Set version_info/version in install_as_pycairo

[lazka]

I'm playing around with matplotlib atm, which uses version_info and version to check if the installed pycairo is recent enough.

I suggest adding something like this in install_as_pycairo():

globals()["version_info"] = (1, 10, 0)
globals()["version"] = "1.10.0"

[SimonSapin]

Hi. Thanks for the bug report. I just made a change, does it fix the issue for you? (Please try the git version.)

[SimonSapin]

Well, that sucks. I put the cairocffi version number in there but matplotlib probably does comparison with some known pycairo version, so it's not gonna work.

Ideally they should really do feature detection rather than version detection. Do you have some idea of what features/versions they expect? Maybe try raising an issue on matplotlib?

I'd rather not make up a "pycairo-equivalent" version number. It would make sense: the feature set of pycairo and cairocffi are neither quite a subset of the other.

[lazka]

No, doesn't work. It expects (1, 2, 0) (it should be tuple of ints, not a list of strings btw).

What do you think about installing a proxy module in install_as_pycairo? http://bpaste.net/show/D5IoxyppXA6LgKvRXqfO/

[SimonSapin]

OK, try this now. I don't really like where this is going but I changed it to 1.10.0 and tuple-of-ints as you suggested. I'm not sure a module proxy would really help.

TODO for me: document this.

[lazka]

Thanks.

[SimonSapin]

I take it this resolved the issue with Matplotlib?

[lazka]

Yes.

[anntzer]

fwiw I'm going to bump mpl's min pycairo version to 1.11.0 and make the check only happen for pycairo, not cairocffi, so this hack may be removed (once mpl is fixed)...