mirror of https://github.com/webpack/webpack.git
92 lines
2.4 KiB
JavaScript
92 lines
2.4 KiB
JavaScript
/*
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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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function chunkContainsModule(chunk, module) {
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const chunks = module.chunks;
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const modules = chunk.modules;
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if(chunks.length < modules.length) {
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return chunks.indexOf(chunk) >= 0;
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} else {
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return modules.indexOf(module) >= 0;
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}
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}
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function hasModule(chunk, module, checkedChunks) {
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if(chunkContainsModule(chunk, module)) return [chunk];
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if(chunk.parents.length === 0) return false;
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return allHaveModule(chunk.parents.filter((c) => {
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return checkedChunks.indexOf(c) < 0;
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}), module, checkedChunks);
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}
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function allHaveModule(someChunks, module, checkedChunks) {
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if(!checkedChunks) checkedChunks = [];
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var chunks = [];
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for(var i = 0; i < someChunks.length; i++) {
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checkedChunks.push(someChunks[i]);
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var subChunks = hasModule(someChunks[i], module, checkedChunks);
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if(!subChunks) return false;
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for(var index = 0; index < subChunks.length; index++) {
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var item = subChunks[index];
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if(!chunks.length || chunks.indexOf(item) < 0) {
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chunks.push(item);
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}
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}
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}
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return chunks;
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}
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function debugIds(chunks) {
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var list = [];
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for(var i = 0; i < chunks.length; i++) {
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var debugId = chunks[i].debugId;
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if(typeof debugId !== "number") {
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return "no";
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}
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list.push(debugId);
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}
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list.sort();
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return list.join(",");
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}
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class RemoveParentModulesPlugin {
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apply(compiler) {
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compiler.plugin("compilation", (compilation) => {
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compilation.plugin(["optimize-chunks-basic", "optimize-extracted-chunks-basic"], (chunks) => {
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for(var index = 0; index < chunks.length; index++) {
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var chunk = chunks[index];
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// TODO consider Map when performance has improved https://gist.github.com/sokra/b36098368da7b8f6792fd7c85fca6311
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var cache = Object.create(null);
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var modules = chunk.modules.slice();
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for(var i = 0; i < modules.length; i++) {
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var module = modules[i];
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if(chunk.parents.length === 0) continue;
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var dId = debugIds(module.chunks);
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var parentChunksWithModule;
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if((dId in cache) && dId !== "no") {
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parentChunksWithModule = cache[dId];
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} else {
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parentChunksWithModule = cache[dId] = allHaveModule(chunk.parents, module);
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}
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if(parentChunksWithModule) {
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module.rewriteChunkInReasons(chunk, parentChunksWithModule);
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chunk.removeModule(module);
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}
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}
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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 = RemoveParentModulesPlugin;
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