Ensure usage of Python 2.7 for resource.dat building.

Unfortunately, this crap is super fragile. The dependencies of PyGTK,
PyCairo, and rsvg are very pip unfriendly and do not work on Windows or
Debian in a reliable manner at all. Better to just leave this for
@Deledrius.

Sources/Plasma/Apps/plClient/CMakeLists.txt

@@ -18,15 +18,15 @@ if(MOVIE_AVAILABLE)
 endif()
 
 # Test for Python Interpreter, which will be used for extra build scripts if available
-find_package(PythonInterp)
-set_package_properties(PythonInterp PROPERTIES
+find_package(Python2)
+set_package_properties(Python2 PROPERTIES
     URL "http://www.python.org"
     DESCRIPTION "Python Scripting language interpreter"
     TYPE OPTIONAL
     PURPOSE "Used to (re-)build some client resource files"
 )
 
-if(PYTHONINTERP_FOUND)
+if(Python2_Interpreter_FOUND)
     include(FindPythonModule)
     # Test for Python modules needed to build resource.dat
     find_python_module(rsvg)

cmake/FindPythonModule.cmake

@@ -3,7 +3,7 @@
 # From http://ompl.hg.sourceforge.net/hgweb/ompl/ompl/file/tip/CMakeModules/FindPython.cmake
 
 
-if(DEFINED PYTHON_EXECUTABLE)
+if(Python2_Interpreter_FOUND)
 
 function(find_python_module module)
 	string(TOUPPER ${module} module_upper)
@@ -13,7 +13,7 @@ function(find_python_module module)
 		endif()
 		# A module's location is usually a directory, but for binary modules
 		# it's a .so file.
-		execute_process(COMMAND "${PYTHON_EXECUTABLE}" "-c"
+		execute_process(COMMAND "${Python2_EXECUTABLE}" "-c"
 			"import re, ${module}; print re.compile('/__init__.py.*').sub('',${module}.__file__)"
 			RESULT_VARIABLE _${module}_status
 			OUTPUT_VARIABLE _${module}_location
@@ -26,4 +26,4 @@ function(find_python_module module)
 	find_package_handle_standard_args(PY_${module} DEFAULT_MSG PY_${module_upper})
 endfunction(find_python_module)
 
-endif(DEFINED PYTHON_EXECUTABLE)
+endif()