[stemhist] Integration tests & fixes

[miguelsousa]

No description provided.

[cjchapman]

These are not in the parts you changed, but here, for the record, are the things that concern me most in stemhist.py:
193 -- print statement needs paretheses
205 -- exe_dir undefined
463 -- TTLibErorr undefined
469 -- fontFileName undefined

Since this is going to be replaced by psautohint, I'm going to try not to worry about it too much. 😝

[khaledhosny]

Note that it is still possible to build autohintexe from psautohint repo and use it as a drop-in replacement of the current one, without importing any of the changed Python code. At least in theory, I haven’t tried that in a while. Worth considering as a way to kill autohint earlier with little disruption.

[khaledhosny]

I just tried that and it seems to work with the few fonts I threw on it.

[miguelsousa]

@khaledhosny would you be opposed to including autohintexe in the psautohint wheel, at least for a period of time? Not having to build autohintexe from the afdko repository would allow us to nuke that old source code, and enable a progressive transition. Is this something that you can setup?

[khaledhosny]

No objection, though I don’t know how to that (and the current build system I have for building autohintexe is not the most Windows friendly).

[miguelsousa]

OK. For now I'm going to open an issue to track it.

[miguelsousa]

done https://github.com/adobe-type-tools/psautohint/issues/79