Odoo 13 not installing requirements.txt

[yaazkal]

Documenting this just for the record. Note that Odoo 13 and previous versions are deprecated. Can happen that some of their requirements are not used anymore or even not compatible with current pip version or other tools.

Odoo 13 know issues:

1. pip does not install requirements.txt
   It shows an error like error in vatnumber setup command: use_2to3 is invalid.

Try using an older setuptools version, so from the host:

# bastille cmd TARGET pip install setuptools==57

If that gives more errors, then remove, install vatnumber and install again setuptools (newer version).

# bastille cmd TARGET pip uninstall setuptools
# Bastille cmd TARGET pip install vatnumber
# bastille cmd TARGET pip install setuptools