name: Get merge commit

on:
  pull_request:
    paths:
      - .github/workflows/get-merge-commit.yml
  workflow_call:
    outputs:
      mergedSha:
        description: "The merge commit SHA"
        value: ${{ jobs.resolve-merge-commit.outputs.mergedSha }}
      targetSha:
        description: "The target commit SHA"
        value: ${{ jobs.resolve-merge-commit.outputs.targetSha }}
      systems:
        description: "The supported systems"
        value: ${{ jobs.resolve-merge-commit.outputs.systems }}

permissions: {}

jobs:
  resolve-merge-commit:
    runs-on: ubuntu-24.04-arm
    outputs:
      mergedSha: ${{ steps.merged.outputs.mergedSha }}
      targetSha: ${{ steps.merged.outputs.targetSha }}
      systems: ${{ steps.systems.outputs.systems }}
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          path: base
          sparse-checkout: ci

      - name: Check if the PR can be merged and get the test merge commit
        id: merged
        env:
          GH_TOKEN: ${{ github.token }}
          GH_EVENT: ${{ github.event_name }}
        run: |
          case "$GH_EVENT" in
            push)
              echo "mergedSha=${{ github.sha }}" >> "$GITHUB_OUTPUT"
              ;;
            pull_request*)
              if commits=$(base/ci/get-merge-commit.sh ${{ github.repository }} ${{ github.event.number }}); then
                echo -e "Checking the commits:\n$commits"
                echo "$commits" >> "$GITHUB_OUTPUT"
              else
                # Skipping so that no notifications are sent
                echo "Skipping the rest..."
              fi
              ;;
          esac

      - name: Load supported systems
        id: systems
        run: |
          echo "systems=$(jq -c <base/ci/supportedSystems.json)" >> "$GITHUB_OUTPUT"