Fix virtualenvs after a python update.
Looks for repositories in places configurable in a ~/.venvs.conf config file.
Uses only standard library modules to be able to run it outside any virtualenv.
Note while this is public, it's just a quick hack.
Config structure will probably change.
[DEFAULT]
verbose = no
dry_run = no
[.emacs.d/elpy/rpc-venv]
[~/code/.venv]
[work/coolproject/venv]
[~/.local/share/virtualenvs]
collection = true