chushihua

node_modules/webpack/lib/optimize/MinChunkSizePlugin.js

@@ -0,0 +1,65 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class MinChunkSizePlugin {
+	constructor(options) {
+		if(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;
+		const minChunkSize = options.minChunkSize;
+		compiler.plugin("compilation", (compilation) => {
+			compilation.plugin("optimize-chunks-advanced", (chunks) => {
+				const equalOptions = {
+					chunkOverhead: 1,
+					entryChunkMultiplicator: 1
+				};
+
+				const sortedSizeFilteredExtendedPairCombinations = 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;
+				}, []).filter((pair) => {
+					// check if one of the chunks sizes is smaller than the minChunkSize
+					const p0SmallerThanMinChunkSize = pair[0].size(equalOptions) < minChunkSize;
+					const p1SmallerThanMinChunkSize = pair[1].size(equalOptions) < minChunkSize;
+					return p0SmallerThanMinChunkSize || p1SmallerThanMinChunkSize;
+				}).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]];
+				}).filter((pair) => {
+					// filter pairs that do not have an integratedSize
+					// meaning they can NOT be integrated!
+					return pair[1] !== false;
+				}).sort((a, b) => { // sadly javascript does an inplace sort here
+					// sort by size
+					const diff = b[0] - a[0];
+					if(diff !== 0) return diff;
+					return a[1] - b[1];
+				});
+
+				if(sortedSizeFilteredExtendedPairCombinations.length === 0) return;
+
+				const pair = sortedSizeFilteredExtendedPairCombinations[0];
+
+				pair[2].integrate(pair[3], "min-size");
+				chunks.splice(chunks.indexOf(pair[3]), 1);
+				return true;
+			});
+		});
+	}
+}
+module.exports = MinChunkSizePlugin;