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I am USing cmake 3.14, and part of the script it's calling another python script and giving it the build path as an argument but the python doesn't receive this argument

set(arg ${CMAKE_BINARY_DIR})    
add_custom_command(TARGET res POST_BUILD
  COMMAND ${PYTHON_TEST}  ${CMAKE_BINARY_DIR}/../script.py ${arg}
  DEPENDS ${arg}
  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
  COMMENT "Generating results"
             )

python log :

Traceback (most recent call last):
File "script.py", line 8, in <module>
BuildPath = sys.argv[1]
IndexError: list index out of range

of course the python script is running ok if called from CMD .. when i looked on the cmake documentation it says it's ignoring the arguments indeed but i didn't understand what's to be done to pass arguments?

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    What's stored in PYTHON_TEST? What does the message("COMMAND ${PYTHON_TEST} ${CMAKE_BINARY_DIR}/../script.py ${arg}") command print, if inserted directly befor the add_custom_command? What's the command cmake --build ... --verbose prints? Commented Aug 10, 2023 at 17:10
  • Note also, that TARGET flow of the add_custom_command doesn't support DEPENDS keyword. You won't find that keyword in the documentation for that command flow. Commented Aug 13, 2023 at 13:54
  • @fabian PYTHON_TEST is python.exe .... and this command prints (pathToPython/python.exe PathToScript/script.py arg) exactly as i want Commented Aug 21, 2023 at 22:34
  • @Tsyvarev actually it supports DEPENDS in this documentation Commented Aug 21, 2023 at 22:40
  • @mr.Arrow: No, it doesn't. You use "Build Events" subtype of the command. If you look into the command signature for that subtype, you won't find DEPENDS in it. Commented Aug 21, 2023 at 23:19
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