Fail to load /home/runner/work/_actions/lukka/run-cmake/v1/action.yml`

[lukka]

Describe the bug
since runner version '2.168.0' my run-cmake is broken. It is working on Current runner version: '2.165.2'.

Download action repository 'lukka/run-cmake@v1'
##[error](Line: 34, Col: 14):
##[error](Line: 34, Col: 14): Unrecognized named-value: 'env'. Located at position 1 within expression: env.RUNVCPKG_VCPKG_TRIPLET
##[error]Fail to load /home/runner/work/_actions/lukka/run-cmake/v1/action.yml`

My action.yml contains:

vcpkgTriplet:
    default: "${{ env.RUNVCPKG_VCPKG_TRIPLET }}"

To Reproduce
Use lukka/run-cmake@v1 action in your workflow on GitHub.

Expected behavior
vcpkgTriplet should be set to the value of the env var

Runner Version and Platform

Version of your runner?
'2.168.0'

OS of the machine running the runner? OSX/Windows/Linux/...
ubuntu/Linux

What's not working?

The runner fails at parsing action.yml

Job Log Output

lukka/run-cmake#11

[TingluoHuang]

@lukka we only support using static well known context for input default value, since default value should always exists, relies on dynamic value doesn't make sense.
https://github.com/actions/runner/blob/master/src/Runner.Worker/action_yaml.json#L88

[lukka]

It is unfortunate to hear that.

[TingluoHuang]

@lukka do you mind share how do you use the ${{env.xxx}} in your action's input default value?

[lukka]

Sure, there is the action.yml. The input parameter is named vcpkgTriplet.

I think i can work around this by setting the default value in the action itself, when core.getInput() return a blank string (afaik it never returns null or undefined).

Anyway it is a nice feature to have to be able to say "the default of this input is (potentially) defined in this environment variable", and imho it would be better to support it rather than not.