add a --bundler option, for forcing rollup or webpack

src/api/build.ts

@@ -7,6 +7,7 @@ import minify_html from './utils/minify_html';
 import { create_compilers, create_main_manifests, create_routes, create_serviceworker_manifest } from '../core';
 import { Compilers, Compiler } from '../core/create_compilers';
 import * as events from './interfaces';
+import validate_bundler from '../cli/utils/validate_bundler';
 
 export function build(opts: {}) {
 	const emitter = new EventEmitter();
@@ -28,6 +29,7 @@ export function build(opts: {}) {
 async function execute(emitter: EventEmitter, {
 	dest = 'build',
 	app = 'app',
+	bundler,
 	webpack = 'webpack',
 	rollup = 'rollup',
 	routes = 'routes'
@@ -53,7 +55,7 @@ async function execute(emitter: EventEmitter, {
 	// create app/manifest/client.js and app/manifest/server.js
 	create_main_manifests({ routes: route_objects });
 
-	const { client, server, serviceworker } = create_compilers({ webpack, rollup });
+	const { client, server, serviceworker } = create_compilers(validate_bundler(bundler), { webpack, rollup });
 
 	const client_result = await client.compile();
 	emitter.emit('build', <events.BuildEvent>{

src/api/dev.ts

@@ -11,16 +11,19 @@ import { create_routes, create_main_manifests, create_compilers, create_servicew
 import { Compiler, Compilers, CompileResult, CompileError } from '../core/create_compilers';
 import Deferred from './utils/Deferred';
 import * as events from './interfaces';
+import validate_bundler from '../cli/utils/validate_bundler';
 
 export function dev(opts) {
 	return new Watcher(opts);
 }
 
 class Watcher extends EventEmitter {
+	bundler: string;
 	dirs: {
 		app: string;
 		dest: string;
 		routes: string;
+		rollup: string;
 		webpack: string;
 	}
 	port: number;
@@ -47,6 +50,7 @@ class Watcher extends EventEmitter {
 		app = locations.app(),
 		dest = locations.dest(),
 		routes = locations.routes(),
+		bundler,
 		webpack = 'webpack',
 		rollup = 'rollup',
 		port = +process.env.PORT
@@ -54,12 +58,14 @@ class Watcher extends EventEmitter {
 		app: string,
 		dest: string,
 		routes: string,
+		bundler?: string,
 		webpack: string,
 		rollup: string,
 		port: number
 	}) {
 		super();
 
+		this.bundler = validate_bundler(bundler);
 		this.dirs = { app, dest, routes, webpack, rollup };
 		this.port = port;
 		this.closed = false;
@@ -157,7 +163,7 @@ class Watcher extends EventEmitter {
 		};
 
 		// TODO watch the configs themselves?
-		const compilers: Compilers = create_compilers({
+		const compilers: Compilers = create_compilers(this.bundler, {
 			webpack: this.dirs.webpack,
 			rollup: this.dirs.rollup
 		});

src/api/export.ts

@@ -13,7 +13,7 @@ import * as events from './interfaces';
 type Opts = {
 	build: string,
 	dest: string,
-	basepath: string,
+	basepath?: string,
 	timeout: number | false
 };
 

src/cli/build.ts

@@ -1,14 +1,18 @@
 import { build as _build } from '../api/build';
-import colors from 'kleur';
+import * as colors from 'kleur';
 import { locations } from '../config';
+import validate_bundler from './utils/validate_bundler';
+
+export function build(opts: { bundler?: string }) {
+	const bundler = validate_bundler(opts.bundler);
 
-export function build() {
 	return new Promise((fulfil, reject) => {
 		try {
 			const emitter = _build({
 				dest: locations.dest(),
 				app: locations.app(),
 				routes: locations.routes(),
+				bundler,
 				webpack: 'webpack',
 				rollup: 'rollup'
 			});

src/cli/dev.ts

@@ -5,7 +5,7 @@ import prettyMs from 'pretty-ms';
 import { dev as _dev } from '../api/dev';
 import * as events from '../api/interfaces';
 
-export function dev(opts: { port: number, open: boolean }) {
+export function dev(opts: { port: number, open: boolean, bundler?: string }) {
 	try {
 		const watcher = _dev(opts);
 

src/cli/export.ts

@@ -1,5 +1,5 @@
 import { exporter as _exporter } from '../api/export';
-import colors from 'kleur';
+import * as colors from 'kleur';
 import prettyBytes from 'pretty-bytes';
 import { locations } from '../config';
 

src/cli/utils/validate_bundler.ts

@@ -0,0 +1,21 @@
+import * as fs from 'fs';
+
+export default function validate_bundler(bundler?: string) {
+	if (!bundler) {
+		bundler = (
+			fs.existsSync('rollup') ? 'rollup' :
+			fs.existsSync('webpack') ? 'webpack' :
+			null
+		);
+
+		if (!bundler) {
+			throw new Error(`Could not find a 'rollup' or 'webpack' directory`);
+		}
+	}
+
+	if (bundler !== 'rollup' && bundler !== 'webpack') {
+		throw new Error(`'${bundler}' is not a valid option for --bundler — must be either 'rollup' or 'webpack'`);
+	}
+
+	return bundler;
+}

src/core/create_compilers.ts

@@ -211,8 +211,8 @@ export type Compilers = {
 	serviceworker?: Compiler;
 }
 
-export default function create_compilers({ webpack, rollup }: { webpack: string, rollup: string }): Compilers {
-	if (fs.existsSync(rollup)) {
+export default function create_compilers(bundler: string, { webpack, rollup }: { webpack: string, rollup: string }): Compilers {
+	if (bundler === 'rollup') {
 		if (!r) r = relative('rollup', process.cwd());
 
 		const sw = `${rollup}/service-worker.config.js`;
@@ -224,7 +224,7 @@ export default function create_compilers({ webpack, rollup }: { webpack: string,
 		};
 	}
 
-	if (fs.existsSync(webpack)) {
+	if (bundler === 'webpack') {
 		if (!wp) wp = relative('webpack', process.cwd());
 
 		const sw = `${webpack}/service-worker.config.js`;
@@ -236,7 +236,8 @@ export default function create_compilers({ webpack, rollup }: { webpack: string,
 		};
 	}
 
-	throw new Error(`Could not find config files for rollup or webpack`);
+	// this shouldn't be possible...
+	throw new Error(`Invalid bundler option '${bundler}'`);
 }
 
 const locPattern = /\((\d+):(\d+)\)$/;