# Workflow will trigger on all pull request (except draft), pull request
# review, and commit push to a pull request (synchronize) event types
#
# NOTE: pull_request_target behaves the same as pull_request except it grants a
# read/write token to workflows running on a pull request from a fork. While
# this may seem unsafe, the permissions for the token are limited below and
# the permissions can not be changed without merging to master which is
# protected by CODEOWNERS.
name: Check
on:
  pull_request_review:
    type: [submitted, edited, dismissed]
  pull_request_target:
    types: [opened, ready_for_review, synchronize, labeled, unlabeled]

# Limit the permissions on the GitHub token for this workflow to the subset
# that is required. In this case, the check workflow needs to invalidate
# reviews and delete workflow runs, so it needs write access to "actions" and
# "pull-requests", nothing else.
permissions:
    actions: write
    pull-requests: write
    checks: none
    contents: none
    deployments: none
    issues: none
    packages: none
    repository-projects: none
    security-events: none
    statuses: none

jobs:
  check-reviews:
    name: Checking reviewers
    if: ${{ !github.event.pull_request.draft && !startsWith(github.head_ref, 'dependabot/') }}
    runs-on: ubuntu-latest
    steps:
      - name: Generate GitHub Token
        id: generate_token
        uses: tibdex/github-app-token@v1
        with:
          app_id: ${{ secrets.REVIEWERS_APP_ID }}
          private_key: ${{ secrets.REVIEWERS_PRIVATE_KEY }}
      # Checkout main branch of shared-workflow repository.
      - name: Checkout shared-workflow
        uses: actions/checkout@v3
        with:
          repository: gravitational/shared-workflows
          path: .github/shared-workflows
          ref: main
      - name: Installing Go
        uses: actions/setup-go@v3
        with:
          go-version-file: .github/shared-workflows/bot/go.mod
        # Run "check" subcommand on bot.
      - name: Checking reviewers
        run: cd .github/shared-workflows/bot && go run main.go -workflow=check -token="${{ steps.generate_token.outputs.token }}" -reviewers="${{ secrets.reviewers }}"