neiam /diogramos

name: ci

on:
  push:
    branches: [master]
    tags: ["v*"]
  pull_request:

jobs:
  test:
    # Self-hosted ARC runners (same as ../angler). Swap for `ubuntu-latest`
    # if you'd rather use GitHub-hosted runners. The Postgres service container
    # requires the runner to support service containers (Docker/dind).
    runs-on: arc-runner-set
    env:
      MIX_ENV: test
      # Cap the test DB pool below the Postgres service's default
      # max_connections (100); big CI runners otherwise scale pool to cores×2
      # and exhaust connections.
      POOL_SIZE: "40"
    services:
      postgres:
        image: docker.io/postgres:16-alpine
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
        ports:
          - 5432:5432
        options: >-
          --health-cmd "pg_isready -U postgres"
          --health-interval 5s
          --health-timeout 3s
          --health-retries 5
    steps:
      - uses: actions/checkout@v4

      # ARC's default runner image is bare; install the toolchain needed to
      # compile native deps.
      - run: sudo apt-get update && sudo apt-get install -y --no-install-recommends make build-essential

      - uses: erlef/setup-beam@v1
        with:
          # Match the build image in the Dockerfile.
          elixir-version: "1.17.3"
          otp-version: "27.2"

      - uses: actions/cache@v4
        with:
          path: |
            deps
            _build
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
          restore-keys: ${{ runner.os }}-mix-

      - run: mix deps.get

      # `mix precommit` = compile --warnings-as-errors, deps.unlock --unused,
      # format, test (which creates + migrates the test DB).
      - run: mix precommit

  image:
    needs: test
    runs-on: arc-runner-set
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4
      - uses: docker/setup-buildx-action@v3

      # GHCR uses the built-in token. Docker Hub and Quay creds come from
      # org-wide secrets (DOCKERHUB_USER/DOCKERHUB_TOKEN, QUAY_USERNAME/QUAY_TOKEN).
      - name: Log in to GHCR
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Log in to Docker Hub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: docker.io
          username: ${{ secrets.DOCKERHUB_USER }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Log in to Quay
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: quay.io
          username: ${{ secrets.QUAY_USERNAME }}
          password: ${{ secrets.QUAY_TOKEN }}

      - id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ghcr.io/${{ github.repository }}
            docker.io/neiam/diogramos
            quay.io/neiam/diogramos
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha
            type=raw,value=latest,enable={{is_default_branch}}

      - uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max