Mutter as an alternative to xvfb

[HannesWell]

When migrating to this action a discussion about mutter as an alternative to xvfb came up:
eclipse-m2e/m2e-core#1344 (comment)

The main reasoning was that mutter would be the preferred way compared to xvfb and xvfb seems to be not as actively maintained as mutter. Can you share your assessment about that?

Would it be interesting for you to provide a similar action like this one, but for mutter? For example setup-mutter?

[ssbarnea]

Apparently mutter does not exist on macos, so until it appears there, the idea of switching to mutter is not viable. After that, i would not mind.

[vrubezhny]

@ssbarnea As far as I see xvfb gets installed and executed ONLY when running under ubuntu, for other platforms the provided command is executed without xvfb. So, I believe, it's possible to make a similar GH Action for mutter doing the same approach (run with mutter wherever it's available, or skip mutter-wrapping wherever it's not)