[PATCH 2/2] bindings/python-cffi: update version from global version.

[Floris Bruynooghe]

On Thu 25 Jun 2020 at 10:34 -0300, David Bremner wrote:

> David Bremner <david at tethera.net> writes:
>
>> Copy machinery from the older python bindings
>
>>  
>> +# get the notmuch version number without importing the notmuch module
>> +version_file = os.path.join(os.path.dirname(__file__),
>> +                            'notmuch2', 'version.py')
>> +exec(compile(open(version_file).read(), version_file, 'exec'))
>> +assert '__VERSION__' in globals(), \
>> +    'Failed to read the notmuch binding version number'
>
> I wrote a cover letter for this, but that seems to have gotten lost. My
> main point was I'm not sure why this is better than Floris's version,
> since they both read a file when setup.py is run. I don't understand (or
> use) pip, so someone else will have to figure this out. If the
> constraint is that the version has to be hardcoded in setup.py then (as
> much as that sounds like a design mistake), we can apply similar sed
> hackery directly to setup.py. Perhaps someone can remember why we didn't
> do that for the old python bindings.

For some reason this is the only mail in this thread I have, so I don't
actually know the patch.

I think it can be simpler though, is it possible to copy the toplevel
version file into bindings/python-cffi/version in the part of the build
that would otherwise do the sed magic?  Then setup.py only needs to look
for the version file in the same directory as itself instead of finding
the toplevel of the repo.