init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const RequireEnsureDependency = require("./RequireEnsureDependency");
const RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
 
const RequireEnsureDependenciesBlockParserPlugin = require("./RequireEnsureDependenciesBlockParserPlugin");
 
const {
    JAVASCRIPT_MODULE_TYPE_AUTO,
    JAVASCRIPT_MODULE_TYPE_DYNAMIC
} = require("../ModuleTypeConstants");
const {
    evaluateToString,
    toConstantDependency
} = require("../javascript/JavascriptParserHelpers");
 
/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
/** @typedef {import("../Compiler")} Compiler */
/** @typedef {import("../javascript/JavascriptParser")} Parser */
 
const PLUGIN_NAME = "RequireEnsurePlugin";
 
class RequireEnsurePlugin {
    /**
     * Apply the plugin
     * @param {Compiler} compiler the compiler instance
     * @returns {void}
     */
    apply(compiler) {
        compiler.hooks.compilation.tap(
            PLUGIN_NAME,
            (compilation, { normalModuleFactory }) => {
                compilation.dependencyFactories.set(
                    RequireEnsureItemDependency,
                    normalModuleFactory
                );
                compilation.dependencyTemplates.set(
                    RequireEnsureItemDependency,
                    new RequireEnsureItemDependency.Template()
                );
 
                compilation.dependencyTemplates.set(
                    RequireEnsureDependency,
                    new RequireEnsureDependency.Template()
                );
 
                /**
                 * @param {Parser} parser parser parser
                 * @param {JavascriptParserOptions} parserOptions parserOptions
                 * @returns {void}
                 */
                const handler = (parser, parserOptions) => {
                    if (
                        parserOptions.requireEnsure !== undefined &&
                        !parserOptions.requireEnsure
                    )
                        return;
 
                    new RequireEnsureDependenciesBlockParserPlugin().apply(parser);
                    parser.hooks.evaluateTypeof
                        .for("require.ensure")
                        .tap(PLUGIN_NAME, evaluateToString("function"));
                    parser.hooks.typeof
                        .for("require.ensure")
                        .tap(
                            PLUGIN_NAME,
                            toConstantDependency(parser, JSON.stringify("function"))
                        );
                };
 
                normalModuleFactory.hooks.parser
                    .for(JAVASCRIPT_MODULE_TYPE_AUTO)
                    .tap(PLUGIN_NAME, handler);
                normalModuleFactory.hooks.parser
                    .for(JAVASCRIPT_MODULE_TYPE_DYNAMIC)
                    .tap(PLUGIN_NAME, handler);
            }
        );
    }
}
module.exports = RequireEnsurePlugin;