treadmill-ci-test.yml

name: treadmill-ci-test

env:
  TERM: xterm # Makes tput work in actions output

# Controls when the action will run. Triggers the workflow on pull request and
# merge group checks:
#
# KEEP IN SYNC WITH `environment:` ATTRIBUTE BELOW:
on:
  push:
    branches:
      - main
  # Pull requests from forks will not have access to the required GitHub API
  # secrets below, even if they are using an appropriate deployment environment
  # and the workflow runs have been approved according to this environment's
  # rules. We don't know whether this is a bug on GitHub's end or deliberate.
  # Either way, for now we disable this workflow to run on PRs until we have
  # an API proxy that securely performs these GitHub API calls (adding runners
  # and starting Treadmill jobs with those runner registration tokens), which
  # allows this workflow to run without access to repository secrets.
  #pull_request:
  merge_group: # Run CI for the GitHub merge queue

permissions:
  contents: read

jobs:
  analyze-changes:
    runs-on: ubuntu-latest

    outputs:
      hwci-tests-json: ${{ steps.analyze-changes.outputs.hwci-tests-json }}

    steps:
      # This is not run within the context of a repository that contains actual
      # kernel / userspace code, so there is nothing for us to analyze. Instead
      # we clone this very repository and select all test definitions:
      - name: Checkout the tock-hardware-ci repository
        uses: actions/checkout@v4
        with:
          path: tock-hardware-ci

      - name: Checkout the tock/tock repository
        uses: actions/checkout@v4
        with:
          # Checkout the repository at the commit that triggered the workflow
          repository: tock/tock
          path: tock-tock

      - name: Select all defined tests
        id: analyze-changes
        run: |
          # Run the select_tests.py script
          python3 tock-hardware-ci/hwci/select_tests.py \
            --repo-path tock-tock \
            --hwci-path tock-hardware-ci/hwci \
            --output selected_tests.json

          echo "Selected HWCI tests:"
          cat selected_tests.json

          # Output the tests JSON
          hwci_tests_json=$(cat selected_tests.json | jq -c '.')
          echo "hwci-tests-json=${hwci_tests_json}" >> "$GITHUB_OUTPUT"

  run-treadmill-ci:
    needs: [analyze-changes]

    uses: ./.github/workflows/treadmill-ci.yml

    # This checks whether there is at least one test to run, see
    # https://github.com/orgs/community/discussions/27125#discussioncomment-3254720
    if: fromJSON(needs.analyze-changes.outputs.hwci-tests-json)[0] != null

    with:
      # Only run on a specific repository, as others will not have the right
      # environments set up and secrets configured. Forks may want to change
      # this parameter.
      repository-filter: 'tock/tock-hardware-ci'

      # Provide access to the required Treadmill secrets by running in the
      # appropriate environment (depending on the on: triggers above)
      job-environment: ${{ github.event_name == 'pull_request' && 'treadmill-ci' || 'treadmill-ci-merged' }}


      # This workflow tests the tock-hardware-ci scripts itself, so take the
      # current GITHUB_SHA:
      tock-hardware-ci-ref: ${{ github.sha }}

      # Use the latest upstream Tock kernel / userspace components:
      tock-kernel-ref: 'master'
      libtock-c-ref: 'master'
      tests-json: ${{ needs.analyze-changes.outputs.hwci-tests-json }}

    secrets: inherit