/*
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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 { compareChunksNatural } = require("../util/comparators");
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const { assignAscendingChunkIds } = require("./IdHelpers");
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/** @typedef {import("../../declarations/plugins/ids/OccurrenceChunkIdsPlugin").OccurrenceChunkIdsPluginOptions} OccurrenceChunkIdsPluginOptions */
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/** @typedef {import("../Chunk")} Chunk */
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/** @typedef {import("../Compiler")} Compiler */
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const PLUGIN_NAME = "OccurrenceChunkIdsPlugin";
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class OccurrenceChunkIdsPlugin {
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/**
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* Creates an instance of OccurrenceChunkIdsPlugin.
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* @param {OccurrenceChunkIdsPluginOptions=} options options object
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*/
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constructor(options = {}) {
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/** @type {OccurrenceChunkIdsPluginOptions} */
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this.options = options;
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}
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/**
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* Applies the plugin by registering its hooks on the compiler.
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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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compiler.hooks.validate.tap(PLUGIN_NAME, () => {
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compiler.validate(
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() =>
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require("../../schemas/plugins/ids/OccurrenceChunkIdsPlugin.json"),
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this.options,
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{
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name: "Occurrence Order Chunk Ids Plugin",
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baseDataPath: "options"
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},
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(options) =>
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require("../../schemas/plugins/ids/OccurrenceChunkIdsPlugin.check")(
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options
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)
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);
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});
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compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
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compilation.hooks.chunkIds.tap(PLUGIN_NAME, (chunks) => {
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const chunkGraph = compilation.chunkGraph;
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/** @type {Map<Chunk, number>} */
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const occursInInitialChunksMap = new Map();
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const compareNatural = compareChunksNatural(chunkGraph);
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for (const c of chunks) {
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let occurs = 0;
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for (const chunkGroup of c.groupsIterable) {
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for (const parent of chunkGroup.parentsIterable) {
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if (parent.isInitial()) occurs++;
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}
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}
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occursInInitialChunksMap.set(c, occurs);
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}
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/** @type {Chunk[]} */
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const chunksInOccurrenceOrder = [...chunks].sort((a, b) => {
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if (this.options.prioritiseInitial) {
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const aEntryOccurs =
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/** @type {number} */
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(occursInInitialChunksMap.get(a));
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const bEntryOccurs =
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/** @type {number} */
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(occursInInitialChunksMap.get(b));
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if (aEntryOccurs > bEntryOccurs) return -1;
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if (aEntryOccurs < bEntryOccurs) return 1;
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}
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const aOccurs = a.getNumberOfGroups();
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const bOccurs = b.getNumberOfGroups();
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if (aOccurs > bOccurs) return -1;
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if (aOccurs < bOccurs) return 1;
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return compareNatural(a, b);
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});
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assignAscendingChunkIds(chunksInOccurrenceOrder, compilation);
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});
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});
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}
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}
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module.exports = OccurrenceChunkIdsPlugin;
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