name: Linting

# The main value of this check is to post a comment on the pull request, so
# only run on pull requests. You can also run on pushes and output to the
# console, but that is not very visible to developers.
on: [pull_request]

# Limit to one concurrent job and cancel previous runs if a new one is started.
# Because the action posts a comment on the pull request allowing concurrent
# workflows can cause duplicate comments.
concurrency:
  group: check-migrations-${{ github.head_ref }}
  cancel-in-progress: true

jobs:
  check-migrations:
    runs-on: ubuntu-latest

    services:
      postgres:
        image: postgres:latest
        ports:
          - 5432:5432
        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
        env:
          POSTGRES_DB: my_database
          POSTGRES_USER: my_user
          POSTGRES_PASSWORD: my_password

    steps:
      - uses: actions/[email protected]
        with:
          python-version: '3.9'

      # Check out the main branch and apply migrations
      - name: Check out main branch
        uses: actions/[email protected]
        with:
          ref: main
      - name: Install dependencies
        run: pip install -r requirements.txt
      - name: Apply migrations
        run: ./manage.py migrate

      # Check out the current branch and install dependencies
      - name: Check out current branch
        uses: actions/[email protected]
      - name: Install dependencies
        run: pip install -r requirements.txt

      # Check migrations. This will check any unapplied migrations. Because
      # we applied all migrations in the main branch this means that only new
      # migrations in this branch will be checked.
      - name: Check migrations
        uses: kolonialno/[email protected]
        with:
          django-settings-module: my_project.settings
          github-token: ${{ secrets.GITHUB_TOKEN }}