Script/lint, Lazytox: Fix issue to ignore delete files

[cdce8p]

Description:

git diff now ignores deleted files for pylint.

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#4877

CC: @kellerza

[OttoWinter]

In general, I'm for this fix. But in the lazytox.py script I think we could do better than just ignore deleted files.

Lazytox is supposed to be "intelligent" and automatically run matching tests. For example, deleting homeassistant/components/mqtt/__init__.py would surely invalidate the tests/components/mqtt/test_init.py tests. I think we can do better than that, especially when we have all the awesomeness of python available.

I think a small check in the lint() method for each file would suffice.

# in async def lint(files):
files = [f for f in files if os.path.isfile(f)]

[kellerza]

We already test if files exist for pytest and would be nice to do the same for linting, then it also covers the commandline files and uses those for guessing pytest as Otto mentioned

[kellerza]

🎉

[kellerza]

Would have implemented it slightly different. Where pyfiles is created, print a warning for each non existent file and exclude from pyfiles.
But this will work!

[kellerza]

Scratch that. We need pyfiles in tact for pytest calcs :-)