From 6ff5dcfa508c4c7e8270ff664f894514de2398d5 Mon Sep 17 00:00:00 2001
From: Wojciech Figat <wojtek@figat.pl>
Date: Wed, 21 Dec 2022 10:45:24 +0100
Subject: [PATCH] Improve build rules assembly cache to include build tool
 changes

---
 Source/Tools/Flax.Build/Build/Assembler.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Source/Tools/Flax.Build/Build/Assembler.cs b/Source/Tools/Flax.Build/Build/Assembler.cs
index 938188d3f..aeb2bb241 100644
--- a/Source/Tools/Flax.Build/Build/Assembler.cs
+++ b/Source/Tools/Flax.Build/Build/Assembler.cs
@@ -83,6 +83,14 @@ namespace Flax.Build
                         recentWriteTime = lastWriteTime;
                 }
 
+                // Include build tool version (eg. skip using cached assembly after editing build tool)
+                {
+                    var executingAssembly = Assembly.GetExecutingAssembly();
+                    DateTime lastWriteTime = File.GetLastWriteTime(executingAssembly.Location);
+                    if (lastWriteTime > recentWriteTime)
+                        recentWriteTime = lastWriteTime;
+                }
+
                 DateTime cacheTime = File.Exists(CachePath)
                     ? DateTime.FromBinary(long.Parse(File.ReadAllText(CachePath)))
                     : DateTime.MinValue;