Add options to disable runner updates

[kuhnroyal]

Description

Disable automatic updates of the Github runner

Motivation and Context

Closes #107

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[simonbs]

Thanks for the PR! The changes look great. One thing I wonder about, though, is whether we should add some explanatory text in the UI to clarify what this setting does. Even with this enabled, new versions of the runner will still be downloaded when the VM reboots, as it always fetches the latest version at that point. I worry that "Disable runner auto-update" might be misleading.

What do you think?

[kuhnroyal]

Damn, I didn't think about that...
What about a runner version configuration option? If that is set, we disable updates and always install that version?

[simonbs]

@kuhnroyal If all you're interested in is making sure Tartelet never updates the runner, even between reboots of the virtual machine, then you should edit the virtual machine, copy in the runner archive, and extract it. This part of the shell script ensures that the runner script is only downloaded if ~/actions-runner doesn't exist.

[kuhnroyal]

That's actually a good idea, will check if I can adapt my build.

[kuhnroyal]

Ok, I have a preinstalled runner version and it automatically updates when the runner launches.
So I am back to the idea of this PR.
I will add a description in the UI.

[kuhnroyal]

Added a description:

[kuhnroyal]

I couldn't test the config.sh changes since I can't get Tartelet to save my PEM key, everything else is being saved...

[simonbs]

@kuhnroyal Thanks for adding the texts.

I couldn't test the config.sh changes since I can't get Tartelet to save my PEM key, everything else is being saved...

Have you looked at the comments in #2 and #86? Both issues describe similar problems with proposed workarounds.