/*
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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 { WebpackError } = require("..");
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const { getUsedModuleIdsAndModules } = require("./IdHelpers");
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/** @typedef {import("../Compiler")} Compiler */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../util/fs").IntermediateFileSystem} IntermediateFileSystem */
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const plugin = "SyncModuleIdsPlugin";
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/**
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* @typedef {object} SyncModuleIdsPluginOptions
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* @property {string} path path to file
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* @property {string=} context context for module names
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* @property {((module: Module) => boolean)=} test selector for modules
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* @property {"read" | "create" | "merge" | "update"=} mode operation mode (defaults to merge)
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*/
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class SyncModuleIdsPlugin {
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/**
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* @param {SyncModuleIdsPluginOptions} options options
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*/
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constructor({ path, context, test, mode }) {
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this._path = path;
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this._context = context;
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this._test = test || (() => true);
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const readAndWrite = !mode || mode === "merge" || mode === "update";
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this._read = readAndWrite || mode === "read";
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this._write = readAndWrite || mode === "create";
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this._prune = mode === "update";
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}
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/**
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* Apply the plugin
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* @param {Compiler} compiler the compiler instance
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* @returns {void}
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*/
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apply(compiler) {
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/** @type {Map<string, string | number>} */
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let data;
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let dataChanged = false;
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if (this._read) {
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compiler.hooks.readRecords.tapAsync(plugin, callback => {
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const fs =
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/** @type {IntermediateFileSystem} */
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(compiler.intermediateFileSystem);
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fs.readFile(this._path, (err, buffer) => {
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if (err) {
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if (err.code !== "ENOENT") {
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return callback(err);
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}
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return callback();
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}
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const json = JSON.parse(/** @type {Buffer} */ (buffer).toString());
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data = new Map();
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for (const key of Object.keys(json)) {
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data.set(key, json[key]);
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}
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dataChanged = false;
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return callback();
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});
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});
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}
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if (this._write) {
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compiler.hooks.emitRecords.tapAsync(plugin, callback => {
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if (!data || !dataChanged) return callback();
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/** @type {{[key: string]: string | number}} */
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const json = {};
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const sorted = Array.from(data).sort(([a], [b]) => (a < b ? -1 : 1));
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for (const [key, value] of sorted) {
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json[key] = value;
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}
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const fs =
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/** @type {IntermediateFileSystem} */
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(compiler.intermediateFileSystem);
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fs.writeFile(this._path, JSON.stringify(json), callback);
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});
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}
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compiler.hooks.thisCompilation.tap(plugin, compilation => {
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const associatedObjectForCache = compiler.root;
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const context = this._context || compiler.context;
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if (this._read) {
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compilation.hooks.reviveModules.tap(plugin, (_1, _2) => {
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if (!data) return;
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const { chunkGraph } = compilation;
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const [usedIds, modules] = getUsedModuleIdsAndModules(
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compilation,
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this._test
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);
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for (const module of modules) {
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const name = module.libIdent({
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context,
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associatedObjectForCache
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});
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if (!name) continue;
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const id = data.get(name);
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const idAsString = `${id}`;
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if (usedIds.has(idAsString)) {
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const err = new WebpackError(
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`SyncModuleIdsPlugin: Unable to restore id '${id}' from '${this._path}' as it's already used.`
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);
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err.module = module;
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compilation.errors.push(err);
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}
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chunkGraph.setModuleId(module, /** @type {string | number} */ (id));
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usedIds.add(idAsString);
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}
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});
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}
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if (this._write) {
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compilation.hooks.recordModules.tap(plugin, modules => {
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const { chunkGraph } = compilation;
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let oldData = data;
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if (!oldData) {
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oldData = data = new Map();
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} else if (this._prune) {
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data = new Map();
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}
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for (const module of modules) {
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if (this._test(module)) {
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const name = module.libIdent({
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context,
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associatedObjectForCache
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});
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if (!name) continue;
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const id = chunkGraph.getModuleId(module);
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if (id === null) continue;
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const oldId = oldData.get(name);
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if (oldId !== id) {
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dataChanged = true;
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} else if (data === oldData) {
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continue;
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}
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data.set(name, id);
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}
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}
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if (data.size !== oldData.size) dataChanged = true;
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});
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}
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});
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}
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}
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module.exports = SyncModuleIdsPlugin;
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