[RF] Move RooFit pythonizations to roofit and make them pip installable #16608
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This change is improving the development workflow, now how users are getting ROOT and RooFit!
This will help with more modular RooFit builds, and it's also a big step
towards making the RooFit developer experience for the pythonizations
more pleasant.
The goal is that people can contribute to the RooFit pythonizations
without having to interact with any CMake or C++ compilation, which was
requested by our power users.
Testing changes to the pythonizations is easy now, because they can be
installed easily with pip on top of an existing ROOT install, in which
case this install will override the RooFit pythonizations shipped with
ROOT.
This makes developing the pythonizations much easier!
A README is added to
roofit/pythonizations
that outlines the steps as follows:Therefore, the easiest and recommended way to develop RooFit pythonizations is as follows:
roofit/pythonizations
directorypip install -e .
for an editable install (virtual environment recommended)