	duration: number;
-	webpack_stats: any;
+	result: CompileResult;
 }
 
 export type FileEvent = {
@@ -41,4 +42,4 @@ export type FailureEvent = {
 
 }
 
-export type DoneEvent = {}
+export type DoneEvent = {};

src/api/utils/Deferred.ts

@@ -0,0 +1,12 @@
+export default 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;
+		});
+	}
+}

src/api/utils/clean_html.ts

@@ -0,0 +1,7 @@
+export default function clean_html(html: string) {
+	return html
+		.replace(/<!\[CDATA\[[\s\S]*?\]\]>/gm, '')
+		.replace(/(<script[\s\S]*?>)[\s\S]*?<\/script>/gm, '$1</' + 'script>')
+		.replace(/(<style[\s\S]*?>)[\s\S]*?<\/style>/gm, '$1</' + 'style>')
+		.replace(/<!--[\s\S]*?-->/gm, '');
+}

src/api/utils/copy_shimport.ts

@@ -0,0 +1,9 @@
+import * as fs from 'fs';
+
+export function copy_shimport(dest: string) {
+	const shimport_version = require('shimport/package.json').version;
+	fs.writeFileSync(
+		`${dest}/client/shimport@${shimport_version}.js`,
+		fs.readFileSync(require.resolve('shimport/index.js'))
+	);
+}

src/api/utils/minify_html.ts

@@ -1,6 +1,6 @@
 import { minify } from 'html-minifier';
 
-export function minify_html(html: string) {
+export default function minify_html(html: string) {
 	return minify(html, {
 		collapseBooleanAttributes: true,
 		collapseWhitespace: true,
@@ -8,7 +8,7 @@ export function minify_html(html: string) {
 		decodeEntities: true,
 		html5: true,
 		minifyCSS: true,
-		minifyJS: true,
+		minifyJS: false,
 		removeAttributeQuotes: true,
 		removeComments: true,
 		removeOptionalTags: true,

src/cli.ts

@@ -1,11 +1,8 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import * as child_process from 'child_process';
 import sade from 'sade';
-import * as colors from 'ansi-colors';
+import colors from 'kleur';
 import prettyMs from 'pretty-ms';
-// import upgrade from './cli/upgrade';
-import * as ports from 'port-authority';
 import * as pkg from '../package.json';
 
 const prog = sade('sapper').version(pkg.version);
@@ -14,7 +11,18 @@ prog.command('dev')
 	.describe('Start a development server')
 	.option('-p, --port', 'Specify a port')
 	.option('-o, --open', 'Open a browser window')
-	.action(async (opts: { port: number, open: boolean }) => {
+	.option('--dev-port', 'Specify a port for development server')
+	.option('--hot', 'Use hot module replacement (requires webpack)', true)
+	.option('--live', 'Reload on changes if not using --hot', true)
+	.option('--bundler', 'Specify a bundler (rollup or webpack)')
+	.action(async (opts: {
+		port: number,
+		open: boolean,
+		'dev-port': number,
+		live: boolean,
+		hot: boolean,
+		bundler?: string
+	}) => {
 		const { dev } = await import('./cli/dev');
 		dev(opts);
 	});
@@ -22,8 +30,14 @@ prog.command('dev')
 prog.command('build [dest]')
 	.describe('Create a production-ready version of your app')
 	.option('-p, --port', 'Default of process.env.PORT', '3000')
+	.option('--bundler', 'Specify a bundler (rollup or webpack, blank for auto)')
+	.option('--legacy', 'Create separate legacy build')
 	.example(`build custom-dir -p 4567`)
-	.action(async (dest = 'build', opts: { port: string }) => {
+	.action(async (dest = '__sapper__/build', opts: {
+		port: string,
+		legacy: boolean,
+		bundler?: string
+	}) => {
 		console.log(`> Building...`);
 
 		process.env.NODE_ENV = process.env.NODE_ENV || 'production';
@@ -33,7 +47,7 @@ prog.command('build [dest]')
 
 		try {
 			const { build } = await import('./cli/build');
-			await build();
+			await build(opts);
 
 			const launcher = path.resolve(dest, 'index.js');
 
@@ -44,12 +58,12 @@ prog.command('build [dest]')
 				process.env.PORT = process.env.PORT || ${opts.port || 3000};
 
 				console.log('Starting server on port ' + process.env.PORT);
-				require('./server.js');
+				require('./server/server.js');
 			`.replace(/^\t+/gm, '').trim());
 
 			console.error(`\n> Finished in ${elapsed(start)}. Type ${colors.bold.cyan(`node ${dest}`)} to run the app.`);
 		} catch (err) {
-			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
+			console.log(`${colors.bold.red(`> ${err.message}`)}`);
 			process.exit(1);
 		}
 	});
@@ -65,25 +79,38 @@ prog.command('start [dir]')
 
 prog.command('export [dest]')
 	.describe('Export your app as static files (if possible)')
+	.option('--build', '(Re)build app before exporting', true)
+	.option('--build-dir', 'Specify a custom temporary build directory', '__sapper__/build')
 	.option('--basepath', 'Specify a base path')
-	.action(async (dest = 'export', opts: { basepath?: string }) => {
-		console.log(`> Building...`);
-
+	.option('--timeout', 'Milliseconds to wait for a page (--no-timeout to disable)', 5000)
+	.option('--legacy', 'Create separate legacy build')
+	.option('--bundler', 'Specify a bundler (rollup or webpack, blank for auto)')
+	.action(async (dest = '__sapper__/export', opts: {
+		build: boolean,
+		legacy: boolean,
+		bundler?: string,
+		'build-dir': string,
+		basepath?: string,
+		timeout: number | false
+	}) => {
 		process.env.NODE_ENV = 'production';
-		process.env.SAPPER_DEST = '.sapper/.export';
+		process.env.SAPPER_DEST = opts['build-dir'];
 
 		const start = Date.now();
 
 		try {
-			const { build } = await import('./cli/build');
-			await build();
-			console.error(`\n> Built in ${elapsed(start)}. Crawling site...`);
+			if (opts.build) {
+				console.log(`> Building...`);
+				const { build } = await import('./cli/build');
+				await build(opts);
+				console.error(`\n> Built in ${elapsed(start)}`);
+			}
 
 			const { exporter } = await import('./cli/export');
 			await exporter(dest, opts);
 			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');
+			console.error(colors.bold.red(`> ${err.message}`));
 			process.exit(1);
 		}
 	});

src/cli/build.ts

@@ -1,20 +1,45 @@
 import { build as _build } from '../api/build';
-import * as colors from 'ansi-colors';
+import colors from 'kleur';
 import { locations } from '../config';
+import validate_bundler from './utils/validate_bundler';
+import { repeat } from '../utils';
+
+export function build(opts: { bundler?: string, legacy?: boolean }) {
+	const bundler = validate_bundler(opts.bundler);
+
+	if (opts.legacy && bundler === 'webpack') {
+		throw new Error(`Legacy builds are not supported for projects using webpack`);
+	}
 
-export function build() {
 	return new Promise((fulfil, reject) => {
 		try {
 			const emitter = _build({
+				legacy: opts.legacy,
+				bundler
+			}, {
 				dest: locations.dest(),
-				app: locations.app(),
+				src: locations.src(),
 				routes: locations.routes(),
-				webpack: 'webpack'
+				webpack: 'webpack',
+				rollup: 'rollup'
 			});
 
 			emitter.on('build', event => {
-				console.log(colors.inverse(`\nbuilt ${event.type}`));
-				console.log(event.webpack_stats.toString({ colors: true }));
+				let banner = `built ${event.type}`;
+				let c = colors.cyan;
+
+				const { warnings } = event.result;
+				if (warnings.length > 0) {
+					banner += ` with ${warnings.length} ${warnings.length === 1 ? 'warning' : 'warnings'}`;
+					c = colors.yellow;
+				}
+
+				console.log();
+				console.log(c(`┌─${repeat('─', banner.length)}─┐`));
+				console.log(c(`│ ${colors.bold(banner)       } │`));
+				console.log(c(`└─${repeat('─', banner.length)}─┘`));
+
+				console.log(event.result.print());
 			});
 
 			emitter.on('error', event => {
@@ -25,8 +50,7 @@ export function build() {
 				fulfil();
 			});
 		} catch (err) {
-			console.log(`${colors.bold.red(`> ${err.message}`)}`);
-			process.exit(1);
+			reject(err);
 		}
 	});
 }

src/cli/dev.ts

@@ -1,11 +1,11 @@
 import * as path from 'path';
-import * as colors from 'ansi-colors';
+import colors from 'kleur';
 import * as child_process from 'child_process';
 import prettyMs from 'pretty-ms';
 import { dev as _dev } from '../api/dev';
 import * as events from '../api/interfaces';
 
-export function dev(opts: { port: number, open: boolean }) {
+export function dev(opts: { port: number, open: boolean, bundler?: string }) {
 	try {
 		const watcher = _dev(opts);
 
@@ -13,7 +13,7 @@ export function dev(opts: { port: number, open: boolean }) {
 
 		watcher.on('ready', (event: events.ReadyEvent) => {
 			if (first) {
-				console.log(`${colors.bold.cyan(`> Listening on http://localhost:${event.port}`)}`);
+				console.log(colors.bold.cyan(`> Listening on http://localhost:${event.port}`));
 				if (opts.open) child_process.exec(`open http://localhost:${event.port}`);
 				first = false;
 			}
@@ -35,20 +35,21 @@ export function dev(opts: { port: number, open: boolean }) {
 		});
 
 		watcher.on('error', (event: events.ErrorEvent) => {
-			console.log(`${colors.red(`✗ ${event.type}`)}`);
-			console.log(`${colors.red(event.message)}`);
+			console.log(colors.red(`✗ ${event.type}`));
+			console.log(colors.red(event.message));
 		});
 
 		watcher.on('fatal', (event: events.FatalEvent) => {
-			console.log(`${colors.bold.red(`> ${event.message}`)}`);
+			console.log(colors.bold.red(`> ${event.message}`));
 			if (event.log) console.log(event.log);
 		});
 
 		watcher.on('build', (event: events.BuildEvent) => {
 			if (event.errors.length) {
-				console.log(`${colors.bold.red(`✗ ${event.type}`)}`);
+				console.log(colors.bold.red(`✗ ${event.type}`));
 
 				event.errors.filter(e => !e.duplicate).forEach(error => {
+					if (error.file) console.log(colors.bold(error.file));
 					console.log(error.message);
 				});
 
@@ -57,9 +58,10 @@ export function dev(opts: { port: number, open: boolean }) {
 					console.log(`${hidden} duplicate ${hidden === 1 ? 'error' : 'errors'} hidden\n`);
 				}
 			} else if (event.warnings.length) {
-				console.log(`${colors.bold.yellow(`• ${event.type}`)}`);
+				console.log(colors.bold.yellow(`• ${event.type}`));
 
 				event.warnings.filter(e => !e.duplicate).forEach(warning => {
+					if (warning.file) console.log(colors.bold(warning.file));
 					console.log(warning.message);
 				});
 
@@ -72,7 +74,7 @@ export function dev(opts: { port: number, open: boolean }) {
 			}
 		});
 	} catch (err) {
-		console.log(`${colors.bold.red(`> ${err.message}`)}`);
+		console.log(colors.bold.red(`> ${err.message}`));
 		process.exit(1);
 	}
 }

src/cli/export.ts

@@ -1,23 +1,39 @@
 import { exporter as _exporter } from '../api/export';
-import * as colors from 'ansi-colors';
-import prettyBytes from 'pretty-bytes';
+import colors from 'kleur';
+import pb from 'pretty-bytes';
 import { locations } from '../config';
+import { left_pad } from '../utils';
 
-export function exporter(export_dir: string, { basepath = '' }) {
+export function exporter(export_dir: string, {
+	basepath = '',
+	timeout
+}: {
+	basepath: string,
+	timeout: number | false
+}) {
 	return new Promise((fulfil, reject) => {
 		try {
 			const emitter = _exporter({
 				build: locations.dest(),
+				static: locations.static(),
 				dest: export_dir,
-				basepath
+				basepath,
+				timeout
 			});
 
 			emitter.on('file', event => {
-				console.log(`${colors.bold.cyan(event.file)} ${colors.gray(`(${prettyBytes(event.size)})`)}`);
+				const size_color = event.size > 150000 ? colors.bold.red : event.size > 50000 ? colors.bold.yellow : colors.bold.gray;
+				const size_label = size_color(left_pad(pb(event.size), 10));
+
+				const file_label = event.status === 200
+					? event.file
+					: colors.bold[event.status >= 400 ? 'red' : 'yellow'](`(${event.status}) ${event.file}`);
+
+				console.log(`${size_label}   ${file_label}`);
 			});
 
-			emitter.on('failure', event => {
-				console.log(`${colors.red(`> Received ${event.status} response when fetching ${event.pathname}`)}`);
+			emitter.on('info', event => {
+				console.log(colors.bold.cyan(`> ${event.message}`));
 			});
 
 			emitter.on('error', event => {

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 colors from 'ansi-colors';
+import colors from 'kleur';
 import * as ports from 'port-authority';
 
 export async function start(dir: string, opts: { port: number, open: boolean }) {

src/cli/upgrade.ts

@@ -1,5 +1,5 @@
 import * as fs from 'fs';
-import * as colors from 'ansi-colors';
+import colors from 'kleur';
 
 export default async function upgrade() {
 	const upgraded = [

src/cli/utils/validate_bundler.ts

@@ -0,0 +1,38 @@
+import * as fs from 'fs';
+
+export default function validate_bundler(bundler?: 'rollup' | 'webpack') {
+	if (!bundler) {
+		bundler = (
+			fs.existsSync('rollup.config.js') ? 'rollup' :
+			fs.existsSync('webpack.config.js') ? 'webpack' :
+			null
+		);
+
+		if (!bundler) {
+			// TODO remove in a future version
+			deprecate_dir('rollup');
+			deprecate_dir('webpack');
+
+			throw new Error(`Could not find rollup.config.js or webpack.config.js`);
+		}
+	}
+
+	if (bundler !== 'rollup' && bundler !== 'webpack') {
+		throw new Error(`'${bundler}' is not a valid option for --bundler — must be either 'rollup' or 'webpack'`);
+	}
+
+	return bundler;
+}
+
+function deprecate_dir(bundler: 'rollup' | 'webpack') {
+	try {
+		const stats = fs.statSync(bundler);
+		if (!stats.isDirectory()) return;
+	} catch (err) {
+		// do nothing
+		return;
+	}
+
+	// TODO link to docs, once those docs exist
+	throw new Error(`As of Sapper 0.21, build configuration should be placed in a single ${bundler}.config.js file`);
+}

src/config.ts

@@ -4,7 +4,8 @@ export const dev = () => process.env.NODE_ENV !== 'production';
 
 export const locations = {
 	base:   () => path.resolve(process.env.SAPPER_BASE || ''),
-	app:    () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_APP    || 'app'),
-	routes: () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_ROUTES || 'routes'),
-	dest:   () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_DEST   || '.sapper')
+	src:    () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_SRC    || 'src'),
+	static: () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_STATIC || 'static'),
+	routes: () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_ROUTES || 'src/routes'),
+	dest:   () => path.resolve(process.env.SAPPER_BASE || '', process.env.SAPPER_DEST   || `__sapper__/${dev() ? 'dev' : 'build'}`)
 };

src/core.ts

@@ -1,3 +1,3 @@
 export * from './core/create_manifests';
-export { default as create_compilers } from './core/create_compilers';
-export { default as create_routes } from './core/create_routes';
+export { default as create_compilers } from './core/create_compilers/index';
+export { default as create_manifest_data } from './core/create_manifest_data';

src/core/create_compilers.ts

@@ -1,29 +0,0 @@
-import * as path from 'path';
-import relative from 'require-relative';
-
-export default function create_compilers({ webpack }: { webpack: string }) {
-	const wp = relative('webpack', process.cwd());
-
-	const serviceworker_config = try_require(path.resolve(`${webpack}/service-worker.config.js`));
-
-	return {
-		client: wp(
-			require(path.resolve(`${webpack}/client.config.js`))
-		),
-
-		server: wp(
-			require(path.resolve(`${webpack}/server.config.js`))
-		),
-
-		serviceworker: serviceworker_config && wp(serviceworker_config)
-	};
-}
-
-function try_require(specifier: string) {
-	try {
-		return require(specifier);
-	} catch (err) {
-		if (err.code === 'MODULE_NOT_FOUND') return null;
-		throw err;
-	}
-}

src/core/create_compilers/RollupCompiler.ts

@@ -0,0 +1,167 @@
+import * as path from 'path';
+import relative from 'require-relative';
+import { CompileResult } from './interfaces';
+import RollupResult from './RollupResult';
+
+let rollup: any;
+
+export default class RollupCompiler {
+	_: Promise<any>;
+	_oninvalid: (filename: string) => void;
+	_start: number;
+	input: string;
+	warnings: any[];
+	errors: any[];
+	chunks: any[];
+	css_files: Array<{ id: string, code: string }>;
+
+	constructor(config: any) {
+		this._ = this.get_config(config);
+		this.input = null;
+		this.warnings = [];
+		this.errors = [];
+		this.chunks = [];
+		this.css_files = [];
+	}
+
+	async get_config(mod: any) {
+		// TODO this is hacky, and doesn't need to apply to all three compilers
+		(mod.plugins || (mod.plugins = [])).push({
+			name: 'sapper-internal',
+			options: (opts: any) => {
+				this.input = opts.input;
+			},
+			renderChunk: (code: string, chunk: any) => {
+				this.chunks.push(chunk);
+			},
+			transform: (code: string, id: string) => {
+				if (/\.css$/.test(id)) {
+					this.css_files.push({ id, code });
+					return ``;
+				}
+			}
+		});
+
+		const onwarn = mod.onwarn || ((warning: any, handler: (warning: any) => void) => {
+			handler(warning);
+		});
+
+		mod.onwarn = (warning: any) => {
+			onwarn(warning, (warning: any) => {
+				this.warnings.push(warning);
+			});
+		};
+
+		return mod;
+	}
+
+	oninvalid(cb: (filename: string) => void) {
+		this._oninvalid = cb;
+	}
+
+	async compile(): Promise<CompileResult> {
+		const config = await this._;
+
+		const start = Date.now();
+
+		try {
+			const bundle = await rollup.rollup(config);
+			await bundle.write(config.output);
+
+			return new RollupResult(Date.now() - start, this);
+		} catch (err) {
+			if (err.filename) {
+				// TODO this is a bit messy. Also, can
+				// Rollup emit other kinds of error?
+				err.message = [
+					`Failed to build — error in ${err.filename}: ${err.message}`,
+					err.frame
+				].filter(Boolean).join('\n');
+			}
+
+			throw err;
+		}
+	}
+
+	async watch(cb: (err?: Error, stats?: any) => void) {
+		const config = await this._;
+
+		const watcher = rollup.watch(config);
+
+		watcher.on('change', (id: string) => {
+			this.chunks = [];
+			this.warnings = [];
+			this.errors = [];
+			this._oninvalid(id);
+		});
+
+		watcher.on('event', (event: any) => {
+			switch (event.code) {
+				case 'FATAL':
+					// TODO kill the process?
+					if (event.error.filename) {
+						// TODO this is a bit messy. Also, can
+						// Rollup emit other kinds of error?
+						event.error.message = [
+							`Failed to build — error in ${event.error.filename}: ${event.error.message}`,
+							event.error.frame
+						].filter(Boolean).join('\n');
+					}
+
+					cb(event.error);
+					break;
+
+				case 'ERROR':
+					this.errors.push(event.error);
+					cb(null, new RollupResult(Date.now() - this._start, this));
+					break;
+
+				case 'START':
+				case 'END':
+					// TODO is there anything to do with this info?
+					break;
+
+				case 'BUNDLE_START':
+					this._start = Date.now();
+					break;
+
+				case 'BUNDLE_END':
+					cb(null, new RollupResult(Date.now() - this._start, this));
+					break;
+
+				default:
+					console.log(`Unexpected event ${event.code}`);
+			}
+		});
+	}
+
+	static async load_config() {
+		if (!rollup) rollup = relative('rollup', process.cwd());
+
+		const input = path.resolve('rollup.config.js');
+
+		const bundle = await rollup.rollup({
+			input,
+			external: (id: string) => {
+				return (id[0] !== '.' && !path.isAbsolute(id)) || id.slice(-5, id.length) === '.json';
+			}
+		});
+
+		const { code } = await bundle.generate({ format: 'cjs' });
+
+		// temporarily override require
+		const defaultLoader = require.extensions['.js'];
+		require.extensions['.js'] = (module: any, filename: string) => {
+			if (filename === input) {
+				module._compile(code, filename);
+			} else {
+				defaultLoader(module, filename);
+			}
+		};
+
+		const config: any = require(input);
+		delete require.cache[input];
+
+		return config;
+	}
+}

src/core/create_compilers/RollupResult.ts

@@ -0,0 +1,118 @@
+import * as path from 'path';
+import colors from 'kleur';
+import pb from 'pretty-bytes';
+import RollupCompiler from './RollupCompiler';
+import extract_css from './extract_css';
+import { left_pad } from '../../utils';
+import { CompileResult, BuildInfo, CompileError, Chunk, CssFile } from './interfaces';
+import { ManifestData, Dirs, PageComponent } from '../../interfaces';
+
+export default class RollupResult implements CompileResult {
+	duration: number;
+	errors: CompileError[];
+	warnings: CompileError[];
+	chunks: Chunk[];
+	assets: Record<string, string>;
+	css_files: CssFile[];
+	css: {
+		main: string,
+		chunks: Record<string, string[]>
+	};
+	summary: string;
+
+	constructor(duration: number, compiler: RollupCompiler) {
+		this.duration = duration;
+
+		this.errors = compiler.errors.map(munge_warning_or_error);
+		this.warnings = compiler.warnings.map(munge_warning_or_error); // TODO emit this as they happen
+
+		this.chunks = compiler.chunks.map(chunk => ({
+			file: chunk.fileName,
+			imports: chunk.imports.filter(Boolean),
+			modules: Object.keys(chunk.modules)
+		}));
+
+		this.css_files = compiler.css_files;
+
+		// TODO populate this properly. We don't have named chunks, as in
+		// webpack, but we can have a route -> [chunk] map or something
+		this.assets = {};
+
+		if (typeof compiler.input === 'string') {
+			compiler.chunks.forEach(chunk => {
+				if (compiler.input in chunk.modules) {
+					this.assets.main = chunk.fileName;
+				}
+			});
+		} else {
+			for (const name in compiler.input) {
+				const file = compiler.input[name];
+				this.assets[name] = compiler.chunks.find(chunk => file in chunk.modules).fileName;
+			}
+		}
+
+		this.summary = compiler.chunks.map(chunk => {
+			const size_color = chunk.code.length > 150000 ? colors.bold.red : chunk.code.length > 50000 ? colors.bold.yellow : colors.bold.white;
+			const size_label = left_pad(pb(chunk.code.length), 10);
+
+			const lines = [size_color(`${size_label} ${chunk.fileName}`)];
+
+			const deps = Object.keys(chunk.modules)
+				.map(file => {
+					return {
+						file: path.relative(process.cwd(), file),
+						size: chunk.modules[file].renderedLength
+					};
+				})
+				.filter(dep => dep.size > 0)
+				.sort((a, b) => b.size - a.size);
+
+			const total_unminified = deps.reduce((t, d) => t + d.size, 0);
+
+			deps.forEach((dep, i) => {
+				const c = i === deps.length - 1 ? '└' : '│';
+				let line = `           ${c} ${dep.file}`;
+
+				if (deps.length > 1) {
+					const p = (100 * dep.size / total_unminified).toFixed(1);
+					line += ` (${p}%)`;
+				}
+
+				lines.push(colors.gray(line));
+			});
+
+			return lines.join('\n');
+		}).join('\n');
+	}
+
+	to_json(manifest_data: ManifestData, dirs: Dirs): BuildInfo {
+		// TODO extract_css has side-effects that don't belong
+		// in a method called to_json
+		return {
+			bundler: 'rollup',
+			shimport: require('shimport/package.json').version,
+			assets: this.assets,
+			css: extract_css(this, manifest_data.components, dirs)
+		};
+	}
+
+	print() {
+		const blocks: string[] = this.warnings.map(warning => {
+			return warning.file
+				? `> ${colors.bold(warning.file)}\n${warning.message}`
+				: `> ${warning.message}`;
+		});
+
+		blocks.push(this.summary);
+
+		return blocks.join('\n\n');
+	}
+}
+
+function munge_warning_or_error(warning_or_error: any) {
+	return {
+		file: warning_or_error.filename,
+		message: [warning_or_error.message, warning_or_error.frame].filter(Boolean).join('\n')
+	};
+}
+

src/core/create_compilers/WebpackCompiler.ts

@@ -0,0 +1,46 @@
+import relative from 'require-relative';
+import { CompileResult } from './interfaces';
+import WebpackResult from './WebpackResult';
+
+let webpack: any;
+
+export class WebpackCompiler {
+	_: any;
+
+	constructor(config: any) {
+		if (!webpack) webpack = relative('webpack', process.cwd());
+		this._ = webpack(config);
+	}
+
+	oninvalid(cb: (filename: string) => void) {
+		this._.hooks.invalid.tap('sapper', cb);
+	}
+
+	compile(): Promise<CompileResult> {
+		return new Promise((fulfil, reject) => {
+			this._.run((err: Error, stats: any) => {
+				if (err) {
+					reject(err);
+					process.exit(1);
+				}
+
+				const result = new WebpackResult(stats);
+
+				if (result.errors.length) {
+					console.error(stats.toString({ colors: true }));
+					reject(new Error(`Encountered errors while building app`));
+				}
+
+				else {
+					fulfil(result);
+				}
+			});
+		});
+	}
+
+	watch(cb: (err?: Error, stats?: any) => void) {
+		this._.watch({}, (err?: Error, stats?: any) => {
+			cb(err, stats && new WebpackResult(stats));
+		});
+	}
+}

src/core/create_compilers/WebpackResult.ts

@@ -0,0 +1,73 @@
+import format_messages from 'webpack-format-messages';
+import { CompileResult, BuildInfo, CompileError, Chunk, CssFile } from './interfaces';
+import { ManifestData, Dirs } from '../../interfaces';
+
+const locPattern = /\((\d+):(\d+)\)$/;
+
+function munge_warning_or_error(message: string) {
+	// 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,
+		message: lines.join('\n')
+	};
+}
+
+export default class WebpackResult implements CompileResult {
+	duration: number;
+	errors: CompileError[];
+	warnings: CompileError[];
+	chunks: Chunk[];
+	assets: Record<string, string>;
+	css_files: CssFile[];
+	stats: any;
+
+	constructor(stats: any) {
+		this.stats = stats;
+
+		const info = stats.toJson();
+
+		const messages = format_messages(stats);
+
+		this.errors = messages.errors.map(munge_warning_or_error);
+		this.warnings = messages.warnings.map(munge_warning_or_error);
+
+		this.duration = info.time;
+
+		this.chunks = info.assets.map((chunk: { name: string }) => ({ file: chunk.name }));
+		this.assets = info.assetsByChunkName;
+	}
+
+	to_json(manifest_data: ManifestData, dirs: Dirs): BuildInfo {
+		return {
+			bundler: 'webpack',
+			shimport: null, // webpack has its own loader
+			assets: this.assets,
+			css: {
+				// TODO
+				main: null,
+				chunks: {}
+			}
+		};
+	}
+
+	print() {
+		return this.stats.toString({ colors: true });
+	}
+}

src/core/create_compilers/extract_css.ts

@@ -0,0 +1,237 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import hash from 'string-hash';
+import * as codec from 'sourcemap-codec';
+import { PageComponent, Dirs } from '../../interfaces';
+import { CompileResult } from './interfaces';
+import { posixify } from '../utils'
+
+const inline_sourcemap_header = 'data:application/json;charset=utf-8;base64,';
+
+function extract_sourcemap(raw: string, id: string) {
+	let raw_map: string;
+	let map = null;
+
+	const code = raw.replace(/\/\*#\s+sourceMappingURL=(.+)\s+\*\//g, (m, url) => {
+		if (raw_map) {
+			// TODO should not happen!
+			throw new Error(`Found multiple sourcemaps in single CSS file (${id})`);
+		}
+
+		raw_map = url;
+		return '';
+	}).trim();
+
+	if (raw_map) {
+		if (raw_map.startsWith(inline_sourcemap_header)) {
+			const json = Buffer.from(raw_map.slice(inline_sourcemap_header.length), 'base64').toString();
+			map = JSON.parse(json);
+		} else {
+			// TODO do we want to handle non-inline sourcemaps? could be a rabbit hole
+		}
+	}
+
+	return {
+		code,
+		map
+	};
+}
+
+type SourceMap = {
+	version: 3;
+	file: string;
+	sources: string[];
+	sourcesContent: string[];
+	names: string[];
+	mappings: string;
+};
+
+export default function extract_css(client_result: CompileResult, components: PageComponent[], dirs: Dirs) {
+	const result: {
+		main: string | null;
+		chunks: Record<string, string[]>
+	} = {
+		main: null,
+		chunks: {}
+	};
+
+	if (!client_result.css_files) return; // Rollup-only for now
+
+	const unaccounted_for = new Set();
+
+	const css_map = new Map();
+	client_result.css_files.forEach(css => {
+		unaccounted_for.add(css.id);
+		css_map.set(css.id, css.code);
+	});
+
+	const chunk_map = new Map();
+	client_result.chunks.forEach(chunk => {
+		chunk_map.set(chunk.file, chunk);
+	});
+
+	const chunks_with_css = new Set();
+
+	// figure out which chunks belong to which components...
+	const component_owners = new Map();
+	client_result.chunks.forEach(chunk => {
+		chunk.modules.forEach(module => {
+			const component = posixify(path.relative(dirs.routes, module));
+			component_owners.set(component, chunk);
+		});
+	});
+
+	const chunks_depended_upon_by_component = new Map();
+
+	// ...so we can figure out which chunks don't belong
+	components.forEach(component => {
+		const chunk = component_owners.get(component.file);
+		if (!chunk) {
+			// this should never happen!
+			throw new Error(`Could not find chunk that owns ${component.file}`);
+		}
+
+		const chunks = new Set([chunk]);
+		chunks.forEach(chunk => {
+			chunk.imports.forEach((file: string) => {
+				const chunk = chunk_map.get(file);
+				if (chunk) chunks.add(chunk);
+			});
+		});
+
+		chunks.forEach(chunk => {
+			chunk.modules.forEach((module: string) => {
+				unaccounted_for.delete(module);
+			});
+		});
+
+		chunks_depended_upon_by_component.set(
+			component,
+			chunks
+		);
+	});
+
+	function get_css_from_modules(modules: string[]) {
+		const parts: string[] = [];
+		const mappings: number[][][] = [];
+
+		const combined_map: SourceMap = {
+			version: 3,
+			file: null,
+			sources: [],
+			sourcesContent: [],
+			names: [],
+			mappings: null
+		};
+
+		modules.forEach(module => {
+			if (!/\.css$/.test(module)) return;
+
+			const css = css_map.get(module);
+
+			const { code, map } = extract_sourcemap(css, module);
+
+			parts.push(code);
+
+			if (map) {
+				const lines = codec.decode(map.mappings);
+
+				if (combined_map.sources.length > 0 || combined_map.names.length > 0) {
+					lines.forEach(line => {
+						line.forEach(segment => {
+							// adjust source index
+							segment[1] += combined_map.sources.length;
+
+							// adjust name index
+							if (segment[4]) segment[4] += combined_map.names.length;
+						});
+					});
+				}
+
+				combined_map.sources.push(...map.sources);
+				combined_map.sourcesContent.push(...map.sourcesContent);
+				combined_map.names.push(...map.names);
+
+				mappings.push(...lines);
+			}
+		});
+
+		if (parts.length > 0) {
+			combined_map.mappings = codec.encode(mappings);
+
+			combined_map.sources = combined_map.sources.map(source => path.relative(`${dirs.dest}/client`, source));
+
+			return {
+				code: parts.join('\n'),
+				map: combined_map
+			};
+		}
+
+		return null;
+	}
+
+	let asset_dir = `${dirs.dest}/client`;
+	if (process.env.SAPPER_LEGACY_BUILD) asset_dir += '/legacy';
+
+	const replacements = new Map();
+
+	chunks_depended_upon_by_component.forEach((chunks, component) => {
+		const chunks_with_css = Array.from(chunks).filter(chunk => {
+			const css = get_css_from_modules(chunk.modules);
+
+			if (css) {
+				const { code, map } = css;
+
+				const output_file_name = chunk.file.replace(/\.js$/, '.css');
+
+				map.file = output_file_name;
+				map.sources = map.sources.map(source => path.relative(`${asset_dir}`, source));
+
+				fs.writeFileSync(`${asset_dir}/${output_file_name}`, `${code}\n/* sourceMappingURL=./${output_file_name}.map */`);
+				fs.writeFileSync(`${asset_dir}/${output_file_name}.map`, JSON.stringify(map, null, '  '));
+
+				return true;
+			}
+		});
+
+		const files = chunks_with_css.map(chunk => chunk.file.replace(/\.js$/, '.css'));
+
+		replacements.set(
+			component.file,
+			files
+		);
+
+		result.chunks[component.file] = files;
+	});
+
+	fs.readdirSync(asset_dir).forEach(file => {
+		if (fs.statSync(`${asset_dir}/${file}`).isDirectory()) return;
+
+		const source = fs.readFileSync(`${asset_dir}/${file}`, 'utf-8');
+
+		const replaced = source.replace(/["']__SAPPER_CSS_PLACEHOLDER:(.+?)__["']/g, (m, route) => {
+			return JSON.stringify(replacements.get(route));
+		});
+
+		fs.writeFileSync(`${asset_dir}/${file}`, replaced);
+	});
+
+	const leftover = get_css_from_modules(Array.from(unaccounted_for));
+	if (leftover) {
+		const { code, map } = leftover;
+
+		const main_hash = hash(code);
+
+		const output_file_name = `main.${main_hash}.css`;
+
+		map.file = output_file_name;
+		map.sources = map.sources.map(source => path.relative(asset_dir, source));
+
+		fs.writeFileSync(`${asset_dir}/${output_file_name}`, `${code}\n/* sourceMappingURL=client/${output_file_name}.map */`);
+		fs.writeFileSync(`${asset_dir}/${output_file_name}.map`, JSON.stringify(map, null, '  '));
+
+		result.main = output_file_name;
+	}
+
+	return result;
+}

src/core/create_compilers/index.ts

@@ -0,0 +1,61 @@
+import * as path from 'path';
+import RollupCompiler from './RollupCompiler';
+import { WebpackCompiler } from './WebpackCompiler';
+
+export type Compiler = RollupCompiler | WebpackCompiler;
+
+export type Compilers = {
+	client: Compiler;
+	server: Compiler;
+	serviceworker?: Compiler;
+}
+
+export default async function create_compilers(bundler: 'rollup' | 'webpack'): Promise<Compilers> {
+	if (bundler === 'rollup') {
+		const config = await RollupCompiler.load_config();
+		validate_config(config, 'rollup');
+
+		normalize_rollup_config(config.client);
+		normalize_rollup_config(config.server);
+
+		if (config.serviceworker) {
+			normalize_rollup_config(config.serviceworker);
+		}
+
+		return {
+			client: new RollupCompiler(config.client),
+			server: new RollupCompiler(config.server),
+			serviceworker: config.serviceworker && new RollupCompiler(config.serviceworker)
+		};
+	}
+
+	if (bundler === 'webpack') {
+		const config = require(path.resolve('webpack.config.js'));
+		validate_config(config, 'webpack');
+
+		return {
+			client: new WebpackCompiler(config.client),
+			server: new WebpackCompiler(config.server),
+			serviceworker: config.serviceworker && new WebpackCompiler(config.serviceworker)
+		};
+	}
+
+	// this shouldn't be possible...
+	throw new Error(`Invalid bundler option '${bundler}'`);
+}
+
+function validate_config(config: any, bundler: 'rollup' | 'webpack') {
+	if (!config.client || !config.server) {
+		throw new Error(`${bundler}.config.js must export a { client, server, serviceworker? } object`);
+	}
+}
+
+function normalize_rollup_config(config: any) {
+	if (typeof config.input === 'string') {
+		config.input = path.normalize(config.input);
+	} else {
+		for (const name in config.input) {
+			config.input[name] = path.normalize(config.input[name]);
+		}
+	}
+}

src/core/create_compilers/interfaces.ts

@@ -0,0 +1,39 @@
+import { ManifestData, Dirs } from '../../interfaces';
+
+export type Chunk = {
+	file: string;
+	imports: string[];
+	modules: string[];
+}
+
+export type CssFile = {
+	id: string;
+	code: string;
+};
+
+export class CompileError {
+	file: string;
+	message: string;
+}
+
+export interface CompileResult {
+	duration: number;
+	errors: CompileError[];
+	warnings: CompileError[];
+	chunks: Chunk[];
+	assets: Record<string, string>;
+	css_files: CssFile[];
+
+	to_json: (manifest_data: ManifestData, dirs: Dirs) => BuildInfo
+}
+
+export type BuildInfo = {
+	bundler: string;
+	shimport: string;
+	assets: Record<string, string>;
+	legacy_assets?: Record<string, string>;
+	css: {
+		main: string | null,
+		chunks: Record<string, string[]>
+	}
+}

src/core/create_manifest_data.ts

@@ -0,0 +1,307 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { locations } from '../config';
+import { Page, PageComponent, ServerRoute, ManifestData } from '../interfaces';
+import { posixify, reserved_words } from './utils';
+
+export default function create_manifest_data(cwd = locations.routes()): ManifestData {
+	// TODO remove in a future version
+	if (!fs.existsSync(cwd)) {
+		throw new Error(`As of Sapper 0.21, the routes/ directory should become src/routes/`);
+	}
+
+	const components: PageComponent[] = [];
+	const pages: Page[] = [];
+	const server_routes: ServerRoute[] = [];
+
+	const default_layout: PageComponent = {
+		default: true,
+		name: '_default_layout',
+		file: null
+	};
+
+	function walk(
+		dir: string,
+		parent_segments: Part[][],
+		parent_params: string[],
+		stack: Array<{
+			component: PageComponent,
+			params: string[]
+		}>
+	) {
+		const items = fs.readdirSync(dir)
+			.map(basename => {
+				const resolved = path.join(dir, basename);
+				const file = path.relative(cwd, resolved);
+				const is_dir = fs.statSync(resolved).isDirectory();
+
+				const ext = path.extname(basename);
+				if (!is_dir && !/^\.[a-z]+$/i.test(ext)) return null; // filter out tmp files etc
+
+				const segment = is_dir
+					? basename
+					: basename.slice(0, -path.extname(basename).length);
+
+				const parts = get_parts(segment);
+				const is_index = is_dir ? false : basename.startsWith('index.');
+				const is_page = ext === '.html';
+
+				parts.forEach(part => {
+					if (/\]\[/.test(part.content)) {
+						throw new Error(`Invalid route ${file} — parameters must be separated`);
+					}
+
+					if (part.qualifier && /[\(\)\?\:]/.test(part.qualifier.slice(1, -1))) {
+						throw new Error(`Invalid route ${file} — cannot use (, ), ? or : in route qualifiers`);
+					}
+				});
+
+				return {
+					basename,
+					parts,
+					file: posixify(file),
+					is_dir,
+					is_index,
+					is_page
+				};
+			})
+			.filter(Boolean)
+			.sort(comparator);
+
+		items.forEach(item => {
+			if (item.basename[0] === '_') return;
+
+			if (item.basename[0] === '.') {
+				if (item.file !== '.well-known') return;
+			}
+
+			const segments = parent_segments.slice();
+
+			if (item.is_index && segments.length > 0) {
+				const last_segment = segments[segments.length - 1].slice();
+				const suffix = item.basename
+					.slice(0, -path.extname(item.basename).length).
+					replace('index', '');
+
+				if (suffix) {
+					const last_part = last_segment[last_segment.length - 1];
+					if (last_part.dynamic) {
+						last_segment.push({ dynamic: false, content: suffix });
+					} else {
+						last_segment[last_segment.length - 1] = {
+							dynamic: false,
+							content: `${last_part.content}${suffix}`
+						};
+					}
+
+					segments[segments.length - 1] = last_segment;
+				}
+			} else {
+				segments.push(item.parts);
+			}
+
+			const params = parent_params.slice();
+			params.push(...item.parts.filter(p => p.dynamic).map(p => p.content));
+
+			if (item.is_dir) {
+				const index = path.join(dir, item.basename, '_layout.html');
+
+				const component = fs.existsSync(index) && {
+					name: `${get_slug(item.file)}__layout`,
+					file: `${item.file}/_layout.html`
+				};
+
+				if (component) components.push(component);
+
+				walk(
+					path.join(dir, item.basename),
+					segments,
+					params,
+					component
+						? stack.concat({ component, params })
+						: stack.concat(null)
+				);
+			}
+
+			else if (item.is_page) {
+				const component = {
+					name: get_slug(item.file),
+					file: item.file
+				};
+
+				const parts = stack.concat({
+					component,
+					params
+				});
+
+				components.push(component);
+				if (item.basename === 'index.html') {
+					pages.push({
+						pattern: get_pattern(parent_segments, true),
+						parts
+					});
+				} else {
+					pages.push({
+						pattern: get_pattern(segments, true),
+						parts
+					});
+				}
+			}
+
+			else {
+				server_routes.push({
+					name: `route_${get_slug(item.file)}`,
+					pattern: get_pattern(segments, false),
+					file: item.file,
+					params: params
+				});
+			}
+		});
+	}
+
+	const root_file = path.join(cwd, '_layout.html');
+	const root = fs.existsSync(root_file)
+		? {
+			name: 'main',
+			file: '_layout.html'
+		}
+		: default_layout;
+
+	walk(cwd, [], [], []);
+
+	// check for clashes
+	const seen_pages: Map<string, Page> = new Map();
+	pages.forEach(page => {
+		const pattern = page.pattern.toString();
+		if (seen_pages.has(pattern)) {
+			const file = page.parts.pop().component.file;
+			const other_page = seen_pages.get(pattern);
+			const other_file = other_page.parts.pop().component.file;
+
+			throw new Error(`The ${other_file} and ${file} pages clash`);
+		}
+
+		seen_pages.set(pattern, page);
+	});
+
+	const seen_routes: Map<string, ServerRoute> = new Map();
+	server_routes.forEach(route => {
+		const pattern = route.pattern.toString();
+		if (seen_routes.has(pattern)) {
+			const other_route = seen_routes.get(pattern);
+			throw new Error(`The ${other_route.file} and ${route.file} routes clash`);
+		}
+
+		seen_routes.set(pattern, route);
+	});
+
+	return {
+		root,
+		components,
+		pages,
+		server_routes
+	};
+}
+
+type Part = {
+	content: string;
+	dynamic: boolean;
+	qualifier?: string;
+};
+
+function comparator(
+	a: { basename: string, parts: Part[], file: string, is_index: boolean },
+	b: { basename: string, parts: Part[], file: string, is_index: boolean }
+) {
+	if (a.is_index !== b.is_index) return a.is_index ? -1 : 1;
+
+	const max = Math.max(a.parts.length, b.parts.length);
+
+	for (let i = 0; i < max; i += 1) {
+		const a_sub_part = a.parts[i];
+		const b_sub_part = b.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)
+			);
+		}
+
+		// If both parts dynamic, check for regexp patterns
+		if (a_sub_part.dynamic && b_sub_part.dynamic) {
+			const regexp_pattern = /\((.*?)\)/;
+			const a_match = regexp_pattern.exec(a_sub_part.content);
+			const b_match = regexp_pattern.exec(b_sub_part.content);
+
+			if (!a_match && b_match) {
+				return 1; // No regexp, so less specific than b
+			}
+			if (!b_match && a_match) {
+				return -1;
+			}
+			if (a_match && b_match && a_match[1] !== b_match[1]) {
+				return b_match[1].length - a_match[1].length;
+			}
+		}
+	}
+}
+
+function get_parts(part: string): Part[] {
+	return part.split(/\[(.+)\]/)
+		.map((str, i) => {
+			if (!str) return null;
+			const dynamic = i % 2 === 1;
+
+			const [, content, qualifier] = dynamic
+				? /([^(]+)(\(.+\))?$/.exec(str)
+				: [, str, null];
+
+			return {
+				content,
+				dynamic,
+				qualifier
+			};
+		})
+		.filter(Boolean);
+}
+
+function get_slug(file: string) {
+	let name = file
+		.replace(/[\\\/]index/, '')
+		.replace(/_default([\/\\index])?\.html$/, 'index')
+		.replace(/[\/\\]/g, '_')
+		.replace(/\.\w+$/, '')
+		.replace(/\[([^(]+)(?:\([^(]+\))?\]/, '$$$1')
+		.replace(/[^a-zA-Z0-9_$]/g, c => {
+			return c === '.' ? '_' : `$${c.charCodeAt(0)}`
+		});
+
+	if (reserved_words.has(name)) name += '_';
+	return name;
+}
+
+function get_pattern(segments: Part[][], add_trailing_slash: boolean) {
+	return new RegExp(
+		`^` +
+		segments.map(segment => {
+			return '\\/' + segment.map(part => {
+				return part.dynamic
+					? part.qualifier || '([^\\/]+?)'
+					: encodeURI(part.content.normalize())
+						.replace(/\?/g, '%3F')
+						.replace(/#/g, '%23')
+						.replace(/%5B/g, '[')
+						.replace(/%5D/g, ']');
+			}).join('');
+		}).join('') +
+		(add_trailing_slash ? '\\\/?$' : '$')
+	);
+}

src/core/create_manifests.ts

@@ -1,132 +1,225 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import * as glob from 'glob';
-import { posixify, write_if_changed } from './utils';
+import glob from 'tiny-glob/sync.js';
+import { posixify, stringify, write_if_changed } from './utils';
 import { dev, locations } from '../config';
-import { Route } from '../interfaces';
+import { Page, PageComponent, ServerRoute, ManifestData } from '../interfaces';
 
-export function create_main_manifests({ routes, dev_port }: {
-	routes: Route[];
+export function create_main_manifests({ bundler, manifest_data, dev_port }: {
+	bundler: string,
+	manifest_data: ManifestData;
 	dev_port?: number;
 }) {
-	const path_to_routes = path.relative(`${locations.app()}/manifest`, locations.routes());
+	const manifest_dir = '__sapper__';
+	if (!fs.existsSync(manifest_dir)) fs.mkdirSync(manifest_dir);
 
-	const client_manifest = generate_client(routes, path_to_routes, dev_port);
-	const server_manifest = generate_server(routes, path_to_routes);
+	const path_to_routes = path.relative(manifest_dir, locations.routes());
 
-	write_if_changed(`${locations.app()}/manifest/client.js`, client_manifest);
-	write_if_changed(`${locations.app()}/manifest/server.js`, server_manifest);
+	const client_manifest = generate_client(manifest_data, path_to_routes, bundler, dev_port);
+	const server_manifest = generate_server(manifest_data, path_to_routes);
+
+	write_if_changed(
+		`${manifest_dir}/default-layout.html`,
+		`<svelte:component this={child.component} {...child.props}/>`
+	);
+	write_if_changed(`${manifest_dir}/client.js`, client_manifest);
+	write_if_changed(`${manifest_dir}/server.js`, server_manifest);
 }
 
-export function create_serviceworker_manifest({ routes, client_files }: {
-	routes: Route[];
+export function create_serviceworker_manifest({ manifest_data, client_files }: {
+	manifest_data: ManifestData;
 	client_files: string[];
 }) {
-	const assets = glob.sync('**', { cwd: 'assets', nodir: true });
+	let files;
+
+	// TODO remove in a future version
+	if (fs.existsSync(locations.static())) {
+		files = glob('**', { cwd: locations.static(), filesOnly: true });
+	} else {
+		if (fs.existsSync('assets')) {
+			throw new Error(`As of Sapper 0.21, the assets/ directory should become static/`);
+		}
+
+		files = [];
+	}
 
 	let code = `
 		// This file is generated by Sapper — do not edit it!
 		export const timestamp = ${Date.now()};
 
-		export const assets = [\n\t${assets.map((x: string) => `"${x}"`).join(',\n\t')}\n];
+		export const files = [\n\t${files.map((x: string) => stringify(x)).join(',\n\t')}\n];
+		export { files as assets }; // legacy
 
-		export const shell = [\n\t${client_files.map((x: string) => `"${x}"`).join(',\n\t')}\n];
+		export const shell = [\n\t${client_files.map((x: string) => stringify(x)).join(',\n\t')}\n];
 
-		export const routes = [\n\t${routes.pages.filter(r => r.id !== '_error').map((r: Route) => `{ pattern: ${r.pattern} }`).join(',\n\t')}\n];
+		export const routes = [\n\t${manifest_data.pages.map((r: Page) => `{ pattern: ${r.pattern} }`).join(',\n\t')}\n];
 	`.replace(/^\t\t/gm, '').trim();
 
-	write_if_changed(`${locations.app()}/manifest/service-worker.js`, code);
+	write_if_changed(`__sapper__/service-worker.js`, code);
 }
 
-function generate_client(routes: Route[], path_to_routes: string, dev_port?: number) {
-	const page_ids = new Set(routes.pages.map(page => page.id));
-	const server_routes_to_ignore = routes.server_routes.filter(route => !page_ids.has(route.id));
+function generate_client(
+	manifest_data: ManifestData,
+	path_to_routes: string,
+	bundler: string,
+	dev_port?: number
+) {
+	const template_file = path.resolve(__dirname, '../templates/client.js');
+	const template = fs.readFileSync(template_file, 'utf-8');
 
-	const pages = routes.pages.filter(page => page.id !== '_error');
-	const error_route = routes.pages.find(page => page.id === '_error');
+	const page_ids = new Set(manifest_data.pages.map(page =>
+		page.pattern.toString()));
 
-	let code = `
-		// This file is generated by Sapper — do not edit it!
-		export const routes = {
-			ignore: [${server_routes_to_ignore.map(route => route.pattern).join(', ')}],
+	const server_routes_to_ignore = manifest_data.server_routes.filter(route =>
+		!page_ids.has(route.pattern.toString()));
 
-			pages: [
-				${pages.map(page => {
-					const file = posixify(`${path_to_routes}/${page.file}`);
+	const component_indexes: Record<string, number> = {};
 
-					if (page.id === '_error') {
-						return `{ error: true, load: () => import(/* webpackChunkName: "${page.id}" */ '${file}') }`;
+	const components = `[
+		${manifest_data.components.map((component, i) => {
+			const annotation = bundler === 'webpack'
+				? `/* webpackChunkName: "${component.name}" */ `
+				: '';
+
+			const source = get_file(path_to_routes, component);
+
+			component_indexes[component.name] = i;
+
+			return `{
+			js: () => import(${annotation}${stringify(source)}),
+			css: "__SAPPER_CSS_PLACEHOLDER:${stringify(component.file, false)}__"
+		}`;
+		}).join(',\n\t\t')}
+	]`.replace(/^\t/gm, '').trim();
+
+	let needs_decode = false;
+
+	let pages = `[
+		${manifest_data.pages.map(page => `{
+			// ${page.parts[page.parts.length - 1].component.file}
+			pattern: ${page.pattern},
+			parts: [
+				${page.parts.map(part => {
+					if (part === null) return 'null';
+
+					if (part.params.length > 0) {
+						needs_decode = true;
+						const props = part.params.map((param, i) => `${param}: d(match[${i + 1}])`);
+						return `{ i: ${component_indexes[part.component.name]}, params: match => ({ ${props.join(', ')} }) }`;
 					}
 
-					const params = page.params.length === 0
-						? '{}'
-						: `{ ${page.params.map((part, i) => `${part}: match[${i + 1}]`).join(', ')} }`;
-
-					return `{ pattern: ${page.pattern}, params: ${page.params.length > 0 ? `match` : `()`} => (${params}), load: () => import(/* webpackChunkName: "${page.id}" */ '${file}') }`;
+					return `{ i: ${component_indexes[part.component.name]} }`;
 				}).join(',\n\t\t\t\t')}
-			],
+			]
+		}`).join(',\n\n\t\t')}
+	]`.replace(/^\t/gm, '').trim();
 
-			error: () => import(/* webpackChunkName: '_error' */ '${posixify(`${path_to_routes}/${error_route.file}`)}')
-		};`.replace(/^\t\t/gm, '').trim();
+	if (needs_decode) {
+		pages = `(d => ${pages})(decodeURIComponent)`
+	}
+
+	let footer = '';
 
 	if (dev()) {
 		const sapper_dev_client = posixify(
 			path.resolve(__dirname, '../sapper-dev-client.js')
 		);
 
-		code += `
+		footer = `
 
-			if (module.hot) {
-				import('${sapper_dev_client}').then(client => {
+			if (typeof window !== 'undefined') {
+				import(${stringify(sapper_dev_client)}).then(client => {
 					client.connect(${dev_port});
 				});
 			}`.replace(/^\t{3}/gm, '');
 	}
 
-	return code;
+	return `// This file is generated by Sapper — do not edit it!\n` + template
+		.replace('__ROOT__', stringify(get_file(path_to_routes, manifest_data.root), false))
+		.replace('__ERROR__', stringify(posixify(`${path_to_routes}/_error.html`), false))
+		.replace('__IGNORE__', `[${server_routes_to_ignore.map(route => route.pattern).join(', ')}]`)
+		.replace('__COMPONENTS__', components)
+		.replace('__PAGES__', pages) +
+		footer;
 }
 
-function generate_server(routes: Route[], path_to_routes: string) {
-	const error_route = routes.pages.find(page => page.id === '_error');
+function generate_server(
+	manifest_data: ManifestData,
+	path_to_routes: string
+) {
+	const template_file = path.resolve(__dirname, '../templates/server.js');
+	const template = fs.readFileSync(template_file, 'utf-8');
 
 	const imports = [].concat(
-		routes.server_routes.map(route =>
-			`import * as route_${route.id} from '${posixify(`${path_to_routes}/${route.file}`)}';`),
-		routes.pages.map(page =>
-			`import page_${page.id} from '${posixify(`${path_to_routes}/${page.file}`)}';`),
-		`import error from '${posixify(`${path_to_routes}/${error_route.file}`)}';`
+		manifest_data.server_routes.map(route =>
+			`import * as __${route.name} from ${stringify(posixify(`${path_to_routes}/${route.file}`))};`),
+		manifest_data.components.map(component =>
+			`import __${component.name} from ${stringify(get_file(path_to_routes, component))};`),
+		`import root from ${stringify(get_file(path_to_routes, manifest_data.root))};`,
+		`import error from ${stringify(posixify(`${path_to_routes}/_error.html`))};`
 	);
 
 	let code = `
-		// This file is generated by Sapper — do not edit it!
 		${imports.join('\n')}
 
-		export const routes = {
-			server_routes: [
-				${routes.server_routes.map(route => {
-					const params = route.params.length === 0
-						? '{}'
-						: `{ ${route.params.map((part, i) => `${part}: match[${i + 1}]`).join(', ')} }`;
+		const d = decodeURIComponent;
 
-					return `{ id: '${route.id}', pattern: ${route.pattern}, params: ${route.params.length > 0 ? `match` : `()`} => (${params}), handlers: route_${route.id} }`;
-				}).join(',\n\t\t\t\t')}
+		export const manifest = {
+			server_routes: [
+				${manifest_data.server_routes.map(route => `{
+					// ${route.file}
+					pattern: ${route.pattern},
+					handlers: __${route.name},
+					params: ${route.params.length > 0
+						? `match => ({ ${route.params.map((param, i) => `${param}: d(match[${i + 1}])`).join(', ')} })`
+						: `() => ({})`}
+				}`).join(',\n\n\t\t\t\t')}
 			],
 
 			pages: [
-				${routes.pages.map(page => {
-					const params = page.params.length === 0
-						? '{}'
-						: `{ ${page.params.map((part, i) => `${part}: match[${i + 1}]`).join(', ')} }`;
+				${manifest_data.pages.map(page => `{
+					// ${page.parts[page.parts.length - 1].component.file}
+					pattern: ${page.pattern},
+					parts: [
+						${page.parts.map(part => {
+							if (part === null) return 'null';
 
-					return `{ id: '${page.id}', pattern: ${page.pattern}, params: ${page.params.length > 0 ? `match` : `()`} => (${params}), handler: page_${page.id} }`;
-				}).join(',\n\t\t\t\t')}
+							const props = [
+								`name: "${part.component.name}"`,
+								`file: ${stringify(part.component.file)}`,
+								`component: __${part.component.name}`
+							];
+
+							if (part.params.length > 0) {
+								const params = part.params.map((param, i) => `${param}: d(match[${i + 1}])`);
+								props.push(`params: match => ({ ${params.join(', ')} })`);
+							}
+
+							return `{ ${props.join(', ')} }`;
+						}).join(',\n\t\t\t\t\t\t')}
+					]
+				}`).join(',\n\n\t\t\t\t')}
 			],
 
-			error: {
-				error: true,
-				handler: error
-			}
+			root,
+
+			error
 		};`.replace(/^\t\t/gm, '').trim();
 
-	return code;
+	const build_dir = path.relative(process.cwd(), locations.dest());
+	const src_dir = path.relative(process.cwd(), locations.src());
+
+	return `// This file is generated by Sapper — do not edit it!\n` + template
+		.replace('__BUILD__DIR__', JSON.stringify(build_dir))
+		.replace('__SRC__DIR__', JSON.stringify(src_dir))
+		.replace('__DEV__', dev() ? 'true' : 'false')
+		.replace(/const manifest = __MANIFEST__;/, code);
+}
+
+function get_file(path_to_routes: string, component: PageComponent) {
+	if (component.default) {
+		return `./default-layout.html`;
+	}
+
+	return posixify(`${path_to_routes}/${component.file}`);
 }

src/core/create_routes.ts

@@ -1,186 +0,0 @@
-import * as path from 'path';
-import glob from 'glob';
-import { locations } from '../config';
-import { Route } from '../interfaces';
-
-export default function create_routes({
-	files
-} = {
-	files: glob.sync('**/*.*', {
-		cwd: locations.routes(),
-		dot: true,
-		nodir: true
-	})
-}) {
-	const all_routes = files
-		.filter((file: string) => !/(^|\/|\\)(_(?!error\.html)|\.(?!well-known))/.test(file))
-		.map((file: string) => {
-			if (/]\[/.test(file)) {
-				throw new Error(`Invalid route ${file} — parameters must be separated`);
-			}
-
-			if (file === '4xx.html' || file === '5xx.html') {
-				throw new Error('As of Sapper 0.14, 4xx.html and 5xx.html should be replaced with _error.html');
-			}
-
-			const base = file.replace(/\.[^/.]+$/, '');
-			const parts = base.split('/'); // glob output is always posix-style
-			if (/^index(\..+)?/.test(parts[parts.length - 1])) {
-				const part = parts.pop();
-				if (parts.length > 0) parts[parts.length - 1] += part.slice(5);
-			}
-
-			const id = (
-				parts.join('_').replace(/[[\]]/g, '$').replace(/^\d/, '_$&').replace(/[^a-zA-Z0-9_$]/g, '_')
-			) || '_';
-
-			const type = file.endsWith('.html') ? 'page' : 'route';
-
-			const params: string[] = [];
-			const match_patterns: Record<string, string> = {};
-			const param_pattern = /\[([^\(\]]+)(?:\((.+?)\))?\]/g;
-
-			let match;
-			while (match = param_pattern.exec(base)) {
-				params.push(match[1]);
-				if (typeof match[2] !== 'undefined') {
-					if (/[\(\)\?\:]/.exec(match[2])) {
-						throw new Error('Sapper does not allow (, ), ? or : in RegExp routes yet');
-					}
-					// Make a map of the regexp patterns
-					match_patterns[match[1]] = `(${match[2]}?)`;
-				}
-			}
-
-			// TODO can we do all this with sub-parts? or does
-			// nesting make that impossible?
-			let pattern_string = '';
-			let i = parts.length;
-			let nested = true;
-			while (i--) {
-				const part = encodeURI(parts[i].normalize()).replace(/\?/g, '%3F').replace(/#/g, '%23').replace(/%5B/g, '[').replace(/%5D/g, ']');
-				const dynamic = ~part.indexOf('[');
-
-				if (dynamic) {
-					// Get keys from part and replace with stored match patterns
-					const keys = part.replace(/\(.*?\)/, '').split(/[\[\]]/).filter((x, i) => { if (i % 2) return x });
-					let matcher = part;
-					keys.forEach(k => {
-						const key_pattern = new RegExp('\\[' + k + '(?:\\((.+?)\\))?\\]');
-						matcher = matcher.replace(key_pattern, match_patterns[k] || `([^/]+?)`);
-					})
-					pattern_string = (nested && type === 'page') ? `(?:\\/${matcher}${pattern_string})?` : `\\/${matcher}${pattern_string}`;
-				} else {
-					nested = false;
-					pattern_string = `\\/${part}${pattern_string}`;
-				}
-			}
-
-			const pattern = new RegExp(`^${pattern_string}\\/?$`);
-
-			const test = (url: string) => pattern.test(url);
-
-			const exec = (url: string) => {
-				const match = pattern.exec(url);
-				if (!match) return;
-
-				const result: Record<string, string> = {};
-				params.forEach((param, i) => {
-					result[param] = match[i + 1];
-				});
-
-				return result;
-			};
-
-			return {
-				id,
-				base,
-				type,
-				file,
-				pattern,
-				test,
-				exec,
-				parts,
-				params
-			};
-		});
-
-	const pages = all_routes
-		.filter(r => r.type === 'page')
-		.sort(comparator);
-
-	const server_routes = all_routes
-		.filter(r => r.type === 'route')
-		.sort(comparator);
-
-	return { pages, server_routes };
-}
-
-function comparator(a, b) {
-	if (a.parts[0] === '_error') return -1;
-	if (b.parts[0] === '_error') 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)
-				);
-			}
-
-			// If both parts dynamic, check for regexp patterns
-			if (a_sub_part.dynamic && b_sub_part.dynamic) {
-				const regexp_pattern = /\((.*?)\)/;
-				const a_match = regexp_pattern.exec(a_sub_part.content);
-				const b_match = regexp_pattern.exec(b_sub_part.content);
-
-				if (!a_match && b_match) {
-					return 1; // No regexp, so less specific than b
-				}
-				if (!b_match && a_match) {
-					return -1;
-				}
-				if (a_match && b_match && a_match[1] !== b_match[1]) {
-					return b_match[1].length - a_match[1].length;
-				}
-			}
-		}
-	}
-
-	throw new Error(`The ${a.base} and ${b.base} routes clash`);
-}
-
-function get_sub_parts(part: string) {
-	return part.split(/\[(.+)\]/)
-		.map((content, i) => {
-			if (!content) return null;
-			return {
-				content,
-				dynamic: i % 2 === 1
-			};
-		})
-		.filter(Boolean);
-}

src/core/read_template.ts

@@ -0,0 +1,17 @@
+import * as fs from 'fs';
+import { locations } from '../config';
+
+export default function read_template(dir = locations.src()) {
+	try {
+		return fs.readFileSync(`${dir}/template.html`, 'utf-8');
+	} catch (err) {
+		if (fs.existsSync(`app/template.html`)) {
+			throw new Error(`As of Sapper 0.21, the default folder structure has been changed:
+  app/    --> src/
+  routes/ --> src/routes/
+  assets/ --> static/`);
+		}
+
+		throw err;
+	}
+}

src/core/utils.ts

@@ -1,11 +1,11 @@
-import * as sander from 'sander';
+import * as fs from 'fs';
 
 const previous_contents = new Map();
 
 export function write_if_changed(file: string, code: string) {
 	if (code !== previous_contents.get(file)) {
 		previous_contents.set(file, code);
-		sander.writeFileSync(file, code);
+		fs.writeFileSync(file, code);
 		fudge_mtime(file);
 	}
 }
@@ -14,12 +14,68 @@ export function posixify(file: string) {
 	return file.replace(/[/\\]/g, '/');
 }
 
+export function stringify(string: string, includeQuotes: boolean = true) {
+	const quoted = JSON.stringify(string);
+	return includeQuotes ? quoted : quoted.slice(1, -1);
+}
+
 export function fudge_mtime(file: string) {
 	// need to fudge the mtime so that webpack doesn't go doolally
-	const { atime, mtime } = sander.statSync(file);
-	sander.utimesSync(
+	const { atime, mtime } = fs.statSync(file);
+	fs.utimesSync(
 		file,
 		new Date(atime.getTime() - 999999),
 		new Date(mtime.getTime() - 999999)
 	);
-}
+}
+
+export const reserved_words = new Set([
+	'arguments',
+	'await',
+	'break',
+	'case',
+	'catch',
+	'class',
+	'const',
+	'continue',
+	'debugger',
+	'default',
+	'delete',
+	'do',
+	'else',
+	'enum',
+	'eval',
+	'export',
+	'extends',
+	'false',
+	'finally',
+	'for',
+	'function',
+	'if',
+	'implements',
+	'import',
+	'in',
+	'instanceof',
+	'interface',
+	'let',
+	'new',
+	'null',
+	'package',
+	'private',
+	'protected',
+	'public',
+	'return',
+	'static',
+	'super',
+	'switch',
+	'this',
+	'throw',
+	'true',
+	'try',
+	'typeof',
+	'var',
+	'void',
+	'while',
+	'with',
+	'yield',
+]);

src/interfaces.ts

@@ -18,4 +18,40 @@ export type Template = {
 
 export type Store = {
 	get: () => any;
+};
+
+export type PageComponent = {
+	default?: boolean;
+	name: string;
+	file: string;
+};
+
+export type Page = {
+	pattern: RegExp;
+	parts: Array<{
+		component: PageComponent;
+		params: string[];
+	}>
+};
+
+export type ServerRoute = {
+	name: string;
+	pattern: RegExp;
+	file: string;
+	params: string[];
+};
+
+export type Dirs = {
+	dest: string,
+	src: string,
+	routes: string,
+	webpack: string,
+	rollup: string
+};
+
+export type ManifestData = {
+	root: PageComponent;
+	components: PageComponent[];
+	pages: Page[];
+	server_routes: ServerRoute[];
 };

src/middleware.ts

@@ -1,426 +0,0 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import { URL } from 'url';
-import { ClientRequest, ServerResponse } from 'http';
-import cookie from 'cookie';
-import devalue from 'devalue';
-import fetch from 'node-fetch';
-import { lookup } from './middleware/mime';
-import { locations, dev } from './config';
-import sourceMapSupport from 'source-map-support';
-
-sourceMapSupport.install();
-
-type RouteObject = {
-	id: string;
-	type: 'page' | 'route';
-	pattern: RegExp;
-	params: (match: RegExpMatchArray) => Record<string, string>;
-	module: Component;
-	error?: string;
-}
-
-type Handler = (req: Req, res: ServerResponse, next: () => void) => void;
-
-type Store = {
-	get: () => any
-};
-
-interface Req extends ClientRequest {
-	url: string;
-	baseUrl: string;
-	originalUrl: string;
-	method: string;
-	path: string;
-	params: Record<string, string>;
-	headers: Record<string, string>;
-}
-
-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();
-
-	let emitted_basepath = false;
-
-	const middleware = compose_handlers([
-		(req: Req, res: ServerResponse, next: () => void) => {
-			if (req.baseUrl === undefined) {
-				let { originalUrl } = req;
-				if (req.url === '/' && originalUrl[originalUrl.length - 1] !== '/') {
-					originalUrl += '/';
-				}
-
-				req.baseUrl = originalUrl
-					? originalUrl.slice(0, -req.url.length)
-					: '';
-			}
-
-			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(/\?.*/, '');
-			}
-
-			next();
-		},
-
-		fs.existsSync(path.join(output, 'index.html')) && serve({
-			pathname: '/index.html',
-			cache_control: 'max-age=600'
-		}),
-
-		fs.existsSync(path.join(output, 'service-worker.js')) && serve({
-			pathname: '/service-worker.js',
-			cache_control: 'max-age=600'
-		}),
-
-		fs.existsSync(path.join(output, 'service-worker.js.map')) && serve({
-			pathname: '/service-worker.js.map',
-			cache_control: 'max-age=600'
-		}),
-
-		serve({
-			prefix: '/client/',
-			cache_control: 'max-age=31536000'
-		}),
-
-		get_server_route_handler(routes.server_routes),
-		get_page_handler(App, routes, store)
-	].filter(Boolean));
-
-	return middleware;
-}
-
-function serve({ prefix, pathname, cache_control }: {
-	prefix?: string,
-	pathname?: string,
-	cache_control: string
-}) {
-	const filter = pathname
-		? (req: Req) => req.path === pathname
-		: (req: Req) => req.path.startsWith(prefix);
-
-	const output = locations.dest();
-
-	const cache: Map<string, Buffer> = new Map();
-
-	const read = dev()
-		? (file: string) => fs.readFileSync(path.resolve(output, file))
-		: (file: string) => (cache.has(file) ? cache : cache.set(file, fs.readFileSync(path.resolve(output, file)))).get(file)
-
-	return (req: Req, res: ServerResponse, next: () => void) => {
-		if (filter(req)) {
-			const type = lookup(req.path);
-
-			try {
-				const data = read(req.path.slice(1));
-
-				res.setHeader('Content-Type', type);
-				res.setHeader('Cache-Control', cache_control);
-				res.end(data);
-			} catch (err) {
-				res.statusCode = 404;
-				res.end('not found');
-			}
-		} else {
-			next();
-		}
-	};
-}
-
-function get_server_route_handler(routes: RouteObject[]) {
-	function handle_route(route, req, res, next) {
-		req.params = route.params(route.pattern.exec(req.path));
-
-		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 = route.handlers[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);
-				};
-
-				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);
-
-					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_next = (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_next);
-			} catch (err) {
-				handle_next(err);
-			}
-		} else {
-			// no matching handler for method
-			process.nextTick(next);
-		}
-	}
-
-	return function find_route(req: Req, res: ServerResponse, next) {
-		for (const route of routes) {
-			if (route.pattern.test(req.path)) {
-				handle_route(route, req, res, next);
-				return;
-			}
-		}
-
-		next();
-	};
-}
-
-function get_page_handler(App: Component, routes: RouteObject[], store_getter: (req: Req) => Store) {
-	const output = locations.dest();
-
-	const get_chunks = dev()
-		? () => JSON.parse(fs.readFileSync(path.join(output, 'client_assets.json'), 'utf-8'))
-		: (assets => () => assets)(JSON.parse(fs.readFileSync(path.join(output, 'client_assets.json'), 'utf-8')));
-
-	const template = dev()
-		? () => fs.readFileSync(`${locations.app()}/template.html`, 'utf-8')
-		: (str => () => str)(fs.readFileSync(`${locations.dest()}/template.html`, 'utf-8'));
-
-	const { server_routes, pages } = routes;
-	const error_route = routes.error;
-
-	function handle_route(route: RouteObject, req: Req, res: ServerResponse, status = 200, error: Error | string = null) {
-		req.params = error
-			? {}
-			: route.params(route.pattern.exec(req.path));
-
-		const chunks: Record<string, string> = get_chunks();
-
-		res.setHeader('Content-Type', 'text/html');
-
-		// preload main.js and current route
-		// TODO detect other stuff we can preload? images, CSS, fonts?
-		const link = []
-			.concat(chunks.main, chunks[route.id] || chunks._error) // TODO this is gross
-			.filter(file => !file.match(/\.map$/))
-			.map(file => `<${req.baseUrl}/client/${file}>;rel="preload";as="script"`)
-			.join(', ');
-
-		res.setHeader('Link', link);
-
-		const store = store_getter ? store_getter(req) : null;
-		const props = { params: req.params, query: req.query, path: req.path };
-
-		if (route.error) {
-			props.error = error instanceof Error ? error : { message: error };
-			props.status = status;
-		}
-
-		let redirect: { statusCode: number, location: string };
-		let preload_error: { statusCode: number, message: Error | string };
-
-		Promise.resolve(
-			route.handler.preload ? route.handler.preload.call({
-				redirect: (statusCode: number, location: string) => {
-					redirect = { statusCode, location };
-				},
-				error: (statusCode: number, message: Error | string) => {
-					preload_error = { statusCode, message };
-				},
-				fetch: (url: string, opts?: any) => {
-					const parsed = new URL(url, `http://127.0.0.1:${process.env.PORT}${req.baseUrl ? req.baseUrl + '/'  :''}`);
-
-					if (opts) {
-						opts = Object.assign({}, opts);
-
-						const include_cookies = (
-							opts.credentials === 'include' ||
-							opts.credentials === 'same-origin' && parsed.origin === `http://127.0.0.1:${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 => {
-			preload_error = { statusCode: 500, message: err };
-		}).then(preloaded => {
-			if (redirect) {
-				res.statusCode = redirect.statusCode;
-				res.setHeader('Location', `${req.baseUrl}/${redirect.location}`);
-				res.end();
-
-				return;
-			}
-
-			if (preload_error) {
-				handle_route(error_route, req, res, preload_error.statusCode, preload_error.message);
-				return;
-			}
-
-			const serialized = {
-				preloaded: route.handler.preload && try_serialize(preloaded),
-				store: store && try_serialize(store.get())
-			};
-			Object.assign(props, preloaded);
-
-			const { html, head, css } = App.render({ Page: route.handler, props }, {
-				store
-			});
-
-			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/${file}'></script>`)
-				.join('');
-
-			let inline_script = `__SAPPER__={${[
-				`baseUrl: "${req.baseUrl}"`,
-				serialized.preloaded && `preloaded: ${serialized.preloaded}`,
-				serialized.store && `store: ${serialized.store}`
-			].filter(Boolean).join(',')}};`;
-
-			const has_service_worker = fs.existsSync(path.join(locations.dest(), 'service-worker.js'));
-			if (has_service_worker) {
-				inline_script += `if ('serviceWorker' in navigator) navigator.serviceWorker.register('${req.baseUrl}/service-worker.js');`;
-			}
-
-			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.statusCode = status;
-			res.end(page);
-
-			if (process.send) {
-				process.send({
-					__sapper__: true,
-					event: 'file',
-					url: req.url,
-					method: req.method,
-					status: 200,
-					type: 'text/html',
-					body: page
-				});
-			}
-		});
-	}
-
-	return function find_route(req: Req, res: ServerResponse) {
-		if (!server_routes.some(route => route.pattern.test(req.path))) {
-			for (const page of pages) {
-				if (page.pattern.test(req.path)) {
-					handle_route(page, req, res);
-					return;
-				}
-			}
-		}
-
-		handle_route(error_route, req, res, 404, 'Not found');
-	};
-}
-
-function compose_handlers(handlers: Handler[]) {
-	return (req: Req, res: ServerResponse, next: () => void) => {
-		let i = 0;
-		function go() {
-			const handler = handlers[i];
-
-			if (handler) {
-				handler(req, res, () => {
-					i += 1;
-					go();
-				});
-			} else {
-				next();
-			}
-		}
-
-		go();
-	};
-}
-
-function try_serialize(data: any) {
-	try {
-		return devalue(data);
-	} catch (err) {
-		return null;
-	}
-}

src/rollup.ts

@@ -0,0 +1,53 @@
+import { locations, dev } from './config';
+
+export default {
+	dev: dev(),
+
+	client: {
+		input: () => {
+			return `${locations.src()}/client.js`
+		},
+
+		output: () => {
+			let dir = `${locations.dest()}/client`;
+			if (process.env.SAPPER_LEGACY_BUILD) dir += `/legacy`;
+
+			return {
+				dir,
+				entryFileNames: '[name].[hash].js',
+				chunkFileNames: '[name].[hash].js',
+				format: 'esm',
+				sourcemap: dev()
+			};
+		}
+	},
+
+	server: {
+		input: () => {
+			return {
+				server: `${locations.src()}/server.js`
+			};
+		},
+
+		output: () => {
+			return {
+				dir: `${locations.dest()}/server`,
+				format: 'cjs',
+				sourcemap: dev()
+			};
+		}
+	},
+
+	serviceworker: {
+		input: () => {
+			return `${locations.src()}/service-worker.js`;
+		},
+
+		output: () => {
+			return {
+				file: `${locations.dest()}/service-worker.js`,
+				format: 'iife'
+			}
+		}
+	}
+};

src/runtime/index.ts

@@ -1,329 +0,0 @@
-import { detach, findAnchor, scroll_state, which } from './utils';
-import { Component, ComponentConstructor, Params, Query, Route, RouteData, ScrollPosition, Store, Target } from './interfaces';
-
-const manifest = typeof window !== 'undefined' && window.__SAPPER__;
-
-export let App: ComponentConstructor;
-export let component: Component;
-let target: Node;
-let store: Store;
-let routes: Route[];
-let error_route: Route;
-
-const history = typeof window !== 'undefined' ? window.history : {
-	pushState: (state: any, title: string, href: string) => {},
-	replaceState: (state: any, title: string, href: string) => {},
-	scrollRestoration: ''
-};
-
-const scroll_history: Record<string, ScrollPosition> = {};
-let uid = 1;
-let cid: number;
-
-if ('scrollRestoration' in history) {
-	history.scrollRestoration = 'manual';
-}
-
-function select_route(url: URL): Target {
-	if (url.origin !== window.location.origin) return null;
-	if (!url.pathname.startsWith(manifest.baseUrl)) return null;
-
-	const path = url.pathname.slice(manifest.baseUrl.length);
-
-	// avoid accidental clashes between server routes and pages
-	if (routes.ignore.some(pattern => pattern.test(path))) return;
-
-	for (let i = 0; i < routes.pages.length; i += 1) {
-		const page = routes.pages[i];
-
-		const match = page.pattern.exec(path);
-		if (match) {
-			const params = page.params(match);
-
-			const query: Record<string, string | true> = {};
-			if (url.search.length > 0) {
-				url.search.slice(1).split('&').forEach(searchParam => {
-					const [, key, value] = /([^=]+)=(.*)/.exec(searchParam);
-					query[key] = value || true;
-				})
-			}
-			return { url, route: page, props: { params, query, path } };
-		}
-	}
-}
-
-let current_token: {};
-
-function render(Page: ComponentConstructor, props: any, scroll: ScrollPosition, token: {}) {
-	if (current_token !== token) return;
-
-	const data = {
-		Page,
-		props,
-		preloading: false
-	};
-
-	if (component) {
-		component.set(data);
-	} else {
-		// first load — remove SSR'd <head> contents
-		const start = document.querySelector('#sapper-head-start');
-		const end = document.querySelector('#sapper-head-end');
-
-		if (start && end) {
-			while (start.nextSibling !== end) detach(start.nextSibling);
-			detach(start);
-			detach(end);
-		}
-
-		component = new App({
-			target,
-			data,
-			store,
-			hydrate: true
-		});
-	}
-
-	if (scroll) {
-		window.scrollTo(scroll.x, scroll.y);
-	}
-}
-
-function prepare_route(Page: ComponentConstructor, props: RouteData) {
-	let redirect: { statusCode: number, location: string } = null;
-	let error: { statusCode: number, message: Error | string } = null;
-
-	if (!Page.preload) {
-		return { Page, props, redirect, error };
-	}
-
-	if (!component && manifest.preloaded) {
-		return { Page, props: Object.assign(props, manifest.preloaded), redirect, error };
-	}
-
-	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) => {
-			redirect = { statusCode, location };
-		},
-		error: (statusCode: number, message: Error | string) => {
-			error = { statusCode, message };
-		}
-	}, props)).catch(err => {
-		error = { statusCode: 500, message: err };
-	}).then(preloaded => {
-		if (error) {
-			return error_route().then(({ default: Page }: { default: ComponentConstructor }) => {
-				const err = error.message instanceof Error ? error.message : new Error(error.message);
-				Object.assign(props, { status: error.statusCode, error: err });
-				return { Page, props, redirect: null };
-			});
-		}
-
-		Object.assign(props, preloaded)
-		return { Page, props, redirect };
-	});
-}
-
-function navigate(target: Target, id: number): Promise<any> {
-	if (id) {
-		// popstate or initial navigation
-		cid = id;
-	} else {
-		// clicked on a link. preserve scroll state
-		scroll_history[cid] = scroll_state();
-
-		id = cid = ++uid;
-		scroll_history[cid] = { x: 0, y: 0 };
-	}
-
-	cid = id;
-
-	const loaded = prefetching && prefetching.href === target.url.href ?
-		prefetching.promise :
-		target.route.load().then(mod => prepare_route(mod.default, target.props));
-
-	prefetching = null;
-
-	const token = current_token = {};
-
-	return loaded.then(({ Page, props, redirect }) => {
-		if (redirect) {
-			return goto(redirect.location, { replaceState: true });
-		}
-
-		render(Page, props, scroll_history[id], token);
-		document.activeElement.blur();
-	});
-}
-
-function handle_click(event: MouseEvent) {
-	// Adapted from https://github.com/visionmedia/page.js
-	// MIT license https://github.com/visionmedia/page.js#license
-	if (which(event) !== 1) return;
-	if (event.metaKey || event.ctrlKey || event.shiftKey) return;
-	if (event.defaultPrevented) return;
-
-	const a: HTMLAnchorElement | SVGAElement = <HTMLAnchorElement | SVGAElement>findAnchor(<Node>event.target);
-	if (!a) return;
-
-	// check if link is inside an svg
-	// in this case, both href and target are always inside an object
-	const svg = typeof a.href === 'object' && a.href.constructor.name === 'SVGAnimatedString';
-	const href = String(svg ? (<SVGAElement>a).href.baseVal : a.href);
-
-	if (href === window.location.href) {
-		event.preventDefault();
-		return;
-	}
-
-	// Ignore if tag has
-	// 1. 'download' attribute
-	// 2. rel='external' attribute
-	if (a.hasAttribute('download') || a.getAttribute('rel') === 'external') return;
-
-	// Ignore if <a> has a target
-	if (svg ? (<SVGAElement>a).target.baseVal : a.target) return;
-
-	const url = new URL(href);
-
-	// Don't handle hash changes
-	if (url.pathname === window.location.pathname && url.search === window.location.search) return;
-
-	const target = select_route(url);
-	if (target) {
-		navigate(target, null);
-		event.preventDefault();
-		history.pushState({ id: cid }, '', url.href);
-	}
-}
-
-function handle_popstate(event: PopStateEvent) {
-	scroll_history[cid] = scroll_state();
-
-	if (event.state) {
-		const url = new URL(window.location.href);
-		const target = select_route(url);
-		if (target) {
-			navigate(target, event.state.id);
-		} else {
-			window.location.href = window.location.href;
-		}
-	} else {
-		// hashchange
-		cid = ++uid;
-		history.replaceState({ id: cid }, '', window.location.href);
-	}
-}
-
-let prefetching: {
-	href: string;
-	promise: Promise<{ Page: ComponentConstructor, props: any }>;
-} = null;
-
-export function prefetch(href: string) {
-	const selected = select_route(new URL(href, document.baseURI));
-
-	if (selected && (!prefetching || href !== prefetching.href)) {
-		prefetching = {
-			href,
-			promise: selected.route.load().then(mod => prepare_route(mod.default, selected.props))
-		};
-	}
-}
-
-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;
-
-	prefetch(a.href);
-}
-
-let inited: boolean;
-
-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;
-	error_route = opts.routes.error;
-
-	if (opts && opts.store) {
-		store = opts.store(manifest.store);
-	}
-
-	if (!inited) { // this check makes HMR possible
-		window.addEventListener('click', handle_click);
-		window.addEventListener('popstate', handle_popstate);
-
-		// prefetch
-		window.addEventListener('touchstart', trigger_prefetch);
-		window.addEventListener('mousemove', handle_mousemove);
-
-		inited = true;
-	}
-
-	return Promise.resolve().then(() => {
-		const { hash, href } = window.location;
-
-		const deep_linked = hash && document.getElementById(hash.slice(1));
-		scroll_history[uid] = deep_linked ?
-			{ x: 0, y: deep_linked.getBoundingClientRect().top } :
-			scroll_state();
-
-		history.replaceState({ id: uid }, '', href);
-
-		const target = select_route(new URL(window.location.href));
-		if (target) return navigate(target, uid);
-	});
-}
-
-export function goto(href: string, opts = { replaceState: false }) {
-	const target = select_route(new URL(href, document.baseURI));
-	let promise;
-
-	if (target) {
-		promise = navigate(target, null);
-		if (history) history[opts.replaceState ? 'replaceState' : 'pushState']({ id: cid }, '', href);
-	} else {
-		window.location.href = href;
-		promise = new Promise(f => {}); // never resolves
-	}
-
-	return promise;
-}
-
-export function prefetchRoutes(pathnames: string[]) {
-	if (!routes) throw new Error(`You must call init() first`);
-
-	return routes.pages
-		.filter(route => {
-			if (!pathnames) return true;
-			return pathnames.some(pathname => route.pattern.test(pathname));
-		})
-		.reduce((promise: Promise<any>, route) => {
-			return promise.then(route.load);
-		}, Promise.resolve());
-}
-
-// remove this in 0.9
-export { prefetchRoutes as preloadRoutes };

src/runtime/interfaces.ts

@@ -1,34 +0,0 @@
-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, path: string };
-
-export interface ComponentConstructor {
-	new (options: { target: Node, data: any, store: Store, hydrate: boolean }): Component;
-	preload: (props: { params: Params, query: Query }) => Promise<any>;
-};
-
-export interface Component {
-	destroy: () => void;
-}
-
-export type Route = {
-	pattern: RegExp;
-	load: () => Promise<{ default: ComponentConstructor }>;
-	error?: boolean;
-	params?: (match: RegExpExecArray) => Record<string, string>;
-	ignore?: boolean;
-};
-
-export type ScrollPosition = {
-	x: number;
-	y: number;
-};
-
-export type Target = {
-	url: URL;
-	route: Route;
-	props: RouteData;
-};

src/runtime/utils.ts

@@ -1,19 +0,0 @@
-export function detach(node: Node) {
-	node.parentNode.removeChild(node);
-}
-
-export function findAnchor(node: Node) {
-	while (node && node.nodeName.toUpperCase() !== 'A') node = node.parentNode; // SVG <a> elements have a lowercase name
-	return node;
-}
-
-export function which(event: MouseEvent) {
-	return event.which === null ? event.button : event.which;
-}
-
-export function scroll_state() {
-	return {
-		x: window.scrollX,
-		y: window.scrollY
-	};
-}

src/utils.ts

@@ -0,0 +1,10 @@
+export function left_pad(str: string, len: number) {
+	while (str.length < len) str = ` ${str}`;
+	return str;
+}
+
+export function repeat(str: string, i: number) {
+	let result = '';
+	while (i--) result += str;
+	return result;
+}

src/webpack.ts

@@ -6,7 +6,7 @@ export default {
 	client: {
 		entry: () => {
 			return {
-				main: `${locations.app()}/client`
+				main: `${locations.src()}/client`
 			};
 		},
 
@@ -23,13 +23,13 @@ export default {
 	server: {
 		entry: () => {
 			return {
-				server: `${locations.app()}/server`
+				server: `${locations.src()}/server`
 			};
 		},
 
 		output: () => {
 			return {
-				path: locations.dest(),
+				path: `${locations.dest()}/server`,
 				filename: '[name].js',
 				chunkFilename: '[hash]/[name].[id].js',
 				libraryTarget: 'commonjs2'
@@ -40,7 +40,7 @@ export default {
 	serviceworker: {
 		entry: () => {
 			return {
-				'service-worker': `${locations.app()}/service-worker`
+				'service-worker': `${locations.src()}/service-worker`
 			};
 		},
 

templates/src/client/app.ts

@@ -0,0 +1,374 @@
+import RootComponent from '__ROOT__';
+import ErrorComponent from '__ERROR__';
+import {
+	Target,
+	ScrollPosition,
+	Component,
+	Redirect,
+	ComponentLoader,
+	ComponentConstructor,
+	RootProps,
+	Page
+} from './types';
+import goto from './goto';
+
+const ignore = __IGNORE__;
+export const components: ComponentLoader[] = __COMPONENTS__;
+export const pages: Page[] = __PAGES__;
+
+let ready = false;
+let root_component: Component;
+let segments: string[] = [];
+let current_token: {};
+let root_preload: Promise<any>;
+let root_data: any;
+
+const root_props: RootProps = {
+	path: null,
+	params: null,
+	query: null,
+	child: {
+		segment: null,
+		component: null,
+		props: {}
+	}
+};
+
+export let prefetching: {
+	href: string;
+	promise: Promise<{ redirect?: Redirect, data?: any, nullable_depth?: number }>;
+} = null;
+export function set_prefetching(href, promise) {
+	prefetching = { href, promise };
+}
+
+export let store;
+export function set_store(fn) {
+	store = fn(initial_data.store);
+}
+
+export let target: Node;
+export function set_target(element) {
+	target = element;
+}
+
+export let uid = 1;
+export function set_uid(n) {
+	uid = n;
+}
+
+export let cid: number;
+export function set_cid(n) {
+	cid = n;
+}
+
+export const initial_data = typeof __SAPPER__ !== 'undefined' && __SAPPER__;
+
+const _history = typeof history !== 'undefined' ? history : {
+	pushState: (state: any, title: string, href: string) => {},
+	replaceState: (state: any, title: string, href: string) => {},
+	scrollRestoration: ''
+};
+export { _history as history };
+
+export const scroll_history: Record<string, ScrollPosition> = {};
+
+export function select_route(url: URL): Target {
+	if (url.origin !== location.origin) return null;
+	if (!url.pathname.startsWith(initial_data.baseUrl)) return null;
+
+	const path = url.pathname.slice(initial_data.baseUrl.length);
+
+	// avoid accidental clashes between server routes and pages
+	if (ignore.some(pattern => pattern.test(path))) return;
+
+	for (let i = 0; i < pages.length; i += 1) {
+		const page = pages[i];
+
+		const match = page.pattern.exec(path);
+		if (match) {
+			const query: Record<string, string | true> = {};
+			if (url.search.length > 0) {
+				url.search.slice(1).split('&').forEach(searchParam => {
+					const [, key, value] = /([^=]+)(?:=(.*))?/.exec(searchParam);
+					query[key] = decodeURIComponent((value || '').replace(/\+/g, ' '));
+				});
+			}
+			return { url, path, page, match, query };
+		}
+	}
+}
+
+export function scroll_state() {
+	return {
+		x: scrollX,
+		y: scrollY
+	};
+}
+
+export function navigate(target: Target, id: number, noscroll = false): Promise<any> {
+	if (id) {
+		// popstate or initial navigation
+		cid = id;
+	} else {
+		const current_scroll = scroll_state();
+
+		// clicked on a link. preserve scroll state
+		scroll_history[cid] = current_scroll;
+
+		id = cid = ++uid;
+		scroll_history[cid] = noscroll ? current_scroll : { x: 0, y: 0 };
+	}
+
+	cid = id;
+
+	if (root_component) {
+		root_component.set({ preloading: true });
+	}
+	const loaded = prefetching && prefetching.href === target.url.href ?
+		prefetching.promise :
+		prepare_page(target);
+
+	prefetching = null;
+
+	const token = current_token = {};
+
+	return loaded.then(({ redirect, data, nullable_depth }) => {
+		if (redirect) {
+			return goto(redirect.location, { replaceState: true });
+		}
+
+		render(data, nullable_depth, scroll_history[id], token);
+		if (document.activeElement) document.activeElement.blur();
+	});
+}
+
+function render(data: any, nullable_depth: number, scroll: ScrollPosition, token: {}) {
+	if (current_token !== token) return;
+
+	if (root_component) {
+		// first, clear out highest-level root component
+		let level = data.child;
+		for (let i = 0; i < nullable_depth; i += 1) {
+			if (i === nullable_depth) break;
+			level = level.props.child;
+		}
+
+		const { component } = level;
+		level.component = null;
+		root_component.set({ child: data.child });
+
+		// then render new stuff
+		level.component = component;
+		root_component.set(data);
+	} else {
+		// first load — remove SSR'd <head> contents
+		const start = document.querySelector('#sapper-head-start');
+		const end = document.querySelector('#sapper-head-end');
+
+		if (start && end) {
+			while (start.nextSibling !== end) detach(start.nextSibling);
+			detach(start);
+			detach(end);
+		}
+
+		Object.assign(data, root_data);
+
+		root_component = new RootComponent({
+			target,
+			data,
+			store,
+			hydrate: true
+		});
+	}
+
+	if (scroll) {
+		scrollTo(scroll.x, scroll.y);
+	}
+
+	Object.assign(root_props, data);
+	ready = true;
+}
+
+export function prepare_page(target: Target): Promise<{
+	redirect?: Redirect;
+	data?: any;
+	nullable_depth?: number;
+}> {
+	const { page, path, query } = target;
+	const new_segments = path.split('/').filter(Boolean);
+	let changed_from = 0;
+
+	while (
+		segments[changed_from] &&
+		new_segments[changed_from] &&
+		segments[changed_from] === new_segments[changed_from]
+	) changed_from += 1;
+
+	let redirect: Redirect = null;
+	let error: { statusCode: number, message: Error | string } = null;
+
+	const preload_context = {
+		store,
+		fetch: (url: string, opts?: any) => fetch(url, opts),
+		redirect: (statusCode: number, location: string) => {
+			if (redirect && (redirect.statusCode !== statusCode || redirect.location !== location)) {
+				throw new Error(`Conflicting redirects`);
+			}
+			redirect = { statusCode, location };
+		},
+		error: (statusCode: number, message: Error | string) => {
+			error = { statusCode, message };
+		}
+	};
+
+	if (!root_preload) {
+		root_preload = RootComponent.preload
+			? initial_data.preloaded[0] || RootComponent.preload.call(preload_context, {
+				path,
+				query,
+				params: {}
+			})
+			: {};
+	}
+
+	return Promise.all(page.parts.map((part, i) => {
+		if (i < changed_from) return null;
+		if (!part) return null;
+
+		return load_component(components[part.i]).then(Component => {
+			const req = {
+				path,
+				query,
+				params: part.params ? part.params(target.match) : {}
+			};
+
+			let preloaded;
+			if (ready || !initial_data.preloaded[i + 1]) {
+				preloaded = Component.preload
+					? Component.preload.call(preload_context, req)
+					: {};
+			} else {
+				preloaded = initial_data.preloaded[i + 1];
+			}
+
+			return Promise.resolve(preloaded).then(preloaded => {
+				return { Component, preloaded };
+			});
+		});
+	})).catch(err => {
+		error = { statusCode: 500, message: err };
+		return [];
+	}).then(results => {
+		if (root_data) {
+			return results;
+		} else {
+			return Promise.resolve(root_preload).then(value => {
+				root_data = value;
+				return results;
+			});
+		}
+	}).then(results => {
+		if (redirect) {
+			return { redirect };
+		}
+
+		segments = new_segments;
+
+		const get_params = page.parts[page.parts.length - 1].params || (() => ({}));
+		const params = get_params(target.match);
+
+		if (error) {
+			const props = {
+				path,
+				query,
+				params,
+				error: typeof error.message === 'string' ? new Error(error.message) : error.message,
+				status: error.statusCode
+			};
+
+			return {
+				data: Object.assign({}, props, {
+					preloading: false,
+					child: {
+						component: ErrorComponent,
+						props
+					}
+				})
+			};
+		}
+
+		const props = { path, query };
+		const data = {
+			path,
+			preloading: false,
+			child: Object.assign({}, root_props.child, {
+				segment: segments[0]
+			})
+		};
+		if (changed(query, root_props.query)) data.query = query;
+		if (changed(params, root_props.params)) data.params = params;
+
+		let level = data.child;
+		let nullable_depth = 0;
+
+		for (let i = 0; i < page.parts.length; i += 1) {
+			const part = page.parts[i];
+			if (!part) continue;
+
+			const get_params = part.params || (() => ({}));
+
+			if (i < changed_from) {
+				level.props.path = path;
+				level.props.query = query;
+				level.props.child = Object.assign({}, level.props.child);
+
+				nullable_depth += 1;
+			} else {
+				level.component = results[i].Component;
+				level.props = Object.assign({}, level.props, props, {
+					params: get_params(target.match),
+				}, results[i].preloaded);
+
+				level.props.child = {};
+			}
+
+			level = level.props.child;
+			level.segment = segments[i + 1];
+		}
+
+		return { data, nullable_depth };
+	});
+}
+
+function load_css(chunk: string) {
+	const href = `client/${chunk}`;
+	if (document.querySelector(`link[href="${href}"]`)) return;
+
+	return new Promise((fulfil, reject) => {
+		const link = document.createElement('link');
+		link.rel = 'stylesheet';
+		link.href = href;
+
+		link.onload = () => fulfil();
+		link.onerror = reject;
+
+		document.head.appendChild(link);
+	});
+}
+
+export function load_component(component: ComponentLoader): Promise<ComponentConstructor> {
+	// TODO this is temporary — once placeholders are
+	// always rewritten, scratch the ternary
+	const promises: Array<Promise<any>> = (typeof component.css === 'string' ? [] : component.css.map(load_css));
+	promises.unshift(component.js());
+	return Promise.all(promises).then(values => values[0].default);
+}
+
+function detach(node: Node) {
+	node.parentNode.removeChild(node);
+}
+
+function changed(a: Record<string, string | true>, b: Record<string, string | true>) {
+	return JSON.stringify(a) !== JSON.stringify(b);
+}

templates/src/client/goto/index.ts

@@ -0,0 +1,13 @@
+import { history, select_route, navigate, cid } from '../app';
+
+export default function goto(href: string, opts = { replaceState: false }) {
+	const target = select_route(new URL(href, document.baseURI));
+
+	if (target) {
+		history[opts.replaceState ? 'replaceState' : 'pushState']({ id: cid }, '', href);
+		return navigate(target, null).then(() => {});
+	}
+
+	location.href = href;
+	return new Promise(f => {}); // never resolves
+}

templates/src/client/index.ts

@@ -0,0 +1,4 @@
+export { default as start } from './start/index';
+export { default as goto } from './goto/index';
+export { default as prefetch } from './prefetch/index';
+export { default as prefetchRoutes } from './prefetchRoutes/index';

templates/src/client/prefetch/index.ts

@@ -0,0 +1,10 @@
+import { select_route, prefetching, set_prefetching, prepare_page } from '../app';
+import { Target } from '../types';
+
+export default function prefetch(href: string) {
+	const target: Target = select_route(new URL(href, document.baseURI));
+
+	if (target && (!prefetching || href !== prefetching.href)) {
+		set_prefetching(href, prepare_page(target));
+	}
+}

templates/src/client/prefetchRoutes/index.ts

@@ -0,0 +1,12 @@
+import { components, pages, load_component } from "../app";
+
+export default function prefetchRoutes(pathnames: string[]) {
+	return pages
+		.filter(route => {
+			if (!pathnames) return true;
+			return pathnames.some(pathname => route.pattern.test(pathname));
+		})
+		.reduce((promise: Promise<any>, route) => promise.then(() => {
+			return Promise.all(route.parts.map(part => part && load_component(components[part.i])));
+		}), Promise.resolve());
+}

templates/src/client/start/index.ts

@@ -0,0 +1,139 @@
+import {
+	cid,
+	history,
+	initial_data,
+	navigate,
+	scroll_history,
+	scroll_state,
+	select_route,
+	set_store,
+	set_target,
+	uid,
+	set_uid,
+	set_cid
+} from '../app';
+import prefetch from '../prefetch/index';
+import { Store } from '../types';
+
+export default function start(opts: {
+	target: Node,
+	store?: (data: any) => Store
+}) {
+	if ('scrollRestoration' in history) {
+		history.scrollRestoration = 'manual';
+	}
+
+	set_target(opts.target);
+	if (opts.store) set_store(opts.store);
+
+	addEventListener('click', handle_click);
+	addEventListener('popstate', handle_popstate);
+
+	// prefetch
+	addEventListener('touchstart', trigger_prefetch);
+	addEventListener('mousemove', handle_mousemove);
+
+	return Promise.resolve().then(() => {
+		const { hash, href } = location;
+
+		const deep_linked = hash && document.getElementById(hash.slice(1));
+		scroll_history[uid] = deep_linked ?
+			{ x: 0, y: deep_linked.getBoundingClientRect().top } :
+			scroll_state();
+
+		history.replaceState({ id: uid }, '', href);
+
+		if (!initial_data.error) {
+			const target = select_route(new URL(location.href));
+			if (target) return navigate(target, uid);
+		}
+	});
+}
+
+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>find_anchor(<Node>event.target);
+	if (!a || a.rel !== 'prefetch') return;
+
+	prefetch(a.href);
+}
+
+function handle_click(event: MouseEvent) {
+	// Adapted from https://github.com/visionmedia/page.js
+	// MIT license https://github.com/visionmedia/page.js#license
+	if (which(event) !== 1) return;
+	if (event.metaKey || event.ctrlKey || event.shiftKey) return;
+	if (event.defaultPrevented) return;
+
+	const a: HTMLAnchorElement | SVGAElement = <HTMLAnchorElement | SVGAElement>find_anchor(<Node>event.target);
+	if (!a) return;
+
+	if (!a.href) return;
+
+	// check if link is inside an svg
+	// in this case, both href and target are always inside an object
+	const svg = typeof a.href === 'object' && a.href.constructor.name === 'SVGAnimatedString';
+	const href = String(svg ? (<SVGAElement>a).href.baseVal : a.href);
+
+	if (href === location.href) {
+		event.preventDefault();
+		return;
+	}
+
+	// Ignore if tag has
+	// 1. 'download' attribute
+	// 2. rel='external' attribute
+	if (a.hasAttribute('download') || a.getAttribute('rel') === 'external') return;
+
+	// Ignore if <a> has a target
+	if (svg ? (<SVGAElement>a).target.baseVal : a.target) return;
+
+	const url = new URL(href);
+
+	// Don't handle hash changes
+	if (url.pathname === location.pathname && url.search === location.search) return;
+
+	const target = select_route(url);
+	if (target) {
+		const noscroll = a.hasAttribute('sapper-noscroll')
+		navigate(target, null, noscroll);
+		event.preventDefault();
+		history.pushState({ id: cid }, '', url.href);
+	}
+}
+
+function which(event: MouseEvent) {
+	return event.which === null ? event.button : event.which;
+}
+
+function find_anchor(node: Node) {
+	while (node && node.nodeName.toUpperCase() !== 'A') node = node.parentNode; // SVG <a> elements have a lowercase name
+	return node;
+}
+
+function handle_popstate(event: PopStateEvent) {
+	scroll_history[cid] = scroll_state();
+
+	if (event.state) {
+		const url = new URL(location.href);
+		const target = select_route(url);
+		if (target) {
+			navigate(target, event.state.id);
+		} else {
+			location.href = location.href;
+		}
+	} else {
+		// hashchange
+		set_uid(uid + 1);
+		set_cid(uid);
+		history.replaceState({ id: cid }, '', location.href);
+	}
+}

templates/src/client/types.ts

@@ -0,0 +1,68 @@
+export type Params = Record<string, string>;
+export type Query = Record<string, string | true>;
+export type RouteData = { params: Params, query: Query, path: string };
+
+type Child = {
+	segment?: string;
+	props?: any;
+	component?: Component;
+};
+
+export type RootProps = {
+	path: string;
+	params: Record<string, string>;
+	query: Record<string, string>;
+	child: Child;
+};
+
+export interface ComponentConstructor {
+	new (options: { target: Node, data: any, store: Store, hydrate: boolean }): Component;
+	preload: (props: { params: Params, query: Query }) => Promise<any>;
+};
+
+export interface Component {
+	set: (data: any) => void;
+	destroy: () => void;
+}
+
+export type ComponentLoader = {
+	js: () => Promise<{ default: ComponentConstructor }>,
+	css: string[]
+};
+
+export type Page = {
+	pattern: RegExp;
+	parts: Array<{
+		i: number;
+		params?: (match: RegExpExecArray) => Record<string, string>;
+	}>;
+};
+
+export type Manifest = {
+	ignore: RegExp[];
+	root: ComponentConstructor;
+	error: () => Promise<{ default: ComponentConstructor }>;
+	pages: Page[]
+};
+
+export type ScrollPosition = {
+	x: number;
+	y: number;
+};
+
+export type Target = {
+	url: URL;
+	path: string;
+	page: Page;
+	match: RegExpExecArray;
+	query: Record<string, string | true>;
+};
+
+export type Redirect = {
+	statusCode: number;
+	location: string;
+};
+
+export type Store = {
+	get: () => any;
+}

templates/src/server/index.ts

@@ -0,0 +1 @@
+export { default as middleware } from './middleware/index';

templates/src/server/middleware/get_page_handler.ts

@@ -0,0 +1,321 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import cookie from 'cookie';
+import devalue from 'devalue';
+import fetch from 'node-fetch';
+import { URL } from 'url';
+import { build_dir, dev, src_dir, IGNORE } from '../placeholders';
+import { Manifest, Page, Props, Req, Res, Store } from './types';
+
+export function get_page_handler(
+	manifest: Manifest,
+	store_getter: (req: Req, res: Res) => Store
+) {
+	const get_build_info = dev
+		? () => JSON.parse(fs.readFileSync(path.join(build_dir, 'build.json'), 'utf-8'))
+		: (assets => () => assets)(JSON.parse(fs.readFileSync(path.join(build_dir, 'build.json'), 'utf-8')));
+
+	const template = dev
+		? () => read_template(src_dir)
+		: (str => () => str)(read_template(build_dir));
+
+	const has_service_worker = fs.existsSync(path.join(build_dir, 'service-worker.js'));
+
+	const { server_routes, pages } = manifest;
+	const error_route = manifest.error;
+
+	function handle_error(req: Req, res: Res, statusCode: number, error: Error | string) {
+		handle_page({
+			pattern: null,
+			parts: [
+				{ name: null, component: error_route }
+			]
+		}, req, res, statusCode, error || new Error('Unknown error in preload function'));
+	}
+
+	function handle_page(page: Page, req: Req, res: Res, status = 200, error: Error | string = null) {
+		const build_info: {
+			bundler: 'rollup' | 'webpack',
+			shimport: string | null,
+			assets: Record<string, string | string[]>,
+			legacy_assets?: Record<string, string>
+		 } = get_build_info();
+
+		res.setHeader('Content-Type', 'text/html');
+		res.setHeader('Cache-Control', dev ? 'no-cache' : 'max-age=600');
+
+		// preload main.js and current route
+		// TODO detect other stuff we can preload? images, CSS, fonts?
+		let preloaded_chunks = Array.isArray(build_info.assets.main) ? build_info.assets.main : [build_info.assets.main];
+		if (!error) {
+			page.parts.forEach(part => {
+				if (!part) return;
+
+				// using concat because it could be a string or an array. thanks webpack!
+				preloaded_chunks = preloaded_chunks.concat(build_info.assets[part.name]);
+			});
+		}
+
+		const link = preloaded_chunks
+			.filter(file => file && !file.match(/\.map$/))
+			.map(file => `<${req.baseUrl}/client/${file}>;rel="preload";as="script"`)
+			.join(', ');
+
+		res.setHeader('Link', link);
+
+		const store = store_getter ? store_getter(req, res) : null;
+
+		let redirect: { statusCode: number, location: string };
+		let preload_error: { statusCode: number, message: Error | string };
+
+		const preload_context = {
+			redirect: (statusCode: number, location: string) => {
+				if (redirect && (redirect.statusCode !== statusCode || redirect.location !== location)) {
+					throw new Error(`Conflicting redirects`);
+				}
+				location = location.replace(/^\//g, ''); // leading slash (only)
+				redirect = { statusCode, location };
+			},
+			error: (statusCode: number, message: Error | string) => {
+				preload_error = { statusCode, message };
+			},
+			fetch: (url: string, opts?: any) => {
+				const parsed = new URL(url, `http://127.0.0.1:${process.env.PORT}${req.baseUrl ? req.baseUrl + '/' :''}`);
+
+				if (opts) {
+					opts = Object.assign({}, opts);
+
+					const include_cookies = (
+						opts.credentials === 'include' ||
+						opts.credentials === 'same-origin' && parsed.origin === `http://127.0.0.1:${process.env.PORT}`
+					);
+
+					if (include_cookies) {
+						if (!opts.headers) opts.headers = {};
+
+						const cookies = Object.assign(
+							{},
+							cookie.parse(req.headers.cookie || ''),
+							cookie.parse(opts.headers.cookie || '')
+						);
+
+						const set_cookie = res.getHeader('Set-Cookie');
+						(Array.isArray(set_cookie) ? set_cookie : [set_cookie]).forEach(str => {
+							const match = /([^=]+)=([^;]+)/.exec(<string>str);
+							if (match) cookies[match[1]] = match[2];
+						});
+
+						const str = Object.keys(cookies)
+							.map(key => `${key}=${cookies[key]}`)
+							.join('; ');
+
+						opts.headers.cookie = str;
+					}
+				}
+
+				return fetch(parsed.href, opts);
+			},
+			store
+		};
+
+		const root_preloaded = manifest.root.preload
+			? manifest.root.preload.call(preload_context, {
+				path: req.path,
+				query: req.query,
+				params: {}
+			})
+			: {};
+
+		const match = error ? null : page.pattern.exec(req.path);
+
+		Promise.all([root_preloaded].concat(page.parts.map(part => {
+			if (!part) return null;
+
+			return part.component.preload
+				? part.component.preload.call(preload_context, {
+					path: req.path,
+					query: req.query,
+					params: part.params ? part.params(match) : {}
+				})
+				: {};
+		}))).catch(err => {
+			preload_error = { statusCode: 500, message: err };
+			return []; // appease TypeScript
+		}).then(preloaded => {
+			if (redirect) {
+				const location = `${req.baseUrl}/${redirect.location}`;
+
+				res.statusCode = redirect.statusCode;
+				res.setHeader('Location', location);
+				res.end();
+
+				return;
+			}
+
+			if (preload_error) {
+				handle_error(req, res, preload_error.statusCode, preload_error.message);
+				return;
+			}
+
+			const serialized = {
+				preloaded: `[${preloaded.map(data => try_serialize(data)).join(',')}]`,
+				store: store && try_serialize(store.get())
+			};
+
+			const segments = req.path.split('/').filter(Boolean);
+
+			const props: Props = {
+				path: req.path,
+				query: req.query,
+				params: {},
+				child: null
+			};
+
+			if (error) {
+				props.error = error instanceof Error ? error : { message: error };
+				props.status = status;
+			}
+
+			const data = Object.assign({}, props, preloaded[0], {
+				params: {},
+				child: {
+					segment: segments[0]
+				}
+			});
+
+			let level = data.child;
+			for (let i = 0; i < page.parts.length; i += 1) {
+				const part = page.parts[i];
+				if (!part) continue;
+
+				const get_params = part.params || (() => ({}));
+
+				Object.assign(level, {
+					component: part.component,
+					props: Object.assign({}, props, {
+						params: get_params(match)
+					}, preloaded[i + 1])
+				});
+
+				level.props.child = <Props["child"]>{
+					segment: segments[i + 1]
+				};
+				level = level.props.child;
+			}
+
+			const { html, head, css } = manifest.root.render(data, {
+				store
+			});
+
+			let script = `__SAPPER__={${[
+				error && `error:1`,
+				`baseUrl:"${req.baseUrl}"`,
+				serialized.preloaded && `preloaded:${serialized.preloaded}`,
+				serialized.store && `store:${serialized.store}`
+			].filter(Boolean).join(',')}};`;
+
+			if (has_service_worker) {
+				script += `if('serviceWorker' in navigator)navigator.serviceWorker.register('${req.baseUrl}/service-worker.js');`;
+			}
+
+			const file = [].concat(build_info.assets.main).filter(file => file && /\.js$/.test(file))[0];
+			const main = `${req.baseUrl}/client/${file}`;
+
+			if (build_info.bundler === 'rollup') {
+				if (build_info.legacy_assets) {
+					const legacy_main = `${req.baseUrl}/client/legacy/${build_info.legacy_assets.main}`;
+					script += `(function(){try{eval("async function x(){}");var main="${main}"}catch(e){main="${legacy_main}"};var s=document.createElement("script");try{new Function("if(0)import('')")();s.src=main;s.type="module";s.crossOrigin="use-credentials";}catch(e){s.src="${req.baseUrl}/client/shimport@${build_info.shimport}.js";s.setAttribute("data-main",main);}document.head.appendChild(s);}());`;
+				} else {
+					script += `var s=document.createElement("script");try{new Function("if(0)import('')")();s.src="${main}";s.type="module";s.crossOrigin="use-credentials";}catch(e){s.src="${req.baseUrl}/client/shimport@${build_info.shimport}.js";s.setAttribute("data-main","${main}")}document.head.appendChild(s)`;
+				}
+			} else {
+				script += `</script><script src="${main}">`;
+			}
+
+			let styles: string;
+
+			// TODO make this consistent across apps
+			// TODO embed build_info in placeholder.ts
+			if (build_info.css && build_info.css.main) {
+				const css_chunks = new Set();
+				if (build_info.css.main) css_chunks.add(build_info.css.main);
+				page.parts.forEach(part => {
+					if (!part) return;
+					const css_chunks_for_part = build_info.css.chunks[part.file];
+
+					if (css_chunks_for_part) {
+						css_chunks_for_part.forEach(file => {
+							css_chunks.add(file);
+						});
+					}
+				});
+
+				styles = Array.from(css_chunks)
+					.map(href => `<link rel="stylesheet" href="client/${href}">`)
+					.join('')
+			} else {
+				styles = (css && css.code ? `<style>${css.code}</style>` : '');
+			}
+
+			// users can set a CSP nonce using res.locals.nonce
+			const nonce_attr = (res.locals && res.locals.nonce) ? ` nonce="${res.locals.nonce}"` : '';
+
+			const body = template()
+				.replace('%sapper.base%', () => `<base href="${req.baseUrl}/">`)
+				.replace('%sapper.scripts%', () => `<script${nonce_attr}>${script}</script>`)
+				.replace('%sapper.html%', () => html)
+				.replace('%sapper.head%', () => `<noscript id='sapper-head-start'></noscript>${head}<noscript id='sapper-head-end'></noscript>`)
+				.replace('%sapper.styles%', () => styles);
+
+			res.statusCode = status;
+			res.end(body);
+		}).catch(err => {
+			if (error) {
+				// we encountered an error while rendering the error page — oops
+				res.statusCode = 500;
+				res.end(`<pre>${escape_html(err.message)}</pre>`);
+			} else {
+				handle_error(req, res, 500, err);
+			}
+		});
+	}
+
+	return function find_route(req: Req, res: Res, next: () => void) {
+		if (req[IGNORE]) return next();
+
+		if (!server_routes.some(route => route.pattern.test(req.path))) {
+			for (const page of pages) {
+				if (page.pattern.test(req.path)) {
+					handle_page(page, req, res);
+					return;
+				}
+			}
+		}
+
+		handle_error(req, res, 404, 'Not found');
+	};
+}
+
+function read_template(dir = build_dir) {
+	return fs.readFileSync(`${dir}/template.html`, 'utf-8');
+}
+
+function try_serialize(data: any) {
+	try {
+		return devalue(data);
+	} catch (err) {
+		return null;
+	}
+}
+
+function escape_html(html: string) {
+	const chars: Record<string, string> = {
+		'"' : 'quot',
+		"'": '#39',
+		'&': 'amp',
+		'<' : 'lt',
+		'>' : 'gt'
+	};
+
+	return html.replace(/["'&<>]/g, c => `&${chars[c]};`);
+}

templates/src/server/middleware/get_server_route_handler.ts

@@ -0,0 +1,78 @@
+import { IGNORE } from '../placeholders';
+import { Req, Res, ServerRoute } from './types';
+
+export function get_server_route_handler(routes: ServerRoute[]) {
+	function handle_route(route: ServerRoute, req: Req, res: Res, next: () => void) {
+		req.params = route.params(route.pattern.exec(req.path));
+
+		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 = route.handlers[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(Buffer.from(chunk));
+					write.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(Buffer.from(chunk));
+					end.apply(res, arguments);
+
+					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_next = (err?: Error) => {
+				if (err) {
+					res.statusCode = 500;
+					res.end(err.message);
+				} else {
+					process.nextTick(next);
+				}
+			};
+
+			try {
+				handle_method(req, res, handle_next);
+			} catch (err) {
+				handle_next(err);
+			}
+		} else {
+			// no matching handler for method
+			process.nextTick(next);
+		}
+	}
+
+	return function find_route(req: Req, res: Res, next: () => void) {
+		if (req[IGNORE]) return next();
+
+		for (const route of routes) {
+			if (route.pattern.test(req.path)) {
+				handle_route(route, req, res, next);
+				return;
+			}
+		}
+
+		next();
+	};
+}

templates/src/server/middleware/index.ts

@@ -0,0 +1,143 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { build_dir, dev, manifest, IGNORE } from '../placeholders';
+import { Handler, Req, Res, Store } from './types';
+import { get_server_route_handler } from './get_server_route_handler';
+import { get_page_handler } from './get_page_handler';
+import { lookup } from './mime';
+
+export default function middleware(opts: {
+	store?: (req: Req, res: Res) => Store,
+	ignore?: any
+} = {}) {
+	const { store, ignore } = opts;
+
+	let emitted_basepath = false;
+
+	return compose_handlers([
+		ignore && ((req: Req, res: Res, next: () => void) => {
+			req[IGNORE] = should_ignore(req.path, ignore);
+			next();
+		}),
+
+		(req: Req, res: Res, next: () => void) => {
+			if (req[IGNORE]) return next();
+
+			if (req.baseUrl === undefined) {
+				let { originalUrl } = req;
+				if (req.url === '/' && originalUrl[originalUrl.length - 1] !== '/') {
+					originalUrl += '/';
+				}
+
+				req.baseUrl = originalUrl
+					? originalUrl.slice(0, -req.url.length)
+					: '';
+			}
+
+			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(/\?.*/, '');
+			}
+
+			next();
+		},
+
+		fs.existsSync(path.join(build_dir, 'index.html')) && serve({
+			pathname: '/index.html',
+			cache_control: dev ? 'no-cache' : 'max-age=600'
+		}),
+
+		fs.existsSync(path.join(build_dir, 'service-worker.js')) && serve({
+			pathname: '/service-worker.js',
+			cache_control: 'no-cache, no-store, must-revalidate'
+		}),
+
+		fs.existsSync(path.join(build_dir, 'service-worker.js.map')) && serve({
+			pathname: '/service-worker.js.map',
+			cache_control: 'no-cache, no-store, must-revalidate'
+		}),
+
+		serve({
+			prefix: '/client/',
+			cache_control: dev ? 'no-cache' : 'max-age=31536000, immutable'
+		}),
+
+		get_server_route_handler(manifest.server_routes),
+
+		get_page_handler(manifest, store)
+	].filter(Boolean));
+}
+
+export function compose_handlers(handlers: Handler[]) {
+	return (req: Req, res: Res, next: () => void) => {
+		let i = 0;
+		function go() {
+			const handler = handlers[i];
+
+			if (handler) {
+				handler(req, res, () => {
+					i += 1;
+					go();
+				});
+			} else {
+				next();
+			}
+		}
+
+		go();
+	};
+}
+
+export function should_ignore(uri: string, val: any) {
+	if (Array.isArray(val)) return val.some(x => should_ignore(uri, x));
+	if (val instanceof RegExp) return val.test(uri);
+	if (typeof val === 'function') return val(uri);
+	return uri.startsWith(val.charCodeAt(0) === 47 ? val : `/${val}`);
+}
+
+export function serve({ prefix, pathname, cache_control }: {
+	prefix?: string,
+	pathname?: string,
+	cache_control: string
+}) {
+	const filter = pathname
+		? (req: Req) => req.path === pathname
+		: (req: Req) => req.path.startsWith(prefix);
+
+	const cache: Map<string, Buffer> = new Map();
+
+	const read = dev
+		? (file: string) => fs.readFileSync(path.resolve(build_dir, file))
+		: (file: string) => (cache.has(file) ? cache : cache.set(file, fs.readFileSync(path.resolve(build_dir, file)))).get(file)
+
+	return (req: Req, res: Res, next: () => void) => {
+		if (req[IGNORE]) return next();
+
+		if (filter(req)) {
+			const type = lookup(req.path);
+
+			try {
+				const file = decodeURIComponent(req.path.slice(1));
+				const data = read(file);
+
+				res.setHeader('Content-Type', type);
+				res.setHeader('Cache-Control', cache_control);
+				res.end(data);
+			} catch (err) {
+				res.statusCode = 404;
+				res.end('not found');
+			}
+		} else {
+			next();
+		}
+	};
+}

templates/src/server/middleware/types.ts

@@ -0,0 +1,69 @@
+import { ClientRequest, ServerResponse } from 'http';
+
+export type ServerRoute = {
+	pattern: RegExp;
+	handlers: Record<string, Handler>;
+	params: (match: RegExpMatchArray) => Record<string, string>;
+};
+
+export type Page = {
+	pattern: RegExp;
+	parts: Array<{
+		name: string;
+		component: Component;
+		params?: (match: RegExpMatchArray) => Record<string, string>;
+	}>
+};
+
+export type Manifest = {
+	server_routes: ServerRoute[];
+	pages: Page[];
+	root: Component;
+	error: Component;
+}
+
+export type Handler = (req: Req, res: Res, next: () => void) => void;
+
+export type Store = {
+	get: () => any
+};
+
+export type Props = {
+	path: string;
+	query: Record<string, string>;
+	params: Record<string, string>;
+	error?: { message: string };
+	status?: number;
+	child: {
+		segment: string;
+		component: Component;
+		props: Props;
+	};
+	[key: string]: any;
+};
+
+export interface Req extends ClientRequest {
+	url: string;
+	baseUrl: string;
+	originalUrl: string;
+	method: string;
+	path: string;
+	params: Record<string, string>;
+	query: Record<string, string>;
+	headers: Record<string, string>;
+}
+
+export interface Res extends ServerResponse {
+	write: (data: any) => void;
+}
+
+export { ServerResponse };
+
+interface Component {
+	render: (data: any, opts: { store: Store }) => {
+		head: string;
+		css: { code: string, map: any };
+		html: string
+	},
+	preload: (data: any) => any | Promise<any>
+}

templates/src/server/placeholders.ts

@@ -0,0 +1,11 @@
+import { Manifest } from './types';
+
+export const manifest: Manifest = __MANIFEST__;
+
+export const build_dir = __BUILD__DIR__;
+
+export const src_dir = __SRC__DIR__;
+
+export const dev = __DEV__;
+
+export const IGNORE = '__SAPPER__IGNORE__';

test/app/app/App.html

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

test/app/app/client.js

@@ -1,15 +0,0 @@
-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({
-		target: document.querySelector('#sapper'),
-		App,
-		routes,
-		store: data => new Store(data)
-	});
-};
-
-window.prefetchRoutes = prefetchRoutes;

test/app/routes/credentials/test.json.js

@@ -1,28 +0,0 @@
-export function get(req, res) {
-	const cookies = req.headers.cookie
-		? req.headers.cookie.split(/,\s+/).reduce((cookies, cookie) => {
-			const [pair] = cookie.split('; ');
-			const [name, value] = pair.split('=');
-			cookies[name] = value;
-			return cookies;
-		}, {})
-		: {};
-
-	if (cookies.test) {
-		res.writeHead(200, {
-			'Content-Type': 'application/json'
-		});
-
-		res.end(JSON.stringify({
-			message: cookies.test
-		}));
-	} else {
-		res.writeHead(403, {
-			'Content-Type': 'application/json'
-		});
-
-		res.end(JSON.stringify({
-			message: 'unauthorized'
-		}));
-	}
-}

test/app/routes/fünke.html

@@ -1 +0,0 @@
-<h1>I'm afraid I just blue myself</h1>

test/app/routes/show-url.html

@@ -1,9 +0,0 @@
-<p>URL is {url}</p>
-
-<script>
-	export default {
-		preload({ url }) {
-			if (url) return { url };
-		}
-	};
-</script>

test/app/src/client.js

@@ -0,0 +1,12 @@
+import { Store } from 'svelte/store.js';
+import * as sapper from '../__sapper__/client.js';
+
+window.init = () => {
+	return sapper.start({
+		target: document.querySelector('#sapper'),
+		store: data => new Store(data)
+	});
+};
+
+window.prefetchRoutes = sapper.prefetchRoutes;
+window.goto = sapper.goto;

test/app/src/routes/[x]/[y]/[z].html

@@ -0,0 +1,20 @@
+<span>z: {segment} {count}</span>
+<a href="foo/bar/qux"></a>
+
+<script>
+	import counts from '../_counts.js';
+
+	export default {
+		preload() {
+			return {
+				count: counts.z += 1
+			};
+		},
+
+		oncreate() {
+			this.set({
+				segment: this.get().params.z
+			});
+		}
+	};
+</script>

test/app/src/routes/[x]/[y]/_layout.html

@@ -0,0 +1,22 @@
+<span>y: {segment} {count}</span>
+<svelte:component this={child.component} {...child.props}/>
+
+<span>child segment: {child.segment}</span>
+
+<script>
+	import counts from '../_counts.js';
+
+	export default {
+		preload() {
+			return {
+				count: counts.y += 1
+			};
+		},
+
+		oncreate() {
+			this.set({
+				segment: this.get().params.y
+			});
+		}
+	};
+</script>

test/app/src/routes/[x]/_counts.js

@@ -0,0 +1,5 @@
+export default {
+	x: process.browser ? 1 : 0,
+	y: process.browser ? 1 : 0,
+	z: process.browser ? 1 : 0
+};

test/app/src/routes/_layout.html

@@ -0,0 +1,15 @@
+{#if preloading}
+	<progress class='preloading-progress' value=0.5/>
+{/if}
+
+<svelte:component this={child.component} {rootPreloadFunctionRan} {...child.props}/>
+
+<script>
+	export default {
+		preload() {
+			return {
+				rootPreloadFunctionRan: true
+			};
+		}
+	};
+</script>

test/app/src/routes/about.html

@@ -9,17 +9,9 @@
 <button class='prefetch' on:click='prefetch("blog/why-the-name")'>Why the name?</button>
 
 <script>
-	import { goto, prefetch } from '../../../runtime.js';
+	import { prefetch } from '../../__sapper__/client.js';
 
 	export default {
-		oncreate() {
-			window.goto = goto;
-		},
-
-		ondestroy() {
-			window.goto = null;
-		},
-
 		methods: {
 			prefetch
 		}

test/app/src/routes/blog/_posts.js

@@ -97,6 +97,9 @@ const posts = [
 			<p>Nellie is blowing them all AWAY. I will be a bigger and hairier mole than the one on your inner left thigh! I'll sacrifice anything for my children.</p>
 			<p>Up yours, granny! You couldn't handle it! Hey, Dad. Look at you. You're a year older…and a year closer to death. Buster: Oh yeah, I guess that's kind of funny. Bob Loblaw Law Blog. The guy runs a prison, he can have any piece of ass he wants.</p>
 
+			<p><a href="blog/another-long-post">clicking this link should reset scroll</a></p>
+			<p><a href="blog/another-long-post" sapper-noscroll>clicking this link should not affect scroll</a></p>
+
 			<h2 id='three'>Three</h2>
 			<p>I prematurely shot my wad on what was supposed to be a dry run, so now I'm afraid I have something of a mess on my hands. Dead Dove DO NOT EAT. Never once touched my per diem. I'd go to Craft Service, get some raw veggies, bacon, Cup-A-Soup…baby, I got a stew goin'. You're losing blood, aren't you? Gob: Probably, my socks are wet. Sure, let the little fruit do it. HUZZAH! Although George Michael had only got to second base, he'd gone in head first, like Pete Rose. I will pack your sweet pink mouth with so much ice cream you'll be the envy of every Jerry and Jane on the block!</p>
 			<p>Gosh Mom… after all these years, God's not going to take a call from you. Come on, this is a Bluth family celebration. It's no place for children.</p>
@@ -106,6 +109,38 @@ const posts = [
 			<p>If you didn't have adult onset diabetes, I wouldn't mind giving you a little sugar. Everybody dance NOW. And the soup of the day is bread. Great, now I'm gonna smell to high heaven like a tuna melt!</p>
 			<p>That's how Tony Wonder lost a nut. She calls it a Mayonegg. Go ahead, touch the Cornballer. There's a new daddy in town. A discipline daddy.</p>
 		`
+	},
+
+	{
+		title: 'Another long post',
+		slug: 'another-long-post',
+		html: `
+			<h2 id='one'>One</h2>
+			<p>I'll have a vodka rocks. (Mom, it's breakfast time.) And a piece of toast. Let me out that Queen. Fried cheese… with club sauce.</p>
+			<p>Her lawyers are claiming the seal is worth $250,000. And that's not even including Buster's Swatch. This was a big get for God. What, so the guy we are meeting with can't even grow his own hair? COME ON! She's always got to wedge herself in the middle of us so that she can control everything. Yeah. Mom's awesome. It's, like, Hey, you want to go down to the whirlpool? Yeah, I don't have a husband. I call it Swing City. The CIA should've just Googled for his hideout, evidently. There are dozens of us! DOZENS! Yeah, like I'm going to take a whiz through this $5,000 suit. COME ON.</p>
+
+			<h2 id='two'>Two</h2>
+			<p>Tobias Fünke costume. Heart attack never stopped old big bear.</p>
+			<p>Nellie is blowing them all AWAY. I will be a bigger and hairier mole than the one on your inner left thigh! I'll sacrifice anything for my children.</p>
+			<p>Up yours, granny! You couldn't handle it! Hey, Dad. Look at you. You're a year older…and a year closer to death. Buster: Oh yeah, I guess that's kind of funny. Bob Loblaw Law Blog. The guy runs a prison, he can have any piece of ass he wants.</p>
+
+			<h2 id='three'>Three</h2>
+			<p>I prematurely shot my wad on what was supposed to be a dry run, so now I'm afraid I have something of a mess on my hands. Dead Dove DO NOT EAT. Never once touched my per diem. I'd go to Craft Service, get some raw veggies, bacon, Cup-A-Soup…baby, I got a stew goin'. You're losing blood, aren't you? Gob: Probably, my socks are wet. Sure, let the little fruit do it. HUZZAH! Although George Michael had only got to second base, he'd gone in head first, like Pete Rose. I will pack your sweet pink mouth with so much ice cream you'll be the envy of every Jerry and Jane on the block!</p>
+			<p>Gosh Mom… after all these years, God's not going to take a call from you. Come on, this is a Bluth family celebration. It's no place for children.</p>
+			<p>And I wouldn't just lie there, if that's what you're thinking. That's not what I WAS thinking. Who? i just dont want him to point out my cracker ass in front of ann. When a man needs to prove to a woman that he's actually… When a man loves a woman… Heyyyyyy Uncle Father Oscar. [Stabbing Gob] White power! Gob: I'm white! Let me take off my assistant's skirt and put on my Barbra-Streisand-in-The-Prince-of-Tides ass-masking therapist pantsuit. In the mid '90s, Tobias formed a folk music band with Lindsay and Maebe which he called Dr. Funke's 100 Percent Natural Good Time Family Band Solution. The group was underwritten by the Natural Food Life Company, a division of Chem-Grow, an Allen Crayne acqusition, which was part of the Squimm Group. Their motto was simple: We keep you alive.</p>
+
+			<h2 id='four'>Four</h2>
+			<p>If you didn't have adult onset diabetes, I wouldn't mind giving you a little sugar. Everybody dance NOW. And the soup of the day is bread. Great, now I'm gonna smell to high heaven like a tuna melt!</p>
+			<p>That's how Tony Wonder lost a nut. She calls it a Mayonegg. Go ahead, touch the Cornballer. There's a new daddy in town. A discipline daddy.</p>
+		`
+	},
+
+	{
+		title: 'Encödïng test',
+		slug: 'encödïng-test',
+		html: `
+			<p>It works</p>
+		`
 	}
 ];
 

test/app/src/routes/const.html

@@ -0,0 +1 @@
+<h1>reserved words are okay as routes</h1>

test/app/src/routes/credentials/test.json.js

@@ -0,0 +1,23 @@
+import cookie from 'cookie';
+
+export function get(req, res) {
+	if (req.headers.cookie) {
+		const cookies = cookie.parse(req.headers.cookie);
+
+		res.writeHead(200, {
+			'Content-Type': 'application/json'
+		});
+
+		res.end(JSON.stringify({
+			message: `a: ${cookies.a}, b: ${cookies.b}, max-age: ${cookies['max-age']}`
+		}));
+	} else {
+		res.writeHead(403, {
+			'Content-Type': 'application/json'
+		});
+
+		res.end(JSON.stringify({
+			message: 'unauthorized'
+		}));
+	}
+}

test/app/src/routes/echo/page/[slug].html

@@ -0,0 +1,12 @@
+<h1>{slug} ({message})</h1>
+
+<script>
+	export default {
+		preload({ params, query }) {
+			return {
+				slug: params.slug,
+				message: query.message
+			};
+		}
+	};
+</script>

test/app/src/routes/echo/server-route/[slug].js

@@ -0,0 +1,15 @@
+export function get(req, res) {
+	res.writeHead(200, {
+		'Content-Type': 'text/html'
+	});
+
+	res.end(`
+		<!doctype html>
+		<html>
+			<head><meta charset="utf-8"></head>
+			<body>
+				<h1>${req.params.slug}</h1>
+			</body>
+		</html>
+	`);
+}

test/app/src/routes/fünke.html

@@ -0,0 +1,11 @@
+<h1>{phrase}</h1>
+
+<script>
+	export default {
+		preload() {
+			return this.fetch('fünke.json').then(r => r.json()).then(phrase => {
+				return { phrase };
+			});
+		}
+	};
+</script>

test/app/src/routes/fünke.json.js

@@ -0,0 +1,9 @@
+export function get(req, res) {
+	res.writeHead(200, {
+		'Content-Type': 'application/json'
+	});
+
+	res.end(JSON.stringify(
+		"I'm afraid I just blue myself"
+	));
+}

test/app/src/routes/index.html

@@ -7,11 +7,16 @@
 <a href='.'>home</a>
 <a href='about'>about</a>
 <a href='slow-preload'>slow preload</a>
+<a href='non-sapper-redirect-from'>redirect</a>
 <a href='redirect-from'>redirect</a>
+<a href='redirect-root'>redirect (root)</a>
 <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 href="const">const</a>
+<a href="echo/page/encöded?message=hëllö+wörld">echo/page/encöded?message=hëllö+wörld</a>
+<a href="echo/page/empty?message">echo/page/empty?message</a>
 
 <div class='hydrate-test'></div>
 

test/app/src/routes/missing-index/ok.html

@@ -0,0 +1 @@
+<h1>it works</h1>