name: checkout
on: push
jobs:
  checkout:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - id: checkout
        uses: builtin:checkout
      - uses: builtin:checkout
        with:
          ref: ${{ github.ref_name }}
          path: short
      - run: test "$(git -C short rev-parse HEAD)" = "$GITHUB_SHA"
      - if: github.ref_type == 'branch'
        run: |
          test "$(git symbolic-ref HEAD)" = "$GITHUB_REF"
          test "${{ steps.checkout.outputs.ref }}" = "$GITHUB_REF"
          test "${{ steps.checkout.outputs.commit }}" = "$GITHUB_SHA"
          git -c user.name=e2e -c user.email=e2e@example.com commit --allow-empty -m pushed
          git push
          git tag moved
          git push --force origin moved
          git switch --orphan child
          echo child > child.txt
          git add child.txt
          git -c user.name=e2e -c user.email=e2e@example.com commit -m child
          git push origin child
          git switch -c content main
          git submodule add -b child "../${{ github.event.repository.name }}.git" sub
          git lfs install --local
          git lfs track '*.bin'
          mkdir keep drop
          echo big > keep/big.bin
          echo big > drop/big.bin
          git add .gitattributes keep drop
          git -c user.name=e2e -c user.email=e2e@example.com commit -m content
          git push origin content
      - if: github.ref_type == 'branch'
        uses: builtin:checkout
        with:
          ref: content
          path: full
          submodules: true
          lfs: true
      - if: github.ref_type == 'branch'
        uses: builtin:checkout
        with:
          ref: content
          path: sparse
          sparse-checkout: keep
          lfs: true
      - if: github.ref_type == 'branch'
        run: |
          test "$(cat full/sub/child.txt)" = child
          test "$(cat full/keep/big.bin)" = big
          test "$(cat sparse/keep/big.bin)" = big
          test ! -e sparse/drop
      - if: github.ref_type == 'tag'
        run: test "$(git describe --tags)" = "$GITHUB_REF_NAME"