mirror of https://github.com/webpack/webpack.git
60 lines
1.6 KiB
JavaScript
60 lines
1.6 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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class LimitChunkCountPlugin {
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constructor(options) {
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if(options !== undefined && typeof options !== "object" || Array.isArray(options)) {
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throw new Error("Argument should be an options object.\nFor more info on options, see https://webpack.github.io/docs/list-of-plugins.html");
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}
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this.options = options || {};
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}
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apply(compiler) {
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const options = this.options;
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compiler.plugin("compilation", (compilation) => {
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compilation.plugin("optimize-chunks-advanced", (chunks) => {
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const maxChunks = options.maxChunks;
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if(!maxChunks) return;
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if(maxChunks < 1) return;
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if(chunks.length <= maxChunks) return;
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if(chunks.length > maxChunks) {
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let combinations = [];
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chunks.forEach((a, idx) => {
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for(let i = 0; i < idx; i++) {
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const b = chunks[i];
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combinations.push([b, a]);
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}
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});
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combinations.forEach((pair) => {
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const a = pair[0].size(options);
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const b = pair[1].size(options);
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const ab = pair[0].integratedSize(pair[1], options);
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pair.unshift(a + b - ab, ab);
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pair.push(a, b);
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});
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combinations = combinations.filter((pair) => {
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return pair[1] !== false;
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});
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combinations.sort((a, b) => {
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const diff = b[0] - a[0];
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if(diff !== 0) return diff;
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return a[1] - b[1];
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});
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const pair = combinations[0];
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if(pair && pair[2].integrate(pair[3], "limit")) {
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chunks.splice(chunks.indexOf(pair[3]), 1);
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return true;
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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 = LimitChunkCountPlugin;
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