name: Check out index repos
description: >
  Check out alire-index with full history (needed by diff detectors
  and check-author; grafted partial branches cause confusion), and
  alire-index-checks checked out at the PR base branch.
  Also exports CHECKS_REPO for use in subsequent run steps.

inputs:
  checks_repo:
    description: Name of the checks repository.
    required: false
    default: alire-index-checks

runs:
  using: composite
  steps:
  - name: Check out alire-index
    uses: actions/checkout@v4
    with:
      fetch-depth: 0

  - name: Check out alire-index-checks
    uses: actions/checkout@v4
    with:
      repository: alire-project/${{ inputs.checks_repo }}
      ref: ${{ github.base_ref }}
      path: ${{ inputs.checks_repo }}

  - name: Export CHECKS_REPO
    shell: bash
    run: echo "CHECKS_REPO=${{ inputs.checks_repo }}" >> "$GITHUB_ENV"