pre-checkout.yaml

name: Pre checkout

on:
  workflow_call:
    outputs:
      sha:
        value: ${{ jobs.checkout.outputs.sha }}
        description: Commit SHA

permissions:
  contents: read

jobs:
  checkout:
    name: Checkout
    runs-on: ubuntu-22.04
    outputs:
      sha: ${{ steps.checkout.outputs.commit }}
    steps:
      - name: Prepare
        id: prepare
        env:
          event_name: ${{ github.event_name }}
          pr_number: ${{ github.event.pull_request.number }}
          default_ref: ${{ github.ref }}
        run: |
          if [[ "$event_name" == 'pull_request_target' ]]; then
            if [[ -z "$pr_number" ]]; then
              exit 1
            fi
            echo "ref=refs/pull/${pr_number}/merge" >> $GITHUB_OUTPUT
          else
            echo "ref=${default_ref}" >> $GITHUB_OUTPUT
          fi

      - name: Checkout
        id: checkout
        uses: actions/checkout@v4.2.1
        with:
          persist-credentials: false
          ref: ${{ steps.prepare.outputs.ref }}
          fetch-depth: 1