guido/lib/scripts/build.js

基于webpack4的一键式开发工具，集成handlebars、雪碧图、SVG Sprite、自定义资源注入等方式

'use strict';

process.env.BABEL_ENV = 'production';
process.env.NODE_ENV = 'production';

process.on('unhandledRejection', err => {
	throw err;
});

const chalk = require('chalk');
const del = require('del');

const print = require('../utils/print');
const createWebpackConfig = require('../utils/createWebpackConfig');
const createWebpackCompiler = require('../utils/createWebpackCompiler');
const printBuildError = require('../utils/printBuildError');
const FileSizeReporter = require('../utils/fileSizeReporter');
const measureFileSizesBeforeBuild =
	FileSizeReporter.measureFileSizesBeforeBuild;
const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;

const title = chalk.bold.blue(`====== Guido Build ======`);
print(title, { clear: true });
print(chalk.blue(`\n创建编译器`));

createWebpackConfig()
	.then(config => {
		return Promise.all([
			measureFileSizesBeforeBuild(config.output.path),
			createWebpackCompiler(config),
			del(config.output.path, {
				force: true,
			}),
		]);
	})
	.then(([previousFileSizes, compiler]) => {
		return new Promise((resolve, reject) => {
			print(title, { clear: true });
			compiler.run((err, stats) => {
				if (err) {
					return reject(err);
				}

				let jsonStats = stats.toJson({
					all: false,
					errors: true,
				});
				if (stats.hasErrors() && jsonStats.errors.length > 0) {
					let error = new Error(jsonStats.errors[0]);
					error.errors = jsonStats.errors;
					return reject(error);
				}

				return resolve({
					stats,
					outputPath: compiler.options.output.path,
					previousFileSizes,
				});
			});
		});
	})
	.then(({ stats, outputPath, previousFileSizes }) => {
		print('File sizes after gzip:');
		printFileSizesAfterBuild(stats, previousFileSizes, outputPath);
		console.log();
	})
	.catch(err => {
		if (err && !err.errors && err.message) {
			print(title, { clear: true });
			printBuildError([err], 'error');
		}
		process.exit(1);
	});