feat: parse --env.<flags> [WIP]

packages/webpack5/src/bin/index.ts

@@ -3,8 +3,10 @@
 import { redBright, green, greenBright } from 'chalk';
 import { program } from 'commander';
 import dedent from 'ts-dedent';
+import webpack from 'webpack';
 import path from 'path';
 import fs from 'fs';
+import { parseEnvFlags } from '../cli/parseEnvFlags';
 
 const defaultConfig = path.resolve(
 	__dirname,
@@ -20,6 +22,8 @@ function info(message: string) {
 	console.info(`${tag} ${greenBright(dedent(message))}`);
 }
 
+program.enablePositionalOptions();
+
 program
 	.command('init')
 	.description('Initialize a new webpack.config.js in the current directory.')
@@ -35,4 +39,63 @@ program
 		info('Initialized config.');
 	});
 
+program
+	.command('build')
+	.description('Build...')
+	.option('--env [name]', 'environment options')
+	.option('--hmr', 'enable HMR')
+	.option('--no-hmr', 'disable HMR')
+	.option('--watch', 'watch for changes')
+	.allowUnknownOption()
+	.action((options, command) => {
+		const env = parseEnvFlags(command.args);
+		// add --env <val> into the env object
+		// for example if we use --env prod
+		// we'd have env.env = 'prod'
+		if (options.env) {
+			env['env'] = options.env;
+		}
+		// const env = {
+		// 	platform: 'ios',
+		// 	verbose: true,
+		// 	appResourcesPath: 'App_Resources',
+		// 	appPath: 'src'
+		// }
+
+		const configPath = path.resolve(process.cwd(), 'webpack.config.js');
+		// todo: validate config exists
+		// todo: guard against invalid config
+		let configuration;
+		try {
+			configuration = require(configPath)(env);
+		} catch (ignore) {
+			console.log(ignore);
+		}
+
+		if (!configuration) {
+			console.log('No configuration!!!!!');
+			return;
+		}
+
+		const compiler = webpack(configuration);
+
+		// todo: handle --watch flag
+		// todo: promisify callback?
+		compiler.watch(
+			{
+				ignored: ['platforms'],
+			},
+			(err, stats) => {
+				if (stats) {
+					console.log(
+						stats.toString({
+							colors: true,
+						})
+					);
+				}
+				// err && console.log(err)
+			}
+		);
+	});
+
 program.parse(process.argv);