Avoid sсan of non-project code (eg. site-packages libs)

[hayorov]

Hi there,

I got an issue running

pytest --dead-fixtures -v --dup-fixtures 
============================================================================= test session starts ==============================================================================
platform linux -- Python 3.6.6, pytest-3.8.1, py-1.6.0, pluggy-0.7.1 -- /usr/bin/python3.6
cachedir: .pytest_cache
Using --randomly-seed=1538054705
Django settings: server.settings (from ini file)
rootdir: /app, inifile: setup.cfg
plugins: xdist-1.23.1, randomly-1.2.3, picked-0.3.0, isort-0.2.1, forked-0.2, flake8-1.0.2, django-3.4.3, deadfixtures-2.0.1, cov-2.6.0
[gw0] linux Python 3.6.6 cwd: /app
[gw1] linux Python 3.6.6 cwd: /app
[gw2] linux Python 3.6.6 cwd: /app
[gw3] linux Python 3.6.6 cwd: /app
collected 102 items

Hey there, I believe the following fixture(s) are not being used:
Fixture name: worker_id, location: /usr/local/lib/python3.6/dist-packages/xdist/plugin.py:194
    Return the id of the current worker ('gw0', 'gw1', etc) or 'master'
    if running on the master node.

How to skip/avoid scanning dist-packages and etc.

Tried:

• pytest --dead-fixtures -v --dup-fixtures --ignore=/usr/local/lib/python3.6/dist-packages
• add to setup.cfg

 [tool:pytest] 
norecursedirs = dist-packages /usr/local/lib/python3.6/dist-packages/

nothing helped.

[jllorencetti]

Thanks for reporting @hayorov :)