How pip recognize to create wheel for a package

Question

How pip decide to run setup.py bdist_wheel againest legacy setup.py install on a package?

Answer 1

I think it is described somewhere! but I dont know exacly where. maybe in one PEP.

The main check of whether to create a wheel or not is in https://github.com/pypa/pip/blob/develop/pip/wheel.py#L773

the pip.index.egg_info_matches checks basename of your package with r'([a-z0-9_.]+)-([a-z0-9_.!+-]+)'. That means setup.py containing folder name must be in form of mypackage-anything in first place! otherwise the above check will fail and the legacy installation will starts.