Look in child dirs when discovering django project

[voidus]

Hi! 👋
In a lot of projects I work on, the django project is in a src subfolder of the repository. :fol
These changes allow pytest-django to discover the project when pytest is run from the root folder of the repository.

While reading the code, I discovered that py is in maintenance mode, so I replaced it with pathlib, which is in the standard library.

What do you think about these changes?

PS:
I tried to run tox locally, but there were some errors regarding the postgres database. Running one using Docker didn't work either. I also had a little trouble understanding how the django-project-directory-discovery is tested in general, if you feel like this feature deserves a test, please give me some pointers on how to do it.

[codecov-io]

Codecov Report

Merging #586 into master will decrease coverage by 0.08%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master     #586      +/-   ##
==========================================
- Coverage   91.92%   91.84%   -0.09%     
==========================================
  Files          33       33              
  Lines        1660     1667       +7     
  Branches      143      148       +5     
==========================================
+ Hits         1526     1531       +5     
  Misses         95       95              
- Partials       39       41       +2

Flag	Coverage Δ
#dj110	83.86% <85.71%> (-0.06%)	⬇️
#dj111	86.02% <85.71%> (-0.07%)	⬇️
#dj18	84.7% <85.71%> (-0.06%)	⬇️
#dj19	83.74% <85.71%> (-0.06%)	⬇️
#dj20	84.16% <85.71%> (-0.06%)	⬇️
#djmaster	84.16% <85.71%> (-0.06%)	⬇️
#mysql_innodb	84.16% <85.71%> (-0.06%)	⬇️
#mysql_myisam	84.1% <85.71%> (-0.06%)	⬇️
#postgres	87.52% <85.71%> (-0.07%)	⬇️
#py27	89.14% <85.71%> (-0.08%)	⬇️
#py34	83.74% <85.71%> (-0.06%)	⬇️
#py35	83.86% <85.71%> (-0.06%)	⬇️
#py36	84.64% <85.71%> (-0.06%)	⬇️
#sqlite	85.9% <85.71%> (-0.07%)	⬇️
#sqlite_file	83.74% <85.71%> (-0.06%)	⬇️

Impacted Files	Coverage Δ
tests/conftest.py	100% <100%> (ø)	⬆️
pytest_django/plugin.py	85.42% <82.6%> (-0.34%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e0f59db...1cdb622. Read the comment docs.

[blueyed]

I'm -0 on this: I do not like too much magic, which also means overhead - but have this feature altogether disabled for my projects usually anyway.

[voidus]

@blueyed Assuming you agree to the code in the first commit, the new functionality is contained in two lines of code, and imo this change makes the auto-discovery much more useful. If you don't like the new feature, I would still suggest the first commit to be included.

Is there anything I can do to move this discussion forward?

[blueyed]

Moved the first commit to #631.

[blueyed]

#631 has been merged.

[blueyed]

btw: #478 - it uses testpaths.

[blueyed]

Closing for now.