Lazy variable evaluation ?

[rockandska]

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Actions Runner

Discussion Details

Hello,

I try to find a way to do lazy evaluation but didn't find a working example nor know if it is possible.
I'm looking to do something like:

name: test
on:
  push:
env:
  test: ${{ runner.os }}-${{ hashFiles('.python-version') }}
jobs:
  test:
    runs-on: ubuntu-22.04
    steps:
      - name: checkout
        uses: actions/checkout@v2

      - name: test
        run: |
          echo ${{ env.test  }}    

Is there any way to achieve this ?

Thanks,

Regards,

[ChristopherHX]

If this is GitHub.com Actions (this is too new for GHES right now, hosted enterprise edition might work as well), you could also use yaml anchors if your concern is repeating this in your yaml file, otherwise https://github.com/orgs/community/discussions/173194#discussioncomment-14407410 is better. Or even combine both, create your own composite action etc..

name: test
on:
  push:
jobs:
  test:
    runs-on: ubuntu-22.04
    steps:
      - name: checkout
        uses: &checkout actions/checkout@v2 # Update this to v5 and every job that has *checkout will see the change

      - name: test
        run: |
          echo ${{ env.test  }}
        env:
           test: &test ${{ runner.os }}-${{ hashFiles('.python-version') }}
  test2:
    runs-on: ubuntu-22.04
    steps:
      - name: checkout
        uses: *checkout # share version of checkout
      - name: test
        run: |
          echo ${{ env.test  }}
        env:
           test: *test # alias for anchor &test, can be reused over and over again

Only if it is not a requirement to specify this in the global env, thing

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