AutoPatcher: Add preinstall script

CHANGELOG.md

@@ -9,6 +9,8 @@
 - Add `OpenCore-Legacy-Patcher.plist` for applied patch info
   - Located under `/System/Library/CoreServices`
   - Lists patch sets applied including files installed and removed
+- Add `preinstall` script to AutoPatcher
+  - Removes old patcher files before installing new
 
 ## 0.4.4
 - Lower SIP requirement for Root Patching

payloads/InstallPackage/AutoPkg-Assets-Setup.pkgproj

@@ -520,6 +520,8 @@
 				</dict>
 				<key>PREINSTALL_PATH</key>
 				<dict>
+					<key>PATH</key>
+					<string>/Users/mykolagrymalyuk/Developer/OpenCore-Legacy-Patcher/payloads/InstallPackage/preinstall.sh</string>
 					<key>PATH_TYPE</key>
 					<integer>0</integer>
 				</dict>

payloads/InstallPackage/preinstall.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+app_path="/Library/Application Support/Dortania/OpenCore-Patcher.app"
+launch_agent_path="/Library/LaunchAgents/com.dortania.opencore-legacy-patcher.auto-patch.plist"
+if [ -d "$app_path" ]; then
+    echo "Found OpenCore-Patcher.app, removing..."
+    rm -rf "$app_path"
+fi
+
+if [ -f "$launch_agent_path" ]; then
+    echo "Found launch agent, removing..."
+    rm -f "$launch_agent_path"
+fi