[fix] find HOME value when abstent using os.path.expanduser

[Psycojoker]

Hello,

This fix might appear in a weird context for you, the situation is:

• using pudb
• via pytest-pudb
• while calling pytest via tox
• the configuration will be ignored because: pytest won't pass down the $HOME variable by default
• thus you end up having to redo your configuration at every startup (which can be a dozen times per day)
• thus this is very annoying and and this is actually extremely not intuitive to debug (like I've spent a few hours in the source code)

So to handle this situation I'm using the os.path.expanduser("~") way to still get the user's home (maybe there's a better way?)

But to be honest I'm not sure where this need to be fixed?

You can do this in every tox file but it's a bit annoying to modify it only for debugging:

[testenv]
setenv =
  HOME={homedir}

Or maybe it should be fixed in pytest-pudb?

Or maybe directly in pudb because this will be a broader fix for more people?

I'm not sure

Nevertheless thanks a lot for this debugger, it really help me a lot!

Kind regards,

[inducer]

Thanks for your contribution, and for the thorough explanation! What you describe makes sense to me, and I'm happy to accommodate the use case. I added a comment from the code back to this PR so that the rationale for the slightly weird-looking code sticks around. (5ae6579)

[Psycojoker]

Thanks for the quick merge!