Add: [CI] Test grf generation (#11543)

.github/workflows/ci-build.yml

@@ -93,6 +93,7 @@ jobs:
         - name: GCC - Dedicated
           compiler: gcc
           cxxcompiler: g++
+          libraries: grfcodec
           extra-cmake-parameters: -DOPTION_DEDICATED=ON -DCMAKE_CXX_FLAGS_INIT="-DRANDOM_DEBUG" -DCMAKE_DISABLE_PRECOMPILE_HEADERS=ON
           # Compile without SDL / SDL2, as that should compile fine too.
 
@@ -170,6 +171,9 @@ jobs:
         cd build
         ctest -j $(nproc) --timeout 120
 
+        # Check no tracked files have been modified
+        git diff --exit-code
+
   macos:
     strategy:
       fail-fast: false

cmake/scripts/CreateGRF.cmake

@@ -21,6 +21,9 @@ if(NOT GRF_BINARY_FILE)
     message(FATAL_ERROR "Script needs GRF_BINARY_FILE defined")
 endif()
 
+# Remove the existing output so failures never go unnoticed
+file(REMOVE ${GRF_BINARY_FILE} ${GRF_BINARY_FILE}.hash)
+
 get_filename_component(GRF_SOURCE_FOLDER_NAME "${GRF_SOURCE_FOLDER}" NAME)
 
 file(WRITE sprites/${GRF_SOURCE_FOLDER_NAME}.nfo "")