mirror of https://github.com/webpack/webpack.git
70 lines
2.2 KiB
JavaScript
70 lines
2.2 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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function CommonsChunkPlugin(chunkName, filenameTemplate, entryPoints, minCount) {
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if(typeof filenameTemplate !== "string") {
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minCount = entryPoints;
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entryPoints = filenameTemplate
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filenameTemplate = chunkName;
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}
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if(typeof entryPoints === "number") {
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minCount = entryPoints;
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entryPoints = undefined;
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}
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this.chunkName = chunkName;
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this.filenameTemplate = filenameTemplate;
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this.minCount = minCount;
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this.entryPoints = entryPoints;
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}
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module.exports = CommonsChunkPlugin;
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CommonsChunkPlugin.prototype.apply = function(compiler) {
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var chunkName = this.chunkName;
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var filenameTemplate = this.filenameTemplate;
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var minCount = this.minCount;
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var entryPoints = this.entryPoints;
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compiler.plugin("this-compilation", function(compilation) {
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compilation.plugin(["optimize-chunks", "optimize-extracted-chunks"], function(chunks) {
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var commonModulesCount = [];
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var commonModules = [];
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var commonChunk = chunks.filter(function(chunk) {
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return chunk.name === chunkName;
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})[0] || this.addChunk(chunkName);
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var usedChunks = chunks.filter(function(chunk) {
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if(chunk === commonChunk) return false;
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if(!chunk.entry) return false;
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if(!entryPoints) return true;
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return entryPoints.indexOf(chunk.name) >= 0;
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});
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usedChunks.forEach(function(chunk) {
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chunk.modules.forEach(function(module) {
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var idx = commonModules.indexOf(module);
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if(idx < 0) {
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commonModules.push(module);
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commonModulesCount.push(1);
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} else {
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commonModulesCount[idx]++;
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}
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});
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});
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commonModulesCount.forEach(function(count, idx) {
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if(count >= (minCount || Math.max(2, usedChunks.length))) {
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var module = commonModules[idx];
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usedChunks.forEach(function(chunk) {
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module.removeChunk(chunk);
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});
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commonChunk.addModule(module);
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module.addChunk(commonChunk);
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}
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});
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usedChunks.forEach(function(chunk) {
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chunk.parents = [commonChunk];
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commonChunk.chunks.push(chunk);
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chunk.entry = false;
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});
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commonChunk.initial = commonChunk.entry = true;
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commonChunk.filenameTemplate = filenameTemplate;
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});
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});
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};
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