Matrix jobs dynamic output

[caio-eiq]

Describe the bug
When using the new dynamic output for matrix jobs feature released in the latest version the workflow won't start. The PR merged and released to v2.303.0 is #2477.

To Reproduce
Steps to reproduce the behavior:

1. Write a simple workflow with using Matrix
2. Define an output

(Example):

  deploy:
    needs: [pre-check]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        NAMES: ${{ fromJson(needs.pre-check.outputs.NAMES) }}
    outputs:
      ${{ matrix.NAMES }}_result: ${{ steps.matrix_output.outputs.JOB_STATUS }}
    steps:
      - name: Check status
         id: matrix_output
         run: "JOB_STATUS=FAILURE" >> $GITHUB_OUTPUT

Expected behavior
The dynamic $matrix variable should be supported to use in the outputs key as per the PR #2477 merged and released a couple of weeks ago.

Runner Version and Platform

Version of your runner? v2.303.0

OS of the machine running the runner? Linux (Ubuntu-latest)

What's not working?

The workflow won't even start since the $matrix variable can't be recognized.

ERROR:

Invalid workflow file: .github/workflows/dev.yml#L68)
The workflow is not valid. .github/workflows/dev.yml (Line: 68, Col: 7): Unrecognized named-value: 'matrix'. Located at position 1 within expression: matrix.NAMES

[alvarezfr]

I think this is not a bug, they tell in the PR that there are still some changes to do on the server side.

But they did not provide any ETA right now.

[caio-eiq]

@alvarezfr is there a way we can find out when the server side changes will be made?

[ajaykn]

@caio-eiq Apologies for confusion. This feature is not released yet and ETA would be another 2-3 weeks.

We have updated the release notes and PR description to be more precise.
Please check: #2477 (comment)

[ruvceskistefan]

Hey @caio-eiq, since this is not a Runner bug I'll close this issue. You can reopen it on the service side if you think it's needed since they already have PR ready for it. 😄