From d95f52f8e9ba151f3506fc739b2cdb2ad4047499 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Sat, 17 Feb 2018 11:15:26 -0500
Subject: [PATCH] fix tests, add WIP dev task

---
 package.json      |   1 +
 src/cli/dev.ts    | 106 ++++++++++++++++++++++++++++++++++++++++++++++
 src/cli/export.ts |   1 +
 src/cli/index.ts  |   5 ++-
 4 files changed, 112 insertions(+), 1 deletion(-)
 create mode 100644 src/cli/dev.ts

diff --git a/package.json b/package.json
index 0daf922..62df424 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
     "@types/glob": "^5.0.34",
     "@types/mkdirp": "^0.5.2",
     "@types/rimraf": "^2.0.2",
+    "compression": "^1.7.1",
     "css-loader": "^0.28.7",
     "electron": "^1.8.2",
     "eslint": "^4.13.1",
diff --git a/src/cli/dev.ts b/src/cli/dev.ts
new file mode 100644
index 0000000..5615186
--- /dev/null
+++ b/src/cli/dev.ts
@@ -0,0 +1,106 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import * as chalk from 'chalk';
+import * as child_process from 'child_process';
+import { create_compilers, create_app, create_routes, create_serviceworker, create_template } from 'sapper/core.js';
+
+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;
+}
+
+export default function create_watcher(src: string, dir: string) {
+	// initial build
+	const routes = create_routes({ src });
+	create_app({ routes, src, dev: true });
+
+	const compilers = create_compilers();
+
+	const deferreds = {
+		client: deferred(),
+		server: deferred()
+	};
+
+	const invalidate = () => Promise.all([
+		deferreds.client.promise,
+		deferreds.server.promise
+	]).then(([client_stats, server_stats]) => {
+		const client_info = client_stats.toJson();
+		fs.writeFileSync(path.join(dir, 'stats.client.json'), JSON.stringify(client_info, null, '  '));
+
+		const server_info = server_stats.toJson();
+		fs.writeFileSync(path.join(dir, 'stats.server.json'), JSON.stringify(server_info, null, '  '));
+
+		const client_files = client_info.assets.map((chunk: { name: string }) => `/client/${chunk.name}`);
+
+		return create_serviceworker({
+			routes: create_routes({ src }),
+			client_files,
+			src
+		});
+	});
+
+	function watch_compiler(type: 'client' | 'server', callback: (err: Error) => void) {
+		const compiler = compilers[type];
+
+		compiler.plugin('invalid', (filename: string) => {
+			console.log(chalk.cyan(`${type} bundle invalidated, file changed: ${chalk.bold(filename)}`));
+			deferreds[type] = deferred();
+			watcher.ready = invalidate();
+		});
+
+		compiler.plugin('failed', (err: Error) => {
+			deferreds[type].reject(err);
+		});
+
+		return compiler.watch({}, (err: Error, stats: any) => {
+			if (stats.hasErrors()) {
+				deferreds[type].reject(stats.toJson().errors[0]);
+			} else {
+				deferreds[type].fulfil(stats);
+			}
+		});
+	}
+
+	const chokidar = require('chokidar');
+
+	function watch_files(pattern: string, callback: () => void) {
+		const watcher = chokidar.watch(pattern, {
+			persistent: false
+		});
+
+		watcher.on('add', callback);
+		watcher.on('change', callback);
+		watcher.on('unlink', callback);
+	}
+
+	watch_files('routes/**/*.+(html|js|mjs)', () => {
+		const routes = create_routes({ src });
+		create_app({ routes, src, dev: true });
+	});
+
+	watch_files('app/template.html', () => {
+		const template = create_template();
+		// TODO reload current page?
+	});
+
+	watch_compiler('client', () => {
+
+	});
+
+	watch_compiler('server', () => {
+
+	});
+}
\ No newline at end of file
diff --git a/src/cli/export.ts b/src/cli/export.ts
index a60851f..557e32b 100644
--- a/src/cli/export.ts
+++ b/src/cli/export.ts
@@ -4,6 +4,7 @@ import * as sander from 'sander';
 import express from 'express';
 import cheerio from 'cheerio';
 import URL from 'url-parse';
+import fetch from 'node-fetch';
 
 const { OUTPUT_DIR = 'dist' } = process.env;
 
diff --git a/src/cli/index.ts b/src/cli/index.ts
index 93a5290..645d617 100755
--- a/src/cli/index.ts
+++ b/src/cli/index.ts
@@ -3,6 +3,7 @@ import chalk from 'chalk';
 import help from './help.md';
 import build from './build';
 import exporter from './export';
+import dev from './dev';
 import upgrade from './upgrade';
 import { dest, entry, src } from '../config';
 import * as pkg from '../../package.json';
@@ -39,7 +40,7 @@ if (cmd === 'build') {
 		});
 } else if (cmd === 'export') {
 	build({ dest, dev: false, entry, src })
-		.then(() => exporter({ src, dest }))
+		.then(() => exporter(dest))
 		.then(() => {
 			const elapsed = Date.now() - start;
 			console.error(`extracted in ${elapsed}ms`); // TODO beautify this, e.g. 'built in 4.7 seconds'
@@ -47,6 +48,8 @@ if (cmd === 'build') {
 		.catch(err => {
 			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
 		});
+} else if (cmd === 'dev') {
+	dev(src, dest);
 } else if (cmd === 'upgrade') {
 	upgrade();
 } else {