pr-preview.yml

name: Launch preview environment

on:
  pull_request:
    types: [labeled]

jobs:
  preview:
    runs-on: ubuntu-latest
    if: ${{ github.event.label.name == 'preview' }}
    env:
      IMAGE_NAME: incidental/backend

    steps:
      - uses: actions/checkout@v3

      - name: Set up Python 3.11
        uses: actions/setup-python@v4
        with:
          python-version: "3.11"

      - name: Lint with flake8
        run: |
          pip install flake8
          # stop the build if there are Python syntax errors or undefined names
          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Build image
        uses: docker/build-push-action@v4
        with:
          context: backend
          tags: ${{env.IMAGE_NAME}}:latest
          cache-from: type=gha
          cache-to: type=gha,mode=max
          outputs: type=docker

      - name: Copy env file
        run: cp backend/.env.example backend/.env

      - name: Create the docker compose stack
        run: docker compose -f backend/docker-compose.yml up -d

      - name: Check local running docker containers
        run: docker ps -a

      - name: Migrate db
        run: docker compose -f backend/docker-compose.yml exec -T backend sh -c "alembic upgrade head"

      - name: Get short commit SHA, display tunnel URL and IP Address of the worker node
        id: get-subdomain
        run: |
          subdomain="pr-$(git rev-parse --short HEAD)"
          echo "URL for tunnelling: https://$subdomain.loca.lt"
          echo "subdomain=$subdomain" >> $GITHUB_OUTPUT
          worker_ip="$(curl -4 -s ipconfig.io/ip)"
          echo "Worker node IP address: $worker_ip"

      - name: Start tunnel
        env:
          SUBDOMAIN: ${{ steps.get-subdomain.outputs.subdomain }}
          NGROK_AUTH_TOKEN: ${{ secrets.NGROK_AUTH_TOKEN }}
        run: |
          curl -O https://bin.equinox.io/c/bNyj1mQVY4c/ngrok-v3-stable-linux-amd64.tgz  
          sudo tar -xvzf ./ngrok-v3-stable-linux-amd64.tgz -C /usr/local/bin
          ngrok config add-authtoken ${NGROK_AUTH_TOKEN}
          ngrok http 5000 --domain ${SUBDOMAIN}.ngrok.io