runs-on: ubuntu-20.04

    - name: Get check suite ID

      id: check_suite_id

      uses: octokit/request-action@v2.x

      with:

        route: GET /repos/{repository}/actions/runs/{run_id}

        repository: ${{ github.repository }}

        run_id: ${{ github.run_id }}

      env:

        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

    - name: Get check runs

      id: check_runs

      uses: octokit/request-action@v2.x

      with:

        route: GET /repos/{repository}/check-suites/{check_suite_id}/check-runs

        repository: ${{ github.repository }}

        check_suite_id: ${{ fromJson(steps.check_suite_id.outputs.data).check_suite_id }}

      env:

        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      shell: bash

      run: |

        echo '[

        ${{ toJson(fromJson(steps.check_runs.outputs.data).check_runs.*.output.title) }}, ${{ toJson(fromJson(steps.check_runs.outputs.data).check_runs.*.output.summary) }}

        ]' | jq '.[0] as $t | .[1] as $s | reduce range(.[0] | length) as $i ([]; . + [if $t[$i] then $t[$i] + ": " + $s[$i] else empty end]) | .[]'

        exit $(echo '${{ toJson(fromJson(steps.check_runs.outputs.data).check_runs.*.output.annotations_count) }}' | jq 'add')

      run: |

        set -x

        # actions/checkout did a merge checkout of the pull-request. As such, the first

        # commit is the merge commit. This means that on HEAD^ is the base branch, and

        # on HEAD^2 are the commits from the pull-request. We now check if those trees

        # have a common parent. If not, we fetch a few more commits till we do. In result,

        # the log between HEAD^ and HEAD^2 will be the commits in the pull-request.

        DEPTH=4

        while [ -z "$(git merge-base HEAD^ HEAD^2)" ]; do

            # Prevent infinite recursion

            if [ ${DEPTH} -gt 256 ]; then

                echo "No common parent between '${GITHUB_HEAD_REF}' and '${GITHUB_BASE_REF}'." >&2

                exit 1

            fi

            git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --deepen=${DEPTH} origin HEAD

            DEPTH=$(( ${DEPTH} * 4 ))

        done

        # Just to show which commits we are going to evaluate.

        git log --oneline HEAD^..HEAD^2

    - name: Checkout commit-checker

      uses: actions/checkout@v2

      with:

        repository: OpenTTD/OpenTTD-git-hooks

        path: git-hooks

        ref: master

      run: |

        set -x

        HOOKS_DIR=./git-hooks/hooks GIT_DIR=.git ./git-hooks/hooks/check-commits.sh HEAD^..HEAD^2

        echo "Commit checks passed"