Fast way to obtain the version of current WSL instance

[CarterLi]

Is your feature request related to a problem? Please describe.

I want to find a fast way to detect the current version of WSL for my project fastfetch.

Describe the solution you'd like

I suggest that wslinfo should introduce a new flag called --wsl-version to print the version of current WSL instance

$ wslinfo --wsl-version
2.2.2.0

Alternately, provide /mnt/wsl/versions.txt which contains the output of wsl.exe --version. We already have /mnt/wslg/versions.txt. WSL can have the same.

Alternately, provide an environment variable called WSL_VERSION

Describe alternatives you've considered

Currently I am using wsl.exe --version. This command costs about 100ms while the whole program costs only 200ms.

Additional context

[github-actions]

Logs are required for review from WSL team

If this a feature request, please reply with '/feature'. If this is a question, reply with '/question'.
Otherwise please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

How to collect WSL logs

Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
Set-ExecutionPolicy Bypass -Scope Process -Force
.\collect-wsl-logs.ps1

The scipt will output the path of the log file once done.

Once completed please upload the output files to this Github issue.

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View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• Add default version info flag/parameter for wsl command (#5985), similarity score: 0.74
• Provide a means of obtaining WSL version information from inside WSL instance (#9001), similarity score: 0.73

Closed similar issues:

• Publish the runing WSL version (#6577), similarity score: 0.72

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[CarterLi]

/feature

[github-actions]

Diagnostic information

Found '/feature', adding tag 'feature'

[benhillis]

Fixed with https://github.com/microsoft/WSL/releases/tag/2.2.3.