Add an RFC about providing an official WSL image

Add an RFC that defines specifications about providing an official WSL Arch Linux image.

This overall topic has already been discussed and mostly hashed out in the related mail thread in the Arch-Dev-Public mailing list.

As a context reminder, this proposal was initially inspired by the related Fedora one and motivated by the fact that a lot of people (like myself) have no other choice than using Windows on their company's workstation (due to internal policy) and for whom WSL is their workaround to access / work with a Linux environment. While there are unofficial WSL images available for Arch Linux, it's fair to say that their overall quality or their development state vary.

See the rendered version.

Signed-off-by: Robin Candau antiz@archlinux.org

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Due to required policies & TOS agreements and the concerns they raise around the implied permission of our trademark usage, we do not intend to distribute this image through the Microsoft Store.

Thanks for this. We should avoid getting into any legal agreements with Microsoft.

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Tiny formatting and wording suggestions. Otherwise solid and well written, thank you for putting in the work to get this going.

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One extra thing I mentioned in person to consider is the kernel version that WSL2 uses; it's relevant to Arch in terms of the minimum kernel version allowed. (we are currently very non-specific/liberal; e.g. the docker image might be run on a very old kernel!)

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I think it is important to note the unoffical Arch WSL that exists (and is in the Windows store using Arch trademarks...)

https://apps.microsoft.com/detail/9mznmnksm73x?hl=en-US&gl=US

https://github.com/yuk7/ArchWSL

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I just tried the WSL image from antiz/archlinux-wsl.

WSL2 has a lot of weird idiosyncrasies.

• /etc/environment is not loaded: https://github.com/microsoft/WSL/issues/1405
• Wayland and X11 require symlinks after boot: antiz/archlinux-wsl#2
• a bunch or other issues like fractional scaling, mesa using d3d12

None of these are documented in the ArchWiki, probably since it's not official. If this were accepted and implemented, would WSL2-specific information be allowed in the ArchWiki?

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