Use WixNetFxExtension to detect installed .NET

This implements the use of the WixNetFxExtension for the WIX toolset, to
detect the installed .NET Framework version. If the installed .NET
version is lower than 4.6 the installation process will terminate with
the note to install at least .NET Framework 4.6.

refs #7090

CMakeLists.txt

@@ -414,11 +414,11 @@ set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_BINARY_DIR}/LICENSE.txt")
 set(CPACK_PACKAGE_EXECUTABLES "Icinga2SetupAgent;Icinga 2 Agent Wizard")
 set(CPACK_WIX_PRODUCT_ICON "${CMAKE_CURRENT_SOURCE_DIR}/icinga-app\\\\icinga.ico")
 set(CPACK_WIX_UPGRADE_GUID "52F2BEAA-4DF0-4C3E-ABDC-C0F61DE4DF8A")
-set(CPACK_WIX_EXTENSIONS "WixUtilExtension")
 set(CPACK_WIX_UI_BANNER "${CMAKE_CURRENT_SOURCE_DIR}/icinga-installer/bannrbmp.bmp")
 set(CPACK_WIX_UI_DIALOG "${CMAKE_CURRENT_SOURCE_DIR}/icinga-installer/dlgbmp.bmp")
 set(CPACK_WIX_PATCH_FILE "${CMAKE_CURRENT_BINARY_DIR}/icinga-installer/icinga2.wixpatch.Debug")
 set(CPACK_WIX_PATCH_FILE "${CMAKE_CURRENT_BINARY_DIR}/icinga-installer/icinga2.wixpatch")
+set(CPACK_WIX_EXTENSIONS "WixUtilExtension" "WixNetFxExtension")
 
 set(CMAKE_INSTALL_SYSTEM_RUNTIME_DESTINATION "sbin")
 set(CMAKE_INSTALL_UCRT_LIBRARIES TRUE)

icinga-installer/icinga2.wixpatch.cmake

@@ -3,6 +3,11 @@
     <Property Id="ALLUSERS">1</Property>
     <Property Id="MSIRESTARTMANAGERCONTROL">Disable</Property>
 
+    <PropertyRef Id="WIX_IS_NETFRAMEWORK_46_OR_LATER_INSTALLED" />
+    <Condition Message='This application requires .NET Framework 4.6 or higher. Please install the .NET Framework then run this installer again.'>
+      <![CDATA[Installed OR WIX_IS_NETFRAMEWORK_46_OR_LATER_INSTALLED]]>
+    </Condition>
+
     <CustomAction Id="XtraUpgradeNSIS" BinaryKey="icinga2_installer" ExeCommand="upgrade-nsis" Execute="deferred" Impersonate="no" />
     <CustomAction Id="XtraInstall" FileKey="CM_FP_sbin.icinga2_installer.exe" ExeCommand="install" Execute="deferred" Impersonate="no" />
     <CustomAction Id="XtraUninstall" FileKey="CM_FP_sbin.icinga2_installer.exe" ExeCommand="uninstall" Execute="deferred" Impersonate="no" />