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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const GraphHelpers = require("../GraphHelpers");
class EnsureChunkConditionsPlugin {
apply(compiler) {
compiler.hooks.compilation.tap(
"EnsureChunkConditionsPlugin",
compilation => {
const handler = chunks => {
let changed = false;
for (const module of compilation.modules) {
if (!module.chunkCondition) continue;
const sourceChunks = new Set();
const chunkGroups = new Set();
for (const chunk of module.chunksIterable) {
if (!module.chunkCondition(chunk)) {
sourceChunks.add(chunk);
for (const group of chunk.groupsIterable) {
chunkGroups.add(group);
}
}
}
if (sourceChunks.size === 0) continue;
const targetChunks = new Set();
chunkGroupLoop: for (const chunkGroup of chunkGroups) {
// Can module be placed in a chunk of this group?
for (const chunk of chunkGroup.chunks) {
if (module.chunkCondition(chunk)) {
targetChunks.add(chunk);
continue chunkGroupLoop;
}
}
// We reached the entrypoint: fail
if (chunkGroup.isInitial()) {
throw new Error(
"Cannot fullfil chunk condition of " + module.identifier()
);
}
// Try placing in all parents
for (const group of chunkGroup.parentsIterable) {
chunkGroups.add(group);
}
}
for (const sourceChunk of sourceChunks) {
GraphHelpers.disconnectChunkAndModule(sourceChunk, module);
}
for (const targetChunk of targetChunks) {
GraphHelpers.connectChunkAndModule(targetChunk, module);
}
}
if (changed) return true;
};
compilation.hooks.optimizeChunksBasic.tap(
"EnsureChunkConditionsPlugin",
handler
);
compilation.hooks.optimizeExtractedChunksBasic.tap(
"EnsureChunkConditionsPlugin",
handler
);
}
);
}
}
module.exports = EnsureChunkConditionsPlugin;