Publish into the running instance the WSL version

[lucasvc]

From the PowerShell/cmd line you can check which WSL version is each of the installed distros you have:

wsl -l -v

Unfortunatelly, windows is not publishing into the running instance which is the WSL version running, neither they indicate how to obtain that information from the running shell (question on superuser with some unofficial options).

Could it be possible to add this version value from the Launcher retrieved previous start?

[yuk7]

You can get WSL version (1 or 2) of instance:
Launcher.exe get --wsl-version

[lucasvc]

I meant to retrieve the version from the running Linux.

As I pointed in the question (made by myself) there is a not clear environment variable and the Kernel uname options, but none are official nor reliable.

So I don't know if Launcher can add environment variables before starting the WSL command line, adding that --wsl-version in a new environment variable named WSL_VERSION or similar.

If my C knowledge would not be so rusty I could set a PR, sorry :(

[yuk7]

ah, sorry, I understood.
You are right.
Guessing the WSL version from uname is not accurate.

Now, we don't provide wsl version information to environment variable.

[yuk7]

I think it is difficult to provide that function.
Users don't always launch using our launcher.

[lucasvc]

Users don't always launch using our launcher.

Yes, ideally should be that Microsoft provides it (I probably will open an issue later).
Or you mean that not everyone that has the Launcher use it as "executable" and they use the wsl command?

UPDATE: SuperUser question has a good workaround, so feel free to close this.