mirror of https://github.com/webpack/webpack.git
109 lines
3.1 KiB
JavaScript
109 lines
3.1 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const webpackOptionsSchema = require("../schemas/WebpackOptions.json");
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const Compiler = require("./Compiler");
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const MultiCompiler = require("./MultiCompiler");
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const WebpackOptionsApply = require("./WebpackOptionsApply");
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const WebpackOptionsDefaulter = require("./WebpackOptionsDefaulter");
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const WebpackOptionsValidationError = require("./WebpackOptionsValidationError");
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const NodeEnvironmentPlugin = require("./node/NodeEnvironmentPlugin");
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const validateSchema = require("./validateSchema");
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/** @typedef {import("../declarations/WebpackOptions").WebpackOptions} WebpackOptions */
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/** @typedef {import("./MultiStats")} MultiStats */
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/** @typedef {import("./Stats")} Stats */
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/**
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* @template T
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* @callback Callback
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* @param {Error=} err
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* @param {T=} stats
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* @returns {void}
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*/
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/**
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* @param {WebpackOptions[]} childOptions options array
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* @returns {MultiCompiler} a multi-compiler
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*/
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const createMultiCompiler = childOptions => {
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const compilers = childOptions.map(options => createCompiler(options));
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const compiler = new MultiCompiler(compilers);
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for (const childCompiler of compilers) {
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if (childCompiler.options.dependencies) {
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compiler.setDependencies(
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childCompiler,
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childCompiler.options.dependencies
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);
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}
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}
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return compiler;
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};
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/**
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* @param {WebpackOptions} options options object
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* @returns {Compiler} a compiler
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*/
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const createCompiler = options => {
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options = new WebpackOptionsDefaulter().process(options);
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const compiler = new Compiler(options.context);
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compiler.options = options;
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new NodeEnvironmentPlugin().apply(compiler);
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if (Array.isArray(options.plugins)) {
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for (const plugin of options.plugins) {
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if (typeof plugin === "function") {
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plugin.call(compiler, compiler);
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} else {
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plugin.apply(compiler);
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}
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}
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}
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compiler.hooks.environment.call();
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compiler.hooks.afterEnvironment.call();
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compiler.options = new WebpackOptionsApply().process(options, compiler);
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return compiler;
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};
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/**
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* @param {WebpackOptions | WebpackOptions[]} options options object
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* @param {Callback<Stats | MultiStats>=} callback callback
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* @returns {Compiler | MultiCompiler} the compiler object
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*/
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const webpack = (options, callback) => {
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const validationErrors = validateSchema(webpackOptionsSchema, options);
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if (validationErrors.length) {
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throw new WebpackOptionsValidationError(validationErrors);
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}
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/** @type {TODO} */
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let compiler;
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let watch = false;
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let watchOptions;
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if (Array.isArray(options)) {
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compiler = createMultiCompiler(options);
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watch = options.some(options => options.watch);
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watchOptions = options.map(options => options.watchOptions || {});
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} else {
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compiler = createCompiler(options);
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watch = options.watch;
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watchOptions = options.watchOptions || {};
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}
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if (callback) {
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if (watch) {
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compiler.watch(watchOptions, callback);
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} else {
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compiler.run((err, stats) => {
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compiler.close(err2 => {
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callback(err || err2, stats);
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});
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});
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}
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}
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return compiler;
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};
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module.exports = webpack;
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