Document how to configure setup-python on a self hosted runner about setup-python

[konradpabjan]

I've added Docs on how to configure setup-python on a self hosted runner. actions/runner-images#275

Sometime around mid-January we did a major overhaul in terms of how Python gets installed on our images. All the versions of Python that we use for our VMS now get released as NPM packages that can be found here: https://github.com/actions/virtual-environments-packages

Before these NPM packages it was pretty painful, but now it's a matter of setting up a few env variables + running npm install

[Ikana]

I'm running self hosted runners on AWS, I've been trying to install the tooling from this repo into our runners, but no luck yet, would that be the correct approach? I would be happy to write the documentation for this one I get it working.

[r-chris]

There is some basic info about the cache here: https://github.com/marketplace/actions/setup-python-environment#hosted-tool-cache

Would this script: https://github.com/actions/virtual-environments/blob/master/images/linux/scripts/installers/1804/hosted-tool-cache.sh be the one to setup the runner cache?

It would be very helpful to get an idea of how to do that in our self-hosted virtual machines.

[oberstet]

I've added Docs on how to configure setup-python on a self hosted runner.

Mmh, ok, sounds good, thanks, but where are the docs? Can't find it ..

The link points to a closed issue relating to TK. I have searched for docs. The only reference in https://github.com/actions/virtual-environments/blob/main/README.md points to https://docs.github.com/en/free-pro-team@latest/actions/hosting-your-own-runners - but that does not talk about Python at all.

So how do I configure Python (eg CPython 3.8 vs PyPy 3.7 available on a self-hosted runner) so that the CI job run will be done in a newly created virtual env?

[ckingbailey]

@oberstet I dug around and found this https://github.com/actions/setup-python#using-setup-python-with-a-self-hosted-runner