tests/example/: Remove environment hack

Now that tests are no longer scanned for recursively, the hack of passing values
back and forth via the environment is no longer needed and can be removed.

While at it, this also exchanges the "useless use of regex" for an explicit
string replacement.

Signed-off-by: Uli Schlachter <psychon@znc.in>

tests/examples/CMakeLists.txt

@@ -240,24 +240,10 @@ foreach(file ${test_files})
         # Anything called @DOC_`namespace`_EXAMPLE@
         # in the Lua or C sources will be replaced by the content if that
         # variable during the pre-processing
-        set(ENV{${TEST_NAME}} "${ESCAPED_CODE_EXAMPLE}" CACHE INTERNAL FORCE)
-
-        # Update the test list
-        set(ENV{EXAMPLE_LIST} "$ENV{EXAMPLE_LIST};${TEST_NAME}")
+        # While at it, replace \" created by CMake by ', &quot; wont work in <code>
+        string(REPLACE "\"" "'" ${TEST_NAME} ${ESCAPED_CODE_EXAMPLE})
 
     endif()
 endforeach()
 
-# This is ugly, but CMake variable scope system totally ignore 50 years of
-# computer science evolution and only support function local variables.
-# PARENT_SCOPE is useless in recursive methods and the CMake pre-processor
-# can't access ENV variables. So the only (insane) way is to set tons of ENV
-# variables, keep track of them in yet another one and set them in the global
-# scope once in the "top level" CMakeLists section (it cannot be done from
-# functions).
-foreach(vari $ENV{EXAMPLE_LIST})
-    # While at it, replace \" created by CMake by ', &quot; wont work in <code>
-    string(REGEX REPLACE "\\\"" "'" ${vari} $ENV{${vari}})
-endforeach()
-
 message(STATUS "All test passed!")