Get output of a specific step in github actions

Question

I have this GitHub Actions workflow which runs tests, but now I am integrating slack notification in it. I want to get the output of the Run tests step and send it as a message in the slack step.

  - name: Run tests     run: |       mix compile --warnings-as-errors       mix format --check-formatted       mix ecto.create       mix ecto.migrate       mix test     env:       MIX_ENV: test       PGHOST: localhost       PGUSER: postgres    - name: Slack Notification     uses: rtCamp/action-slack-notify@master     env:       SLACK_MESSAGE: Run tests output       SLACK_TITLE: CI Test Suite       SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }} 

Answer 1

You need to do 3 things:

1. Add an id to the step you want the output from
2. Create the outputs using the set-output command
3. Use the id and the output name in another step to get the outputs and then join them into one message for slack

- name: Run tests   run: |     echo "::set-output name=mix-compile--warnings-as-errors::$(mix compile --warnings-as-errors)\n"     echo "::set-output name=mix-format--check-formatted::$(mix format --check-formatted)\n"     echo "::set-output name=mix-ecto_create::$(mix ecto.create)\n"     echo "::set-output name=mix-ecto_migrate::$(mix ecto.migrate)\n"     echo "::set-output name=mix-test::$(mix test)\n"   id: run_tests   env:     MIX_ENV: test     PGHOST: localhost     PGUSER: postgres  - name: Slack Notification   uses: rtCamp/action-slack-notify@v2   env:     SLACK_MESSAGE: ${{join(steps.run_tests.outputs.*, '\n')}}     SLACK_TITLE: CI Test Suite     SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }} 

See Metadata Syntax for outputs name description