Ubuntu-20.04 has stopped working

[briantist]

I'm not sure when this started happening but I can no longer get this working with Ubuntu 20,04. Here's the action output with debug logging:

##[debug]Evaluating condition for step: 'Run Vampire/setup-wsl@v1'
##[debug]Evaluating: success()
##[debug]Evaluating success:
##[debug]=> true
##[debug]Result: true
##[debug]Starting: Run Vampire/setup-wsl@v1
##[debug]Loading inputs
##[debug]Evaluating: matrix.distro
##[debug]Evaluating Index:
##[debug]..Evaluating matrix:
##[debug]..=> Object
##[debug]..Evaluating String:
##[debug]..=> 'distro'
##[debug]=> 'Ubuntu-[2](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:2)0.04'
##[debug]Result: 'Ubuntu-20.04'
##[debug]Loading env
Run Vampire/setup-wsl@v1
  with:
    use-cache: false
    distribution: Ubuntu-20.04
    additional-packages: git
  coreutils
  python[3](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:3)
  python3-pip
  
    set-as-default: true | false
    update: false
::group::Verify Windows Environment
Verify Windows Environment
  ::endgroup::
::group::Install Distribution
Install Distribution
  ##[debug]isExplicit: 20.[4](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:4).0
  ##[debug]explicit? true
  ##[debug]checking cache: C:\hostedtoolcache\windows\Ubuntu\20.4.0\x64
  ##[debug]not found
  ##[debug]Caching tool Ubuntu 20.4.0 x64
  ##[debug]source dir: C:\Users\RUNNER~1\AppData\Local\Temp\setup_wsl_fake_dir_NoiVqU
  ##[debug]destination C:\hostedtoolcache\windows\Ubuntu\20.4.0\x64
  ##[debug]finished caching tool
  ##[debug]Downloading https://aka.ms/wslubuntu2004
  ##[debug]Destination D:\a\_temp\81[5](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:5)f9faa-4d4b-4ca4-b5[6](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:6)5-343bdb1fd3a3
  ##[debug]download complete
  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -NoLogo -Sta -NoProfile -NonInteractive -ExecutionPolicy Unrestricted -Command "$ErrorActionPreference = 'Stop' ; try { Add-Type -AssemblyName System.IO.Compression.FileSystem } catch { } ; [System.IO.Compression.ZipFile]::ExtractToDirectory('D:\a\_temp\815f9faa-4d4b-4ca4-b565-343bdb1fd3a3', 'D:\a\_temp\48[7](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:7)b[8](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:8)435-e213-4a5b-807a-45b8416[9](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:9)fe39')"
  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -NoLogo -Sta -NoProfile -NonInteractive -ExecutionPolicy Unrestricted -Command "$ErrorActionPreference = 'Stop' ; try { Add-Type -AssemblyName System.IO.Compression.FileSystem } catch { } ; [System.IO.Compression.ZipFile]::ExtractToDirectory('D:\a\_temp\487b8435-e2[13](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:13)-4a5b-807a-45b84[16](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:16)9fe39\Ubuntu_2004.2021.825.0_x64.appx', 'D:\a\_temp\bfe4d745-65bd-487b-b542-8c742507722c')"
  ##[debug]Caching tool Ubuntu 20.4.0 x64
  ##[debug]source dir: D:\a\_temp\487b8435-e213-4a5b-807a-45b84169fe39
  ##[debug]destination C:\hostedtoolcache\windows\Ubuntu\20.4.0\x64
  ##[debug]finished caching tool
  ::endgroup::
##[debug]Error: Unable to locate executable file: C:\hostedtoolcache\windows\Ubuntu\20.4.0\x64\ubuntu2004.exe. Please verify either the file path exists or the file can be found within a directory specified by the PATH environment variable. Also verify the file has a valid extension for an executable file.
##[debug]    at Object.<anonymous> (D:\a\_actions\Vampire\setup-wsl\v1\build\node_modules\@actions\io\lib\io.js:[18](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:18)4:1)
##[debug]    at Generator.next (<anonymous>)
##[debug]    at fulfilled (D:\a\_actions\Vampire\setup-wsl\v1\build\node_modules\@actions\io\lib\io.js:5:1)
##[debug]
Error: Unable to locate executable file: C:\hostedtoolcache\windows\Ubuntu\[20](https://github.com/briantist/gha-junk/runs/5084790249?check_suite_focus=true#step:5:20).4.0\x64\ubuntu2004.exe. Please verify either the file path exists or the file can be found within a directory specified by the PATH environment variable. Also verify the file has a valid extension for an executable file.
##[debug]Node Action run completed with exit code 1
##[debug]Finishing: Run Vampire/setup-wsl@v1

I had thought it might be related to the cache setting, so this run uses use-cache: 'false'; it appears to successfully download the distribution and then attempt to cache it, but then it cannot find the executable anyway.

When I download the AppX bundle and extract the .appx files myself, what I see is that what presumably used to be called ubuntu2004.exe is now just ubuntu.exe, so I suspect this is where it's going wrong.

This looks like it could be the same issue: microsoft/WSL#7489

[Vampire]

Thanks for the report and the PR.
Actually I test with all supported distributions each night to make sure all still works as expected if something external changes.
But I didn't disable the cache, so the tests are still green.
As soon as I disable the cache, I also get the error.
I'm looking into how to best fix it.

[briantist]

Ah! Yes I saw you have extensive tests and I was wondering why they were passing even on recent runs, that makes sense.

Thanks for looking into it and for all your work on this action.