From b941a27b904e872f017cf96217a04925fd41201d Mon Sep 17 00:00:00 2001
From: MrTheShy <49885496+MrTheShy@users.noreply.github.com>
Date: Wed, 11 Mar 2026 23:16:31 +0100
Subject: [PATCH] fix: avoid full rebuild by writing BuildVer.h only when
 content changes

Previously, prebuild.ps1 unconditionally overwrote BuildVer.h on every
build using Set-Content, updating its timestamp even when the content
was identical. This caused MSBuild to treat all files depending on
BuildVer.h as out of date, triggering a full rebuild every time.

Fix: compare the new content with the existing file before writing.
BuildVer.h is now only written if sha, branch, or dev suffix has
actually changed.

Also removed the `git restore` call from postbuild.ps1 as it is no
longer needed.
---
 Minecraft.Client/postbuild.ps1 |  6 ++----
 Minecraft.Client/prebuild.ps1  | 14 ++++++++++++--
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/Minecraft.Client/postbuild.ps1 b/Minecraft.Client/postbuild.ps1
index 8ffc9b98b..6d2bda12b 100644
--- a/Minecraft.Client/postbuild.ps1
+++ b/Minecraft.Client/postbuild.ps1
@@ -36,8 +36,6 @@ foreach ($copy in $copies) {
 
     if (Test-Path $src) {
         # Copy the files using xcopy, forcing overwrite and suppressing errors, and only copying if the source is newer than the destination
-		xcopy /q /y /i /s /e /d "$src" "$dst" 2>$null
+        xcopy /q /y /i /s /e /d "$src" "$dst" 2>$null
     }
-}
-
-git restore "**/BuildVer.h"
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/Minecraft.Client/prebuild.ps1 b/Minecraft.Client/prebuild.ps1
index 0acbf023b..99078e9e5 100644
--- a/Minecraft.Client/prebuild.ps1
+++ b/Minecraft.Client/prebuild.ps1
@@ -27,7 +27,7 @@ if (git status --porcelain) {
     $suffix = "-dev"
 }
 
-@"
+$newContent = @"
 #pragma once
 
 #define VER_PRODUCTBUILD $build
@@ -35,4 +35,14 @@ if (git status --porcelain) {
 #define VER_FILEVERSION_STR_W VER_PRODUCTVERSION_STR_W
 #define VER_BRANCHVERSION_STR_W L"$ref"
 #define VER_NETWORK VER_PRODUCTBUILD
-"@ | Set-Content "Common/BuildVer.h"
+"@
+
+$path = "Common/BuildVer.h"
+$existing = if (Test-Path $path) { Get-Content $path -Raw } else { "" }
+
+if ($existing.Trim() -ne $newContent.Trim()) {
+    $newContent | Set-Content $path
+    Write-Host "BuildVer.h aggiornato."
+} else {
+    Write-Host "BuildVer.h invariato, skip."
+}
\ No newline at end of file