By splitting it into two different packages you end up with the same situation that currently plagues psycopg2/psycopg2-binary whereby if you depend on psycopg2 you can't easily swap in psycopg2-binary and vice-versa as the two don't satisfy the same dependency.
Number 3 is kind of what sqlalchemy does, and then provide wheels for a huge variety of platforms to allow people to install the package without needing a compiler themselves. Bert > On Aug 2, 2020, at 04:42, Daniele Varrazzo <daniele.varra...@gmail.com> wrote: > > Hello, > > packaging psycopg3, I'm wondering what is the best way to provide an > optional optimisation module. > > 1) provide a separate psycopg3-c distribution > 2) provide an extra psycopg3[c] > 3) try building the extension and fail quietly. > > 1) seems the cleanest approach: the psycopg3 distribution would have > no build-time external dependency (Cython, -dev packages, a compiler) > and psycopg3-c can fail hard if some of these dependencies are > missing. I am currently trying this approach, finding some problems in > working out a good files layout to have two setup.py in the same git > repository. > > 2) would be nice but I don't see a way to identify the extra requested > at build time to implement a build_ext command such that if "c" is not > the extra then don't do anything. it seems that extra are thought for > a different use case, not for optional build-time parts > > 3) would give me endless headaches to work out why something failed, > differentiate failures for missing dependencies from real errors, and > dealing with user reports. > > What would be your advice? Press on with 1 or a different approach? > Examples are welcome (the only one I have in mind is PyYAML doing 3). > > > -- Daniele > -- > Distutils-SIG mailing list -- distutils-sig@python.org > To unsubscribe send an email to distutils-sig-le...@python.org > https://mail.python.org/mailman3/lists/distutils-sig.python.org/ > Message archived at > https://mail.python.org/archives/list/distutils-sig@python.org/message/GEPU27VYHQ54BSAYDAK7ZPBFXAMVJIII/ -- Distutils-SIG mailing list -- distutils-sig@python.org To unsubscribe send an email to distutils-sig-le...@python.org https://mail.python.org/mailman3/lists/distutils-sig.python.org/ Message archived at https://mail.python.org/archives/list/distutils-sig@python.org/message/4YQOQ3EBKZE243ZZYWFGCB3TJCQDQJMX/
