source: imaps-frontend/node_modules/webpack/lib/DllReferencePlugin.js

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

"use strict";

const parseJson = require("json-parse-even-better-errors");
const DelegatedModuleFactoryPlugin = require("./DelegatedModuleFactoryPlugin");
const ExternalModuleFactoryPlugin = require("./ExternalModuleFactoryPlugin");
const WebpackError = require("./WebpackError");
const DelegatedSourceDependency = require("./dependencies/DelegatedSourceDependency");
const createSchemaValidation = require("./util/create-schema-validation");
const makePathsRelative = require("./util/identifier").makePathsRelative;

/** @typedef {import("../declarations/WebpackOptions").Externals} Externals */
/** @typedef {import("../declarations/plugins/DllReferencePlugin").DllReferencePluginOptions} DllReferencePluginOptions */
/** @typedef {import("../declarations/plugins/DllReferencePlugin").DllReferencePluginOptionsContent} DllReferencePluginOptionsContent */
/** @typedef {import("../declarations/plugins/DllReferencePlugin").DllReferencePluginOptionsManifest} DllReferencePluginOptionsManifest */
/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */

const validate = createSchemaValidation(
        require("../schemas/plugins/DllReferencePlugin.check.js"),
        () => require("../schemas/plugins/DllReferencePlugin.json"),
        {
                name: "Dll Reference Plugin",
                baseDataPath: "options"
        }
);

/** @typedef {{ path: string, data: DllReferencePluginOptionsManifest | undefined, error: Error | undefined }} CompilationDataItem */

class DllReferencePlugin {
        /**
         * @param {DllReferencePluginOptions} options options object
         */
        constructor(options) {
                validate(options);
                this.options = options;
                /** @type {WeakMap<object, CompilationDataItem>} */
                this._compilationData = new WeakMap();
        }

        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.compilation.tap(
                        "DllReferencePlugin",
                        (compilation, { normalModuleFactory }) => {
                                compilation.dependencyFactories.set(
                                        DelegatedSourceDependency,
                                        normalModuleFactory
                                );
                        }
                );

                compiler.hooks.beforeCompile.tapAsync(
                        "DllReferencePlugin",
                        (params, callback) => {
                                if ("manifest" in this.options) {
                                        const manifest = this.options.manifest;
                                        if (typeof manifest === "string") {
                                                /** @type {InputFileSystem} */
                                                (compiler.inputFileSystem).readFile(manifest, (err, result) => {
                                                        if (err) return callback(err);
                                                        /** @type {CompilationDataItem} */
                                                        const data = {
                                                                path: manifest,
                                                                data: undefined,
                                                                error: undefined
                                                        };
                                                        // Catch errors parsing the manifest so that blank
                                                        // or malformed manifest files don't kill the process.
                                                        try {
                                                                data.data = parseJson(
                                                                        /** @type {Buffer} */ (result).toString("utf-8")
                                                                );
                                                        } catch (parseErr) {
                                                                // Store the error in the params so that it can
                                                                // be added as a compilation error later on.
                                                                const manifestPath = makePathsRelative(
                                                                        /** @type {string} */ (compiler.options.context),
                                                                        manifest,
                                                                        compiler.root
                                                                );
                                                                data.error = new DllManifestError(
                                                                        manifestPath,
                                                                        /** @type {Error} */ (parseErr).message
                                                                );
                                                        }
                                                        this._compilationData.set(params, data);
                                                        return callback();
                                                });
                                                return;
                                        }
                                }
                                return callback();
                        }
                );

                compiler.hooks.compile.tap("DllReferencePlugin", params => {
                        let name = this.options.name;
                        let sourceType = this.options.sourceType;
                        let resolvedContent =
                                "content" in this.options ? this.options.content : undefined;
                        if ("manifest" in this.options) {
                                const manifestParameter = this.options.manifest;
                                let manifest;
                                if (typeof manifestParameter === "string") {
                                        const data =
                                                /** @type {CompilationDataItem} */
                                                (this._compilationData.get(params));
                                        // If there was an error parsing the manifest
                                        // file, exit now because the error will be added
                                        // as a compilation error in the "compilation" hook.
                                        if (data.error) {
                                                return;
                                        }
                                        manifest = data.data;
                                } else {
                                        manifest = manifestParameter;
                                }
                                if (manifest) {
                                        if (!name) name = manifest.name;
                                        if (!sourceType) sourceType = manifest.type;
                                        if (!resolvedContent) resolvedContent = manifest.content;
                                }
                        }
                        /** @type {Externals} */
                        const externals = {};
                        const source = `dll-reference ${name}`;
                        externals[source] = /** @type {string} */ (name);
                        const normalModuleFactory = params.normalModuleFactory;
                        new ExternalModuleFactoryPlugin(sourceType || "var", externals).apply(
                                normalModuleFactory
                        );
                        new DelegatedModuleFactoryPlugin({
                                source,
                                type: this.options.type,
                                scope: this.options.scope,
                                context:
                                        /** @type {string} */
                                        (this.options.context || compiler.options.context),
                                content:
                                        /** @type {DllReferencePluginOptionsContent} */
                                        (resolvedContent),
                                extensions: this.options.extensions,
                                associatedObjectForCache: compiler.root
                        }).apply(normalModuleFactory);
                });

                compiler.hooks.compilation.tap(
                        "DllReferencePlugin",
                        (compilation, params) => {
                                if ("manifest" in this.options) {
                                        const manifest = this.options.manifest;
                                        if (typeof manifest === "string") {
                                                const data = /** @type {CompilationDataItem} */ (
                                                        this._compilationData.get(params)
                                                );
                                                // If there was an error parsing the manifest file, add the
                                                // error as a compilation error to make the compilation fail.
                                                if (data.error) {
                                                        compilation.errors.push(
                                                                /** @type {DllManifestError} */ (data.error)
                                                        );
                                                }
                                                compilation.fileDependencies.add(manifest);
                                        }
                                }
                        }
                );
        }
}

class DllManifestError extends WebpackError {
        /**
         * @param {string} filename filename of the manifest
         * @param {string} message error message
         */
        constructor(filename, message) {
                super();

                this.name = "DllManifestError";
                this.message = `Dll manifest ${filename}\n${message}`;
        }
}

module.exports = DllReferencePlugin;