update lockfile

Ensure deepest layout is always refreshed on goto

CHANGELOG.md

@@ -1,5 +1,21 @@
 # sapper changelog
 
+## 0.25.1
+
+* Fix style injection for webpack apps ([#622](https://github.com/sveltejs/sapper/pull/622))
+
+## 0.25.0
+
+* Force refresh on `goto(current_url)` ([#484](https://github.com/sveltejs/sapper/pull/484))
+* Fix preloading navigation bug ([#532](https://github.com/sveltejs/sapper/issues/532))
+* Don't mutate opts.headers ([#528](https://github.com/sveltejs/sapper/issues/528))
+* Don't crawl hundreds of pages simultaneously ([#369](https://github.com/sveltejs/sapper/pull/369))
+
+## 0.24.3
+
+* Add service-worker-index.html shell file for offline support ([#422](https://github.com/sveltejs/sapper/issues/422))
+* Don't cache .map files ([#534](https://github.com/sveltejs/sapper/issues/534))
+
 ## 0.24.2
 
 * Support Rollup 1.0 ([#541](https://github.com/sveltejs/sapper/pull/541))

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "sapper",
-  "version": "0.24.0",
+  "version": "0.25.1",
   "lockfileVersion": 1,
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@@ -964,7 +964,7 @@
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@@ -1001,7 +1001,7 @@
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@@ -1035,7 +1035,7 @@
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@@ -1487,7 +1487,7 @@
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@@ -1678,7 +1678,7 @@
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@@ -2416,25 +2425,29 @@
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@@ -2565,7 +2589,8 @@
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         "safer-buffer": {
           "version": "2.1.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
           "dev": true,
           "optional": true
         },
         "sax": {
           "version": "1.2.4",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==",
           "dev": true,
           "optional": true
         },
         "semver": {
           "version": "5.5.0",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==",
           "dev": true,
           "optional": true
         },
         "set-blocking": {
           "version": "2.0.0",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-BF+XgtARrppoA93TgrJDkrPYkPc=",
           "dev": true,
           "optional": true
         },
         "signal-exit": {
           "version": "3.0.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=",
           "dev": true,
           "optional": true
         },
         "string-width": {
           "version": "1.0.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
           "dev": true,
           "optional": true,
           "requires": {
@@ -2801,7 +2851,8 @@
         },
         "string_decoder": {
           "version": "1.1.1",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
           "dev": true,
           "optional": true,
           "requires": {
@@ -2810,7 +2861,8 @@
         },
         "strip-ansi": {
           "version": "3.0.1",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "dev": true,
           "requires": {
             "ansi-regex": "^2.0.0"
@@ -2818,13 +2870,15 @@
         },
         "strip-json-comments": {
           "version": "2.0.1",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo=",
           "dev": true,
           "optional": true
         },
         "tar": {
           "version": "4.4.1",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha512-O+v1r9yN4tOsvl90p5HAP4AEqbYhx4036AGMm075fH9F8Qwi3oJ+v4u50FkT/KkvywNGtwkk0zRI+8eYm1X/xg==",
           "dev": true,
           "optional": true,
           "requires": {
@@ -2839,13 +2893,15 @@
         },
         "util-deprecate": {
           "version": "1.0.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
           "dev": true,
           "optional": true
         },
         "wide-align": {
           "version": "1.1.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha512-ijDLlyQ7s6x1JgCLur53osjm/UXUYD9+0PbYKrBsYisYXzCxN+HC3mYDNy/dWdmf3AwqwU3CXwDCvsNgGK1S0w==",
           "dev": true,
           "optional": true,
           "requires": {
@@ -2854,12 +2910,14 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
           "dev": true
         },
         "yallist": {
           "version": "3.0.2",
-          "bundled": true,
+          "resolved": false,
+          "integrity": "sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k=",
           "dev": true
         }
       }
@@ -3518,7 +3576,7 @@
     },
     "load-json-file": {
       "version": "2.0.0",
-      "resolved": "http://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
       "integrity": "sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=",
       "dev": true,
       "requires": {
@@ -3745,7 +3803,7 @@
     },
     "minimist": {
       "version": "0.0.8",
-      "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
       "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
       "dev": true
     },
@@ -3790,7 +3848,7 @@
     },
     "mkdirp": {
       "version": "0.5.1",
-      "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
       "dev": true,
       "requires": {
@@ -3818,7 +3876,7 @@
       "dependencies": {
         "commander": {
           "version": "2.15.1",
-          "resolved": "http://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
           "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
           "dev": true
         },
@@ -4674,7 +4732,7 @@
     },
     "readable-stream": {
       "version": "2.3.6",
-      "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
       "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
       "dev": true,
       "requires": {
@@ -5187,7 +5245,7 @@
         },
         "rollup-pluginutils": {
           "version": "1.5.2",
-          "resolved": "http://registry.npmjs.org/rollup-pluginutils/-/rollup-pluginutils-1.5.2.tgz",
+          "resolved": "https://registry.npmjs.org/rollup-pluginutils/-/rollup-pluginutils-1.5.2.tgz",
           "integrity": "sha1-HhVud4+UtyVb+hs9AXi+j1xVJAg=",
           "dev": true,
           "requires": {
@@ -5356,7 +5414,7 @@
     },
     "sha.js": {
       "version": "2.4.11",
-      "resolved": "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
       "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
       "dev": true,
       "requires": {
@@ -5825,7 +5883,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
@@ -6639,6 +6697,12 @@
       "resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
       "integrity": "sha1-5a2ryKz0CPY4X8dklWhMiOavaJo=",
       "dev": true
+    },
+    "yootils": {
+      "version": "0.0.14",
+      "resolved": "https://registry.npmjs.org/yootils/-/yootils-0.0.14.tgz",
+      "integrity": "sha512-yWoA/a/4aVUp5nqfqdjbTdyXcR8d0OAbRQ8Ktu3ZsfQnArwLpS81oqZl3adIszX3p8NEhT0aNHARPsaTwBH/Qw==",
+      "dev": true
     }
   }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sapper",
-  "version": "0.24.2",
+  "version": "0.25.1",
   "description": "Military-grade apps, engineered by Svelte",
   "bin": {
     "sapper": "./sapper"
@@ -63,7 +63,8 @@
     "ts-node": "^7.0.1",
     "typescript": "^3.1.3",
     "webpack": "^4.20.2",
-    "webpack-format-messages": "^2.0.3"
+    "webpack-format-messages": "^2.0.3",
+    "yootils": "0.0.14"
   },
   "scripts": {
     "test": "mocha --opts mocha.opts",

src/api/build.ts

@@ -42,7 +42,6 @@ export async function build({
 	routes = path.resolve(cwd, routes);
 	output = path.resolve(cwd, output);
 	static_files = path.resolve(cwd, static_files);
-	dest = path.resolve(cwd, dest);
 
 	if (legacy && bundler === 'webpack') {
 		throw new Error(`Legacy builds are not supported for projects using webpack`);
@@ -116,10 +115,15 @@ export async function build({
 	let serviceworker_stats;
 
 	if (serviceworker) {
+
+		const client_files = client_result.chunks
+			.filter(chunk => !chunk.file.endsWith('.map')) // SW does not need to cache sourcemap files
+			.map(chunk => `client/${chunk.file}`);
+
 		create_serviceworker_manifest({
 			manifest_data,
 			output,
-			client_files: client_result.chunks.map(chunk => `client/${chunk.file}`),
+			client_files,
 			static_files
 		});
 

src/api/export.ts

@@ -3,6 +3,7 @@ import * as path from 'path';
 import * as sander from 'sander';
 import * as url from 'url';
 import fetch from 'node-fetch';
+import * as yootils from 'yootils';
 import * as ports from 'port-authority';
 import clean_html from './utils/clean_html';
 import minify_html from './utils/minify_html';
@@ -94,7 +95,9 @@ async function _export({
 		const is_html = type === 'text/html';
 
 		if (is_html) {
-			file = file === '' ? 'index.html' : `${file}/index.html`;
+			if (pathname !== '/service-worker-index.html') {
+				file = file === '' ? 'index.html' : `${file}/index.html`;
+			}
 			body = minify_html(body);
 		}
 
@@ -113,7 +116,10 @@ async function _export({
 	});
 
 	async function handle(url: URL) {
-		const pathname = (url.pathname.replace(root.pathname, '') || '/');
+		let pathname = url.pathname;
+		if (pathname !== '/service-worker-index.html') {
+		  pathname = pathname.replace(root.pathname, '') || '/'
+		}
 
 		if (seen.has(pathname)) return;
 		seen.add(pathname);
@@ -138,11 +144,12 @@ async function _export({
 		const range = ~~(r.status / 100);
 
 		if (range === 2) {
-			if (type === 'text/html') {
+			if (type === 'text/html' && pathname !== '/service-worker-index.html') {
-				const urls: URL[] = [];
-
 				const cleaned = clean_html(body);
 
+				const q = yootils.queue(8);
+				let promise;
+
 				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);
@@ -158,12 +165,12 @@ async function _export({
 						const url = resolve(base.href, href);
 
 						if (url.protocol === protocol && url.host === host) {
-							urls.push(url);
+							promise = q.add(() => handle(url));
 						}
 					}
 				}
 
-				await Promise.all(urls.map(handle));
+				await promise;
 			}
 		}
 
@@ -181,6 +188,7 @@ async function _export({
 
 	return ports.wait(port)
 		.then(() => handle(root))
+		.then(() => handle(resolve(root.href, 'service-worker-index.html')))
 		.then(() => proc.kill())
 		.catch(err => {
 			proc.kill();

src/core/create_compilers/WebpackResult.ts

@@ -1,6 +1,6 @@
 import format_messages from 'webpack-format-messages';
 import { CompileResult, BuildInfo, CompileError, Chunk, CssFile } from './interfaces';
-import { ManifestData, Dirs } from '../../interfaces';
+import { ManifestData, Dirs, PageComponent } from '../../interfaces';
 
 const locPattern = /\((\d+):(\d+)\)$/;
 
@@ -9,7 +9,7 @@ function munge_warning_or_error(message: string) {
 	const lines = message.split('\n');
 
 	const file = lines.shift()
-		.replace('', '') // careful — there is a special character at the beginning of this string
+		.replace('', '') // careful — there is a special character at the beginning of this string
 		.replace('', '')
 		.replace('./', '');
 
@@ -66,12 +66,15 @@ export default class WebpackResult implements CompileResult {
 			assets: this.assets,
 			css: {
 				main: extract_css(this.assets.main),
-				chunks: Object
+				chunks: manifest_data.components
-					.keys(this.assets)
+					.reduce((chunks: Record<string, string[]>, component: PageComponent) => {
-					.filter(chunkName => chunkName !== 'main')
+						const css_dependencies = [];
-					.reduce((chunks: { [key: string]: string }, chukName) => {
+						const css = extract_css(this.assets[component.name]);
-						const assets = this.assets[chukName];
+
-						chunks[chukName] = extract_css(assets);
+						if (css) css_dependencies.push(css);
+
+						chunks[component.file] = css_dependencies;
+
 						return chunks;
 					}, {})
 			}

src/core/create_manifests.ts

@@ -45,17 +45,15 @@ export function create_serviceworker_manifest({ manifest_data, output, client_fi
 	client_files: string[];
 	static_files: string;
 }) {
-	let files: string[];
+	let files: string[] = ['/service-worker-index.html'];
 
 	if (fs.existsSync(static_files)) {
-		files = walk(static_files);
+		files = files.concat(walk(static_files));
 	} else {
 		// TODO remove in a future version
 		if (fs.existsSync('assets')) {
 			throw new Error(`As of Sapper 0.21, the assets/ directory should become static/`);
 		}
-
-		files = [];
 	}
 
 	let code = `

templates/src/client/app.ts

@@ -36,7 +36,7 @@ const root_props: RootProps = {
 
 export let prefetching: {
 	href: string;
-	promise: Promise<{ redirect?: Redirect, data?: any, nullable_depth?: number }>;
+	promise: Promise<{ redirect?: Redirect, data?: any, nullable_depth?: number, new_segments?: any }>;
 } = null;
 export function set_prefetching(href, promise) {
 	prefetching = { href, promise };
@@ -137,10 +137,13 @@ export function navigate(target: Target, id: number, noscroll?: boolean, hash?:
 
 	const token = current_token = {};
 
-	return loaded.then(({ redirect, data, nullable_depth }) => {
+	return loaded.then(({ redirect, data, nullable_depth, new_segments }) => {
 		if (redirect) {
 			return goto(redirect.location, { replaceState: true });
 		}
+		if (new_segments) {
+			segments = new_segments;
+		}
 		render(data, nullable_depth, scroll_history[id], noscroll, hash, token);
 		if (document.activeElement) document.activeElement.blur();
 	});
@@ -220,6 +223,10 @@ export function prepare_page(target: Target): Promise<{
 		segments[changed_from] === new_segments[changed_from]
 	) changed_from += 1;
 
+	if (changed_from === new_segments.length) {
+		changed_from -= 1;
+	}
+
 	let redirect: Redirect = null;
 	let error: { statusCode: number, message: Error | string } = null;
 
@@ -285,11 +292,9 @@ export function prepare_page(target: Target): Promise<{
 		}
 	}).then(results => {
 		if (redirect) {
-			return { redirect };
+			return { redirect, new_segments };
 		}
 
-		segments = new_segments;
-
 		const get_params = page.parts[page.parts.length - 1].params || (() => ({}));
 		const params = get_params(target.match);
 
@@ -303,6 +308,7 @@ export function prepare_page(target: Target): Promise<{
 			};
 
 			return {
+				new_segments,
 				data: Object.assign({}, props, {
 					preloading: false,
 					child: {
@@ -318,7 +324,7 @@ export function prepare_page(target: Target): Promise<{
 			path,
 			preloading: false,
 			child: Object.assign({}, root_props.child, {
-				segment: segments[0]
+				segment: new_segments[0]
 			})
 		};
 		if (changed(query, root_props.query)) data.query = query;
@@ -349,10 +355,10 @@ export function prepare_page(target: Target): Promise<{
 			}
 
 			level = level.props.child;
-			level.segment = segments[i + 1];
+			level.segment = new_segments[i + 1];
 		}
 
-		return { data, nullable_depth };
+		return { data, nullable_depth, new_segments };
 	});
 }
 
@@ -386,4 +392,4 @@ function detach(node: Node) {
 
 function changed(a: Record<string, string | true>, b: Record<string, string | true>) {
 	return JSON.stringify(a) !== JSON.stringify(b);
-}
+}

templates/src/server/middleware/get_page_handler.ts

@@ -34,6 +34,7 @@ export function get_page_handler(
 	}
 
 	async function handle_page(page: Page, req: Req, res: Res, status = 200, error: Error | string = null) {
+		const isSWIndexHtml = req.path === '/service-worker-index.html';
 		const build_info: {
 			bundler: 'rollup' | 'webpack',
 			shimport: string | null,
@@ -47,7 +48,7 @@ export function get_page_handler(
 		// 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) {
+		if (!error && !isSWIndexHtml) {
 			page.parts.forEach(part => {
 				if (!part) return;
 
@@ -104,7 +105,7 @@ export function get_page_handler(
 					);
 
 					if (include_cookies) {
-						if (!opts.headers) opts.headers = {};
+						opts.headers = Object.assign({}, opts.headers);
 
 						const cookies = Object.assign(
 							{},
@@ -145,17 +146,22 @@ export function get_page_handler(
 
 			match = error ? null : page.pattern.exec(req.path);
 
-			preloaded = await Promise.all([root_preloaded].concat(page.parts.map(part => {
+			let toPreload = [root_preloaded];
-				if (!part) return null;
+			if (!isSWIndexHtml) {
+				toPreload = toPreload.concat(page.parts.map(part => {
+					if (!part) return null;
 
-				return part.component.preload
+					return part.component.preload
-					? part.component.preload.call(preload_context, {
+						? part.component.preload.call(preload_context, {
-						path: req.path,
+							path: req.path,
-						query: req.query,
+							query: req.query,
-						params: part.params ? part.params(match) : {}
+							params: part.params ? part.params(match) : {}
-					})
+						})
-					: {};
+						: {};
-			})));
+				}))
+			}
+
+			preloaded = await Promise.all(toPreload);
 		} catch (err) {
 			preload_error = { statusCode: 500, message: err };
 			preloaded = []; // appease TypeScript
@@ -204,23 +210,29 @@ export function get_page_handler(
 			});
 
 			let level = data.child;
-			for (let i = 0; i < page.parts.length; i += 1) {
+			if (isSWIndexHtml) {
-				const part = page.parts[i];
+				level.props = Object.assign({}, props, {
-				if (!part) continue;
+					params: {}
+				})
+			} else {
+				for (let i = 0; i < page.parts.length; i += 1) {
+					const part = page.parts[i];
+					if (!part) continue;
 
-				const get_params = part.params || (() => ({}));
+					const get_params = part.params || (() => ({}));
 
-				Object.assign(level, {
+					Object.assign(level, {
-					component: part.component,
+						component: part.component,
-					props: Object.assign({}, props, {
+						props: Object.assign({}, props, {
-						params: get_params(match)
+							params: get_params(match)
-					}, preloaded[i + 1])
+						}, preloaded[i + 1])
-				});
+					});
 
-				level.props.child = <Props["child"]>{
+					level.props.child = <Props["child"]>{
-					segment: segments[i + 1]
+						segment: segments[i + 1]
-				};
+					};
-				level = level.props.child;
+					level = level.props.child;
+				}
 			}
 
 			const { html, head, css } = manifest.root.render(data, {
@@ -303,6 +315,12 @@ export function get_page_handler(
 	return function find_route(req: Req, res: Res, next: () => void) {
 		if (req[IGNORE]) return next();
 
+		if (req.path === '/service-worker-index.html') {
+			const homePage = pages.find(page => page.pattern.test('/'));
+			handle_page(homePage, req, res);
+			return;
+		}
+
 		if (!server_routes.some(route => route.pattern.test(req.path))) {
 			for (const page of pages) {
 				if (page.pattern.test(req.path)) {

test/apps/export/test.ts

@@ -30,6 +30,7 @@ describe('export', function() {
 			'blog/index.html',
 			'global.css',
 			'index.html',
+			'service-worker-index.html',
 			'service-worker.js'
 		]);
 	});

test/apps/preloading/src/routes/index.html

@@ -1,4 +1,6 @@
 <h1>Great success!</h1>
 
 <a href="slow-preload">slow preload</a>
-<a href="foo">foo</a>
+<a href="foo">foo</a>
+<a href="prefetch/qwe" rel=prefetch>prefetch qwe</a>
+<a href="prefetch/xyz" rel=prefetch>prefetch xyz</a>

test/apps/preloading/src/routes/prefetch/[slug]/index.html

@@ -0,0 +1 @@
+<h1>{params.slug}</h1>

test/apps/preloading/src/routes/prefetch/_layout.html

@@ -0,0 +1 @@
+<svelte:component this={child.component} {...child.props}/>

test/apps/preloading/src/routes/prefetch/index.html

@@ -0,0 +1 @@
+<h1>prefetch</h1>

test/apps/preloading/test.ts

@@ -83,4 +83,31 @@ describe('preloading', function() {
 		assert.equal(page.url(), `${base}/foo`);
 		assert.equal(await title(), 'foo');
 	});
-});
+
+	it('navigates to prefetched urls', async () => {
+		await page.goto(base);
+		await start();
+		await prefetchRoutes();
+
+		await page.hover('a[href="prefetch/qwe"]');
+		await wait(100);
+		await page.hover('a[href="prefetch/xyz"]');
+		await wait(100);
+
+		await page.click('a[href="prefetch/qwe"]');
+		await wait(50);
+
+		assert.equal(
+			await title(),
+			'qwe'
+		);
+
+		await page.goto(`${base}/prefetch`);
+		await wait(50);
+
+		assert.equal(
+			await title(),
+			'prefetch'
+		);
+	});
+});

test/apps/with-basepath/test.ts

@@ -56,6 +56,7 @@ describe('with-basepath', function() {
 		assert.deepEqual(non_client_assets, [
 			'custom-basepath/global.css',
 			'custom-basepath/index.html',
+			'custom-basepath/service-worker-index.html',
 			'custom-basepath/service-worker.js'
 		]);
 	});

test/apps/with-sourcemaps-webpack/src/client.js

@@ -0,0 +1,9 @@
+import * as sapper from '../__sapper__/client.js';
+
+window.start = () => sapper.start({
+	target: document.querySelector('#sapper')
+});
+
+window.prefetchRoutes = () => sapper.prefetchRoutes();
+window.prefetch = href => sapper.prefetch(href);
+window.goto = href => sapper.goto(href);

test/apps/with-sourcemaps-webpack/src/routes/_error.html

@@ -0,0 +1,3 @@
+<h1>{status}</h1>
+
+<p>{error.message}</p>

test/apps/with-sourcemaps-webpack/src/routes/index.html

@@ -0,0 +1,3 @@
+<h1>Great success!</h1>
+
+<p>Woot!</p>

test/apps/with-sourcemaps-webpack/src/server.js

@@ -0,0 +1,8 @@
+import polka from 'polka';
+import * as sapper from '../__sapper__/server.js';
+
+const { PORT } = process.env;
+
+polka()
+	.use(sapper.middleware())
+	.listen(PORT);

test/apps/with-sourcemaps-webpack/src/service-worker.js

@@ -0,0 +1,82 @@
+import { timestamp, files, shell, routes } from '../__sapper__/service-worker.js';
+
+const ASSETS = `cache${timestamp}`;
+
+// `shell` is an array of all the files generated by webpack,
+// `files` is an array of everything in the `static` directory
+const to_cache = shell.concat(ASSETS);
+const cached = new Set(to_cache);
+
+self.addEventListener('install', event => {
+	event.waitUntil(
+		caches
+			.open(ASSETS)
+			.then(cache => cache.addAll(to_cache))
+			.then(() => {
+				self.skipWaiting();
+			})
+	);
+});
+
+self.addEventListener('activate', event => {
+	event.waitUntil(
+		caches.keys().then(async keys => {
+			// delete old caches
+			for (const key of keys) {
+				if (key !== ASSETS) await caches.delete(key);
+			}
+
+			self.clients.claim();
+		})
+	);
+});
+
+self.addEventListener('fetch', event => {
+	if (event.request.method !== 'GET') return;
+
+	const url = new URL(event.request.url);
+
+	// don't try to handle e.g. data: URIs
+	if (!url.protocol.startsWith('http')) return;
+
+	// ignore dev server requests
+	if (url.hostname === self.location.hostname && url.port !== self.location.port) return;
+
+	// always serve assets and webpack-generated files from cache
+	if (url.host === self.location.host && cached.has(url.pathname)) {
+		event.respondWith(caches.match(event.request));
+		return;
+	}
+
+	// for pages, you might want to serve a shell `index.html` file,
+	// which Sapper has generated for you. It's not right for every
+	// app, but if it's right for yours then uncomment this section
+	/*
+	if (url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) {
+		event.respondWith(caches.match('/index.html'));
+		return;
+	}
+	*/
+
+	if (event.request.cache === 'only-if-cached') return;
+
+	// for everything else, try the network first, falling back to
+	// cache if the user is offline. (If the pages never change, you
+	// might prefer a cache-first approach to a network-first one.)
+	event.respondWith(
+		caches
+			.open(`offline${timestamp}`)
+			.then(async cache => {
+				try {
+					const response = await fetch(event.request);
+					cache.put(event.request, response.clone());
+					return response;
+				} catch(err) {
+					const response = await cache.match(event.request);
+					if (response) return response;
+
+					throw err;
+				}
+			})
+	);
+});

test/apps/with-sourcemaps-webpack/src/template.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset='utf-8'>
+
+	%sapper.base%
+	%sapper.styles%
+	%sapper.head%
+</head>
+<body>
+	<div id='sapper'>%sapper.html%</div>
+	%sapper.scripts%
+</body>
+</html>

test/apps/with-sourcemaps-webpack/test.ts

@@ -0,0 +1,43 @@
+import * as puppeteer from 'puppeteer';
+import { build } from '../../../api';
+import * as assert from "assert";
+import { AppRunner } from '../AppRunner';
+import * as fs from "fs";
+import * as path from "path";
+
+describe('with-sourcemaps-webpack', function() {
+	this.timeout(10000);
+
+	let runner: AppRunner;
+	let page: puppeteer.Page;
+	let base: string;
+
+	// helpers
+	let start: () => Promise<void>;
+	let prefetchRoutes: () => Promise<void>;
+	let prefetch: (href: string) => Promise<void>;
+	let goto: (href: string) => Promise<void>;
+
+	// hooks
+	before(async () => {
+		await build({ cwd: __dirname, bundler: 'webpack' });
+
+		runner = new AppRunner(__dirname, '__sapper__/build/server/server.js');
+		({ base, page, start, prefetchRoutes, prefetch, goto } = await runner.start());
+	});
+
+	it('does not put sourcemap files in service worker shell', async () => {
+		const serviceWorker = await import(`${__dirname}/__sapper__/service-worker.js`);
+		const shell: string[] = serviceWorker.shell;
+
+		assert.equal(shell.filter(_ => _.endsWith('.map')).length, 0,
+			'sourcemap files are not cached in SW');
+
+		const clientShellDir = path.resolve(`${__dirname}/__sapper__/build`, path.dirname(shell[0]));
+		const sourcemapFiles = fs.readdirSync(clientShellDir).filter(_ => _.endsWith('.map'));
+		assert.ok(sourcemapFiles.length > 0, 'sourcemap files exist');
+	});
+
+	after(() => runner.end());
+
+});

test/apps/with-sourcemaps-webpack/webpack.config.js

@@ -0,0 +1,73 @@
+const webpack = require('webpack');
+const config = require('../../../config/webpack.js');
+
+const mode = process.env.NODE_ENV;
+const dev = mode === 'development';
+
+module.exports = {
+	client: {
+		entry: config.client.entry(),
+		output: config.client.output(),
+		resolve: {
+			extensions: ['.js', '.json', '.html'],
+			mainFields: ['svelte', 'module', 'browser', 'main']
+		},
+		module: {
+			rules: [
+				{
+					test: /\.html$/,
+					use: {
+						loader: 'svelte-loader',
+						options: {
+							dev,
+							hydratable: true,
+							hotReload: true
+						}
+					}
+				}
+			]
+		},
+		mode,
+		plugins: [
+			dev && new webpack.HotModuleReplacementPlugin(),
+			new webpack.DefinePlugin({
+				'process.browser': true,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			}),
+		].filter(Boolean),
+		devtool: dev ? 'inline-source-map' : 'source-map'
+	},
+
+	server: {
+		entry: config.server.entry(),
+		output: config.server.output(),
+		target: 'node',
+		resolve: {
+			extensions: ['.js', '.json', '.html'],
+			mainFields: ['svelte', 'module', 'browser', 'main']
+		},
+		module: {
+			rules: [
+				{
+					test: /\.html$/,
+					use: {
+						loader: 'svelte-loader',
+						options: {
+							css: false,
+							generate: 'ssr',
+							dev
+						}
+					}
+				}
+			]
+		},
+		mode: process.env.NODE_ENV
+	},
+
+	serviceworker: {
+		entry: config.serviceworker.entry(),
+		output: config.serviceworker.output(),
+		mode: process.env.NODE_ENV,
+		devtool: 'sourcemap'
+	}
+};

test/apps/with-sourcemaps/rollup.config.js

@@ -0,0 +1,64 @@
+import resolve from 'rollup-plugin-node-resolve';
+import replace from 'rollup-plugin-replace';
+import svelte from 'rollup-plugin-svelte';
+
+const mode = process.env.NODE_ENV;
+const dev = mode === 'development';
+
+const config = require('../../../config/rollup.js');
+
+export default {
+	client: {
+		input: config.client.input(),
+		output: Object.assign({}, config.client.output(), { sourcemap: true }),
+		plugins: [
+			replace({
+				'process.browser': true,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			}),
+			svelte({
+				dev,
+				hydratable: true,
+				emitCss: true
+			}),
+			resolve()
+		],
+
+		// temporary, pending Rollup 1.0
+		experimentalCodeSplitting: true
+	},
+
+	server: {
+		input: config.server.input(),
+		output: config.server.output(),
+		plugins: [
+			replace({
+				'process.browser': false,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			}),
+			svelte({
+				generate: 'ssr',
+				dev
+			}),
+			resolve({
+				preferBuiltins: true
+			})
+		],
+		external: ['sirv', 'polka'],
+
+		// temporary, pending Rollup 1.0
+		experimentalCodeSplitting: true
+	},
+
+	serviceworker: {
+		input: config.serviceworker.input(),
+		output: config.serviceworker.output(),
+		plugins: [
+			resolve(),
+			replace({
+				'process.browser': true,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			})
+		]
+	}
+};

test/apps/with-sourcemaps/src/client.js

@@ -0,0 +1,9 @@
+import * as sapper from '../__sapper__/client.js';
+
+window.start = () => sapper.start({
+	target: document.querySelector('#sapper')
+});
+
+window.prefetchRoutes = () => sapper.prefetchRoutes();
+window.prefetch = href => sapper.prefetch(href);
+window.goto = href => sapper.goto(href);

test/apps/with-sourcemaps/src/routes/_error.html

@@ -0,0 +1,3 @@
+<h1>{status}</h1>
+
+<p>{error.message}</p>

test/apps/with-sourcemaps/src/routes/index.html

@@ -0,0 +1,3 @@
+<h1>Great success!</h1>
+
+<p>Woot!</p>

test/apps/with-sourcemaps/src/server.js

@@ -0,0 +1,8 @@
+import polka from 'polka';
+import * as sapper from '../__sapper__/server.js';
+
+const { PORT } = process.env;
+
+polka()
+	.use(sapper.middleware())
+	.listen(PORT);

test/apps/with-sourcemaps/src/service-worker.js

@@ -0,0 +1,82 @@
+import { timestamp, files, shell, routes } from '../__sapper__/service-worker.js';
+
+const ASSETS = `cache${timestamp}`;
+
+// `shell` is an array of all the files generated by webpack,
+// `files` is an array of everything in the `static` directory
+const to_cache = shell.concat(ASSETS);
+const cached = new Set(to_cache);
+
+self.addEventListener('install', event => {
+	event.waitUntil(
+		caches
+			.open(ASSETS)
+			.then(cache => cache.addAll(to_cache))
+			.then(() => {
+				self.skipWaiting();
+			})
+	);
+});
+
+self.addEventListener('activate', event => {
+	event.waitUntil(
+		caches.keys().then(async keys => {
+			// delete old caches
+			for (const key of keys) {
+				if (key !== ASSETS) await caches.delete(key);
+			}
+
+			self.clients.claim();
+		})
+	);
+});
+
+self.addEventListener('fetch', event => {
+	if (event.request.method !== 'GET') return;
+
+	const url = new URL(event.request.url);
+
+	// don't try to handle e.g. data: URIs
+	if (!url.protocol.startsWith('http')) return;
+
+	// ignore dev server requests
+	if (url.hostname === self.location.hostname && url.port !== self.location.port) return;
+
+	// always serve assets and webpack-generated files from cache
+	if (url.host === self.location.host && cached.has(url.pathname)) {
+		event.respondWith(caches.match(event.request));
+		return;
+	}
+
+	// for pages, you might want to serve a shell `index.html` file,
+	// which Sapper has generated for you. It's not right for every
+	// app, but if it's right for yours then uncomment this section
+	/*
+	if (url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) {
+		event.respondWith(caches.match('/index.html'));
+		return;
+	}
+	*/
+
+	if (event.request.cache === 'only-if-cached') return;
+
+	// for everything else, try the network first, falling back to
+	// cache if the user is offline. (If the pages never change, you
+	// might prefer a cache-first approach to a network-first one.)
+	event.respondWith(
+		caches
+			.open(`offline${timestamp}`)
+			.then(async cache => {
+				try {
+					const response = await fetch(event.request);
+					cache.put(event.request, response.clone());
+					return response;
+				} catch(err) {
+					const response = await cache.match(event.request);
+					if (response) return response;
+
+					throw err;
+				}
+			})
+	);
+});

test/apps/with-sourcemaps/src/template.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset='utf-8'>
+
+	%sapper.base%
+	%sapper.styles%
+	%sapper.head%
+</head>
+<body>
+	<div id='sapper'>%sapper.html%</div>
+	%sapper.scripts%
+</body>
+</html>

test/apps/with-sourcemaps/test.ts

@@ -0,0 +1,43 @@
+import * as puppeteer from 'puppeteer';
+import { build } from '../../../api';
+import * as assert from "assert";
+import { AppRunner } from '../AppRunner';
+import * as fs from 'fs';
+import * as path from "path";
+
+describe('with-sourcemaps', function() {
+	this.timeout(10000);
+
+	let runner: AppRunner;
+	let page: puppeteer.Page;
+	let base: string;
+
+	// helpers
+	let start: () => Promise<void>;
+	let prefetchRoutes: () => Promise<void>;
+	let prefetch: (href: string) => Promise<void>;
+	let goto: (href: string) => Promise<void>;
+
+	// hooks
+	before(async () => {
+		await build({ cwd: __dirname });
+
+		runner = new AppRunner(__dirname, '__sapper__/build/server/server.js');
+		({ base, page, start, prefetchRoutes, prefetch, goto } = await runner.start());
+	});
+
+	it('does not put sourcemap files in service worker shell', async () => {
+		const serviceWorker = await import(`${__dirname}/__sapper__/service-worker.js`);
+		const shell: string[] = serviceWorker.shell;
+
+		assert.equal(shell.filter(_ => _.endsWith('.map')).length, 0,
+			'sourcemap files are not cached in SW');
+
+		const clientShellDir = path.resolve(`${__dirname}/__sapper__/build`, path.dirname(shell[0]));
+		const sourcemapFiles = fs.readdirSync(clientShellDir).filter(_ => _.endsWith('.map'));
+		assert.ok(sourcemapFiles.length > 0, 'sourcemap files exist');
+	});
+
+	after(() => runner.end());
+
+});