chushihua

node_modules/webpack/lib/optimize/LimitChunkCountPlugin.js

@@ -0,0 +1,59 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class LimitChunkCountPlugin {
+	constructor(options) {
+		if(options !== undefined && typeof options !== "object" || Array.isArray(options)) {
+			throw new Error("Argument should be an options object.\nFor more info on options, see https://webpack.js.org/plugins/");
+		}
+		this.options = options || {};
+	}
+	apply(compiler) {
+		const options = this.options;
+		compiler.plugin("compilation", (compilation) => {
+			compilation.plugin("optimize-chunks-advanced", (chunks) => {
+				const maxChunks = options.maxChunks;
+				if(!maxChunks) return;
+				if(maxChunks < 1) return;
+				if(chunks.length <= maxChunks) return;
+
+				if(chunks.length > maxChunks) {
+					const sortedExtendedPairCombinations = chunks.reduce((combinations, a, idx) => {
+						// create combination pairs
+						for(let i = 0; i < idx; i++) {
+							const b = chunks[i];
+							combinations.push([b, a]);
+						}
+						return combinations;
+					}, []).map((pair) => {
+						// extend combination pairs with size and integrated size
+						const a = pair[0].size(options);
+						const b = pair[1].size(options);
+						const ab = pair[0].integratedSize(pair[1], options);
+						return [a + b - ab, ab, pair[0], pair[1], a, b];
+					}).filter((extendedPair) => {
+						// filter pairs that do not have an integratedSize
+						// meaning they can NOT be integrated!
+						return extendedPair[1] !== false;
+					}).sort((a, b) => { // sadly javascript does an inplace sort here
+						// sort them by size
+						const diff = b[0] - a[0];
+						if(diff !== 0) return diff;
+						return a[1] - b[1];
+					});
+
+					const pair = sortedExtendedPairCombinations[0];
+
+					if(pair && pair[2].integrate(pair[3], "limit")) {
+						chunks.splice(chunks.indexOf(pair[3]), 1);
+						return true;
+					}
+				}
+			});
+		});
+	}
+}
+module.exports = LimitChunkCountPlugin;