Gating network behind compile flag

tools/run_python/CMakeLists.txt

@@ -4,11 +4,16 @@
 # https://opensource.org/licenses/MIT
 
 function(dusk_run_python CMAKE_TARGET_NAME PYTHON_MODULE)
+  cmake_parse_arguments(DUSK_RUN_PYTHON "" "OUTPUT" "DEPENDS;ARGS" ${ARGN})
   find_package(Python3 COMPONENTS Interpreter REQUIRED)
 
-  add_custom_target(${CMAKE_TARGET_NAME} ALL
+  add_custom_command(
+    OUTPUT ${DUSK_RUN_PYTHON_OUTPUT}
     WORKING_DIRECTORY ${DUSK_ROOT_DIR}
     COMMAND
-      ${Python3_EXECUTABLE} -m ${PYTHON_MODULE} ${ARGN}
+      ${Python3_EXECUTABLE} -m ${PYTHON_MODULE} ${DUSK_RUN_PYTHON_ARGS}
+    DEPENDS ${DUSK_RUN_PYTHON_DEPENDS}
+    VERBATIM
   )
+  add_custom_target(${CMAKE_TARGET_NAME} DEPENDS ${DUSK_RUN_PYTHON_OUTPUT})
 endfunction()