Is it possible to get outputs from a bash script?

[DanForever]

I'm trying to run a .sh script from a composite action, and get some output back using something like echo ::set-output name=some_output::"$SOME_OUTPUT" (from within the shell script). However, I'm not having much luck. My searches online seem to indicate that it should be possible, but it's also vague enough that it might now work.

So my question is twofold:

1. Is this something I can do with github actions?
2. If so, is it supported by Act?
   Thanks!

[ChristopherHX]

Is this something I can do with github actions?

You can set output from within a shell script, the bash script must be able to print to the stdout so the runner sees the command

is it supported by Act?

Yes

script.sh

echo "::set-output name=test::value"
LOCALVAR="Hello World"
echo "::set-output name=test::$LOCALVAR"

.github/workflows/test.yml

on: push
jobs:
  _:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - run: |
          bash ./script.sh
        id: myscript
        shell: bash
      - run: |
          echo "$SCRIPTOUTPUT"
        shell: bash
        env:
          SCRIPTOUTPUT: "${{ tojson(steps.myscript.outputs) }}"

Sample log:

[test.yml/_] ⭐ Run Main bash ./script.sh
[test.yml/_]   🐳  docker exec cmd=[bash --noprofile --norc -e -o pipefail /var/run/act/workflow/myscript.sh] user= workdir=
[test.yml/_]   ⚙  ::set-output:: test=value
[test.yml/_]   ⚙  ::set-output:: test=Hello World
[test.yml/_]   ✅  Success - Main bash ./script.sh
[test.yml/_] ⭐ Run Main echo "$SCRIPTOUTPUT"
[test.yml/_]   🐳  docker exec cmd=[bash --noprofile --norc -e -o pipefail /var/run/act/workflow/2.sh] user= workdir=
[test.yml/_]   | {
[test.yml/_]   |   "test": "Hello World"
[test.yml/_]   | }
[test.yml/_]   ✅  Success - Main echo "$SCRIPTOUTPUT"
[test.yml/_] 🏁  Job succeeded