The latest push of open_pdks (github.com/RTimothyEdwards/open_pdks) has individual python scripts to build libraries for each of the file formats. These are all self-contained. Namely, the ones you want are "create_lef_library.py", "create_spice_library.py", and "create_gds_library.py". Do not use "create_lib_library.py" (unfinished and probably not useful) or "create_verilog_library.py" (will not work with all the complicated sets of files you have, and the definitions and include statements). I am already relying on your own scripts to generate the correct liberty files, and will need to rely on your own scripts to generate the correct verilog library. Probably I will want two of them, black-box and functional.