---
# This action requires the following secrets to be set on the repository:
#   GH_USER_NAME: GitHub user whose Jenkins and GitHub token are defined below
#   GH_USER_TOKEN: GitHub user token, to be used by ncu and to push changes
#   JENKINS_TOKEN: Jenkins token, to be used to check CI status

name: Commit Queue

on:
  # `schedule` event is used instead of `pull_request` because when a
  # `pull_request` event is triggered on a PR from a fork, GITHUB_TOKEN will
  # be read-only, and the Action won't have access to any other repository
  # secrets, which it needs to access Jenkins API.
  schedule:
    - cron: "*/5 * * * *"

env:
  NODE_VERSION: 14.x

jobs:
  commitQueue:
    if: github.repository == 'nodejs/node'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          # Needs the whole git history for ncu to work
          # See https://github.com/nodejs/node-core-utils/pull/486
          fetch-depth: 0
          # A personal token is required because pushing with GITHUB_TOKEN will
          # prevent commits from running CI after they land on master. It needs
          # to be set here because `checkout` configures GitHub authentication
          # for push as well.
          token: ${{ secrets.GH_USER_TOKEN }}

      # Install dependencies
      - name: Install Node.js
        uses: actions/setup-node@v2-beta
        with:
          node-version: ${{ env.NODE_VERSION }}
      - name: Install node-core-utils
        run: npm install -g node-core-utils@latest

      - name: Set variables
        run: |
          echo "REPOSITORY=$(echo ${{ github.repository }} | cut -d/ -f2)" >> $GITHUB_ENV
          echo "OWNER=${{ github.repository_owner }}" >> $GITHUB_ENV

      - name: Get Pull Requests
        uses: octokit/graphql-action@v2.x
        id: get_mergable_pull_requests
        with:
          query: |
            query release($owner:String!,$repo:String!, $base_ref:String!) {
              repository(owner:$owner, name:$repo) {
                pullRequests(baseRefName: $base_ref, labels: ["commit-queue"], states: OPEN, last: 100) {
                  nodes {
                    number
                  }
                }
              }
            }
          owner: ${{ env.OWNER }}
          repo: ${{ env.REPOSITORY }}
          # Commit queue is only enabled for the default branch on the repository
          # TODO(mmarchini): get the default branch programmatically instead of
          # assuming `master`
          base_ref: "master"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Configure node-core-utils
        run: |
          ncu-config set branch master
          ncu-config set upstream origin
          ncu-config set username "${{ secrets.GH_USER_NAME }}"
          ncu-config set token "${{ secrets.GH_USER_TOKEN }}"
          ncu-config set jenkins_token "${{ secrets.JENKINS_TOKEN }}"
          ncu-config set repo "${{ env.REPOSITORY }}"
          ncu-config set owner "${{ env.OWNER }}"

      - name: Start the commit queue
        run: ./tools/actions/commit-queue.sh ${{ env.OWNER }} ${{ env.REPOSITORY }} ${{ secrets.GITHUB_TOKEN }} $(echo '${{ steps.get_mergable_pull_requests.outputs.data }}' | jq '.repository.pullRequests.nodes | map(.number) | .[]')