How to modify janus.pl in packages-swipy library. Do I need to modify the main SWIPL distribution?

General
1

I want to change some of the relations in the janus.pl file in the packages-swipy library.

If I make changed to the Python files in the repo, such as adding debug statements to the query_once method in janus.py, then I can see the impact when I use janus in Python.

However, if I make changes to the janus.pl file, the changes are not reflected in the code. For instance, if I delete everything in janus.pl and I perform query_once(listing(janus:_)), then there is code.

Is janus.pl loaded from SWIPL distribution rather than the packages-swipy library? In other words, do I need to clone the main SWIPL repo (and all submodules), modify it, and build it from source to change janus.pl?

2

Well, there is only one janus.pl and that is in the swipy package. If you clone that outside SWI-Prolog and use it with some installed version of SWI-Prolog it will probably use janus.pl from the swipy package used to create the SWI-Prolog version.

3

That is what I thought, thanks!