1 files changed, 121 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js b/node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js
new file mode 100644
index 000000000..826a6baa9
--- /dev/null
+++ b/node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js
@@ -0,0 +1,121 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class AggressiveMergingPlugin {
+	constructor(options) {
+		if(options !== undefined && typeof options !== "object" || Array.isArray(options)) {
+			throw new Error("Argument should be an options object. To use defaults, pass in nothing.\nFor more info on options, see https://webpack.js.org/plugins/");
+		}
+		this.options = options || {};
+	}
+
+	apply(compiler) {
+		const options = this.options;
+		const minSizeReduce = options.minSizeReduce || 1.5;
+
+		function getParentsWeight(chunk) {
+			return chunk.parents.map((p) => {
+				return p.isInitial() ? options.entryChunkMultiplicator || 10 : 1;
+			}).reduce((a, b) => {
+				return a + b;
+			}, 0);
+		}
+		compiler.plugin("compilation", (compilation) => {
+			compilation.plugin("optimize-chunks-advanced", (chunks) => {
+				let combinations = [];
+				chunks.forEach((a, idx) => {
+					if(a.isInitial()) return;
+					for(let i = 0; i < idx; i++) {
+						const b = chunks[i];
+						if(b.isInitial()) continue;
+						combinations.push([b, a]);
+					}
+				});
+
+				combinations.forEach((pair) => {
+					const a = pair[0].size({
+						chunkOverhead: 0
+					});
+					const b = pair[1].size({
+						chunkOverhead: 0
+					});
+					const ab = pair[0].integratedSize(pair[1], {
+						chunkOverhead: 0
+					});
+					pair.push({
+						a: a,
+						b: b,
+						ab: ab
+					});
+					let newSize;
+					if(ab === false) {
+						pair.unshift(false);
+					} else if(options.moveToParents) {
+						const aOnly = ab - b;
+						const bOnly = ab - a;
+						const common = a + b - ab;
+						newSize = common + getParentsWeight(pair[0]) * aOnly + getParentsWeight(pair[1]) * bOnly;
+						pair.push({
+							aOnly: aOnly,
+							bOnly: bOnly,
+							common: common,
+							newSize: newSize
+						});
+					} else {
+						newSize = ab;
+					}
+
+					pair.unshift((a + b) / newSize);
+				});
+				combinations = combinations.filter((pair) => {
+					return pair[0] !== false;
+				});
+				combinations.sort((a, b) => {
+					return b[0] - a[0];
+				});
+
+				const pair = combinations[0];
+
+				if(!pair) return;
+				if(pair[0] < minSizeReduce) return;
+
+				if(options.moveToParents) {
+					const commonModules = pair[1].modules.filter((m) => {
+						return pair[2].modules.indexOf(m) >= 0;
+					});
+					const aOnlyModules = pair[1].modules.filter((m) => {
+						return commonModules.indexOf(m) < 0;
+					});
+					const bOnlyModules = pair[2].modules.filter((m) => {
+						return commonModules.indexOf(m) < 0;
+					});
+					aOnlyModules.forEach((m) => {
+						pair[1].removeModule(m);
+						m.removeChunk(pair[1]);
+						pair[1].parents.forEach((c) => {
+							c.addModule(m);
+							m.addChunk(c);
+						});
+					});
+					bOnlyModules.forEach((m) => {
+						pair[2].removeModule(m);
+						m.removeChunk(pair[2]);
+						pair[2].parents.forEach((c) => {
+							c.addModule(m);
+							m.addChunk(c);
+						});
+					});
+				}
+				if(pair[1].integrate(pair[2], "aggressive-merge")) {
+					chunks.splice(chunks.indexOf(pair[2]), 1);
+					return true;
+				}
+			});
+		});
+	}
+}
+
+module.exports = AggressiveMergingPlugin;