Add tde_setup_polkit macro.

This resolves issue #21.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

modules/TDEMacros.cmake

@@ -2091,6 +2091,51 @@ macro( tde_setup_dbus )
 endmacro( )
 
 
+#################################################
+#####
+##### tde_setup_polkit
+
+macro( tde_setup_polkit )
+  if( NOT POLKIT_GOBJECT_FOUND )
+    pkg_search_module( POLKIT_GOBJECT polkit-gobject-1 )
+    if( NOT POLKIT_GOBJECT_FOUND )
+      tde_message_fatal( "polkit-gobject-1 is required, but not found on your system" )
+    endif( )
+  endif( )
+
+  foreach( _arg ${ARGV} )
+    if( NOT "${_arg}" MATCHES "^polkit-" )
+      set( _arg "polkit-${_arg}" )
+    endif( )
+    string( TOUPPER "${_arg}" _polkit_module )
+    if( "${_polkit_module}" MATCHES "-[0-9]+$" )
+      string( REGEX REPLACE "-[0-9]+$" "" _polkit_module "${_polkit_module}" )
+    endif( )
+    string( REPLACE "-" "_" _polkit_module "${_polkit_module}" )
+    if( NOT "${_arg}" MATCHES "-[0-9]+$" )
+      set( _arg "${_arg}-1" )
+    endif( )
+    if( NOT ${_polkit_module}_FOUND )
+      pkg_search_module( ${_polkit_module} ${_arg} )
+      if( NOT ${_polkit_module}_FOUND )
+        tde_message_fatal( "${_arg} is required, but not found on your system" )
+      endif( )
+    endif( )
+  endforeach( )
+
+  if( NOT DEFINED POLKIT_ACTIONS_DIRECTORY )
+    execute_process(
+      COMMAND ${PKG_CONFIG_EXECUTABLE}
+        polkit-gobject-1 --variable=actiondir
+      OUTPUT_VARIABLE POLKIT_ACTIONS_DIRECTORY
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+    message( STATUS "Using " ${POLKIT_ACTIONS_DIRECTORY} " for PolicyKit action files" )
+  endif( )
+
+endmacro( )
+
+
 ################################################
 #####
 ##### Restore CMP0026 policy