Remove 'Multi Theft Auto: San Andreas All' registry key in uninstaller

Removes 'Multi Theft Auto: San Andreas All' registry key if 'Common' is the only registry key left.

Author: botder

Shared/installer/NSIS dirs/Include/Utils.nsh

@@ -25,6 +25,24 @@
 !macroend
 
 
+;----------------------------------------
+; Removes a registry key if there is only one subkey with particular name present.
+; IN ROOT_KEY: A root key like HKLM
+; IN GROUP_KEY: Any group key with subkeys
+; IN SUBKEY: Name of the subkey to check against
+;----------------------------------------
+!macro _RemoveRegistryGroupWithSingleKey ROOT_KEY GROUP_KEY SUBKEY
+  Push $0
+    EnumRegKey $0 ${ROOT_KEY} "${GROUP_KEY}" 0
+    StrCmp $0 "${SUBKEY}" 0 +4
+    EnumRegKey $0 ${ROOT_KEY} "${GROUP_KEY}" 1
+    StrCmp $0 "" 0 +2
+    DeleteRegKey ${ROOT_KEY} "${GROUP_KEY}"
+  Pop $0
+!macroend
+!define RemoveRegistryGroupWithSingleKey `!insertmacro _RemoveRegistryGroupWithSingleKey`
+
+
 ;----------------------------------------
 ; In: FILENAME = filename
 ; Out: MAJOR.MINOR.RELEASE.BUILD

Shared/installer/nightly.nsi

@@ -1143,7 +1143,8 @@ Section Uninstall
     DeleteRegKey HKLM "SOFTWARE\Multi Theft Auto: San Andreas ${0.0}"
     DeleteRegKey HKCU "SOFTWARE\Multi Theft Auto: San Andreas ${0.0}"
     DeleteRegKey HKLM "SOFTWARE\Multi Theft Auto: San Andreas All\${0.0}"
-    ; TODO if HKLM "SOFTWARE\Multi Theft Auto: San Andreas All\Common is the only one left, delete it
+    ; Delete "SOFTWARE\Multi Theft Auto: San Andreas All" if "Common" is the only one left.
+    ${RemoveRegistryGroupWithSingleKey} HKLM "SOFTWARE\Multi Theft Auto: San Andreas All" "Common"
 
     ${GameExplorer_RemoveGame} ${GUID}