Add python script to CMakeLists.txt

Question

I've to use 1 command : python <somepythonscript.py> <input_file_path> > <output_file_path>
somepythonscript.py => It's a python script which takes a file as an input, processes it & generates an output file.
Now, I've to add this command into my CMakeLists.txt so that whenever I make, this script will be invoked via command & I can get the generated output file also.

Answer 1

You can use the FindPython module in combination with add_custom_command

find_package(Python REQUIRED COMPONENTS Interpreter)

add_custom_command(
    OUTPUT <output_path>
    COMMAND ${Python_EXECUTABLE} <somepythonscript.py> <input_file_path> <output_file_path>
    DEPENDS <somepythonscript.py> <input_file_path>
)

For the file to be generated though, you need to add it as dependency somewhere, e.g. by listing it as source of a target.

If you are sure the file doesn't need to be regenerated, you can use execute_process instead of add_custom_command