name: Docker

on:
  push:
    branches: [main]
    tags: ["v*"]

env:
  REGISTRY: ghcr.io
  APP_IMAGE: ghcr.io/nmemmert/letter
  NOTIFIER_IMAGE: ghcr.io/nmemmert/letter-notifier

jobs:
  docker:
    name: Build & push images
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata — app
        id: meta-app
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.APP_IMAGE }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix=sha-,format=short

      - name: Extract metadata — notifier
        id: meta-notifier
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.NOTIFIER_IMAGE }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix=sha-,format=short

      - name: Build and push — app
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta-app.outputs.tags }}
          labels: ${{ steps.meta-app.outputs.labels }}
          cache-from: type=gha,scope=app
          cache-to: type=gha,mode=max,scope=app

      - name: Build and push — notifier
        uses: docker/build-push-action@v6
        with:
          context: ./notifier
          push: true
          tags: ${{ steps.meta-notifier.outputs.tags }}
          labels: ${{ steps.meta-notifier.outputs.labels }}
          cache-from: type=gha,scope=notifier
          cache-to: type=gha,mode=max,scope=notifier