I'm setting up Renovate to run as a github action in a Github Enterprise environment.
And as it's my first time doing it this way, I've set the LOG_LEVEL variable to debug to get all the issues I have to solve.
With that setup, the logs got pretty anoying to read due to the ansi color codes used.

So I did some googling and it seems the industry standard is to set the NO_COLOR environment variable to true or 1.
I did try that, but nothing changed.

So I tested with renovate cli locally and all color was gone from the stdin when I set this environment variable.

Digging a bit further, I found the "env-regex" input.
Following the example from the README.md, I found I had to take a copy of the default env-regex setting:
^(?:RENOVATE_\\w+|LOG_LEVEL|GITHUB_COM_TOKEN|NODE_OPTIONS|(?:HTTPS?|NO)_PROXY|(?:https?|no)_proxy)$
and add my "NO_COLOR" to that.
^(?:RENOVATE_\\w+|LOG_LEVEL|GITHUB_COM_TOKEN|NODE_OPTIONS|NO_COLOR|(?:HTTPS?|NO)_PROXY|(?:https?|no)_proxy)$

This worked like a charm, and now I could see the logs with no color coding.

This got me thinking that since "NO_COLOR" seems to be some kind of industry standard for this and renovate cli supports it, it would probably be nice for others to have this out of the box.