I want to share an only warehouse among several companies (multi-company). Let's say between A and B companies.

I've read a lot of posts which say that it is a non-legal scenario, but in fact there are a lot of companies which work that way and ask for that requirement.

I guess Odoo does not have an officlal module or configuration to do that. Do you know any 3rd party modules?

If not, any ideas of how to configure or develop that? I've tried to allow leaving the company_id field empty in a warehouse, and modify a lot of rules and other company_id fields in several models, but that's crazy, I never will finish it since the more I modify, the more Odoo complains about more and more models and rules.

My other idea is to generate a "duplicated" warehouse in the company B which repeats all the ORM actions made in the warehouse of the company A. But this implies to duplicate locations, operation types, etc... and I do not know how many more models will I have to replicate...

Any better ideas?