added MinChunkSizePlugin

sokra · sokra · commit 0df61621ea3d · 2013-02-11T10:52:19.000+01:00
diff --git a/lib/WebpackOptionsApply.js b/lib/WebpackOptionsApply.js
@@ -27,6 +27,7 @@ var RequireContextPlugin = require("./dependencies/RequireContextPlugin");
 var RequireEnsurePlugin = require("./dependencies/RequireEnsurePlugin");
 
 var LimitChunkCountPlugin = require("./optimize/LimitChunkCountPlugin");
+var MinChunkSizePlugin = require("./optimize/MinChunkSizePlugin");
 var RemoveParentModulesPlugin = require("./optimize/RemoveParentModulesPlugin");
 var RemoveEmptyChunksPlugin = require("./optimize/RemoveEmptyChunksPlugin");
 var MergeDuplicateChunksPlugin = require("./optimize/MergeDuplicateChunksPlugin");
@@ -92,6 +93,9 @@ WebpackOptionsApply.prototype.process = function(options, compiler) {
 		new RemoveEmptyChunksPlugin(),
 		new MergeDuplicateChunksPlugin()
 	);
+	if(options.optimize && options.optimize.minChunkSize)
+		compiler.apply(new MinChunkSizePlugin(options.optimize.minChunkSize));
+
 	if(options.optimize && options.optimize.maxChunks)
 		compiler.apply(new LimitChunkCountPlugin(options.optimize));
 
diff --git a/lib/optimize/MinChunkSizePlugin.js b/lib/optimize/MinChunkSizePlugin.js
@@ -0,0 +1,51 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+function chunkSizeWithModules(modules) {
+	return modules.map(function(m) {
+		return m.size();
+	}).reduce(function(a, b) {
+		return a + b;
+	});
+}
+
+function MinChunkSizePlugin(minChunkSize) {
+	this.minChunkSize = minChunkSize;
+}
+module.exports = MinChunkSizePlugin;
+
+MinChunkSizePlugin.prototype.apply = function(compiler) {
+	var minChunkSize = this.minChunkSize;
+	compiler.plugin("compilation", function(compilation) {
+		compilation.plugin("optimize-chunks", function(chunks) {
+
+			var argumentedChunks = chunks.map(function(chunk) {
+				return {
+					size: chunkSizeWithModules(chunk.modules),
+					entry: !!chunk.entry,
+					chunk: chunk
+				}
+			}).sort(function(a, b) {
+				if(a.entry != b.entry) {
+					return a.entry ? 1 : -1;
+				}
+				return b.size - a.size;
+			});
+
+			if(argumentedChunks[0].size < minChunkSize) {
+				for(var i = 1; i < argumentedChunks.length; i++) {
+					if(argumentedChunks[i].size + argumentedChunks[0].size >= minChunkSize)
+						break;
+				}
+				if(i == argumentedChunks.length) i = 1;
+				if(argumentedChunks[i]) {
+					argumentedChunks[i].chunk.integrate(argumentedChunks[0].chunk, "min-size");
+					chunks.splice(chunks.indexOf(argumentedChunks[0].chunk), 1);
+					this.restartApplyPlugins();
+				}
+			}
+		});
+	});
+};
+
