mirror of https://github.com/webpack/webpack.git
99 lines
3.2 KiB
JavaScript
99 lines
3.2 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(chunkNames, filenameTemplate, selectedChunks, minCount) {
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if(typeof filenameTemplate !== "string" && filenameTemplate !== null) {
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minCount = selectedChunks;
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selectedChunks = filenameTemplate
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filenameTemplate = chunkNames;
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}
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if(!Array.isArray(selectedChunks) && typeof selectedChunks !== "boolean") {
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minCount = selectedChunks;
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selectedChunks = undefined;
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}
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this.chunkNames = chunkNames;
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this.filenameTemplate = filenameTemplate;
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this.minCount = minCount;
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this.selectedChunks = selectedChunks;
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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 chunkNames = this.chunkNames;
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var filenameTemplate = this.filenameTemplate;
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var minCount = this.minCount;
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var selectedChunks = this.selectedChunks;
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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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if(!chunkNames && selectedChunks === false) {
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var commonChunks = chunks;
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} else if(Array.isArray(chunkNames)) {
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var commonChunks = chunks.filter(function(chunk) {
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return chunkNames.indexOf(chunk.name) >= 0;
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});
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} else {
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var commonChunks = chunks.filter(function(chunk) {
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return chunk.name === chunkNames;
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});
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}
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if(commonChunks.length === 0) {
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var chunk = this.addChunk(chunkNames);
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chunk.initial = chunk.entry = true;
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commonChunks = [chunk];
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}
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commonChunks.forEach(function processCommonChunk(commonChunk) {
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var commonModulesCount = [];
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var commonModules = [];
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if(Array.isArray(selectedChunks)) {
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var usedChunks = chunks.filter(function(chunk) {
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if(chunk === commonChunk) return false;
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return selectedChunks.indexOf(chunk.name) >= 0;
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});
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} else if(selectedChunks === false || !commonChunk.entry) {
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var usedChunks = (commonChunk.chunks || []).filter(function(chunk) {
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// we can only move modules from this chunk if the "commonChunk" is the only parent
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return chunk.parents.length === 1;
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});
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} else {
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var usedChunks = chunks.filter(function(chunk) {
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if(chunk === commonChunk) return false;
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return chunk.entry;
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});
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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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var module = commonModules[idx];
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if(typeof minCount === "function") {
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if(!minCount(module, count))
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return;
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} else if(count < (minCount || Math.max(2, usedChunks.length))) {
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return;
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}
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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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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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if(filenameTemplate)
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commonChunk.filenameTemplate = filenameTemplate;
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});
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});
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});
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};
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