Allow non-production builds (#653)

* fix: `--production false` === `--no-production`

* tie CSS extraction to `isWatch` bool

Author: lukeed

src/commands/build.js

@@ -4,6 +4,8 @@ import { isDir, error } from '../util';
 import asyncCommand from '../lib/async-command';
 import runWebpack, { showStats, writeJsonStats } from '../lib/webpack/run-webpack';
 
+const toBool = val => val === void 0 || (val === 'false' ? false : val);
+
 export default asyncCommand({
 	command: 'build [src] [dest]',
 
@@ -60,6 +62,9 @@ export default asyncCommand({
 		let cwd = resolve(argv.cwd);
 		let modules = resolve(cwd, 'node_modules');
 
+		argv.prerender = toBool(argv.prerender);
+		argv.production = toBool(argv.production);
+
 		if (!isDir(modules)) {
 			return error('No `node_modules` found! Please run `npm install` before continuing.', 1);
 		}

src/lib/webpack/run-webpack.js

@@ -13,6 +13,7 @@ import { error, isDir, warn } from '../../util';
 
 export default function (watch=false, env, onprogress) {
 	env.isProd = env.production; // shorthand
+	env.isWatch = !!watch; // use HMR?
 	env.cwd = resolve(env.cwd || process.cwd());
 
 	// env.src='src' via `build` default

src/lib/webpack/webpack-base-config.js

@@ -25,7 +25,7 @@ function resolveDep(dep, cwd) {
 }
 
 export default function (env) {
-	const { cwd, isProd, src, source } = env;
+	const { cwd, isProd, isWatch, src, source } = env;
 
 	// Apply base-level `env` values
 	env.dest = resolve(cwd, env.dest || 'build');
@@ -210,7 +210,7 @@ export default function (env) {
 			// Extract CSS
 			new ExtractTextPlugin({
 				filename: isProd ? 'style.[contenthash:5].css' : 'style.css',
-				disable: !isProd,
+				disable: isWatch,
 				allChunks: true
 			}),
 			new webpack.optimize.CommonsChunkPlugin({
@@ -239,7 +239,7 @@ export default function (env) {
 			})
 		] : []),
 
-		devtool: isProd ? 'source-map' : 'cheap-module-eval-source-map',
+		devtool: isWatch ? 'cheap-module-eval-source-map' : 'source-map',
 
 		node: {
 			console: false,