webpack/lib/LoaderOptionsPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
const NormalModule = require("./NormalModule");

const { validate } = require("schema-utils");
const schema = require("../schemas/plugins/LoaderOptionsPlugin.json");

/** @typedef {import("../declarations/plugins/LoaderOptionsPlugin").LoaderOptionsPluginOptions} LoaderOptionsPluginOptions */
/** @typedef {import("./Compiler")} Compiler */

class LoaderOptionsPlugin {
	/**
	 * @param {LoaderOptionsPluginOptions} options options object
	 */
	constructor(options = {}) {
		validate(schema, options, {
			name: "Loader Options Plugin",
			baseDataPath: "options"
		});
		if (typeof options !== "object") options = {};
		if (!options.test) {
			options.test = {
				test: () => true
			};
		}
		this.options = options;
	}

	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		const options = this.options;
		compiler.hooks.compilation.tap("LoaderOptionsPlugin", compilation => {
			NormalModule.getCompilationHooks(compilation).loader.tap(
				"LoaderOptionsPlugin",
				(context, module) => {
					const resource = module.resource;
					if (!resource) return;
					const i = resource.indexOf("?");
					if (
						ModuleFilenameHelpers.matchObject(
							options,
							i < 0 ? resource : resource.substr(0, i)
						)
					) {
						for (const key of Object.keys(options)) {
							if (key === "include" || key === "exclude" || key === "test") {
								continue;
							}
							context[key] = options[key];
						}
					}
				}
			);
		});
	}
}

module.exports = LoaderOptionsPlugin;