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89 lines
2.5 KiB
89 lines
2.5 KiB
4 weeks ago
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/*
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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 { STAGE_BASIC } = require("../OptimizationStages");
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/** @typedef {import("../Chunk")} Chunk */
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/** @typedef {import("../ChunkGroup")} ChunkGroup */
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/** @typedef {import("../Compiler")} Compiler */
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class EnsureChunkConditionsPlugin {
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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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compiler.hooks.compilation.tap(
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"EnsureChunkConditionsPlugin",
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compilation => {
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/**
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* @param {Iterable<Chunk>} chunks the chunks
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*/
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const handler = chunks => {
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const chunkGraph = compilation.chunkGraph;
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// These sets are hoisted here to save memory
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// They are cleared at the end of every loop
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/** @type {Set<Chunk>} */
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const sourceChunks = new Set();
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/** @type {Set<ChunkGroup>} */
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const chunkGroups = new Set();
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for (const module of compilation.modules) {
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if (!module.hasChunkCondition()) continue;
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for (const chunk of chunkGraph.getModuleChunksIterable(module)) {
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if (!module.chunkCondition(chunk, compilation)) {
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sourceChunks.add(chunk);
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for (const group of chunk.groupsIterable) {
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chunkGroups.add(group);
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}
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}
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}
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if (sourceChunks.size === 0) continue;
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/** @type {Set<Chunk>} */
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const targetChunks = new Set();
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chunkGroupLoop: for (const chunkGroup of chunkGroups) {
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// Can module be placed in a chunk of this group?
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for (const chunk of chunkGroup.chunks) {
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if (module.chunkCondition(chunk, compilation)) {
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targetChunks.add(chunk);
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continue chunkGroupLoop;
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}
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}
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// We reached the entrypoint: fail
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if (chunkGroup.isInitial()) {
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throw new Error(
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`Cannot fulfil chunk condition of ${module.identifier()}`
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);
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}
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// Try placing in all parents
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for (const group of chunkGroup.parentsIterable) {
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chunkGroups.add(group);
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}
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}
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for (const sourceChunk of sourceChunks) {
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chunkGraph.disconnectChunkAndModule(sourceChunk, module);
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}
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for (const targetChunk of targetChunks) {
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chunkGraph.connectChunkAndModule(targetChunk, module);
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}
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sourceChunks.clear();
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chunkGroups.clear();
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}
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};
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compilation.hooks.optimizeChunks.tap(
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{
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name: "EnsureChunkConditionsPlugin",
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stage: STAGE_BASIC
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},
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handler
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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 = EnsureChunkConditionsPlugin;
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