source: frontend/node_modules/webpack/lib/dll/DllModule.js

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

"use strict";

const { RawSource } = require("webpack-sources");
const Module = require("../Module");
const {
        JAVASCRIPT_TYPE,
        JAVASCRIPT_TYPES
} = require("../ModuleSourceTypeConstants");
const { JAVASCRIPT_MODULE_TYPE_DYNAMIC } = require("../ModuleTypeConstants");
const RuntimeGlobals = require("../RuntimeGlobals");
const makeSerializable = require("../util/makeSerializable");

/** @typedef {import("../config/defaults").WebpackOptionsNormalizedWithDefaults} WebpackOptions */
/** @typedef {import("../Compilation")} Compilation */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../Generator").SourceTypes} SourceTypes */
/** @typedef {import("../Module").BuildCallback} BuildCallback */
/** @typedef {import("../Module").CodeGenerationContext} CodeGenerationContext */
/** @typedef {import("../Module").CodeGenerationResult} CodeGenerationResult */
/** @typedef {import("../Module").NeedBuildCallback} NeedBuildCallback */
/** @typedef {import("../Module").NeedBuildContext} NeedBuildContext */
/** @typedef {import("../Module").Sources} Sources */
/** @typedef {import("../RequestShortener")} RequestShortener */
/** @typedef {import("../ResolverFactory").ResolverWithOptions} ResolverWithOptions */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../util/fs").InputFileSystem} InputFileSystem */

const RUNTIME_REQUIREMENTS = new Set([
        RuntimeGlobals.require,
        RuntimeGlobals.module
]);

class DllModule extends Module {
        /**
         * Creates an instance of DllModule.
         * @param {string} context context path
         * @param {Dependency[]} dependencies dependencies
         * @param {string} name name
         */
        constructor(context, dependencies, name) {
                super(JAVASCRIPT_MODULE_TYPE_DYNAMIC, context);

                // Info from Factory
                /** @type {Dependency[]} */
                this.dependencies = dependencies;
                this.name = name;
        }

        /**
         * Returns the source types this module can generate.
         * @returns {SourceTypes} types available (do not mutate)
         */
        getSourceTypes() {
                return JAVASCRIPT_TYPES;
        }

        /**
         * Returns the unique identifier used to reference this module.
         * @returns {string} a unique identifier of the module
         */
        identifier() {
                return `dll ${this.name}`;
        }

        /**
         * Returns a human-readable identifier for this module.
         * @param {RequestShortener} requestShortener the request shortener
         * @returns {string} a user readable identifier of the module
         */
        readableIdentifier(requestShortener) {
                return `dll ${this.name}`;
        }

        /**
         * Builds the module using the provided compilation context.
         * @param {WebpackOptions} options webpack options
         * @param {Compilation} compilation the compilation
         * @param {ResolverWithOptions} resolver the resolver
         * @param {InputFileSystem} fs the file system
         * @param {BuildCallback} callback callback function
         * @returns {void}
         */
        build(options, compilation, resolver, fs, callback) {
                this.buildMeta = {};
                this.buildInfo = {};
                return callback();
        }

        /**
         * Generates code and runtime requirements for this module.
         * @param {CodeGenerationContext} context context for code generation
         * @returns {CodeGenerationResult} result
         */
        codeGeneration(context) {
                /** @type {Sources} */
                const sources = new Map();
                sources.set(
                        JAVASCRIPT_TYPE,
                        new RawSource(`module.exports = ${RuntimeGlobals.require};`)
                );
                return {
                        sources,
                        runtimeRequirements: RUNTIME_REQUIREMENTS
                };
        }

        /**
         * Checks whether the module needs to be rebuilt for the current build state.
         * @param {NeedBuildContext} context context info
         * @param {NeedBuildCallback} callback callback function, returns true, if the module needs a rebuild
         * @returns {void}
         */
        needBuild(context, callback) {
                return callback(null, !this.buildMeta);
        }

        /**
         * Returns the estimated size for the requested source type.
         * @param {string=} type the source type for which the size should be estimated
         * @returns {number} the estimated size of the module (must be non-zero)
         */
        size(type) {
                return 12;
        }

        /**
         * Updates the hash with the data contributed by this instance.
         * @param {Hash} hash the hash used to track dependencies
         * @param {UpdateHashContext} context context
         * @returns {void}
         */
        updateHash(hash, context) {
                hash.update(`dll module${this.name || ""}`);
                super.updateHash(hash, context);
        }

        /**
         * Serializes this instance into the provided serializer context.
         * @param {ObjectSerializerContext} context context
         */
        serialize(context) {
                context.write(this.name);
                super.serialize(context);
        }

        /**
         * Restores this instance from the provided deserializer context.
         * @param {ObjectDeserializerContext} context context
         */
        deserialize(context) {
                this.name = context.read();
                super.deserialize(context);
        }

        /**
         * Assuming this module is in the cache. Update the (cached) module with
         * the fresh module from the factory. Usually updates internal references
         * and properties.
         * @param {Module} module fresh module
         * @returns {void}
         */
        updateCacheModule(module) {
                super.updateCacheModule(module);
                this.dependencies = module.dependencies;
        }

        /**
         * Assuming this module is in the cache. Remove internal references to allow freeing some memory.
         */
        cleanupForCache() {
                super.cleanupForCache();
                this.dependencies = /** @type {EXPECTED_ANY} */ (undefined);
        }
}

makeSerializable(DllModule, "webpack/lib/dll/DllModule");

module.exports = DllModule;