-> v0.26.0-alpha.3

Ensure deepest layout is always refreshed on goto

.gitignore

@@ -4,10 +4,13 @@ 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
+/runtime/app.mjs
+/runtime/server.mjs

.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 +1,337 @@
 # sapper changelog
 
+## 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))
+
+## 0.24.1
+
+* Include CSS chunks in webpack build info to avoid duplication ([#529](https://github.com/sveltejs/sapper/pull/529))
+* Fix preload `as` for styles ([#530](https://github.com/sveltejs/sapper/pull/530))
+
+## 0.24.0
+
+* Handle external URLs in `this.redirect` ([#490](https://github.com/sveltejs/sapper/issues/490))
+* Strip leading `/` from basepath ([#495](https://github.com/sveltejs/sapper/issues/495))
+* Treat duplicate query string parameters as arrays ([#497](https://github.com/sveltejs/sapper/issues/497))
+* Don't buffer `stdout` and `stderr` ([#305](https://github.com/sveltejs/sapper/issues/305))
+* Posixify `build_dir` ([#498](https://github.com/sveltejs/sapper/pull/498))
+* Use `page[XY]Offset` instead of `scroll[XY]` ([#480](https://github.com/sveltejs/sapper/issues/480))
+
+## 0.23.5
+
+* Include lazily-imported CSS in main CSS chunk ([#492](https://github.com/sveltejs/sapper/pull/492))
+* Make search param decoding spec-compliant ([#493](https://github.com/sveltejs/sapper/pull/493))
+* Handle async route errors ([#488](https://github.com/sveltejs/sapper/pull/488))
+
+## 0.23.4
+
+* Ignore empty anchors when exporting ([#491](https://github.com/sveltejs/sapper/pull/491))
+
+## 0.23.3
+
+* Clear `error` and `status` on successful render ([#477](https://github.com/sveltejs/sapper/pull/477))
+
+## 0.23.2
+
+* Fix entry point CSS ([#471](https://github.com/sveltejs/sapper/pull/471))
+
+## 0.23.1
+
+* Scroll to deeplink that matches current URL ([#472](https://github.com/sveltejs/sapper/pull/472))
+* Scroll to deeplink on another page ([#341](https://github.com/sveltejs/sapper/issues/341))
+
+## 0.23.0
+
+* Overhaul internal APIs ([#468](https://github.com/sveltejs/sapper/pull/468))
+* Remove unused `sapper start` and `sapper upgrade` ([#468](https://github.com/sveltejs/sapper/pull/468))
+* Remove magic environment variables ([#469](https://github.com/sveltejs/sapper/pull/469))
+* Preserve SSI comments ([#470](https://github.com/sveltejs/sapper/pull/470))
+
+## 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))
+
+## 0.14.1
+
+* Route parameters can be qualified with regex characters ([#283](https://github.com/sveltejs/sapper/pull/283))
+
+## 0.14.0
+
+* `4xx.html` and `5xx.html` are replaced with `_error.html` ([#209](https://github.com/sveltejs/sapper/issues/209))
+* Treat `foo/index.json.js` and `foo.json.js` as equivalents ([#297](https://github.com/sveltejs/sapper/issues/297))
+* Return a promise from `goto` ([#270](https://github.com/sveltejs/sapper/issues/270))
+* Use store when rendering error pages ([#293](https://github.com/sveltejs/sapper/issues/293))
+* Prevent console errors when visiting an error page ([#279](https://github.com/sveltejs/sapper/issues/279))
+
+## 0.13.6
+
+* Fix `baseUrl` synthesis ([#296](https://github.com/sveltejs/sapper/issues/296))
+
+## 0.13.5
+
+* Fix handling of fatal errors ([#289](https://github.com/sveltejs/sapper/issues/289))
+
+## 0.13.4
+
+* Focus `<body>` after navigation ([#287](https://github.com/sveltejs/sapper/issues/287))
+* Fix timing of hot reload updates
+* Emit `fatal` event if server crashes ([#285](https://github.com/sveltejs/sapper/pull/285))
+* Emit `stdout` and `stderr` events on dev watcher ([#285](https://github.com/sveltejs/sapper/pull/285))
+* Always refresh client assets in dev ([#286](https://github.com/sveltejs/sapper/pull/286))
+* Correctly initialise rebuild stats
+
+## 0.13.3
+
+* Make `fatal` events clonable for IPC purposes
+
+## 0.13.2
+
+* Emit a `basepath` event ([#284](https://github.com/sveltejs/sapper/pull/284))
+
+## 0.13.1
+
+* Reinstate ten-second interval between dev server heartbeats ([#276](https://github.com/sveltejs/sapper/issues/276))
+
+## 0.13.0
+
+* Expose `dev`, `build`, `export` and `find_page` APIs ([#272](https://github.com/sveltejs/sapper/issues/272))
+
+## 0.12.0
+
+* Each app has a single `<App>` component. See the [migration guide](https://sapper.svelte.technology/guide#0-11-to-0-12) for more information ([#157](https://github.com/sveltejs/sapper/issues/157))
+* Process exits with error code 1 if build/export fails ([#208](https://github.com/sveltejs/sapper/issues/208))
+
+## 0.11.1
+
+* Limit routes with leading dots to `.well-known` URIs ([#252](https://github.com/sveltejs/sapper/issues/252))
+* Allow server routes to sit in front of pages ([#236](https://github.com/sveltejs/sapper/pull/236))
+
+## 0.11.0
+
+* Create launcher file ([#240](https://github.com/sveltejs/sapper/issues/240))
+* Only keep necessary parts of webpack stats ([#251](https://github.com/sveltejs/sapper/pull/251))
+* Allow `NODE_ENV` to be overridden when building ([#241](https://github.com/sveltejs/sapper/issues/241))
+
+## 0.10.7
+
+* Allow routes to have a leading `.` ([#243](https://github.com/sveltejs/sapper/pull/243))
+* Only encode necessary characters in routes ([#234](https://github.com/sveltejs/sapper/pull/234))
+* Preserve existing `process.env` when exporting ([#245](https://github.com/sveltejs/sapper/pull/245))
+
+## 0.10.6
+
+* Fix error reporting in `sapper start`
+
+## 0.10.5
+
+* Fix missing service worker ([#231](https://github.com/sveltejs/sapper/pull/231))
+
 ## 0.10.4
 
 * Upgrade chokidar, this time with a fix ([#227](https://github.com/sveltejs/sapper/pull/227))

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

@@ -0,0 +1 @@
+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');

cypress.json

@@ -1,9 +0,0 @@
-{
-	"baseUrl": "http://localhost:3000",
-	"videoRecording": false,
-	"fixturesFolder": "test/cypress/fixtures",
-	"integrationFolder": "test/cypress/integration",
-	"pluginsFile": false,
-	"screenshotsFolder": "test/cypress/screenshots",
-	"supportFile": "test/cypress/support/index.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 +1,4 @@
 --require source-map-support/register
+--require sucrase/register
 --recursive
-test/unit/**/*.js
-test/common/test.js
+test/apps/*/test.ts

package.json

@@ -1,79 +1,85 @@
 {
   "name": "sapper",
-  "version": "0.10.4",
+  "version": "0.26.0-alpha.3",
   "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",
+    "runtime/*.mjs",
+    "runtime/internal"
   ],
   "directories": {
     "test": "test"
   },
   "dependencies": {
-    "cheerio": "^1.0.0-rc.2",
-    "chokidar": "^2.0.3",
-    "clorox": "^1.0.3",
-    "cookie": "^0.3.1",
-    "devalue": "^1.0.1",
-    "glob": "^7.1.2",
-    "html-minifier": "^3.5.11",
-    "mkdirp": "^0.5.1",
-    "node-fetch": "^2.1.1",
-    "port-authority": "^1.0.2",
-    "pretty-bytes": "^4.0.2",
-    "pretty-ms": "^3.1.0",
-    "require-relative": "^0.8.7",
-    "rimraf": "^2.6.2",
-    "sade": "^1.4.0",
-    "sander": "^0.6.0",
-    "source-map-support": "^0.5.4",
-    "tslib": "^1.9.0",
-    "url-parse": "^1.2.0",
-    "webpack-format-messages": "^1.0.2"
+    "html-minifier": "^3.5.21",
+    "shimport": "0.0.14",
+    "source-map-support": "^0.5.10",
+    "sourcemap-codec": "^1.4.4",
+    "string-hash": "^1.1.3",
+    "tslib": "^1.9.3"
   },
   "devDependencies": {
-    "@std/esm": "^0.25.3",
-    "@types/glob": "^5.0.34",
     "@types/mkdirp": "^0.5.2",
+    "@types/mocha": "^5.2.5",
+    "@types/node": "^10.12.21",
+    "@types/puppeteer": "^1.11.3",
     "@types/rimraf": "^2.0.2",
-    "compression": "^1.7.1",
-    "eslint": "^4.13.1",
-    "eslint-plugin-import": "^2.8.0",
-    "express": "^4.16.3",
-    "get-port": "^3.2.0",
-    "mocha": "^5.0.4",
-    "nightmare": "^3.0.0",
-    "npm-run-all": "^4.1.2",
-    "polka": "^0.3.4",
-    "rollup": "^0.57.0",
-    "rollup-plugin-commonjs": "^9.1.0",
-    "rollup-plugin-json": "^2.3.0",
+    "agadoo": "^1.0.1",
+    "cheap-watch": "^1.0.2",
+    "cookie": "^0.3.1",
+    "devalue": "^1.1.0",
+    "eslint": "^5.12.1",
+    "eslint-plugin-import": "^2.16.0",
+    "kleur": "^3.0.1",
+    "mkdirp": "^0.5.1",
+    "mocha": "^5.2.0",
+    "node-fetch": "^2.3.0",
+    "npm-run-all": "^4.1.5",
+    "polka": "^0.5.1",
+    "port-authority": "^1.0.5",
+    "pretty-bytes": "^5.1.0",
+    "puppeteer": "^1.12.0",
+    "require-relative": "^0.8.7",
+    "rimraf": "^2.6.3",
+    "rollup": "^1.1.2",
+    "rollup-plugin-commonjs": "^9.2.0",
+    "rollup-plugin-json": "^3.1.0",
+    "rollup-plugin-node-resolve": "^4.0.0",
+    "rollup-plugin-replace": "^2.1.0",
     "rollup-plugin-string": "^2.0.2",
-    "rollup-plugin-typescript": "^0.8.1",
-    "serve-static": "^1.13.2",
-    "svelte": "^1.57.4",
-    "svelte-loader": "^2.5.1",
-    "ts-node": "^5.0.1",
-    "typescript": "^2.6.2",
-    "walk-sync": "^0.3.2",
-    "webpack": "^4.1.0"
+    "rollup-plugin-sucrase": "^2.1.0",
+    "rollup-plugin-svelte": "^5.0.1",
+    "rollup-plugin-typescript": "^1.0.0",
+    "sade": "^1.4.2",
+    "sander": "^0.6.0",
+    "sirv": "^0.2.2",
+    "sucrase": "^3.9.5",
+    "svelte": "^3.0.0-alpha27",
+    "svelte-loader": "^2.12.0",
+    "ts-node": "^8.0.2",
+    "typescript": "^3.3.1",
+    "webpack": "^4.29.0",
+    "webpack-format-messages": "^2.0.5",
+    "yootils": "0.0.14"
+  },
+  "peerDependencies": {
+    "svelte": "^3.0.0"
   },
   "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"
+    "update_mime_types": "curl http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types | grep -e \"^[^#]\" > runtime/src/server/middleware/mime-types.md"
   },
   "repository": "https://github.com/sveltejs/sapper",
   "keywords": [

rollup.config.js

@@ -1,8 +1,10 @@
-import typescript from 'rollup-plugin-typescript';
+import sucrase from 'rollup-plugin-sucrase';
 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),
@@ -10,22 +12,42 @@ const external = [].concat(
 	'sapper/core.js'
 );
 
-export default [
-	{
-		input: `src/runtime/index.ts`,
+function template(kind, external) {
+	return {
+		input: `runtime/src/${kind}/index.ts`,
 		output: {
-			file: `runtime.js`,
-			format: 'es'
+			file: `runtime/${kind}.mjs`,
+			format: 'es',
+			paths: id => id.replace('@sapper', '.')
 		},
+		external,
 		plugins: [
-			typescript({
-				typescript: require('typescript')
+			resolve({
+				extensions: ['.mjs', '.js', '.ts']
+			}),
+			commonjs(),
+			string({
+				include: '**/*.md'
+			}),
+			sucrase({
+				transforms: ['typescript']
 			})
 		]
-	},
+	};
+}
+
+export default [
+	template('app', id => /^(svelte\/?|@sapper\/)/.test(id)),
+	template('server', id => builtinModules.includes(id)),
 
 	{
-		input: [`src/cli.ts`, `src/core.ts`, `src/middleware.ts`, `src/webpack.ts`],
+		input: [
+			`src/api.ts`,
+			`src/cli.ts`,
+			`src/core.ts`,
+			`src/config/rollup.ts`,
+			`src/config/webpack.ts`
+		],
 		output: {
 			dir: 'dist',
 			format: 'cjs',
@@ -33,16 +55,14 @@ export default [
 		},
 		external,
 		plugins: [
-			string({
-				include: '**/*.md'
-			}),
 			json(),
+			resolve({
+				extensions: ['.mjs', '.js', '.ts']
+			}),
 			commonjs(),
-			typescript({
-				typescript: require('typescript')
+			sucrase({
+				transforms: ['typescript']
 			})
-		],
-		experimentalCodeSplitting: true,
-		experimentalDynamicImport: 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';

runtime/internal/Sapper.html

@@ -0,0 +1,12 @@
+<script>
+	import { setContext } from 'svelte';
+	import { CONTEXT_KEY } from './shared';
+
+	export let Root;
+	export let props;
+	export let session;
+
+	setContext(CONTEXT_KEY, session);
+</script>
+
+<Root {...props}/>

runtime/internal/layout.html

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

runtime/internal/shared.mjs

@@ -0,0 +1,10 @@
+import { writable } from 'svelte/store';
+
+export const stores = {
+	preloading: writable(false),
+	page: writable(null)
+};
+
+export const CONTEXT_KEY = {};
+
+export const preload = () => ({});

runtime/src/app/app.ts

@@ -0,0 +1,341 @@
+import { writable } from 'svelte/store.mjs';
+import Sapper from '@sapper/internal/Sapper.html';
+import { stores } from '@sapper/internal/shared';
+import { Root, root_preload, ErrorComponent, ignore, components, routes } from '@sapper/internal/manifest-client';
+import {
+	Target,
+	ScrollPosition,
+	Component,
+	Redirect,
+	ComponentLoader,
+	ComponentConstructor,
+	Route,
+	Page
+} from './types';
+import goto from './goto';
+
+declare const __SAPPER__;
+export const initial_data = typeof __SAPPER__ !== 'undefined' && __SAPPER__;
+
+let ready = false;
+let root_component: Component;
+let current_token: {};
+let root_preloaded: Promise<any>;
+let current_branch = [];
+
+const session = writable(initial_data && initial_data.session);
+
+let $session;
+let session_dirty: boolean;
+
+session.subscribe(async value => {
+	$session = value;
+
+	if (!ready) return;
+	session_dirty = true;
+
+	const target = select_target(new URL(location.href));
+
+	const token = current_token = {};
+	const { redirect, props, branch } = await hydrate_target(target);
+	if (token !== current_token) return; // a secondary navigation happened while we were loading
+
+	await render(redirect, branch, props, target.page);
+});
+
+export let prefetching: {
+	href: string;
+	promise: Promise<{ redirect?: Redirect, data?: any }>;
+} = 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;
+}
+
+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_target(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 page routes
+	if (ignore.some(pattern => pattern.test(path))) return;
+
+	for (let i = 0; i < routes.length; i += 1) {
+		const route = routes[i];
+
+		const match = route.pattern.exec(path);
+		if (match) {
+			const query: Record<string, string | string[]> = Object.create(null);
+			if (url.search.length > 0) {
+				url.search.slice(1).split('&').forEach(searchParam => {
+					let [, key, value] = /([^=]*)(?:=(.*))?/.exec(decodeURIComponent(searchParam));
+					value = (value || '').replace(/\+/g, ' ');
+					if (typeof query[key] === 'string') query[key] = [<string>query[key]];
+					if (typeof query[key] === 'object') (query[key] as string[]).push(value);
+					else query[key] = value;
+				});
+			}
+
+			const part = route.parts[route.parts.length - 1];
+			const params = part.params ? part.params(match) : {};
+
+			const page = { path, query, params };
+
+			return { href: url.href, route, match, page };
+		}
+	}
+}
+
+export function scroll_state() {
+	return {
+		x: pageXOffset,
+		y: pageYOffset
+	};
+}
+
+export async function navigate(target: Target, id: number, noscroll?: boolean, hash?: string): 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) stores.preloading.set(true);
+
+	const loaded = prefetching && prefetching.href === target.href ?
+		prefetching.promise :
+		hydrate_target(target);
+
+	prefetching = null;
+
+	const token = current_token = {};
+	const { redirect, props, branch } = await loaded;
+	if (token !== current_token) return; // a secondary navigation happened while we were loading
+
+	await render(redirect, branch, props, target.page);
+	if (document.activeElement) document.activeElement.blur();
+
+	if (!noscroll) {
+		let scroll = scroll_history[id];
+
+		if (hash) {
+			// scroll is an element id (from a hash), we need to compute y.
+			const deep_linked = document.querySelector(hash);
+
+			if (deep_linked) {
+				scroll = {
+					x: 0,
+					y: deep_linked.getBoundingClientRect().top
+				};
+			}
+		}
+
+		scroll_history[cid] = scroll;
+		if (scroll) scrollTo(scroll.x, scroll.y);
+	}
+}
+
+async function render(redirect: Redirect, branch: any[], props: any, page: Page) {
+	if (redirect) return goto(redirect.location, { replaceState: true });
+
+	stores.page.set(page);
+	stores.preloading.set(false);
+
+	if (root_component) {
+		root_component.props = props;
+	} 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);
+		}
+
+		root_component = new Sapper({
+			target,
+			props: {
+				Root,
+				props,
+				session
+			},
+			hydrate: true
+		});
+	}
+
+	current_branch = branch;
+	ready = true;
+	session_dirty = false;
+}
+
+export async function hydrate_target(target: Target): Promise<{
+	redirect?: Redirect;
+	props?: any;
+	branch?: Array<{ Component: ComponentConstructor, preload: (page) => Promise<any>, segment: string }>
+}> {
+	const { route, page } = target;
+	const segments = page.path.split('/').filter(Boolean);
+
+	let redirect: Redirect = null;
+	let error: { statusCode: number, message: Error | string } = null;
+
+	const preload_context = {
+		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_preloaded) {
+		root_preloaded = initial_data.preloaded[0] || root_preload.call(preload_context, {
+			path: page.path,
+			query: page.query,
+			params: {}
+		}, $session);
+	}
+
+	let branch;
+
+	try {
+		branch = await Promise.all(route.parts.map(async (part, i) => {
+			if (!part) return null;
+
+			const segment = segments[i];
+			if (!session_dirty && current_branch[i] && current_branch[i].segment === segment) return current_branch[i];
+
+			const { default: Component, preload } = await load_component(components[part.i]);
+
+			let preloaded;
+			if (ready || !initial_data.preloaded[i + 1]) {
+				preloaded = preload
+					? await preload.call(preload_context, {
+						path: page.path,
+						query: page.query,
+						params: part.params ? part.params(target.match) : {}
+					}, $session)
+					: {};
+			} else {
+				preloaded = initial_data.preloaded[i + 1];
+			}
+
+			return { Component, preloaded, segment };
+		}));
+	} catch (e) {
+		error = { statusCode: 500, message: e };
+		branch = [];
+	}
+
+	if (redirect) return { redirect };
+
+	if (error) {
+		// TODO be nice if this was less of a special case
+		return {
+			props: {
+				child: {
+					component: ErrorComponent,
+					props: {
+						error: typeof error.message === 'string' ? new Error(error.message) : error.message,
+						status: error.statusCode
+					}
+				}
+			},
+			branch
+		};
+	}
+
+	const props = Object.assign({}, await root_preloaded, {
+		child: { segment: segments[0] }
+	});
+
+	let level = props.child;
+
+	branch.forEach((node, i) => {
+		if (!node) return;
+
+		level.component = node.Component;
+		level.props = Object.assign({}, node.preloaded, {
+			child: { segment: segments[i + 1] }
+		});
+
+		level = level.props.child;
+	});
+
+	return { props, branch };
+}
+
+function load_css(chunk: string) {
+	const href = `client/${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<{
+	default: ComponentConstructor,
+	preload?: (input: any) => any
+}> {
+	// 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]);
+}
+
+function detach(node: Node) {
+	node.parentNode.removeChild(node);
+}

runtime/src/app/goto/index.ts

@@ -0,0 +1,13 @@
+import { history, select_target, navigate, cid } from '../app';
+
+export default function goto(href: string, opts = { replaceState: false }) {
+	const target = select_target(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
+}

runtime/src/app/index.ts

@@ -0,0 +1,12 @@
+import { getContext } from 'svelte';
+import { CONTEXT_KEY, stores } from '@sapper/internal/shared';
+
+export const preloading = { subscribe: stores.preloading.subscribe };
+export const page = { subscribe: stores.page.subscribe };
+
+export const getSession = () => getContext(CONTEXT_KEY);
+
+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';

runtime/src/app/prefetch/index.ts

@@ -0,0 +1,14 @@
+import { select_target, prefetching, set_prefetching, hydrate_target } from '../app';
+import { Target } from '../types';
+
+export default function prefetch(href: string) {
+	const target: Target = select_target(new URL(href, document.baseURI));
+
+	if (target) {
+		if (!prefetching || href !== prefetching.href) {
+			set_prefetching(href, hydrate_target(target));
+		}
+
+		return prefetching.promise;
+	}
+}

runtime/src/app/prefetchRoutes/index.ts

@@ -0,0 +1,13 @@
+import { components, routes } from '@sapper/internal/manifest-client';
+import { load_component } from '../app';
+
+export default function prefetchRoutes(pathnames: string[]) {
+	return routes
+		.filter(pathnames
+			? route => pathnames.some(pathname => route.pattern.test(pathname))
+			: () => true
+		)
+		.reduce((promise: Promise<any>, route) => promise.then(() => {
+			return Promise.all(route.parts.map(part => part && load_component(components[part.i])));
+		}), Promise.resolve());
+}

runtime/src/app/start/index.ts

@@ -0,0 +1,130 @@
+import {
+	cid,
+	history,
+	initial_data,
+	navigate,
+	scroll_history,
+	scroll_state,
+	select_target,
+	set_target,
+	uid,
+	set_uid,
+	set_cid
+} from '../app';
+import prefetch from '../prefetch/index';
+
+export default function start(opts: {
+	target: Node
+}) {
+	if ('scrollRestoration' in history) {
+		history.scrollRestoration = 'manual';
+	}
+
+	set_target(opts.target);
+
+	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;
+
+		history.replaceState({ id: uid }, '', href);
+
+		if (!initial_data.error) {
+			const target = select_target(new URL(location.href));
+			if (target) return navigate(target, uid, false, hash);
+		}
+	});
+}
+
+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) {
+		if (!location.hash) 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_target(url);
+	if (target) {
+		const noscroll = a.hasAttribute('sapper-noscroll');
+		navigate(target, null, noscroll, url.hash);
+		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_target(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);
+	}
+}

runtime/src/app/types.ts

@@ -0,0 +1,62 @@
+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 interface ComponentConstructor {
+	new (options: { target: Node, props: any, 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 Route = {
+	pattern: RegExp;
+	parts: Array<{
+		i: number;
+		params?: (match: RegExpExecArray) => Record<string, string>;
+	}>;
+};
+
+export type Manifest = {
+	ignore: RegExp[];
+	root: ComponentConstructor;
+	error: () => Promise<{ default: ComponentConstructor }>;
+	pages: Route[]
+};
+
+export type ScrollPosition = {
+	x: number;
+	y: number;
+};
+
+export type Target = {
+	href: string;
+	route: Route;
+	match: RegExpExecArray;
+	page: Page;
+};
+
+export type Redirect = {
+	statusCode: number;
+	location: string;
+};
+
+export type Page = {
+	path: string;
+	params: Record<string, string>;
+	query: Record<string, string | string[]>;
+};

runtime/src/server/constants.js

@@ -0,0 +1 @@
+export const IGNORE = '__SAPPER__IGNORE__';

runtime/src/server/index.ts

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

runtime/src/server/middleware/get_page_handler.ts

@@ -0,0 +1,365 @@
+import { writable } from 'svelte/store.mjs';
+import fs from 'fs';
+import path from 'path';
+import cookie from 'cookie';
+import devalue from 'devalue';
+import fetch from 'node-fetch';
+import URL from 'url';
+import { IGNORE } from '../constants';
+import { Manifest, Page, Props, Req, Res } from './types';
+import { build_dir, dev, src_dir } from '@sapper/internal/manifest-server';
+import { stores } from '@sapper/internal/shared';
+import Sapper from '@sapper/internal/Sapper.html';
+
+export function get_page_handler(
+	manifest: Manifest,
+	session_getter: (req: Req, res: Res) => any
+) {
+	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'));
+	}
+
+	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,
+			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 && !isSWIndexHtml) {
+			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]);
+			});
+		}
+
+		if (build_info.bundler === 'rollup') {
+			// TODO add dependencies and CSS
+			const link = preloaded_chunks
+				.filter(file => file && !file.match(/\.map$/))
+				.map(file => `<${req.baseUrl}/client/${file}>;rel="modulepreload"`)
+				.join(', ');
+
+			res.setHeader('Link', link);
+		} else {
+			const link = preloaded_chunks
+				.filter(file => file && !file.match(/\.map$/))
+				.map((file) => {
+					const as = /\.css$/.test(file) ? 'style' : 'script';
+					return `<${req.baseUrl}/client/${file}>;rel="preload";as="${as}"`;
+				})
+				.join(', ');
+
+			res.setHeader('Link', link);
+		}
+
+		const session = session_getter(req, res);
+
+		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(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:${process.env.PORT}`
+					);
+
+					if (include_cookies) {
+						opts.headers = Object.assign({}, opts.headers);
+
+						const cookies = Object.assign(
+							{},
+							cookie.parse(req.headers.cookie || ''),
+							cookie.parse(opts.headers.cookie || '')
+						);
+
+						const set_cookie = res.getHeader('Set-Cookie');
+						(Array.isArray(set_cookie) ? set_cookie : [set_cookie]).forEach(str => {
+							const match = /([^=]+)=([^;]+)/.exec(<string>str);
+							if (match) cookies[match[1]] = match[2];
+						});
+
+						const str = Object.keys(cookies)
+							.map(key => `${key}=${cookies[key]}`)
+							.join('; ');
+
+						opts.headers.cookie = str;
+					}
+				}
+
+				return fetch(parsed.href, opts);
+			}
+		};
+
+		let preloaded;
+		let match;
+		let params;
+
+		try {
+			const root_preloaded = manifest.root_preload
+				? manifest.root_preload.call(preload_context, {
+					path: req.path,
+					query: req.query,
+					params: {}
+				})
+				: {};
+
+			match = error ? null : page.pattern.exec(req.path);
+
+
+			let toPreload = [root_preloaded];
+			if (!isSWIndexHtml) {
+				toPreload = toPreload.concat(page.parts.map(part => {
+					if (!part) return null;
+
+					// the deepest level is used below, to initialise the store
+					params = part.params ? part.params(match) : {};
+
+					return part.preload
+						? part.preload.call(preload_context, {
+							path: req.path,
+							query: req.query,
+							params
+						}, session)
+						: {};
+				}))
+			}
+
+			preloaded = await Promise.all(toPreload);
+		} catch (err) {
+			preload_error = { statusCode: 500, message: err };
+			preloaded = []; // appease TypeScript
+		}
+
+		try {
+			if (redirect) {
+				const location = URL.resolve(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 segments = req.path.split('/').filter(Boolean);
+
+			const props = Object.assign({}, preloaded[0], {
+				child: {
+					segment: segments[0],
+					props: {}
+				}
+			});
+
+			let level = props.child;
+			if (!isSWIndexHtml) {
+				for (let i = 0; i < page.parts.length; i += 1) {
+					const part = page.parts[i];
+					if (!part) continue;
+
+					Object.assign(level, {
+						component: part.component,
+						props: Object.assign({}, preloaded[i + 1])
+					});
+
+					level.props.child = <Props["child"]>{
+						segment: segments[i + 1],
+						props: {}
+					};
+					level = level.props.child;
+				}
+			}
+
+			if (error) {
+				props.child.props.error = error instanceof Error ? error : { message: error };
+				props.child.props.status = status;
+			}
+
+			stores.page.set({
+				path: req.path,
+				query: req.query,
+				params: params
+			});
+
+			const { html, head, css } = Sapper.render({
+				Root: manifest.root,
+				props: props,
+				session: writable(session)
+			});
+
+			const serialized = {
+				preloaded: `[${preloaded.map(data => try_serialize(data)).join(',')}]`,
+				session: session && try_serialize(session, err => {
+					throw new Error(`Failed to serialize session data: ${err.message}`);
+				})
+			};
+
+			let script = `__SAPPER__={${[
+				error && `error:1`,
+				`baseUrl:"${req.baseUrl}"`,
+				serialized.preloaded && `preloaded:${serialized.preloaded}`,
+				serialized.session && `session:${serialized.session}`
+			].filter(Boolean).join(',')}};`;
+
+			if (has_service_worker) {
+				script += `if('serviceWorker' in navigator)navigator.serviceWorker.register('${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>${head}<noscript id='sapper-head-end'></noscript>`)
+				.replace('%sapper.styles%', () => styles);
+
+			res.statusCode = status;
+			res.end(body);
+		} catch(err) {
+			console.log(err);
+			if (error) {
+				// we encountered an error while rendering the error page — oops
+				res.statusCode = 500;
+				res.end(`<pre>${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 (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)) {
+					handle_page(page, req, res);
+					return;
+				}
+			}
+		}
+
+		handle_error(req, res, 404, 'Not found');
+	};
+}
+
+function read_template(dir = build_dir) {
+	return fs.readFileSync(`${dir}/template.html`, 'utf-8');
+}
+
+function try_serialize(data: any, fail?: (err) => void) {
+	try {
+		return devalue(data);
+	} catch (err) {
+		if (fail) fail(err);
+		return null;
+	}
+}
+
+function escape_html(html: string) {
+	const chars: Record<string, string> = {
+		'"' : 'quot',
+		"'": '#39',
+		'&': 'amp',
+		'<' : 'lt',
+		'>' : 'gt'
+	};
+
+	return html.replace(/["'&<>]/g, c => `&${chars[c]};`);
+}

runtime/src/server/middleware/get_server_route_handler.ts

@@ -0,0 +1,78 @@
+import { IGNORE } from '../constants';
+import { Req, Res, ServerRoute } from './types';
+
+export function get_server_route_handler(routes: ServerRoute[]) {
+	async 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 {
+				await 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();
+	};
+}

runtime/src/server/middleware/index.ts

@@ -0,0 +1,146 @@
+import fs from 'fs';
+import path from 'path';
+import { build_dir, dev, manifest } from '@sapper/internal/manifest-server';
+import { Handler, Req, Res } from './types';
+import { get_server_route_handler } from './get_server_route_handler';
+import { get_page_handler } from './get_page_handler';
+import { lookup } from './mime';
+import { IGNORE } from '../constants';
+
+export default function middleware(opts: {
+	session?: (req: Req, res: Res) => any,
+	ignore?: any
+} = {}) {
+	const { session, 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, session || noop)
+	].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();
+		}
+	};
+}
+
+function noop(){}

runtime/src/server/middleware/types.ts

@@ -0,0 +1,63 @@
+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>;
+		preload?: (data: any) => any | Promise<any>;
+	}>
+};
+
+export type Manifest = {
+	server_routes: ServerRoute[];
+	pages: Page[];
+	root: Component;
+	root_preload?: (data: any) => any | Promise<any>;
+	error: Component;
+}
+
+export type Handler = (req: Req, res: Res, next: () => void) => void;
+
+export type Props = {
+	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) => {
+		head: string;
+		css: { code: string, map: any };
+		html: string
+	}
+}

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.ts

@@ -0,0 +1,4 @@
+export { dev } from './api/dev';
+export { build } from './api/build';
+export { export } from './api/export';
+export { find_page } from './api/find_page';

src/api/build.ts

@@ -0,0 +1,142 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import mkdirp from 'mkdirp';
+import rimraf from 'rimraf';
+import minify_html from './utils/minify_html';
+import { create_compilers, create_main_manifests, create_manifest_data, create_serviceworker_manifest } from '../core';
+import { copy_shimport } from './utils/copy_shimport';
+import read_template from '../core/read_template';
+import { CompileResult } from '../core/create_compilers/interfaces';
+import { noop } from './utils/noop';
+import validate_bundler from './utils/validate_bundler';
+import { copy_runtime } from './utils/copy_runtime';
+
+type Opts = {
+	cwd?: string;
+	src?: string;
+	routes?: string;
+	dest?: string;
+	output?: string;
+	static?: string;
+	legacy?: boolean;
+	bundler?: 'rollup' | 'webpack';
+	oncompile?: ({ type, result }: { type: string, result: CompileResult }) => void;
+};
+
+export async function build({
+	cwd,
+	src = 'src',
+	routes = 'src/routes',
+	output = 'src/node_modules/@sapper',
+	static: static_files = 'static',
+	dest = '__sapper__/build',
+
+	bundler,
+	legacy = false,
+	oncompile = noop
+}: Opts = {}) {
+	bundler = validate_bundler(bundler);
+
+	cwd = path.resolve(cwd);
+	src = path.resolve(cwd, src);
+	dest = path.resolve(cwd, dest);
+	routes = path.resolve(cwd, routes);
+	output = path.resolve(cwd, output);
+	static_files = path.resolve(cwd, static_files);
+
+	if (legacy && bundler === 'webpack') {
+		throw new Error(`Legacy builds are not supported for projects using webpack`);
+	}
+
+	rimraf.sync(path.join(output, '**/*'));
+	mkdirp.sync(output);
+	copy_runtime(output);
+
+	rimraf.sync(path.join(dest, '**/*'));
+	mkdirp.sync(`${dest}/client`);
+	copy_shimport(dest);
+
+	// minify src/template.html
+	// TODO compile this to a function? could be quicker than str.replace(...).replace(...).replace(...)
+	const template = read_template(src);
+
+	// remove this in a future version
+	if (template.indexOf('%sapper.base%') === -1) {
+		const error = new Error(`As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`);
+		error.code = `missing-sapper-base`;
+		throw error;
+	}
+
+	fs.writeFileSync(`${dest}/template.html`, minify_html(template));
+
+	const manifest_data = create_manifest_data(routes);
+
+	// create src/node_modules/@sapper/app.mjs and server.mjs
+	create_main_manifests({
+		bundler,
+		manifest_data,
+		cwd,
+		src,
+		dest,
+		routes,
+		output,
+		dev: false
+	});
+
+	const { client, server, serviceworker } = await create_compilers(bundler, cwd, src, dest, true);
+
+	const client_result = await client.compile();
+	oncompile({
+		type: 'client',
+		result: client_result
+	});
+
+	const build_info = client_result.to_json(manifest_data, { src, routes, dest });
+
+	if (legacy) {
+		process.env.SAPPER_LEGACY_BUILD = 'true';
+		const { client } = await create_compilers(bundler, cwd, src, dest, true);
+
+		const client_result = await client.compile();
+
+		oncompile({
+			type: 'client (legacy)',
+			result: client_result
+		});
+
+		client_result.to_json(manifest_data, { src, routes, dest });
+		build_info.legacy_assets = client_result.assets;
+		delete process.env.SAPPER_LEGACY_BUILD;
+	}
+
+	fs.writeFileSync(path.join(dest, 'build.json'), JSON.stringify(build_info));
+
+	const server_stats = await server.compile();
+	oncompile({
+		type: 'server',
+		result: server_stats
+	});
+
+	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,
+			static_files
+		});
+
+		serviceworker_stats = await serviceworker.compile();
+
+		oncompile({
+			type: 'serviceworker',
+			result: serviceworker_stats
+		});
+	}
+}

src/api/dev.ts

@@ -0,0 +1,513 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import * as http from 'http';
+import * as child_process from 'child_process';
+import * as ports from 'port-authority';
+import mkdirp from 'mkdirp';
+import rimraf from 'rimraf';
+import { EventEmitter } from 'events';
+import { create_manifest_data, create_main_manifests, create_compilers, create_serviceworker_manifest } from '../core';
+import { Compiler, Compilers } from '../core/create_compilers';
+import { CompileResult } from '../core/create_compilers/interfaces';
+import Deferred from './utils/Deferred';
+import validate_bundler from './utils/validate_bundler';
+import { copy_shimport } from './utils/copy_shimport';
+import { ManifestData, FatalEvent, ErrorEvent, ReadyEvent, InvalidEvent } from '../interfaces';
+import read_template from '../core/read_template';
+import { noop } from './utils/noop';
+import { copy_runtime } from './utils/copy_runtime';
+
+type Opts = {
+	cwd?: string,
+	src?: string,
+	dest?: string,
+	routes?: string,
+	output?: string,
+	static?: string,
+	'dev-port'?: number,
+	live?: boolean,
+	hot?: boolean,
+	'devtools-port'?: number,
+	bundler?: 'rollup' | 'webpack',
+	port?: number
+};
+
+export function dev(opts: Opts) {
+	return new Watcher(opts);
+}
+
+class Watcher extends EventEmitter {
+	bundler: 'rollup' | 'webpack';
+	dirs: {
+		cwd: string;
+		src: string;
+		dest: string;
+		routes: string;
+		output: string;
+		static: 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 }>;
+	deferred: Deferred;
+
+	crashed: boolean;
+	restarting: boolean;
+	current_build: {
+		changed: Set<string>;
+		rebuilding: Set<string>;
+		unique_warnings: Set<string>;
+		unique_errors: Set<string>;
+	}
+
+	constructor({
+		cwd = '.',
+		src = 'src',
+		routes = 'src/routes',
+		output = 'src/node_modules/@sapper',
+		static: static_files = 'static',
+		dest = '__sapper__/dev',
+		'dev-port': dev_port,
+		live,
+		hot,
+		'devtools-port': devtools_port,
+		bundler,
+		port = +process.env.PORT
+	}: Opts) {
+		super();
+
+		cwd = path.resolve(cwd);
+
+		this.bundler = validate_bundler(bundler);
+		this.dirs = {
+			cwd,
+			src: path.resolve(cwd, src),
+			dest: path.resolve(cwd, dest),
+			routes: path.resolve(cwd, routes),
+			output: path.resolve(cwd, output),
+			static: path.resolve(cwd, static_files)
+		};
+
+		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 = {
+			changed: new Set(),
+			rebuilding: new Set(),
+			unique_errors: new Set(),
+			unique_warnings: new Set()
+		};
+
+		// remove this in a future version
+		const template = read_template(src);
+		if (template.indexOf('%sapper.base%') === -1) {
+			const error = new Error(`As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`);
+			error.code = `missing-sapper-base`;
+			throw error;
+		}
+
+		process.env.NODE_ENV = 'development';
+
+		process.on('exit', () => {
+			this.close();
+		});
+
+		this.init();
+	}
+
+	async init() {
+		if (this.port) {
+			if (!await ports.check(this.port)) {
+				this.emit('fatal', <FatalEvent>{
+					message: `Port ${this.port} is unavailable`
+				});
+				return;
+			}
+		} else {
+			this.port = await ports.find(3000);
+		}
+
+		const { cwd, src, dest, routes, output, static: static_files } = this.dirs;
+
+		rimraf.sync(path.join(output, '**/*'));
+		mkdirp.sync(output);
+		copy_runtime(output);
+
+		rimraf.sync(dest);
+		mkdirp.sync(`${dest}/client`);
+		if (this.bundler === 'rollup') copy_shimport(dest);
+
+		if (!this.dev_port) this.dev_port = await ports.find(10000);
+
+		// Chrome looks for debugging targets on ports 9222 and 9229 by default
+		if (!this.devtools_port) this.devtools_port = await ports.find(9222);
+
+		let manifest_data: ManifestData;
+
+		try {
+			manifest_data = create_manifest_data(routes);
+			create_main_manifests({
+				bundler: this.bundler,
+				manifest_data,
+				dev: true,
+				dev_port: this.dev_port,
+				cwd, src, dest, routes, output
+			});
+		} catch (err) {
+			this.emit('fatal', <FatalEvent>{
+				message: err.message
+			});
+			return;
+		}
+
+		this.dev_server = new DevServer(this.dev_port);
+
+		this.filewatchers.push(
+			watch_dir(
+				routes,
+				({ path: file, stats }) => {
+					if (stats.isDirectory()) {
+						return path.basename(file)[0] !== '_';
+					}
+					return true;
+				},
+				() => {
+					try {
+						const new_manifest_data = create_manifest_data(routes);
+						create_main_manifests({
+							bundler: this.bundler,
+							manifest_data, // TODO is this right? not new_manifest_data?
+							dev: true,
+							dev_port: this.dev_port,
+							cwd, src, dest, routes, output
+						});
+
+						manifest_data = new_manifest_data;
+					} catch (err) {
+						this.emit('error', <ErrorEvent>{
+							message: err.message
+						});
+					}
+				}
+			),
+
+			fs.watch(`${src}/template.html`, () => {
+				this.dev_server.send({
+					action: 'reload'
+				});
+			})
+		);
+
+		let deferred = new Deferred();
+
+		// TODO watch the configs themselves?
+		const compilers: Compilers = await create_compilers(this.bundler, cwd, src, dest, false);
+
+		const emitFatal = () => {
+			this.emit('fatal', <FatalEvent>{
+				message: `Server crashed`
+			});
+
+			this.crashed = true;
+			this.proc = null;
+		};
+
+		this.watch(compilers.server, {
+			name: 'server',
+
+			invalid: filename => {
+				this.restart(filename, 'server');
+			},
+
+			handle_result: (result: CompileResult) => {
+				deferred.promise.then(() => {
+					const restart = () => {
+						this.crashed = false;
+
+						ports.wait(this.port)
+							.then((() => {
+								this.emit('ready', <ReadyEvent>{
+									port: this.port,
+									process: this.proc
+								});
+
+								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;
+
+								this.emit('fatal', <FatalEvent>{
+									message: `Server is not listening on port ${this.port}`
+								});
+							});
+					};
+
+					if (this.proc) {
+						this.proc.removeListener('exit', emitFatal);
+						this.proc.kill();
+						this.proc.on('exit', restart);
+					} else {
+						restart();
+					}
+
+					// we need to give the child process its own DevTools port,
+					// otherwise Node will try to use the parent's (and fail)
+					const debugArgRegex = /--inspect(?:-brk|-port)?|--debug-port/;
+					const execArgv = process.execArgv.slice();
+					if (execArgv.some((arg: string) => !!arg.match(debugArgRegex))) {
+						execArgv.push(`--inspect-port=${this.devtools_port}`);
+					}
+
+					this.proc = child_process.fork(`${dest}/server/server.js`, [], {
+						cwd: process.cwd(),
+						env: Object.assign({
+							PORT: this.port
+						}, process.env),
+						stdio: ['ipc'],
+						execArgv
+					});
+
+					this.proc.stdout.on('data', chunk => {
+						this.emit('stdout', chunk);
+					});
+
+					this.proc.stderr.on('data', chunk => {
+						this.emit('stderr', chunk);
+					});
+
+					this.proc.on('message', message => {
+						if (message.__sapper__ && message.event === 'basepath') {
+							this.emit('basepath', {
+								basepath: message.basepath
+							});
+						}
+					});
+
+					this.proc.on('exit', emitFatal);
+				});
+			}
+		});
+
+		this.watch(compilers.client, {
+			name: 'client',
+
+			invalid: filename => {
+				this.restart(filename, 'client');
+				deferred = new Deferred();
+
+				// TODO we should delete old assets. due to a webpack bug
+				// i don't even begin to comprehend, this is apparently
+				// quite difficult
+			},
+
+			handle_result: (result: CompileResult) => {
+				fs.writeFileSync(
+					path.join(dest, 'build.json'),
+
+					// TODO should be more explicit that to_json has effects
+					JSON.stringify(result.to_json(manifest_data, this.dirs), null, '  ')
+				);
+
+				const client_files = result.chunks.map(chunk => `client/${chunk.file}`);
+
+				create_serviceworker_manifest({
+					manifest_data,
+					output,
+					client_files,
+					static_files
+				});
+
+				deferred.fulfil();
+
+				// we need to wait a beat before watching the service
+				// worker, because of some webpack nonsense
+				setTimeout(watch_serviceworker, 100);
+			}
+		});
+
+		let watch_serviceworker = compilers.serviceworker
+			? () => {
+				watch_serviceworker = noop;
+
+				this.watch(compilers.serviceworker, {
+					name: 'service worker'
+				});
+			}
+			: noop;
+	}
+
+	close() {
+		if (this.closed) return;
+		this.closed = true;
+
+		if (this.dev_server) this.dev_server.close();
+
+		if (this.proc) this.proc.kill();
+		this.filewatchers.forEach(watcher => {
+			watcher.close();
+		});
+	}
+
+	restart(filename: string, type: string) {
+		if (this.restarting) {
+			this.current_build.changed.add(filename);
+			this.current_build.rebuilding.add(type);
+		} else {
+			this.restarting = true;
+
+			this.current_build = {
+				changed: new Set([filename]),
+				rebuilding: new Set([type]),
+				unique_warnings: new Set(),
+				unique_errors: new Set()
+			};
+
+			process.nextTick(() => {
+				this.emit('invalid', <InvalidEvent>{
+					changed: Array.from(this.current_build.changed),
+					invalid: {
+						server: this.current_build.rebuilding.has('server'),
+						client: this.current_build.rebuilding.has('client'),
+						serviceworker: this.current_build.rebuilding.has('serviceworker'),
+					}
+				});
+
+				this.restarting = false;
+			});
+		}
+	}
+
+	watch(compiler: Compiler, { name, invalid = noop, handle_result = noop }: {
+		name: string,
+		invalid?: (filename: string) => void;
+		handle_result?: (result: CompileResult) => void;
+	}) {
+		compiler.oninvalid(invalid);
+
+		compiler.watch((err?: Error, result?: CompileResult) => {
+			if (err) {
+				this.emit('error', <ErrorEvent>{
+					type: name,
+					message: err.message
+				});
+			} else {
+				this.emit('build', {
+					type: name,
+
+					duration: result.duration,
+					errors: result.errors,
+					warnings: result.warnings
+				});
+
+				handle_result(result);
+			}
+		});
+	}
+}
+
+const INTERVAL = 10000;
+
+class DevServer {
+	clients: Set<http.ServerResponse>;
+	interval: NodeJS.Timer;
+	_: http.Server;
+
+	constructor(port: number, interval = 10000) {
+		this.clients = new Set();
+
+		this._ = http.createServer((req, res) => {
+			if (req.url !== '/__sapper__') return;
+
+			req.socket.setKeepAlive(true);
+			res.writeHead(200, {
+				'Access-Control-Allow-Origin': '*',
+				'Access-Control-Allow-Headers': 'Cache-Control',
+				'Content-Type': 'text/event-stream;charset=utf-8',
+				'Cache-Control': 'no-cache, no-transform',
+				'Connection': 'keep-alive',
+				// While behind nginx, event stream should not be buffered:
+				// http://nginx.org/docs/http/ngx_http_proxy_module.html#proxy_buffering
+				'X-Accel-Buffering': 'no'
+			});
+
+			res.write('\n');
+
+			this.clients.add(res);
+			req.on('close', () => {
+				this.clients.delete(res);
+			});
+		});
+
+		this._.listen(port);
+
+		this.interval = setInterval(() => {
+			this.send(null);
+		}, INTERVAL);
+	}
+
+	close() {
+		this._.close();
+		clearInterval(this.interval);
+	}
+
+	send(data: any) {
+		this.clients.forEach(client => {
+			client.write(`data: ${JSON.stringify(data)}\n\n`);
+		});
+	}
+}
+
+function watch_dir(
+	dir: string,
+	filter: ({ path, stats }: { path: string, stats: fs.Stats }) => boolean,
+	callback: () => void
+) {
+	let watch: any;
+	let closed = false;
+
+	import('cheap-watch').then(({ default: CheapWatch }) => {
+		if (closed) return;
+
+		watch = new CheapWatch({ dir, filter, debounce: 50 });
+
+		watch.on('+', ({ isNew }: { isNew: boolean }) => {
+			if (isNew) callback();
+		});
+
+		watch.on('-', callback);
+
+		watch.init();
+	});
+
+	return {
+		close: () => {
+			if (watch) watch.close();
+			closed = true;
+		}
+	};
+}

src/api/export.ts

@@ -0,0 +1,202 @@
+import * as child_process from 'child_process';
+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';
+import Deferred from './utils/Deferred';
+import { noop } from './utils/noop';
+
+type Opts = {
+	build_dir?: string,
+	export_dir?: string,
+	cwd?: string,
+	static?: string,
+	basepath?: string,
+	timeout?: number | false,
+	oninfo?: ({ message }: { message: string }) => void;
+	onfile?: ({ file, size, status }: { file: string, size: number, status: number }) => void;
+};
+
+function resolve(from: string, to: string) {
+	return url.parse(url.resolve(from, to));
+}
+
+type URL = url.UrlWithStringQuery;
+
+export { _export as export };
+
+async function _export({
+	cwd,
+	static: static_files = 'static',
+	build_dir = '__sapper__/build',
+	export_dir = '__sapper__/export',
+	basepath = '',
+	timeout = 5000,
+	oninfo = noop,
+	onfile = noop
+}: Opts = {}) {
+	basepath = basepath.replace(/^\//, '')
+
+	cwd = path.resolve(cwd);
+	static_files = path.resolve(cwd, static_files);
+	build_dir = path.resolve(cwd, build_dir);
+	export_dir = path.resolve(cwd, export_dir, basepath);
+
+	// Prep output directory
+	sander.rimrafSync(export_dir);
+
+	sander.copydirSync(static_files).to(export_dir);
+	sander.copydirSync(build_dir, 'client').to(export_dir, 'client');
+
+	if (sander.existsSync(build_dir, 'service-worker.js')) {
+		sander.copyFileSync(build_dir, 'service-worker.js').to(export_dir, 'service-worker.js');
+	}
+
+	if (sander.existsSync(build_dir, 'service-worker.js.map')) {
+		sander.copyFileSync(build_dir, 'service-worker.js.map').to(export_dir, 'service-worker.js.map');
+	}
+
+	const port = await ports.find(3000);
+
+	const protocol = 'http:';
+	const host = `localhost:${port}`;
+	const origin = `${protocol}//${host}`;
+
+	const root = resolve(origin, basepath);
+	if (!root.href.endsWith('/')) root.href += '/';
+
+	oninfo({
+		message: `Crawling ${root.href}`
+	});
+
+	const proc = child_process.fork(path.resolve(`${build_dir}/server/server.js`), [], {
+		cwd,
+		env: Object.assign({
+			PORT: port,
+			NODE_ENV: 'production',
+			SAPPER_EXPORT: 'true'
+		}, process.env)
+	});
+
+	const seen = new Set();
+	const saved = new Set();
+
+	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 = type === 'text/html';
+
+		if (is_html) {
+			if (pathname !== '/service-worker-index.html') {
+				file = file === '' ? 'index.html' : `${file}/index.html`;
+			}
+			body = minify_html(body);
+		}
+
+		onfile({
+			file,
+			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) {
+		let pathname = url.pathname;
+		if (pathname !== '/service-worker-index.html') {
+		  pathname = pathname.replace(root.pathname, '') || '/'
+		}
+
+		if (seen.has(pathname)) return;
+		seen.add(pathname);
+
+		const timeout_deferred = new Deferred();
+		const the_timeout = setTimeout(() => {
+			timeout_deferred.reject(new Error(`Timed out waiting for ${url.href}`));
+		}, timeout);
+
+		const r = await Promise.race([
+			fetch(url.href, {
+				redirect: 'manual'
+			}),
+			timeout_deferred.promise
+		]);
+
+		clearTimeout(the_timeout); // prevent it hanging at the end
+
+		let type = r.headers.get('Content-Type');
+		let body = await r.text();
+
+		const range = ~~(r.status / 100);
+
+		if (range === 2) {
+			if (type === 'text/html' && pathname !== '/service-worker-index.html') {
+				const cleaned = clean_html(body);
+
+				const q = yootils.queue(8);
+				let promise;
+
+				const base_match = /<base ([\s\S]+?)>/m.exec(cleaned);
+				const base_href = base_match && get_href(base_match[1]);
+				const base = resolve(url.href, base_href);
+
+				let match;
+				let pattern = /<a ([\s\S]+?)>/gm;
+
+				while (match = pattern.exec(cleaned)) {
+					const attrs = match[1];
+					const href = get_href(attrs);
+
+					if (href) {
+						const url = resolve(base.href, href);
+
+						if (url.protocol === protocol && url.host === host) {
+							promise = q.add(() => handle(url));
+						}
+					}
+				}
+
+				await promise;
+			}
+		}
+
+		if (range === 3) {
+			const location = r.headers.get('Location');
+
+			type = 'text/html';
+			body = `<script>window.location.href = "${location.replace(origin, '')}"</script>`;
+
+			await handle(resolve(root.href, location));
+		}
+
+		save(pathname, r.status, type, body);
+	}
+
+	return ports.wait(port)
+		.then(() => handle(root))
+		.then(() => handle(resolve(root.href, 'service-worker-index.html')))
+		.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

@@ -0,0 +1,13 @@
+import { create_manifest_data } from '../core';
+
+export function find_page(pathname: string, cwd = 'src/routes') {
+	const { pages } = create_manifest_data(cwd);
+
+	for (let i = 0; i < pages.length; i += 1) {
+		const page = pages[i];
+
+		if (page.pattern.test(pathname)) {
+			return page.parts[page.parts.length - 1].component.file;
+		}
+	}
+}

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_runtime.ts

@@ -0,0 +1,21 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import mkdirp from 'mkdirp';
+
+const runtime = [
+	'app.mjs',
+	'server.mjs',
+	'internal/shared.mjs',
+	'internal/Sapper.html',
+	'internal/layout.html'
+].map(file => ({
+	file,
+	source: fs.readFileSync(path.join(__dirname, `../runtime/${file}`), 'utf-8')
+}));
+
+export function copy_runtime(output: string) {
+	runtime.forEach(({ file, source }) => {
+		mkdirp.sync(path.dirname(`${output}/${file}`));
+		fs.writeFileSync(`${output}/${file}`, source);
+	});
+}

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

@@ -1,14 +1,15 @@
 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,
 		conservativeCollapse: true,
 		decodeEntities: true,
 		html5: true,
+		ignoreCustomComments: [/^#/],
 		minifyCSS: true,
-		minifyJS: true,
+		minifyJS: false,
 		removeAttributeQuotes: true,
 		removeComments: true,
 		removeOptionalTags: true,

src/api/utils/noop.ts

@@ -0,0 +1 @@
+export function noop() {}

src/api/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/cli.ts

@@ -1,80 +1,287 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import * as child_process from 'child_process';
 import sade from 'sade';
-import * as clorox from 'clorox';
-import prettyMs from 'pretty-ms';
-// import upgrade from './cli/upgrade';
-import * as ports from 'port-authority';
+import colors from 'kleur';
 import * as pkg from '../package.json';
+import { elapsed, repeat, left_pad, format_milliseconds } from './utils';
+import { InvalidEvent, ErrorEvent, FatalEvent, BuildEvent, ReadyEvent } from './interfaces';
 
 const prog = sade('sapper').version(pkg.version);
 
+if (process.argv[2] === 'start') {
+	// remove this in a future version
+	console.error(colors.bold().red(`'sapper start' has been removed`));
+	console.error(`Use 'node [build_dir]' instead`);
+	process.exit(1);
+}
+
+const start = Date.now();
+
 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 }) => {
-		const { dev } = await import('./cli/dev');
-		dev(opts);
+	.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)')
+	.option('--cwd', 'Current working directory', '.')
+	.option('--src', 'Source directory', 'src')
+	.option('--routes', 'Routes directory', 'src/routes')
+	.option('--static', 'Static files directory', 'static')
+	.option('--output', 'Sapper output directory', 'src/node_modules/@sapper')
+	.option('--build-dir', 'Development build directory', '__sapper__/dev')
+	.action(async (opts: {
+		port: number,
+		open: boolean,
+		'dev-port': number,
+		live: boolean,
+		hot: boolean,
+		bundler?: 'rollup' | 'webpack',
+		cwd: string,
+		src: string,
+		routes: string,
+		static: string,
+		output: string,
+		'build-dir': string
+	}) => {
+		const { dev } = await import('./api/dev');
+
+		try {
+			const watcher = dev({
+				cwd: opts.cwd,
+				src: opts.src,
+				routes: opts.routes,
+				static: opts.static,
+				output: opts.output,
+				dest: opts['build-dir'],
+				port: opts.port,
+				'dev-port': opts['dev-port'],
+				live: opts.live,
+				hot: opts.hot,
+				bundler: opts.bundler
+			});
+
+			let first = true;
+
+			watcher.on('stdout', data => {
+				process.stdout.write(data);
+			});
+
+			watcher.on('stderr', data => {
+				process.stderr.write(data);
+			});
+
+			watcher.on('ready', async (event: ReadyEvent) => {
+				if (first) {
+					console.log(colors.bold().cyan(`> Listening on http://localhost:${event.port}`));
+					if (opts.open) {
+						const { exec } = await import('child_process');
+						exec(`open http://localhost:${event.port}`);
+					}
+					first = false;
+				}
+			});
+
+			watcher.on('invalid', (event: InvalidEvent) => {
+				const changed = event.changed.map(filename => path.relative(process.cwd(), filename)).join(', ');
+				console.log(`\n${colors.bold().cyan(changed)} changed. rebuilding...`);
+			});
+
+			watcher.on('error', (event: ErrorEvent) => {
+				console.log(colors.red(`✗ ${event.type}`));
+				console.log(colors.red(event.message));
+			});
+
+			watcher.on('fatal', (event: FatalEvent) => {
+				console.log(colors.bold().red(`> ${event.message}`));
+				if (event.log) console.log(event.log);
+			});
+
+			watcher.on('build', (event: BuildEvent) => {
+				if (event.errors.length) {
+					console.log(colors.bold().red(`✗ ${event.type}`));
+
+					event.errors.filter(e => !e.duplicate).forEach(error => {
+						if (error.file) console.log(colors.bold()(error.file));
+						console.log(error.message);
+					});
+
+					const hidden = event.errors.filter(e => e.duplicate).length;
+					if (hidden > 0) {
+						console.log(`${hidden} duplicate ${hidden === 1 ? 'error' : 'errors'} hidden\n`);
+					}
+				} else if (event.warnings.length) {
+					console.log(colors.bold().yellow(`• ${event.type}`));
+
+					event.warnings.filter(e => !e.duplicate).forEach(warning => {
+						if (warning.file) console.log(colors.bold()(warning.file));
+						console.log(warning.message);
+					});
+
+					const hidden = event.warnings.filter(e => e.duplicate).length;
+					if (hidden > 0) {
+						console.log(`${hidden} duplicate ${hidden === 1 ? 'warning' : 'warnings'} hidden\n`);
+					}
+				} else {
+					console.log(`${colors.bold().green(`✔ ${event.type}`)} ${colors.gray(`(${format_milliseconds(event.duration)})`)}`);
+				}
+			});
+		} catch (err) {
+			console.log(colors.bold().red(`> ${err.message}`));
+			console.log(colors.gray(err.stack));
+			process.exit(1);
+		}
 	});
 
 prog.command('build [dest]')
 	.describe('Create a production-ready version of your app')
-	.action(async (dest = 'build') => {
+	.option('-p, --port', 'Default of process.env.PORT', '3000')
+	.option('--bundler', 'Specify a bundler (rollup or webpack, blank for auto)')
+	.option('--legacy', 'Create separate legacy build')
+	.option('--cwd', 'Current working directory', '.')
+	.option('--src', 'Source directory', 'src')
+	.option('--routes', 'Routes directory', 'src/routes')
+	.option('--output', 'Sapper output directory', 'src/node_modules/@sapper')
+	.example(`build custom-dir -p 4567`)
+	.action(async (dest = '__sapper__/build', opts: {
+		port: string,
+		legacy: boolean,
+		bundler?: 'rollup' | 'webpack',
+		cwd: string,
+		src: string,
+		routes: string,
+		output: string
+	}) => {
 		console.log(`> Building...`);
 
-		process.env.NODE_ENV = 'production';
-		process.env.SAPPER_DEST = dest;
-
-		const start = Date.now();
-
 		try {
-			const { build } = await import('./cli/build');
-			await build();
-			console.error(`\n> Finished in ${elapsed(start)}. Type ${clorox.bold.cyan(dest === 'build' ? 'npx sapper start' : `npx sapper start ${dest}`)} to run the app.`);
-		} catch (err) {
-			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
-		}
-	});
+			await _build(opts.bundler, opts.legacy, opts.cwd, opts.src, opts.routes, opts.output, dest);
 
-prog.command('start [dir]')
-	.describe('Start your app')
-	.option('-p, --port', 'Specify a port')
-	.option('-o, --open', 'Open a browser window')
-	.action(async (dir = 'build', opts: { port: number, open: boolean }) => {
-		const { start } = await import('./cli/start');
-		start(dir, opts);
+			const launcher = path.resolve(dest, 'index.js');
+
+			fs.writeFileSync(launcher, `
+				// generated by sapper build at ${new Date().toISOString()}
+				process.env.NODE_ENV = process.env.NODE_ENV || 'production';
+				process.env.PORT = process.env.PORT || ${opts.port || 3000};
+
+				console.log('Starting server on port ' + process.env.PORT);
+				require('./server/server.js');
+			`.replace(/^\t+/gm, '').trim());
+
+			console.error(`\n> Finished in ${elapsed(start)}. Type ${colors.bold().cyan(`node ${dest}`)} to run the app.`);
+		} catch (err) {
+			console.log(`${colors.bold().red(`> ${err.message}`)}`);
+			console.log(colors.gray(err.stack));
+			process.exit(1);
+		}
 	});
 
 prog.command('export [dest]')
 	.describe('Export your app as static files (if possible)')
+	.option('--build', '(Re)build app before exporting', true)
 	.option('--basepath', 'Specify a base path')
-	.action(async (dest = 'export', opts: { basepath?: string }) => {
-		console.log(`> Building...`);
-
-		process.env.NODE_ENV = 'production';
-		process.env.SAPPER_DEST = '.sapper/.export';
-
-		const start = Date.now();
-
+	.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)')
+	.option('--cwd', 'Current working directory', '.')
+	.option('--src', 'Source directory', 'src')
+	.option('--routes', 'Routes directory', 'src/routes')
+	.option('--static', 'Static files directory', 'static')
+	.option('--output', 'Sapper output directory', 'src/node_modules/@sapper')
+	.option('--build-dir', 'Intermediate build directory', '__sapper__/build')
+	.action(async (dest = '__sapper__/export', opts: {
+		build: boolean,
+		legacy: boolean,
+		bundler?: 'rollup' | 'webpack',
+		basepath?: string,
+		timeout: number | false,
+		cwd: string,
+		src: string,
+		routes: string,
+		static: string,
+		output: string,
+		'build-dir': string,
+	}) => {
 		try {
-			const { build } = await import('./cli/build');
-			await build();
-			console.error(`\n> Built in ${elapsed(start)}. Crawling site...`);
+			if (opts.build) {
+				console.log(`> Building...`);
+				await _build(opts.bundler, opts.legacy, opts.cwd, opts.src, opts.routes, opts.output, opts['build-dir']);
+				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 ${clorox.bold.cyan(`npx serve ${dest}`)} to run the app.`);
+			const { export: _export } = await import('./api/export');
+			const { default: pb } = await import('pretty-bytes');
+
+			await _export({
+				cwd: opts.cwd,
+				static: opts.static,
+				build_dir: opts['build-dir'],
+				export_dir: dest,
+				basepath: opts.basepath,
+				timeout: opts.timeout,
+
+				oninfo: event => {
+					console.log(colors.bold().cyan(`> ${event.message}`));
+				},
+
+				onfile: event => {
+					const size_color = event.size > 150000 ? colors.bold().red : event.size > 50000 ? colors.bold().yellow : colors.bold().gray;
+						const size_label = size_color(left_pad(pb(event.size), 10));
+
+						const file_label = event.status === 200
+							? event.file
+							: colors.bold()[event.status >= 400 ? 'red' : 'yellow'](`(${event.status}) ${event.file}`);
+
+						console.log(`${size_label}   ${file_label}`);
+				}
+			});
+
+			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);
 		}
 	});
 
-// TODO upgrade
-
 prog.parse(process.argv);
 
-function elapsed(start: number) {
-	return prettyMs(Date.now() - start);
+
+async function _build(
+	bundler: 'rollup' | 'webpack',
+	legacy: boolean,
+	cwd: string,
+	src: string,
+	routes: string,
+	output: string,
+	dest: string
+) {
+	const { build } = await import('./api/build');
+
+	await build({
+		bundler,
+		legacy,
+		cwd,
+		src,
+		routes,
+		dest,
+
+		oncompile: event => {
+			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());
+		}
+	});
 }

src/cli/build.ts

@@ -1,76 +0,0 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import * as clorox from 'clorox';
-import mkdirp from 'mkdirp';
-import rimraf from 'rimraf';
-import { minify_html } from './utils/minify_html';
-import { create_compilers, create_main_manifests, create_routes, create_serviceworker_manifest } from '../core'
-import { locations } from '../config';
-
-export async function build() {
-	const output = locations.dest();
-
-	mkdirp.sync(output);
-	rimraf.sync(path.join(output, '**/*'));
-
-	// minify app/template.html
-	// TODO compile this to a function? could be quicker than str.replace(...).replace(...).replace(...)
-	const template = fs.readFileSync(`${locations.app()}/template.html`, 'utf-8');
-
-	// remove this in a future version
-	if (template.indexOf('%sapper.base%') === -1) {
-		console.log(`${clorox.bold.red(`> As of Sapper v0.10, your template.html file must include %sapper.base% in the <head>`)}`);
-		process.exit(1);
-	}
-
-	fs.writeFileSync(`${output}/template.html`, minify_html(template));
-
-	const routes = create_routes();
-
-	// create app/manifest/client.js and app/manifest/server.js
-	create_main_manifests({ routes });
-
-	const { client, server, serviceworker } = create_compilers();
-
-	const client_stats = await compile(client);
-	console.log(`${clorox.inverse(`\nbuilt client`)}`);
-	console.log(client_stats.toString({ colors: true }));
-	fs.writeFileSync(path.join(output, 'client_info.json'), JSON.stringify(client_stats.toJson()));
-
-	const server_stats = await compile(server);
-	console.log(`${clorox.inverse(`\nbuilt server`)}`);
-	console.log(server_stats.toString({ colors: true }));
-
-	let serviceworker_stats;
-
-	if (serviceworker) {
-		create_serviceworker_manifest({
-			routes,
-			client_files: client_stats.toJson().assets.map((chunk: { name: string }) => `client/${chunk.name}`)
-		});
-
-		serviceworker_stats = await compile(serviceworker);
-		console.log(`${clorox.inverse(`\nbuilt service worker`)}`);
-		console.log(serviceworker_stats.toString({ colors: true }));
-	}
-}
-
-function compile(compiler: any) {
-	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/cli/dev.ts

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

src/cli/export.ts

@@ -1,106 +0,0 @@
-import * as child_process from 'child_process';
-import * as path from 'path';
-import * as sander from 'sander';
-import * as clorox from 'clorox';
-import cheerio from 'cheerio';
-import URL from 'url-parse';
-import fetch from 'node-fetch';
-import * as ports from 'port-authority';
-import prettyBytes from 'pretty-bytes';
-import { minify_html } from './utils/minify_html';
-import { locations } from '../config';
-
-export async function exporter(export_dir: string, { basepath = '' }) {
-	const build_dir = locations.dest();
-
-	export_dir = path.join(export_dir, basepath);
-
-	// Prep output directory
-	sander.rimrafSync(export_dir);
-
-	sander.copydirSync('assets').to(export_dir);
-	sander.copydirSync(build_dir, 'client').to(export_dir, 'client');
-
-	if (sander.existsSync(build_dir, 'service-worker.js')) {
-		sander.copyFileSync(build_dir, 'service-worker.js').to(export_dir, 'service-worker.js');
-	}
-
-	if (sander.existsSync(build_dir, 'service-worker.js.map')) {
-		sander.copyFileSync(build_dir, 'service-worker.js.map').to(export_dir, 'service-worker.js.map');
-	}
-
-	const port = await ports.find(3000);
-
-	const origin = `http://localhost:${port}`;
-
-	const proc = child_process.fork(path.resolve(`${build_dir}/server.js`), [], {
-		cwd: process.cwd(),
-		env: {
-			PORT: port,
-			NODE_ENV: 'production',
-			SAPPER_DEST: build_dir,
-			SAPPER_EXPORT: 'true'
-		}
-	});
-
-	const seen = new Set();
-	const saved = new Set();
-
-	proc.on('message', message => {
-		if (!message.__sapper__) return;
-
-		let file = new URL(message.url, origin).pathname.slice(1);
-		let { body } = message;
-
-		if (saved.has(file)) return;
-		saved.add(file);
-
-		const is_html = message.type === 'text/html';
-
-		if (is_html) {
-			file = file === '' ? 'index.html' : `${file}/index.html`;
-			body = minify_html(body);
-		}
-
-		console.log(`${clorox.bold.cyan(file)} ${clorox.gray(`(${prettyBytes(body.length)})`)}`);
-
-		sander.writeFileSync(export_dir, file, body);
-	});
-
-	async function handle(url: URL) {
-		const r = await fetch(url.href);
-		const range = ~~(r.status / 100);
-
-		if (range >= 4) {
-			console.log(`${clorox.red(`> Received ${r.status} response when fetching ${url.pathname}`)}`);
-			return;
-		}
-
-		if (range === 2) {
-			if (r.headers.get('Content-Type') === 'text/html') {
-				const body = await r.text();
-				const $ = cheerio.load(body);
-				const urls: URL[] = [];
-
-				const base = new URL($('base').attr('href') || '/', url.href);
-
-				$('a[href]').each((i: number, $a) => {
-					const url = new URL($a.attribs.href, base.href);
-
-					if (url.origin === origin && !seen.has(url.pathname)) {
-						seen.add(url.pathname);
-						urls.push(url);
-					}
-				});
-
-				for (const url of urls) {
-					await handle(url);
-				}
-			}
-		}
-	}
-
-	return ports.wait(port)
-		.then(() => handle(new URL(`/${basepath}`, origin))) // TODO all static routes
-		.then(() => proc.kill());
-}

src/cli/start.ts

@@ -1,39 +0,0 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import * as child_process from 'child_process';
-import * as clorox from 'clorox';
-import * as ports from 'port-authority';
-
-export async function start(dir: string, opts: { port: number, open: boolean }) {
-	let port = opts.port || +process.env.PORT;
-
-	const resolved = path.resolve(dir);
-	const server = path.resolve(dir, 'server.js');
-
-	if (!fs.existsSync(server)) {
-		console.log(clorox.bold.red(`> ${dir}/server.js does not exist — type ${clorox.bold.cyan(dir === 'build' ? `npx sapper build` : `npx sapper build ${dir}`)} to create it`));
-		return;
-	}
-
-	if (port) {
-		if (!await ports.check(port)) {
-			console.log(clorox.bold.red(`> Port ${port} is unavailable`));
-			return;
-		}
-	} else {
-		port = await ports.find(3000);
-	}
-
-	child_process.fork(server, [], {
-		cwd: process.cwd(),
-		env: Object.assign({
-			NODE_ENV: 'production',
-			PORT: port,
-			SAPPER_DEST: dir
-		}, process.env)
-	});
-
-	await ports.wait(port);
-	console.log(`${clorox.bold.cyan(`> Listening on http://localhost:${port}`)}`);
-	if (opts.open) child_process.exec(`open http://localhost:${port}`);
-}

src/cli/upgrade.ts

@@ -1,53 +0,0 @@
-import * as fs from 'fs';
-import * as clorox from 'clorox';
-
-export default async function upgrade() {
-	const upgraded = [
-		await upgrade_sapper_main()
-	].filter(Boolean);
-
-	if (upgraded.length === 0) {
-		console.log(`No changes!`);
-	}
-}
-
-async function upgrade_sapper_main() {
-	const _2xx = read('templates/2xx.html');
-	const _4xx = read('templates/4xx.html');
-	const _5xx = read('templates/5xx.html');
-
-	const pattern = /<script src='\%sapper\.main\%'><\/script>/;
-
-	let replaced = false;
-
-	['2xx', '4xx', '5xx'].forEach(code => {
-		const file = `templates/${code}.html`
-		const template = read(file);
-		if (!template) return;
-
-		if (/\%sapper\.main\%/.test(template)) {
-			if (!pattern.test(template)) {
-				console.log(`${clorox.red(`Could not replace %sapper.main% in ${file}`)}`);
-			} else {
-				write(file, template.replace(pattern, `%sapper.scripts%`));
-				console.log(`${clorox.green(`Replaced %sapper.main% in ${file}`)}`);
-				replaced = true;
-			}
-		}
-	});
-
-	return replaced;
-}
-
-function read(file: string) {
-	try {
-		return fs.readFileSync(file, 'utf-8');
-	} catch (err) {
-		console.error(err);
-		return null;
-	}
-}
-
-function write(file: string, data: string) {
-	fs.writeFileSync(file, data);
-}

src/config.ts

@@ -1,10 +0,0 @@
-import * as path from 'path';
-
-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/config/env.ts

@@ -0,0 +1,7 @@
+export let dev: boolean;
+export let src: string;
+export let dest: string;
+
+export const set_dev = (_: boolean) => dev = _;
+export const set_src = (_: string) => src = _;
+export const set_dest = (_: string) => dest = _;

src/config/rollup.ts

@@ -0,0 +1,53 @@
+import { dev, src, dest } from './env';
+
+export default {
+	dev,
+
+	client: {
+		input: () => {
+			return `${src}/client.js`
+		},
+
+		output: () => {
+			let dir = `${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: `${src}/server.js`
+			};
+		},
+
+		output: () => {
+			return {
+				dir: `${dest}/server`,
+				format: 'cjs',
+				sourcemap: dev
+			};
+		}
+	},
+
+	serviceworker: {
+		input: () => {
+			return `${src}/service-worker.js`;
+		},
+
+		output: () => {
+			return {
+				file: `${dest}/service-worker.js`,
+				format: 'iife'
+			}
+		}
+	}
+};

src/config/webpack.ts

@@ -1,18 +1,18 @@
-import { locations, dev } from './config';
+import { dev, src, dest } from './env';
 
 export default {
-	dev: dev(),
+	dev,
 
 	client: {
 		entry: () => {
 			return {
-				main: `${locations.app()}/client`
+				main: `${src}/client`
 			};
 		},
 
 		output: () => {
 			return {
-				path: `${locations.dest()}/client`,
+				path: `${dest}/client`,
 				filename: '[hash]/[name].js',
 				chunkFilename: '[hash]/[name].[id].js',
 				publicPath: `client/`
@@ -23,13 +23,13 @@ export default {
 	server: {
 		entry: () => {
 			return {
-				server: `${locations.app()}/server`
+				server: `${src}/server`
 			};
 		},
 
 		output: () => {
 			return {
-				path: locations.dest(),
+				path: `${dest}/server`,
 				filename: '[name].js',
 				chunkFilename: '[hash]/[name].[id].js',
 				libraryTarget: 'commonjs2'
@@ -40,13 +40,13 @@ export default {
 	serviceworker: {
 		entry: () => {
 			return {
-				'service-worker': `${locations.app()}/service-worker`
+				'service-worker': `${src}/service-worker`
 			};
 		},
 
 		output: () => {
 			return {
-				path: locations.dest(),
+				path: dest,
 				filename: '[name].js',
 				chunkFilename: '[name].[id].[hash].js'
 			}

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() {
-	const webpack = relative('webpack', process.cwd());
-
-	const serviceworker_config = try_require(path.resolve('webpack/service-worker.config.js'));
-
-	return {
-		client: webpack(
-			require(path.resolve('webpack/client.config.js'))
-		),
-
-		server: webpack(
-			require(path.resolve('webpack/server.config.js'))
-		),
-
-		serviceworker: serviceworker_config && webpack(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 +1,169 @@
+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(cwd: string) {
+		if (!rollup) rollup = relative('rollup', cwd);
+
+		const input = path.resolve(cwd, 'rollup.config.js');
+
+		const bundle = await rollup.rollup({
+			input,
+			inlineDynamicImports: true,
+			external: (id: string) => {
+				return (id[0] !== '.' && !path.isAbsolute(id)) || id.slice(-5, id.length) === '.json';
+			}
+		});
+
+		const resp = await bundle.generate({ format: 'cjs' });
+		const { code } = resp.output ? resp.output[0] : resp;
+
+		// 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 +1,119 @@
+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 } 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];
+				const chunk = compiler.chunks.find(chunk => file in chunk.modules);
+				if (chunk) this.assets[name] = chunk.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 +1,84 @@
+import format_messages from 'webpack-format-messages';
+import { CompileResult, BuildInfo, CompileError, Chunk, CssFile } from './interfaces';
+import { ManifestData, Dirs } from '../../interfaces';
+
+const locPattern = /\((\d+):(\d+)\)$/;
+
+function munge_warning_or_error(message: string) {
+	// TODO this is all a bit rube goldberg...
+	const lines = message.split('\n');
+
+	const file = lines.shift()
+		.replace('', '') // careful — there is a special character at the beginning of this string
+		.replace('', '')
+		.replace('./', '');
+
+	let line = null;
+	let column = null;
+
+	const match = locPattern.exec(lines[0]);
+	if (match) {
+		lines[0] = lines[0].replace(locPattern, '');
+		line = +match[1];
+		column = +match[2];
+	}
+
+	return {
+		file,
+		message: lines.join('\n')
+	};
+}
+
+export default class WebpackResult implements CompileResult {
+	duration: number;
+	errors: CompileError[];
+	warnings: CompileError[];
+	chunks: Chunk[];
+	assets: Record<string, string>;
+	css_files: CssFile[];
+	stats: any;
+
+	constructor(stats: any) {
+		this.stats = stats;
+
+		const info = stats.toJson();
+
+		const messages = format_messages(stats);
+
+		this.errors = messages.errors.map(munge_warning_or_error);
+		this.warnings = messages.warnings.map(munge_warning_or_error);
+
+		this.duration = info.time;
+
+		this.chunks = info.assets.map((chunk: { name: string }) => ({ file: chunk.name }));
+		this.assets = info.assetsByChunkName;
+	}
+
+	to_json(manifest_data: ManifestData, dirs: Dirs): BuildInfo {
+		const extract_css = (assets: string[] | string) => {
+			assets = Array.isArray(assets) ? assets : [assets];
+			return assets.find(asset => /\.css$/.test(asset));
+		};
+
+		return {
+			bundler: 'webpack',
+			shimport: null, // webpack has its own loader
+			assets: this.assets,
+			css: {
+				main: extract_css(this.assets.main),
+				chunks: Object
+					.keys(this.assets)
+					.filter(chunkName => chunkName !== 'main')
+					.reduce((chunks: { [key: string]: string }, chukName) => {
+						const assets = this.assets[chukName];
+						chunks[chukName] = extract_css(assets);
+						return chunks;
+					}, {})
+			}
+		};
+	}
+
+	print() {
+		return this.stats.toString({ colors: true });
+	}
+}

src/core/create_compilers/extract_css.ts

@@ -0,0 +1,248 @@
+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, Chunk } 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 (${id})`);
+		}
+
+		raw_map = url;
+		return '';
+	}).trim();
+
+	if (raw_map) {
+		if (raw_map.startsWith(inline_sourcemap_header)) {
+			const json = Buffer.from(raw_map.slice(inline_sourcemap_header.length), 'base64').toString();
+			map = JSON.parse(json);
+		} else {
+			// TODO do we want to handle non-inline sourcemaps? could be a rabbit hole
+		}
+	}
+
+	return {
+		code,
+		map
+	};
+}
+
+type SourceMap = {
+	version: 3;
+	file: string;
+	sources: string[];
+	sourcesContent: string[];
+	names: string[];
+	mappings: string;
+};
+
+function get_css_from_modules(modules: string[], css_map: Map<string, string>, dirs: Dirs) {
+	const parts: string[] = [];
+	const mappings: number[][][] = [];
+
+	const combined_map: SourceMap = {
+		version: 3,
+		file: null,
+		sources: [],
+		sourcesContent: [],
+		names: [],
+		mappings: null
+	};
+
+	modules.forEach(module => {
+		if (!/\.css$/.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(`${dirs.dest}/client`, source));
+
+		return {
+			code: parts.join('\n'),
+			map: combined_map
+		};
+	}
+
+	return null;
+}
+
+export default function extract_css(client_result: CompileResult, components: PageComponent[], dirs: Dirs) {
+	const result: {
+		main: string | null;
+		chunks: Record<string, string[]>
+	} = {
+		main: null,
+		chunks: {}
+	};
+
+	if (!client_result.css_files) return; // Rollup-only for now
+
+	let asset_dir = `${dirs.dest}/client`;
+	if (process.env.SAPPER_LEGACY_BUILD) asset_dir += '/legacy';
+
+	const unclaimed = new Set(client_result.css_files.map(x => x.id));
+
+	const lookup = new Map();
+	client_result.chunks.forEach(chunk => {
+		lookup.set(chunk.file, chunk);
+	});
+
+	const css_map = new Map();
+	client_result.css_files.forEach(css_module => {
+		css_map.set(css_module.id, css_module.code);
+	});
+
+	const chunks_with_css = new Set();
+
+	// concatenate and emit CSS
+	client_result.chunks.forEach(chunk => {
+		const css_modules = chunk.modules.filter(m => css_map.has(m));
+		if (!css_modules.length) return;
+
+		const css = get_css_from_modules(css_modules, css_map, dirs);
+
+		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, '  '));
+
+		chunks_with_css.add(chunk);
+	});
+
+	const entry = path.resolve(dirs.src, 'app.mjs');
+	const entry_chunk = client_result.chunks.find(chunk => chunk.modules.indexOf(entry) !== -1);
+
+	const entry_chunk_dependencies: Set<Chunk> = new Set([entry_chunk]);
+	const entry_css_modules: string[] = [];
+
+	// recursively find the chunks this component depends on
+	entry_chunk_dependencies.forEach(chunk => {
+		if (!chunk) return; // TODO why does this happen?
+
+		chunk.imports.forEach(file => {
+			entry_chunk_dependencies.add(lookup.get(file));
+		});
+
+		if (chunks_with_css.has(chunk)) {
+			chunk.modules.forEach(file => {
+				unclaimed.delete(file);
+				if (css_map.has(file)) {
+					entry_css_modules.push(file);
+				}
+			});
+		}
+	});
+
+	// figure out which (css-having) chunks each component depends on
+	components.forEach(component => {
+		const resolved = path.resolve(dirs.routes, component.file);
+		const chunk: Chunk = client_result.chunks.find(chunk => chunk.modules.indexOf(resolved) !== -1);
+
+		if (!chunk) {
+			// this should never happen!
+			return;
+			// throw new Error(`Could not find chunk that owns ${component.file}`);
+		}
+
+		const chunk_dependencies: Set<Chunk> = new Set([chunk]);
+		const css_dependencies: string[] = [];
+
+		// recursively find the chunks this component depends on
+		chunk_dependencies.forEach(chunk => {
+			if (!chunk) return; // TODO why does this happen?
+
+			chunk.imports.forEach(file => {
+				chunk_dependencies.add(lookup.get(file));
+			});
+
+			if (chunks_with_css.has(chunk)) {
+				css_dependencies.push(chunk.file.replace(/\.js$/, '.css'));
+
+				chunk.modules.forEach(file => {
+					unclaimed.delete(file);
+				});
+			}
+		});
+
+		result.chunks[component.file] = css_dependencies;
+	});
+
+	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(result.chunks[route]);
+		});
+
+		fs.writeFileSync(`${asset_dir}/${file}`, replaced);
+	});
+
+	unclaimed.forEach(file => {
+		entry_css_modules.push(file);
+	});
+
+	const leftover = get_css_from_modules(entry_css_modules, css_map, dirs);
+	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 +1,72 @@
+import * as path from 'path';
+import RollupCompiler from './RollupCompiler';
+import { WebpackCompiler } from './WebpackCompiler';
+import { set_dev, set_src, set_dest } from '../../config/env';
+
+export type Compiler = RollupCompiler | WebpackCompiler;
+
+export type Compilers = {
+	client: Compiler;
+	server: Compiler;
+	serviceworker?: Compiler;
+}
+
+export default async function create_compilers(
+	bundler: 'rollup' | 'webpack',
+	cwd: string,
+	src: string,
+	dest: string,
+	dev: boolean
+): Promise<Compilers> {
+	set_dev(dev);
+	set_src(src);
+	set_dest(dest);
+
+	if (bundler === 'rollup') {
+		const config = await RollupCompiler.load_config(cwd);
+		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(cwd, '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 +1,327 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import svelte from 'svelte/compiler';
+import { Page, PageComponent, ServerRoute, ManifestData } from '../interfaces';
+import { posixify, reserved_words } from '../utils';
+
+export default function create_manifest_data(cwd: string): 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/`);
+	}
+
+	function has_preload(file: string) {
+		const source = fs.readFileSync(path.join(cwd, file), 'utf-8');
+
+		if (/preload/.test(source)) {
+			try {
+				const { stats } = svelte.compile(source, {
+					generate: false,
+					onwarn: () => {}
+				});
+				return !!stats.vars.find((variable: any) => variable.module && variable.export_name === 'preload');
+			} catch (err) {}
+		}
+
+		return false;
+	}
+
+	const components: PageComponent[] = [];
+	const pages: Page[] = [];
+	const server_routes: ServerRoute[] = [];
+
+	const default_layout: PageComponent = {
+		default: true,
+		name: '_default_layout',
+		file: null,
+		has_preload: false
+	};
+
+	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: `${item.file}/_layout.html`,
+					has_preload: has_preload(`${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,
+					has_preload: has_preload(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',
+			has_preload: has_preload('_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

@@ -1,116 +1,242 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import * as glob from 'glob';
-import create_routes from './create_routes';
-import { posixify, write_if_changed } from './utils';
-import { dev, locations } from '../config';
-import { Route } from '../interfaces';
+import { posixify, stringify, walk, write_if_changed } from '../utils';
+import { Page, PageComponent, ManifestData } from '../interfaces';
 
-export function create_main_manifests({ routes, dev_port }: {
-	routes: Route[];
+export function create_main_manifests({
+	bundler,
+	manifest_data,
+	dev_port,
+	dev,
+	cwd,
+	src,
+	dest,
+	routes,
+	output
+}: {
+	bundler: string,
+	manifest_data: ManifestData;
 	dev_port?: number;
+	dev: boolean;
+	cwd: string;
+	src: string;
+	dest: string;
+	routes: string;
+	output: string
 }) {
-	const path_to_routes = path.relative(`${locations.app()}/manifest`, locations.routes());
+	if (!fs.existsSync(output)) fs.mkdirSync(output);
 
-	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(`${output}/internal`, 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(manifest_data, path_to_routes, bundler, dev, dev_port);
+	const server_manifest = generate_server_manifest(manifest_data, path_to_routes, cwd, src, dest, dev);
+
+	write_if_changed(`${output}/internal/manifest-client.mjs`, client_manifest);
+	write_if_changed(`${output}/internal/manifest-server.mjs`, server_manifest);
 }
 
-export function create_serviceworker_manifest({ routes, client_files }: {
-	routes: Route[];
+export function create_serviceworker_manifest({ manifest_data, output, client_files, static_files }: {
+	manifest_data: ManifestData;
+	output: string;
 	client_files: string[];
+	static_files: string;
 }) {
-	const assets = glob.sync('**', { cwd: 'assets', nodir: true });
+	let files: string[] = ['/service-worker-index.html'];
+
+	if (fs.existsSync(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/`);
+		}
+	}
 
 	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${routes.filter((r: Route) => r.type === 'page' && !/^_[45]xx$/.test(r.id)).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(`${locations.app()}/manifest/service-worker.js`, code);
+	write_if_changed(`${output}/service-worker.js`, code);
 }
 
-function generate_client(routes: Route[], path_to_routes: string, dev_port?: number) {
-	let code = `
-		// This file is generated by Sapper — do not edit it!
-		export const routes = [
-			${routes
-				.map(route => {
-					if (route.type !== 'page') {
-						return `{ pattern: ${route.pattern}, ignore: true }`;
-					}
+function generate_client_manifest(
+	manifest_data: ManifestData,
+	path_to_routes: string,
+	bundler: string,
+	dev: boolean,
+	dev_port?: number
+) {
+	const page_ids = new Set(manifest_data.pages.map(page =>
+		page.pattern.toString()));
 
-					const file = posixify(`${path_to_routes}/${route.file}`);
+	const server_routes_to_ignore = manifest_data.server_routes.filter(route =>
+		!page_ids.has(route.pattern.toString()));
 
-					if (route.id === '_4xx' || route.id === '_5xx') {
-						return `{ error: '${route.id.slice(1)}', load: () => import(/* webpackChunkName: "${route.id}" */ '${file}') }`;
-					}
+	const component_indexes: Record<string, number> = {};
 
-					const params = route.params.length === 0
-						? '{}'
-						: `{ ${route.params.map((part, i) => `${part}: match[${i + 1}]`).join(', ')} }`;
+	const components = `[
+		${manifest_data.components.map((component, i) => {
+			const annotation = bundler === 'webpack'
+				? `/* webpackChunkName: "${component.name}" */ `
+				: '';
 
-					return `{ pattern: ${route.pattern}, params: ${route.params.length > 0 ? `match` : `()`} => (${params}), load: () => import(/* webpackChunkName: "${route.id}" */ '${file}') }`;
-				})
-				.join(',\n\t')}
-		];`.replace(/^\t\t/gm, '').trim();
+			const source = get_file(path_to_routes, component);
 
-	if (dev()) {
-		const sapper_dev_client = posixify(
-			path.resolve(__dirname, '../sapper-dev-client.js')
-		);
+			component_indexes[component.name] = i;
 
-		code += `
+			return `{
+					js: () => import(${annotation}${stringify(source)}),
+					css: "__SAPPER_CSS_PLACEHOLDER:${stringify(component.file, false)}__"
+				}`;
+		}).join(',\n\t\t\t\t')}
+	]`.replace(/^\t/gm, '');
 
-			if (module.hot) {
-				import('${sapper_dev_client}').then(client => {
-					client.connect(${dev_port});
-				});
-			}`.replace(/^\t{3}/gm, '');
+	let needs_decode = false;
+
+	let routes = `[
+				${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(', ')} }) }`;
+							}
+
+							return `{ i: ${component_indexes[part.component.name]} }`;
+						}).join(',\n\t\t\t\t\t\t')}
+					]
+				}`).join(',\n\n\t\t\t\t')}
+	]`.replace(/^\t/gm, '');
+
+	if (needs_decode) {
+		routes = `(d => ${routes})(decodeURIComponent)`
 	}
 
-	return code;
+	return `
+		// This file is generated by Sapper — do not edit it!
+		export { default as Root } from '${stringify(get_file(path_to_routes, manifest_data.root), false)}';
+		export { preload as root_preload } from '${manifest_data.root.has_preload ? stringify(get_file(path_to_routes, manifest_data.root), false) : './shared'}';
+		export { default as ErrorComponent } from '${stringify(posixify(`${path_to_routes}/_error.html`), false)}';
+
+		export const ignore = [${server_routes_to_ignore.map(route => route.pattern).join(', ')}];
+
+		export const components = ${components};
+
+		export const routes = ${routes};
+
+		${dev ? `if (typeof window !== 'undefined') {
+			import(${stringify(posixify(path.resolve(__dirname, '../sapper-dev-client.js')))}).then(client => {
+				client.connect(${dev_port});
+			});
+		}` : ''}
+	`.replace(/^\t{2}/gm, '').trim();
 }
 
-function generate_server(routes: Route[], path_to_routes: string) {
+function generate_server_manifest(
+	manifest_data: ManifestData,
+	path_to_routes: string,
+	cwd: string,
+	src: string,
+	dest: string,
+	dev: boolean
+) {
+	const imports = [].concat(
+		manifest_data.server_routes.map((route, i) =>
+			`import * as route_${i} from ${stringify(posixify(`${path_to_routes}/${route.file}`))};`),
+		manifest_data.components.map((component, i) =>
+			`import component_${i}${component.has_preload ? `, { preload as preload_${i} }` : ''} from ${stringify(get_file(path_to_routes, component))};`),
+		`import root${manifest_data.root.has_preload ? `, { preload as root_preload }` : ''} from ${stringify(get_file(path_to_routes, manifest_data.root))};`,
+		`import error from ${stringify(posixify(`${path_to_routes}/_error.html`))};`
+	);
+
+	const component_lookup: Record<string, number> = {};
+	manifest_data.components.forEach((component, i) => {
+		component_lookup[component.name] = i;
+	});
+
 	let code = `
+		`.replace(/^\t\t/gm, '').trim();
+
+	const build_dir = posixify(path.relative(cwd, dest));
+	const src_dir = posixify(path.relative(cwd, src));
+
+	return `
 		// This file is generated by Sapper — do not edit it!
-		${routes
-			.map(route => {
-				const file = posixify(`${path_to_routes}/${route.file}`);
-				return route.type === 'page'
-					? `import ${route.id} from '${file}';`
-					: `import * as ${route.id} from '${file}';`;
-			})
-			.join('\n')}
+		${imports.join('\n')}
 
-		export const routes = [
-			${routes
-				.map(route => {
-					const file = posixify(`../../${route.file}`);
+		const d = decodeURIComponent;
 
-					if (route.id === '_4xx' || route.id === '_5xx') {
-						return `{ error: '${route.id.slice(1)}', module: ${route.id} }`;
-					}
+		export const manifest = {
+			server_routes: [
+				${manifest_data.server_routes.map((route, i) => `{
+					// ${route.file}
+					pattern: ${route.pattern},
+					handlers: route_${i},
+					params: ${route.params.length > 0
+						? `match => ({ ${route.params.map((param, i) => `${param}: d(match[${i + 1}])`).join(', ')} })`
+						: `() => ({})`}
+				}`).join(',\n\n\t\t\t\t')}
+			],
 
-					const params = route.params.length === 0
-						? '{}'
-						: `{ ${route.params.map((part, i) => `${part}: match[${i + 1}]`).join(', ')} }`;
+			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';
 
-					return `{ id: '${route.id}', type: '${route.type}', pattern: ${route.pattern}, params: ${route.params.length > 0 ? `match` : `()`} => (${params}), module: ${route.id} }`;
-				})
-				.join(',\n\t')
-			}
-		];`.replace(/^\t\t/gm, '').trim();
+							const props = [
+								`name: "${part.component.name}"`,
+								`file: ${stringify(part.component.file)}`,
+								`component: component_${component_lookup[part.component.name]}`,
+								part.component.has_preload && `preload: preload_${component_lookup[part.component.name]}`
+							].filter(Boolean);
 
-	return code;
-}
+							if (part.params.length > 0) {
+								const params = part.params.map((param, i) => `${param}: d(match[${i + 1}])`);
+								props.push(`params: match => ({ ${params.join(', ')} })`);
+							}
+
+							return `{ ${props.join(', ')} }`;
+						}).join(',\n\t\t\t\t\t\t')}
+					]
+				}`).join(',\n\n\t\t\t\t')}
+			],
+
+			root,
+			root_preload${manifest_data.root.has_preload ? '' : `: () => {}`},
+			error
+		};
+
+		export const build_dir = ${JSON.stringify(build_dir)};
+
+		export const src_dir = ${JSON.stringify(src_dir)};
+
+		export const dev = ${dev ? 'true' : 'false'};
+	`.replace(/^\t{2}/gm, '').trim();
+
+	return `// This file is generated by Sapper — do not edit it!\n` + template
+		.replace('__BUILD__DIR__', JSON.stringify(build_dir))
+		.replace('__SRC__DIR__', JSON.stringify(src_dir))
+		.replace('__DEV__', dev ? 'true' : 'false')
+		.replace(/const manifest = __MANIFEST__;/, code);
+}
+
+function get_file(path_to_routes: string, component: PageComponent) {
+	if (component.default) return `./layout.html`;
+	return posixify(`${path_to_routes}/${component.file}`);
+}

src/core/create_routes.ts

@@ -1,129 +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(), nodir: true }) }) {
-	const routes: Route[] = files
-		.map((file: string) => {
-			if (/(^|\/|\\)_/.test(file)) return;
-
-			if (/]\[/.test(file)) {
-				throw new Error(`Invalid route ${file} — parameters must be separated`);
-			}
-
-			const base = file.replace(/\.[^/.]+$/, '');
-			const parts = base.split('/'); // glob output is always posix-style
-			if (parts[parts.length - 1] === 'index') parts.pop();
-
-			const id = (
-				parts.join('_').replace(/[[\]]/g, '$').replace(/^\d/, '_$&').replace(/[^a-zA-Z0-9_$]/g, '_')
-			 ) || '_';
-
-			const params: string[] = [];
-			const param_pattern = /\[([^\]]+)\]/g;
-			let match;
-			while (match = param_pattern.exec(base)) {
-				params.push(match[1]);
-			}
-
-			// 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 = encodeURIComponent(parts[i].normalize()).replace(/%5B/g, '[').replace(/%5D/g, ']');
-				const dynamic = ~part.indexOf('[');
-
-				if (dynamic) {
-					const matcher = part.replace(param_pattern, `([^\/]+?)`);
-					pattern_string = nested ? `(?:\\/${matcher}${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,
-				type: path.extname(file) === '.html' ? 'page' : 'route',
-				file,
-				pattern,
-				test,
-				exec,
-				parts,
-				params
-			};
-		})
-		.filter(Boolean)
-		.sort((a: Route, b: Route) => {
-			if (a.file === '4xx.html' || a.file === '5xx.html') return -1;
-			if (b.file === '4xx.html' || b.file === '5xx.html') return 1;
-
-			const max = Math.max(a.parts.length, b.parts.length);
-
-			for (let i = 0; i < max; i += 1) {
-				const a_part = a.parts[i];
-				const b_part = b.parts[i];
-
-				if (!a_part) return -1;
-				if (!b_part) return 1;
-
-				const a_sub_parts = get_sub_parts(a_part);
-				const b_sub_parts = get_sub_parts(b_part);
-				const max = Math.max(a_sub_parts.length, b_sub_parts.length);
-
-				for (let i = 0; i < max; i += 1) {
-					const a_sub_part = a_sub_parts[i];
-					const b_sub_part = b_sub_parts[i];
-
-					if (!a_sub_part) return 1; // b is more specific, so goes first
-					if (!b_sub_part) return -1;
-
-					if (a_sub_part.dynamic !== b_sub_part.dynamic) {
-						return a_sub_part.dynamic ? 1 : -1;
-					}
-
-					if (!a_sub_part.dynamic && a_sub_part.content !== b_sub_part.content) {
-						return (
-							(b_sub_part.content.length - a_sub_part.content.length) ||
-							(a_sub_part.content < b_sub_part.content ? -1 : 1)
-						);
-					}
-				}
-			}
-
-			throw new Error(`The ${a.file} and ${b.file} routes clash`);
-		});
-
-	return routes;
-}
-
-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 +1,16 @@
+import * as fs from 'fs';
+
+export default function read_template(dir: string) {
+	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

@@ -1,25 +0,0 @@
-import * as sander from 'sander';
-
-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);
-		fudge_mtime(file);
-	}
-}
-
-export function posixify(file: string) {
-	return file.replace(/[/\\]/g, '/');
-}
-
-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(
-		file,
-		new Date(atime.getTime() - 999999),
-		new Date(mtime.getTime() - 999999)
-	);
-}

src/interfaces.ts

@@ -1,7 +1,12 @@
+import * as child_process from 'child_process';
+import { CompileResult } from './core/create_compilers/interfaces';
+
 export type Route = {
 	id: string;
-	type: 'page' | 'route';
-	file: string;
+	handlers: {
+		type: 'page' | 'route';
+		file: string;
+	}[];
 	pattern: RegExp;
 	test: (url: string) => boolean;
 	exec: (url: string) => Record<string, string>;
@@ -14,6 +19,85 @@ export type Template = {
 	stream: (req, res, data: Record<string, string | Promise<string>>) => void;
 };
 
-export type Store = {
-	get: () => any;
-};
+export type WritableStore<T> = {
+	set: (value: T) => void;
+	update: (fn: (value: T) => T) => void;
+	subscribe: (fn: (T: any) => void) => () => void;
+};
+
+export type PageComponent = {
+	default?: boolean;
+	name: string;
+	file: string;
+	has_preload: boolean;
+};
+
+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
+};
+
+export type ManifestData = {
+	root: PageComponent;
+	components: PageComponent[];
+	pages: Page[];
+	server_routes: ServerRoute[];
+};
+
+export type ReadyEvent = {
+	port: number;
+	process: child_process.ChildProcess;
+};
+
+export type ErrorEvent = {
+	type: string;
+	message: string;
+};
+
+export type FatalEvent = {
+	message: string;
+};
+
+export type InvalidEvent = {
+	changed: string[];
+	invalid: {
+		client: boolean;
+		server: boolean;
+		serviceworker: boolean;
+	}
+};
+
+export type BuildEvent = {
+	type: string;
+	errors: Array<{ file: string, message: string, duplicate: boolean }>;
+	warnings: Array<{ file: string, message: string, duplicate: boolean }>;
+	duration: number;
+	result: CompileResult;
+};
+
+export type FileEvent = {
+	file: string;
+	size: number;
+};
+
+export type FailureEvent = {
+
+};
+
+export type DoneEvent = {};

src/middleware.ts

@@ -1,418 +0,0 @@
-import * as fs from 'fs';
-import * as path from 'path';
-import { resolve, URL } from 'url';
-import { ClientRequest, ServerResponse } from 'http';
-import cookie from 'cookie';
-import mkdirp from 'mkdirp';
-import rimraf from 'rimraf';
-import devalue from 'devalue';
-import fetch from 'node-fetch';
-import { lookup } from './middleware/mime';
-import { create_routes, create_compilers } from './core';
-import { locations, dev } from './config';
-import { Route, Template } from './interfaces';
-import sourceMapSupport from 'source-map-support';
-
-sourceMapSupport.install();
-
-type RouteObject = {
-	id: string;
-	type: 'page' | 'route';
-	pattern: RegExp;
-	params: (match: RegExpMatchArray) => Record<string, string>;
-	module: {
-		render: (data: any, opts: { store: Store }) => {
-			head: string;
-			css: { code: string, map: any };
-			html: string
-		},
-		preload: (data: any) => any | Promise<any>
-	};
-	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>;
-}
-
-export default function middleware({ routes, store }: {
-	routes: RouteObject[],
-	store: (req: Req) => Store
-}) {
-	const output = locations.dest();
-
-	const client_info = JSON.parse(fs.readFileSync(path.join(output, 'client_info.json'), 'utf-8'));
-
-	const middleware = compose_handlers([
-		(req: Req, res: ServerResponse, next: () => void) => {
-			if (req.baseUrl === undefined) {
-				req.baseUrl = req.originalUrl
-					? req.originalUrl.slice(0, -req.url.length)
-					: '';
-			}
-
-			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_route_handler(client_info.assetsByChunkName, 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();
-		}
-	};
-}
-
-const resolved = Promise.resolve();
-
-function get_route_handler(chunks: Record<string, string>, routes: RouteObject[], store_getter: (req: Req) => Store) {
-	const template = dev()
-		? () => fs.readFileSync(`${locations.app()}/template.html`, 'utf-8')
-		: (str => () => str)(fs.readFileSync(`${locations.dest()}/template.html`, 'utf-8'));
-
-	function handle_route(route: RouteObject, req: Req, res: ServerResponse) {
-		req.params = route.params(route.pattern.exec(req.path));
-
-		const mod = route.module;
-
-		if (route.type === 'page') {
-			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])
-				.filter(file => !file.match(/\.map$/))
-				.map(file => `<${req.baseUrl}/client/${file}>;rel="preload";as="script"`)
-				.join(', ');
-
-			res.setHeader('Link', link);
-
-			const store = store_getter ? store_getter(req) : null;
-			const data = { params: req.params, query: req.query };
-
-			let redirect: { statusCode: number, location: string };
-			let error: { statusCode: number, message: Error | string };
-
-			Promise.resolve(
-				mod.preload ? mod.preload.call({
-					redirect: (statusCode: number, location: string) => {
-						redirect = { statusCode, location };
-					},
-					error: (statusCode: number, message: Error | string) => {
-						error = { statusCode, message };
-					},
-					fetch: (url: string, opts?: any) => {
-						const parsed = new URL(url, `http://127.0.0.1:${process.env.PORT}${req.baseUrl ? req.baseUrl + '/'  :''}`);
-
-						if (opts) {
-							opts = Object.assign({}, opts);
-
-							const include_cookies = (
-								opts.credentials === 'include' ||
-								opts.credentials === 'same-origin' && parsed.origin === `http://127.0.0.1:${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 => {
-				error = { statusCode: 500, message: err };
-			}).then(preloaded => {
-				if (redirect) {
-					res.statusCode = redirect.statusCode;
-					res.setHeader('Location', `${req.baseUrl}/${redirect.location}`);
-					res.end();
-
-					return;
-				}
-
-				if (error) {
-					handle_error(req, res, error.statusCode, error.message);
-					return;
-				}
-
-				const serialized = {
-					preloaded: mod.preload && try_serialize(preloaded),
-					store: store && try_serialize(store.get())
-				};
-				Object.assign(data, preloaded);
-
-				const { html, head, css } = mod.render(data, {
-					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: ${serialized.store}`
-				].filter(Boolean).join(',')}}`
-
-				const has_service_worker = fs.existsSync(path.join(locations.dest(), 'service-worker.js'));
-				if (has_service_worker) {
-					`if ('serviceWorker' in navigator) navigator.serviceWorker.register('${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.end(page);
-
-				if (process.send) {
-					process.send({
-						__sapper__: true,
-						url: req.url,
-						method: req.method,
-						status: 200,
-						type: 'text/html',
-						body: page
-					});
-				}
-			});
-		}
-
-		else {
-			const method = req.method.toLowerCase();
-			// 'delete' cannot be exported from a module because it is a keyword,
-			// so check for 'del' instead
-			const method_export = method === 'delete' ? 'del' : method;
-			const handler = mod[method_export];
-			if (handler) {
-				if (process.env.SAPPER_EXPORT) {
-					const { write, end, setHeader } = res;
-					const chunks: any[] = [];
-					const headers: Record<string, string> = {};
-
-					// 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,
-							url: req.url,
-							method: req.method,
-							status: res.statusCode,
-							type: headers['content-type'],
-							body: Buffer.concat(chunks).toString()
-						});
-					};
-				}
-
-				const handle_bad_result = (err?: Error) => {
-					if (err) {
-						console.error(err.stack);
-						res.statusCode = 500;
-						res.end(err.message);
-					} else {
-						handle_error(req, res, 404, 'Not found');
-					}
-				};
-
-				try {
-					handler(req, res, handle_bad_result);
-				} catch (err) {
-					handle_bad_result(err);
-				}
-			} else {
-				// no matching handler for method — 404
-				handle_error(req, res, 404, 'Not found');
-			}
-		}
-	}
-
-	const not_found_route = routes.find((route: RouteObject) => route.error === '4xx');
-	const error_route = routes.find((route: RouteObject) => route.error === '5xx');
-
-	function handle_error(req: Req, res: ServerResponse, statusCode: number, message: Error | string) {
-		res.statusCode = statusCode;
-		res.setHeader('Content-Type', 'text/html');
-
-		const error = message instanceof Error ? message : new Error(message);
-
-		const not_found = statusCode >= 400 && statusCode < 500;
-
-		const route = not_found
-			? not_found_route
-			: error_route;
-
-		const title: string = not_found
-			? 'Not found'
-			: `Internal server error: ${error.message}`;
-
-		const rendered = route ? route.module.render({
-			status: statusCode,
-			error
-		}, {
-			store: store_getter && store_getter(req)
-		}) : { head: '', css: null, html: title };
-
-		const { head, css, html } = rendered;
-
-		const page = template()
-			.replace('%sapper.base%', `<base href="${req.baseUrl}/">`)
-			.replace('%sapper.scripts%', `<script>__SAPPER__={baseUrl: "${req.baseUrl}"}</script><script src='${req.baseUrl}/client/${chunks.main}'></script>`)
-			.replace('%sapper.html%', html)
-			.replace('%sapper.head%', `<noscript id='sapper-head-start'></noscript>${head}<noscript id='sapper-head-end'></noscript>`)
-			.replace('%sapper.styles%', (css && css.code ? `<style>${css.code}</style>` : ''));
-
-		res.end(page);
-	}
-
-	return function find_route(req: Req, res: ServerResponse) {
-		try {
-			for (const route of routes) {
-				if (!route.error && route.pattern.test(req.path)) return handle_route(route, req, res);
-			}
-
-			handle_error(req, res, 404, 'Not found');
-		} catch (error) {
-			handle_error(req, res, 500, error);
-		}
-	};
-}
-
-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 read_json(file: string) {
-	return JSON.parse(fs.readFileSync(file, 'utf-8'));
-}
-
-function try_serialize(data: any) {
-	try {
-		return devalue(data);
-	} catch (err) {
-		return null;
-	}
-}

src/runtime/index.ts

@@ -1,301 +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 component: Component;
-let target: Node;
-let store: Store;
-let routes: Route[];
-let errors: { '4xx': Route, '5xx': 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 pathname = url.pathname.slice(manifest.baseUrl.length);
-
-	for (const route of routes) {
-		const match = route.pattern.exec(pathname);
-		if (match) {
-			if (route.ignore) return null;
-
-			const params = route.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, data: { params, query } };
-		}
-	}
-}
-
-let current_token: {};
-
-function render(Component: ComponentConstructor, data: any, scroll: ScrollPosition, token: {}) {
-	if (current_token !== token) return;
-
-	if (component) {
-		component.destroy();
-	} 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 Component({
-		target,
-		data,
-		store,
-		hydrate: !component
-	});
-
-	if (scroll) {
-		window.scrollTo(scroll.x, scroll.y);
-	}
-}
-
-function prepare_route(Component: ComponentConstructor, data: RouteData) {
-	let redirect: { statusCode: number, location: string } = null;
-	let error: { statusCode: number, message: Error | string } = null;
-
-	if (!Component.preload) {
-		return { Component, data, redirect, error };
-	}
-
-	if (!component && manifest.preloaded) {
-		return { Component, data: Object.assign(data, manifest.preloaded), redirect, error };
-	}
-
-	return Promise.resolve(Component.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 };
-		}
-	}, data)).catch(err => {
-		error = { statusCode: 500, message: err };
-	}).then(preloaded => {
-		if (error) {
-			const route = error.statusCode >= 400 && error.statusCode < 500
-				? errors['4xx']
-				: errors['5xx'];
-
-			return route.load().then(({ default: Component }: { default: ComponentConstructor }) => {
-				const err = error.message instanceof Error ? error.message : new Error(error.message);
-				Object.assign(data, { status: error.statusCode, error: err });
-				return { Component, data, redirect: null };
-			});
-		}
-
-		Object.assign(data, preloaded)
-		return { Component, data, redirect };
-	});
-}
-
-function navigate(target: Target, id: number) {
-	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.data));
-
-	prefetching = null;
-
-	const token = current_token = {};
-
-	return loaded.then(({ Component, data, redirect }) => {
-		if (redirect) {
-			return goto(redirect.location, { replaceState: true });
-		}
-
-		render(Component, data, scroll_history[id], token);
-	});
-}
-
-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);
-		navigate(target, event.state.id);
-	} else {
-		// hashchange
-		cid = ++uid;
-		history.replaceState({ id: cid }, '', window.location.href);
-	}
-}
-
-let prefetching: {
-	href: string;
-	promise: Promise<{ Component: ComponentConstructor, data: any }>;
-} = null;
-
-export function prefetch(href: string) {
-	const selected = select_route(new URL(href, document.baseURI));
-
-	if (selected) {
-		prefetching = {
-			href,
-			promise: selected.route.load().then(mod => prepare_route(mod.default, selected.data))
-		};
-	}
-}
-
-function handle_touchstart_mouseover(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(_target: Node, _routes: Route[], opts?: { store?: (data: any) => Store }) {
-	target = _target;
-	routes = _routes.filter(r => !r.error);
-	errors = {
-		'4xx': _routes.find(r => r.error === '4xx'),
-		'5xx': _routes.find(r => r.error === '5xx')
-	};
-
-	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', handle_touchstart_mouseover);
-		window.addEventListener('mouseover', handle_touchstart_mouseover);
-
-		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));
-		return navigate(target, uid);
-	});
-}
-
-export function goto(href: string, opts = { replaceState: false }) {
-	const target = select_route(new URL(href, document.baseURI));
-
-	if (target) {
-		navigate(target, null);
-		if (history) history[opts.replaceState ? 'replaceState' : 'pushState']({ id: cid }, '', href);
-	} else {
-		window.location.href = href;
-	}
-}
-
-export function prefetchRoutes(pathnames: string[]) {
-	if (!routes) throw new Error(`You must call init() first`);
-
-	return routes
-		.filter(route => {
-			if (!pathnames) return true;
-			return pathnames.some(pathname => {
-				return route.error
-					? route.error === 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 };
-
-export interface ComponentConstructor {
-	new (options: { target: Node, data: any, store: Store, hydrate: boolean }): Component;
-	preload: (data: { params: Params, query: Query }) => Promise<any>;
-};
-
-export interface Component {
-	destroy: () => void;
-}
-
-export type Route = {
-	pattern: RegExp;
-	load: () => Promise<{ default: ComponentConstructor }>;
-	error?: string;
-	params?: (match: RegExpExecArray) => Record<string, string>;
-	ignore?: boolean;
-};
-
-export type ScrollPosition = {
-	x: number;
-	y: number;
-};
-
-export type Target = {
-	url: URL;
-	route: Route;
-	data: 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/types.d.ts

@@ -0,0 +1 @@
+declare module 'svelte/compiler';

src/utils.ts

@@ -0,0 +1,119 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+export function left_pad(str: string, len: number) {
+	while (str.length < len) str = ` ${str}`;
+	return str;
+}
+
+export function repeat(str: string, i: number) {
+	let result = '';
+	while (i--) result += str;
+	return result;
+}
+
+export function format_milliseconds(ms: number) {
+	if (ms < 1000) return `${ms}ms`;
+	if (ms < 60000) return `${(ms / 1000).toFixed(1)}s`;
+
+	const minutes = ~~(ms / 60000);
+	const seconds = Math.round((ms % 60000) / 1000);
+	return `${minutes}m${seconds < 10 ? '0' : ''}${seconds}s`;
+}
+
+export function elapsed(start: number) {
+	return format_milliseconds(Date.now() - start);
+}
+
+export function walk(cwd: string, dir = cwd, files: string[] = []) {
+	fs.readdirSync(dir).forEach(file => {
+		const resolved = path.resolve(dir, file);
+		if (fs.statSync(resolved).isDirectory()) {
+			walk(cwd, resolved, files);
+		} else {
+			files.push(posixify(path.relative(cwd, resolved)));
+		}
+	});
+
+	return files;
+}
+
+export function posixify(str: string) {
+	return str.replace(/\\/g, '/');
+}
+
+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);
+		fs.writeFileSync(file, code);
+		fudge_mtime(file);
+	}
+}
+
+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 } = 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',
+]);

test/app/.gitignore

@@ -1,7 +0,0 @@
-.DS_Store
-node_modules
-.sapper
-yarn.lock
-cypress/screenshots
-templates/.*
-dist

test/app/README.md

@@ -1,81 +0,0 @@
-# sapper-template
-
-The default [Sapper](https://github.com/sveltejs/sapper) template. To clone it and get started:
-
-```bash
-npx degit sveltejs/sapper-template my-app
-cd my-app
-npm install # or yarn!
-npm run dev
-```
-
-Open up [localhost:3000](http://localhost:3000) and start clicking around.
-
-
-## Structure
-
-Sapper expects to find three directories in the root of your project — `assets`, `routes` and `templates`.
-
-
-### assets
-
-The [assets](assets) directory contains any static assets that should be available. These are served using [serve-static](https://github.com/expressjs/serve-static).
-
-In your [service-worker.js](templates/service-worker.js) file, Sapper makes these files available as `__assets__` so that you can cache them (though you can choose not to, for example if you don't want to cache very large files).
-
-
-### routes
-
-This is the heart of your Sapper app. There are two kinds of routes — *pages*, and *server routes*.
-
-**Pages** are Svelte components written in `.html` files. When a user first visits the application, they will be served a server-rendered version of the route in question, plus some JavaScript that 'hydrates' the page and initialises a client-side router. From that point forward, navigating to other pages is handled entirely on the client for a fast, app-like feel. (Sapper will preload and cache the code for these subsequent pages, so that navigation is instantaneous.)
-
-**Server routes** are modules written in `.js` files, that export functions corresponding to HTTP methods. Each function receives Express `request` and `response` objects as arguments, plus a `next` function. This is useful for creating a JSON API, for example.
-
-There are three simple rules for naming the files that define your routes:
-
-* A file called `routes/about.html` corresponds to the `/about` route. A file called `routes/blog/[slug].html` corresponds to the `/blog/:slug` route, in which case `params.slug` is available to the route
-* The file `routes/index.html` (or `routes/index.js`) corresponds to the root of your app. `routes/about/index.html` is treated the same as `routes/about.html`.
-* Files and directories with a leading underscore do *not* create routes. This allows you to colocate helper modules and components with the routes that depend on them — for example you could have a file called `routes/_helpers/datetime.js` and it would *not* create a `/_helpers/datetime` route
-
-
-### templates
-
-This directory should contain the following files at a minimum:
-
-* [2xx.html](templates/2xx.html) — a template for the page to serve for valid requests
-* [4xx.html](templates/4xx.html) — a template for 4xx-range errors (such as 404 Not Found)
-* [5xx.html](templates/5xx.html) — a template for 5xx-range errors (such as 500 Internal Server Error)
-* [main.js](templates/main.js) — this module initialises Sapper
-* [service-worker.js](templates/service-worker.js) — your app's service worker
-
-Inside the HTML templates, Sapper will inject various values as indicated by `%sapper.xxxx%` tags. Inside JavaScript files, Sapper will replace strings like `__dev__` with the appropriate value.
-
-In lieu of documentation (bear with us), consult the files to see what variables are available and how they're used.
-
-
-## Webpack config
-
-Sapper uses webpack to provide code-splitting, dynamic imports and hot module reloading, as well as compiling your Svelte components. As long as you don't do anything daft, you can edit the configuration files to add whatever loaders and plugins you'd like.
-
-
-## Production mode and deployment
-
-To start a production version of your app, run `npm start`. This will disable hot module replacement, and activate the appropriate webpack plugins.
-
-You can deploy your application to any environment that supports Node 8 or above. As an example, to deploy to [Now](https://zeit.co/now), run these commands:
-
-```bash
-npm install -g now
-now
-```
-
-
-## Bugs and feedback
-
-Sapper is in early development, and may have the odd rough edge here and there. Please be vocal over on the [Sapper issue tracker](https://github.com/sveltejs/sapper/issues).
-
-
-## License
-
-[LIL](LICENSE)

test/app/app/client.js

@@ -1,11 +0,0 @@
-import { init, prefetchRoutes } from '../../../runtime.js';
-import { Store } from 'svelte/store.js';
-import { routes } from './manifest/client.js';
-
-window.init = () => {
-	return init(document.querySelector('#sapper'), routes, {
-		store: data => new Store(data)
-	});
-};
-
-window.prefetchRoutes = prefetchRoutes;

test/app/app/server.js

@@ -1,104 +0,0 @@
-import fs from 'fs';
-import { resolve } from 'url';
-import express from 'express';
-import serve from 'serve-static';
-import sapper from '../../../dist/middleware.ts.js';
-import { Store } from 'svelte/store.js';
-import { routes } from './manifest/server.js';
-
-let pending;
-let ended;
-
-process.on('message', message => {
-	if (message.action === 'start') {
-		if (pending) {
-			throw new Error(`Already capturing`);
-		}
-
-		pending = new Set();
-		ended = false;
-		process.send({ type: 'ready' });
-	}
-
-	if (message.action === 'end') {
-		ended = true;
-		if (pending.size === 0) {
-			process.send({ type: 'done' });
-			pending = null;
-		}
-	}
-});
-
-const app = express();
-
-const { PORT = 3000, BASEPATH = '' } = process.env;
-const base = `http://localhost:${PORT}${BASEPATH}/`;
-
-// this allows us to do e.g. `fetch('/api/blog')` on the server
-const fetch = require('node-fetch');
-global.fetch = (url, opts) => {
-	return fetch(resolve(base, url), opts);
-};
-
-const middlewares = [
-	serve('assets'),
-
-	// set test cookie
-	(req, res, next) => {
-		res.setHeader('Set-Cookie', 'test=woohoo!; Max-Age=3600');
-		next();
-	},
-
-	// emit messages so we can capture requests
-	(req, res, next) => {
-		if (!pending) return next();
-
-		pending.add(req.url);
-
-		const { write, end } = res;
-		const chunks = [];
-
-		res.write = function(chunk) {
-			chunks.push(new Buffer(chunk));
-			write.apply(res, arguments);
-		};
-
-		res.end = function(chunk) {
-			if (chunk) chunks.push(new Buffer(chunk));
-			end.apply(res, arguments);
-
-			if (pending) pending.delete(req.url);
-
-			process.send({
-				method: req.method,
-				url: req.url,
-				status: res.statusCode,
-				headers: res._headers,
-				body: Buffer.concat(chunks).toString()
-			});
-
-			if (pending && pending.size === 0 && ended) {
-				process.send({ type: 'done' });
-			}
-		};
-
-		next();
-	},
-
-	sapper({
-		routes,
-		store: () => {
-			return new Store({
-				title: 'Stored title'
-			});
-		}
-	})
-];
-
-if (BASEPATH) {
-	app.use(BASEPATH, ...middlewares);
-} else {
-	app.use(...middlewares);
-}
-
-app.listen(PORT);

test/app/app/template.html

@@ -1,33 +0,0 @@
-<!doctype html>
-<html lang='en'>
-<head>
-	<meta charset='utf-8'>
-	<meta name='viewport' content='width=device-width'>
-	<meta name='theme-color' content='#aa1e1e'>
-
-	%sapper.base%
-
-	<link rel='stylesheet' href='global.css'>
-	<link rel='manifest' href='manifest.json'>
-	<link rel='icon' type='image/png' href='favicon.png'>
-
-	<!-- Sapper generates a <style> tag containing critical CSS
-	     for the current page. CSS for the rest of the app is
-	     lazily loaded when it precaches secondary pages -->
-	%sapper.styles%
-
-	<!-- This contains the contents of the <:Head> component, if
-	     the current page has one -->
-	%sapper.head%
-</head>
-<body>
-	<!-- The application will be rendered inside this element,
-	     because `templates/main.js` references it -->
-	<div id='sapper'>%sapper.html%</div>
-
-	<!-- Sapper creates a <script> tag containing `templates/main.js`
-	     and anything else it needs to hydrate the app and
-	     initialise the router -->
-	%sapper.scripts%
-</body>
-</html>

test/app/assets/global.css

@@ -1,45 +0,0 @@
-body {
-	margin: 0;
-	font-family: Roboto, -apple-system, BlinkMacSystemFont, Segoe UI, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
-	font-size: 14px;
-	line-height: 1.5;
-	color: #333;
-}
-
-main {
-	position: relative;
-	max-width: 56em;
-	background-color: white;
-	padding: 2em;
-	margin: 0 auto;
-	box-sizing: border-box;
-}
-
-h1, h2, h3, h4, h5, h6 {
-	margin: 0 0 0.5em 0;
-	font-weight: 400;
-	line-height: 1.2;
-}
-
-h1 {
-	font-size: 2em;
-}
-
-a {
-	color: inherit;
-}
-
-code {
-	font-family: menlo, inconsolata, monospace;
-	font-size: calc(1em - 2px);
-	color: #555;
-	background-color: #f0f0f0;
-	padding: 0.2em 0.4em;
-	border-radius: 2px;
-}
-
-@media (min-width: 400px) {
-	body {
-		font-size: 16px;
-	}
-}

test/app/assets/manifest.json

@@ -1,20 +0,0 @@
-{
-	"background_color": "#ffffff",
-	"theme_color": "#aa1e1e",
-	"name": "TODO",
-	"short_name": "TODO",
-	"display": "minimal-ui",
-	"start_url": "/",
-	"icons": [
-		{
-			"src": "svelte-logo-192.png",
-			"sizes": "192x192",
-			"type": "image/png"
-		},
-		{
-			"src": "svelte-logo-512.png",
-			"sizes": "512x512",
-			"type": "image/png"
-		}
-	]
-}

test/app/routes/4xx.html

@@ -1,6 +0,0 @@
-<:Head>
-	<title>{{status}}</title>
-</:Head>
-
-<h1>Not found</h1>
-<p>{{error.message}}</p>

test/app/routes/5xx.html

@@ -1,6 +0,0 @@
-<:Head>
-	<title>Internal server error</title>
-</:Head>
-
-<h1>Internal server error</h1>
-<p>{{error.message}}</p>

test/app/routes/about.html

@@ -1,21 +0,0 @@
-<:Head>
-	<title>About</title>
-</:Head>
-
-<h1>About this site</h1>
-
-<p>This is the 'about' page. There's not much here.</p>
-
-<button class='goto' on:click='goto("blog/what-is-sapper")'>What is Sapper?</button>
-<button class='prefetch' on:click='prefetch("blog/why-the-name")'>Why the name?</button>
-
-<script>
-	import { goto, prefetch } from '../../../runtime.js';
-
-	export default {
-		methods: {
-			goto,
-			prefetch
-		}
-	};
-</script>

test/app/routes/blog.json.js

@@ -1,17 +0,0 @@
-import posts from './blog/_posts.js';
-
-const contents = JSON.stringify(posts.map(post => {
-	return {
-		title: post.title,
-		slug: post.slug
-	};
-}));
-
-export function get(req, res) {
-	res.writeHead(200, {
-		'Content-Type': 'application/json',
-		'Cache-Control': `max-age=${30 * 60 * 1e3}` // cache for 30 minutes
-	});
-
-	res.end(contents);
-}

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

@@ -1,36 +0,0 @@
-<:Head>
-	<title>{{post.title}}</title>
-</:Head>
-
-<h1>{{post.title}}</h1>
-
-<div class='content'>
-	{{{post.html}}}
-</div>
-
-<script>
-	export default {
-		preload({ params, query }) {
-			// the `slug` parameter is available because this file
-			// is called [slug].html
-			const { slug } = params;
-
-			if (slug === 'throw-an-error') {
-				return this.error(500, 'something went wrong');
-			}
-
-			return fetch(`blog/${slug}.json`).then(r => {
-				if (r.status === 200) {
-					return r.json().then(post => ({ post }));
-					this.error(r.status, '')
-				}
-
-				if (r.status === 404) {
-					this.error(404, 'Not found');
-				} else {
-					throw new Error('Something went wrong');
-				}
-			});
-		}
-	};
-</script>

test/app/routes/blog/[slug].json.js

@@ -1,23 +0,0 @@
-import posts from './_posts.js';
-
-const lookup = {};
-posts.forEach(post => {
-	lookup[post.slug] = JSON.stringify(post);
-});
-
-export function get(req, res, next) {
-	// the `slug` parameter is available because this file
-	// is called [slug].js
-	const { slug } = req.params;
-
-	if (slug in lookup) {
-		res.writeHead(200, {
-			'Content-Type': 'application/json',
-			'Cache-Control': `no-cache`
-		});
-
-		res.end(lookup[slug]);
-	} else {
-		next();
-	}
-}

test/app/routes/blog/_posts.js

@@ -1,116 +0,0 @@
-// Ordinarily, you'd generate this data from markdown files in your
-// repo, or fetch them from a database of some kind. But in order to
-// avoid unnecessary dependencies in the starter template, and in the
-// service of obviousness, we're just going to leave it here.
-
-// This file is called `_posts.js` rather than `posts.js`, because
-// we don't want to create an `/api/blog/posts` route — the leading
-// underscore tells Sapper not to do that.
-
-const posts = [
-	{
-		title: 'What is Sapper?',
-		slug: 'what-is-sapper',
-		html: `
-			<p>First, you have to know what <a href='https://svelte.technology'>Svelte</a> is. Svelte is a UI framework with a bold new idea: rather than providing a library that you write code with (like React or Vue, for example), it's a compiler that turns your components into highly optimized vanilla JavaScript. If you haven't already read the <a href='https://svelte.technology/blog/frameworks-without-the-framework'>introductory blog post</a>, you should!</p>
-
-			<p>Sapper is a Next.js-style framework (<a href='blog/how-is-sapper-different-from-next'>more on that here</a>) built around Svelte. It makes it embarrassingly easy to create extremely high performance web apps. Out of the box, you get:</p>
-
-			<ul>
-				<li>Code-splitting, dynamic imports and hot module replacement, powered by webpack</li>
-				<li>Server-side rendering (SSR) with client-side hydration</li>
-				<li>Service worker for offline support, and all the PWA bells and whistles</li>
-				<li>The nicest development experience you've ever had, or your money back</li>
-			</ul>
-
-			<p>It's implemented as Express middleware. Everything is set up and waiting for you to get started, but you keep complete control over the server, service worker, webpack config and everything else, so it's as flexible as you need it to be.</p>
-		`
-	},
-
-	{
-		title: 'How to use Sapper',
-		slug: 'how-to-use-sapper',
-		html: `
-			<h2>Step one</h2>
-			<p>Create a new project, using <a href='https://github.com/Rich-Harris/degit'>degit</a>:</p>
-
-			<pre><code>npx degit sveltejs/sapper-template my-app
-			cd my-app
-			npm install # or yarn!
-			npm run dev
-			</code></pre>
-
-			<h2>Step two</h2>
-			<p>Go to <a href='http://localhost:3000'>localhost:3000</a>. Open <code>my-app</code> in your editor. Edit the files in the <code>routes</code> directory or add new ones.</p>
-
-			<h2>Step three</h2>
-			<p>...</p>
-
-			<h2>Step four</h2>
-			<p>Resist overdone joke formats.</p>
-		`
-	},
-
-	{
-		title: 'Why the name?',
-		slug: 'why-the-name',
-		html: `
-			<p>In war, the soldiers who build bridges, repair roads, clear minefields and conduct demolitions — all under combat conditions — are known as <em>sappers</em>.</p>
-
-			<p>For web developers, the stakes are generally lower than those for combat engineers. But we face our own hostile environment: underpowered devices, poor network connections, and the complexity inherent in front-end engineering. Sapper, which is short for <strong>S</strong>velte <strong>app</strong> mak<strong>er</strong>, is your courageous and dutiful ally.</p>
-		`
-	},
-
-	{
-		title: 'How is Sapper different from Next.js?',
-		slug: 'how-is-sapper-different-from-next',
-		html: `
-			<p><a href='https://github.com/zeit/next.js/'>Next.js</a> is a React framework from <a href='https://zeit.co'>Zeit</a>, and is the inspiration for Sapper. There are a few notable differences, however:</p>
-
-			<ul>
-				<li>It's powered by <a href='https://svelte.technology'>Svelte</a> instead of React, so it's faster and your apps are smaller</li>
-				<li>Instead of route masking, we encode route parameters in filenames. For example, the page you're looking at right now is <code>routes/blog/[slug].html</code></li>
-				<li>As well as pages (Svelte components, which render on server or client), you can create <em>server routes</em> in your <code>routes</code> directory. These are just <code>.js</code> files that export functions corresponding to HTTP methods, and receive Express <code>request</code> and <code>response</code> objects as arguments. This makes it very easy to, for example, add a JSON API such as the one <a href='blog/how-is-sapper-different-from-next.json'>powering this very page</a></li>
-				<li>Links are just <code>&lt;a&gt;</code> elements, rather than framework-specific <code>&lt;Link&gt;</code> components. That means, for example, that <a href='blog/how-can-i-get-involved'>this link right here</a>, despite being inside a blob of HTML, works with the router as you'd expect.</li>
-			</ul>
-		`
-	},
-
-	{
-		title: 'How can I get involved?',
-		slug: 'how-can-i-get-involved',
-		html: `
-			<p>We're so glad you asked! Come on over to the <a href='https://github.com/sveltejs/svelte'>Svelte</a> and <a href='https://github.com/sveltejs/sapper'>Sapper</a> repos, and join us in the <a href='https://gitter.im/sveltejs/svelte'>Gitter chatroom</a>. Everyone is welcome, especially you!</p>
-		`
-	},
-
-	{
-		title: 'A very long post with deep links',
-		slug: 'a-very-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>
-		`
-	}
-];
-
-posts.forEach(post => {
-	post.html = post.html.replace(/^\t{3}/gm, '');
-});
-
-export default posts;

test/app/routes/blog/index.html

@@ -1,25 +0,0 @@
-<:Head>
-	<title>Blog</title>
-</:Head>
-
-<h1>Recent posts</h1>
-
-<ul>
-	{{#each posts as post}}
-		<!-- we're using the non-standard `rel=prefetch` attribute to
-				tell Sapper to load the data for the page as soon as
-				the user hovers over the link or taps it, instead of
-				waiting for the 'click' event -->
-		<li><a rel='prefetch' href='blog/{{post.slug}}'>{{post.title}}</a></li>
-	{{/each}}
-</ul>
-
-<script>
-	export default {
-		preload({ params, query }) {
-			return fetch(`blog.json`).then(r => r.json()).then(posts => {
-				return { posts };
-			});
-		}
-	};
-</script>

test/app/routes/credentials/index.html

@@ -1,11 +0,0 @@
-<h1>{{message}}</h1>
-
-<script>
-	export default {
-		preload({ query }) {
-			return this.fetch(`credentials/test.json`, {
-				credentials: query.creds
-			}).then(r => r.json());
-		}
-	};
-</script>

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'
-		}));
-	}
-}