Uninstall old installer based setup first

CLIENT_DATA/delsub32.ins

@@ -3,7 +3,7 @@
 ; and published under the Terms of the General Public License.
 ; credits: http://www.opsi.org/en/credits/
 
-
+Set $UninstallProgram$ = $InstallDir$ + "\" + $UninstallProg$
 Set $IniFile$ = $InstallDir$ + "\opsi-" + $ProductId$ + ".ini"
 
 if FileExists($IniFile$)
@@ -30,6 +30,14 @@ if not (GetRegistryStringValue32("[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
 	sub_check_exitcode
 endif
 
+if FileExists($UninstallProgram$)
+	comment "Uninstall program found, starting uninstall"
+	Dosbatch_uninstall
+	sub_check_exitcode
+	Winbatch_uninstall /WaitforProcessending "Au_.exe" /Timeoutseconds 10
+	sub_check_exitcode
+endif
+
 comment "Delete files"
 Files_uninstall /32Bit
 
@@ -49,6 +57,9 @@ msiexec /x $MsiIdOld$ /qb! REBOOT=ReallySuppress
 [Winbatch_uninstall_msi]
 msiexec /x $MsiId$ /qb! REBOOT=ReallySuppress
 
+[Winbatch_uninstall]
+"$UninstallProgram$" /sp- /verysilent /norestart
+
 [Files_uninstall]
 ; Example for recursively deleting the installation directory:
 ;

CLIENT_DATA/setup32.ins

@@ -6,6 +6,7 @@
 [Actions]
 requiredWinstVersion >= "4.11.2.6"
 
+DefVar $UninstallProgram$
 DefVar $MsiIdOld$
 DefVar $IniFile$
 DefVar $IniCfgFile$

CLIENT_DATA/uninstall32.ins

@@ -6,6 +6,7 @@
 [Actions]
 requiredWinstVersion >= "4.11.2.6"
 
+DefVar $UninstallProgram$
 DefVar $MsiIdOld$
 DefVar $IniFile$
 DefVar $IniCfgFile$