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1 files changed, 82 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/optimize/MinChunkSizePlugin.js b/node_modules/webpack/lib/optimize/MinChunkSizePlugin.js
new file mode 100644
index 00000000..144af278
--- /dev/null
+++ b/node_modules/webpack/lib/optimize/MinChunkSizePlugin.js
@@ -0,0 +1,82 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const validateOptions = require("schema-utils");
+const schema = require("../../schemas/plugins/optimize/MinChunkSizePlugin.json");
+
+/** @typedef {import("../../declarations/plugins/optimize/MinChunkSizePlugin").MinChunkSizePluginOptions} MinChunkSizePluginOptions */
+
+class MinChunkSizePlugin {
+	/**
+	 * @param {MinChunkSizePluginOptions} options options object
+	 */
+	constructor(options) {
+		validateOptions(schema, options, "Min Chunk Size Plugin");
+		this.options = options;
+	}
+
+	apply(compiler) {
+		const options = this.options;
+		const minChunkSize = options.minChunkSize;
+		compiler.hooks.compilation.tap("MinChunkSizePlugin", compilation => {
+			compilation.hooks.optimizeChunksAdvanced.tap(
+				"MinChunkSizePlugin",
+				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;