/*
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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 GraphHelpers = require("../GraphHelpers");
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class EnsureChunkConditionsPlugin {
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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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const handler = chunks => {
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let changed = false;
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for (const module of compilation.modules) {
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if (!module.chunkCondition) continue;
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const sourceChunks = new Set();
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const chunkGroups = new Set();
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for (const chunk of module.chunksIterable) {
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if (!module.chunkCondition(chunk)) {
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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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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)) {
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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 fullfil 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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GraphHelpers.disconnectChunkAndModule(sourceChunk, module);
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}
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for (const targetChunk of targetChunks) {
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GraphHelpers.connectChunkAndModule(targetChunk, module);
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}
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}
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if (changed) return true;
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};
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compilation.hooks.optimizeChunksBasic.tap(
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"EnsureChunkConditionsPlugin",
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handler
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);
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compilation.hooks.optimizeExtractedChunksBasic.tap(
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"EnsureChunkConditionsPlugin",
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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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