opentype: Missing dependency? about jabbercat

[horazont]

This looks like maybe a version mismatch between pyasn1_modules and pyasn1. Make sure to install both the same way.

[cknoll]

pip install --upgrade pyasn1 (inside the venv) fixed that. It installed version 0.4.2

IMHO The problem was that pyasn1_modules was installed automatically in the venv but pyasn1 was used from the site-packages (version 0.1.9) where it lies around from debian package python3-pyasn1 (installed due to unrelated reasons).

While this is easy to fix I still think this should be handled via install_requires= ... in setup.py of aioxmpp.

[horazont]

I’m not sure what an install_requires can do here? We would have to pin to a specific version of pyasn1 or pyasn1_modules, which I don’t want to.

[cknoll]

What about pyasn1>=0.4like in the case of aiosasl>=0.3?

[horazont]

But we don’t strictly require pyasn1>=0.4. This is a dependency problem with pyasn1_modules, not aioxmpp, if I understand the situation correctly.

FWIW, the other alternative should be to install python3-pyasn1-modules outside the venv.

[cknoll]

Hmm. You are right. Someone should open an issue there.

Nevertheless there is the pragmatic view: fixing that dependency might prevent problems for other testers leaving more time and motivation for actual testing of jabbercat.

[horazont]

I’ll leave a note in the testing guide.

I also think that this might be due to pip not ensuring that dependencies w.r.t. --system-site-packages are actually fulfilled, instead of a missing dependency declaration at pyasn1_modules.

At which point the question is whether:

1. simplify the testing process by removing --system-site-packages, with the downside that people will install things like PyOpenSSL into a venv, or
2. add another note to guide people on what to do…

[cknoll]

I think the cleanest way is what you mentioned above:

install python3-pyasn1-modules outside the venv.

I tried it:

1. uninstalled pyasn1 and pyasn1_modules via pip in the venv,
2. installed python3-pyasn1-modules via apt)

→ jabbercat does start.

This would mean to add some additional dependencies to the guide but no extra prosa notes which are tedious to process.