[feature request] Windows-2019 support for WSLv1: clarify README on WSLv1 support / point to setup-wsl task for WSLv1 distro installation

[vadimkantorov]

From https://github.com/actions/virtual-environments/blob/main/images/win/Windows2019-Readme.md it is not clear whether WSLv1 or WSLv2 is enabled. Both are useful for testing builds: e.g. Perl5 fails make install step on WSLv1 Perl/perl5#18254, and cperl fails build on case-insensitive mount point on WSLv1 perl11/cperl#424)

[al-cheb]

Hello, @vadimkantorov
Currently, only WSL1[Microsoft-Windows-Subsystem-Linux] is available on Windows Server 2019[10.0.17763 Build 1518] without pre-installed any Linux distro.

[vadimkantorov]

Maybe separate windows-latest-wslv1-ubuntu-latest-like environments would be useful to spare users installing the distro every time, but it can quickly get combinatorial

[al-cheb]

Maybe separate windows-latest-wslv1-ubuntu-latest-like environments would be useful to spare users installing the distro every time, but it can quickly get combinatorial

Sorry, we don't have any plans to change the current infrastructure and provide a separate image for this special case. At the moment, you have got two approaches:

1. Install Ubuntu in runtime, using a task - https://github.com/marketplace/actions/setup-wsl
2. Use your own preconfigured self-hosted runners

[al-cheb]

@vadimkantorov , I have created a tiny #2070 PR with updated wsl version. We can't include info about the setup-wsl task into the documentation file, because we use the same image for Azure PipeLines where the task is not available.

[vadimkantorov]

Thanks for this README fix! Could it also mention that no distro is installed and that needs to be handled separately?

Should I file a separate feature request for providing an official Action (official equivalent of setup-wsl) to install a WSLv1 distro?

[maxim-lobanov]

@vadimkantorov Why do you want to have official equivalent of setup-wsl?
Unfortunately, GitHub can't provide official actions for everything but it provides actions marketplace where everyone can write own action and share it with the world. setup-wsl is good example to show how it works.
If this action suits for you purposes, I suggest continue using it.

[al-cheb]

I am planning close the thread. I'll let you know if there's any change related to WSL.