From 0ecfd7dced28f8f0e749e506b3675904a4585a3e Mon Sep 17 00:00:00 2001
From: Yavor Ivanov <yavor.ivanov@sap.com>
Date: Fri, 17 Nov 2023 10:05:19 +0200
Subject: [PATCH] Enable auto split for depCache

---
 lib/lbt/bundle/AutoSplitter.js | 42 +++++++++++++++++++++++++++++-----
 1 file changed, 36 insertions(+), 6 deletions(-)

diff --git a/lib/lbt/bundle/AutoSplitter.js b/lib/lbt/bundle/AutoSplitter.js
index 81752d2bb..7de0d9721 100644
--- a/lib/lbt/bundle/AutoSplitter.js
+++ b/lib/lbt/bundle/AutoSplitter.js
@@ -41,7 +41,9 @@ class AutoSplitter {
 		const numberOfParts = options.numberOfParts;
 		let totalSize = 0;
 		const moduleSizes = Object.create(null);
-		const depCacheSymbol = Symbol("depCache");
+		const depCacheSizes = [];
+		let depCacheLoaderSize = 0;
+		let depCacheSet = new Set();
 		this.optimize = !!options.optimize;
 
 		// ---- resolve module definition
@@ -76,8 +78,8 @@ class AutoSplitter {
 				});
 				break;
 			case SectionType.DepCache:
-				moduleSizes[depCacheSymbol] = "sap.ui.loader.config({depCacheUI5:{}});".length;
-				totalSize += moduleSizes[depCacheSymbol];
+				depCacheLoaderSize = "sap.ui.loader.config({depCacheUI5:{}});".length;
+				totalSize += depCacheLoaderSize;
 
 				section.modules.forEach( (module) => {
 					promises.push((async () => {
@@ -89,8 +91,12 @@ class AutoSplitter {
 						);
 						if (deps.length > 0) {
 							const depSize = `"${module}": [${deps.map((dep) => `"${dep}"`).join(",")}],`.length;
-							moduleSizes[depCacheSymbol] += depSize;
 							totalSize += depSize;
+
+							depCacheSizes.push({
+								size: depSize,
+								filters: [module, ...deps]
+							});
 						}
 					})());
 				});
@@ -204,10 +210,34 @@ class AutoSplitter {
 			case SectionType.DepCache:
 				currentSection = {
 					mode: SectionType.DepCache,
-					filters: section.modules.slice()
+					filters: []
 				};
 				currentModule.sections.push( currentSection );
-				totalSize += moduleSizes[depCacheSymbol];
+				totalSize += depCacheLoaderSize;
+
+				depCacheSizes.forEach((depCache) => {
+					if ( part + 1 < numberOfParts && totalSize + depCache.size / 2 > partSize ) {
+						currentSection.filters = Array.from(depCacheSet);
+						depCacheSet = new Set();
+						part++;
+						// start a new module
+						totalSize = depCacheLoaderSize;
+						currentSection = {
+							mode: SectionType.DepCache,
+							filters: []
+						};
+						currentModule = {
+							name: moduleNameWithPart.replace(/__part__/, part),
+							sections: [currentSection]
+						};
+						splittedModules.push(currentModule);
+					}
+
+					depCache.filters.forEach((moduleName) => depCacheSet.add(moduleName));
+					totalSize += depCache.size;
+				});
+
+				currentSection.filters = Array.from(depCacheSet);
 				break;
 			default:
 				break;