CMake: check return code of python scripts

CMakeLists.txt

@@ -272,7 +272,11 @@ if(ENABLE_EMBEDDED_PCIIDS AND NOT EXISTS "${PROJECT_BINARY_DIR}/fastfetch_pciids
     if(Python_FOUND)
         message(STATUS "Generating 'fastfetch_pciids.c.inc'")
         execute_process(COMMAND ${Python_EXECUTABLE} "${CMAKE_CURRENT_SOURCE_DIR}/scripts/gen-pciids.py"
-                        OUTPUT_FILE "${PROJECT_BINARY_DIR}/fastfetch_pciids.c.inc")
+                        OUTPUT_FILE "${PROJECT_BINARY_DIR}/fastfetch_pciids.c.inc"
+                        RESULT_VARIABLE PYTHON_PCIIDS_RETCODE)
+        if(NOT PYTHON_PCIIDS_RETCODE EQUAL 0)
+            message(FATAL_ERROR "Failed to generate 'fastfetch_pciids.c.inc'")
+        endif()
     else()
         message(WARNING "Python3 is not found, 'fastfetch_pciids.c.inc' will not be generated")
         set(ENABLE_EMBEDDED_PCIIDS OFF)
@@ -282,7 +286,11 @@ endif()
 if(Python_FOUND)
     message(STATUS "Generating 'fastfetch.1'")
     execute_process(COMMAND ${Python_EXECUTABLE} "${CMAKE_CURRENT_SOURCE_DIR}/scripts/gen-man.py"
-                    OUTPUT_FILE "${PROJECT_BINARY_DIR}/fastfetch.1")
+                    OUTPUT_FILE "${PROJECT_BINARY_DIR}/fastfetch.1"
+                    RESULT_VARIABLE PYTHON_MANPAGE_RETCODE)
+        if(NOT PYTHON_MANPAGE_RETCODE EQUAL 0)
+            message(FATAL_ERROR "Failed to generate 'fastfetch.1'")
+        endif()
 else()
     message(WARNING "Python3 is not found, use basic 'fastfetch.1.in' instead")
     string(TIMESTAMP FASTFETCH_BUILD_DATE "%d %B %Y" UTC)