name: Container image

# Builds the image that docker-compose.yaml pulls, for amd64 and arm64
# (a Raspberry Pi 4/5 or an ARM VPS runs the same image).
#
#   push to main   -> ghcr.io/tillheidrich/klarbild:edge
#   tag v1.2.3     -> :1.2.3, :1.2, :1 and :latest
#
# Nothing to configure: the workflow pushes with its own GITHUB_TOKEN.

on:
  push:
    branches: [main]
    tags: ['v*.*.*']
  workflow_dispatch:

permissions:
  contents: read
  packages: write

concurrency:
  group: image-${{ github.ref }}
  cancel-in-progress: true

jobs:
  image:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5

      - uses: docker/setup-qemu-action@v3
      - uses: docker/setup-buildx-action@v3

      - uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository_owner }}/klarbild
          tags: |
            type=edge,branch=main
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
          labels: |
            org.opencontainers.image.title=Klarbild
            org.opencontainers.image.description=Self-hosted print studio: pictures on paper at exactly the size you asked for.
            org.opencontainers.image.licenses=AGPL-3.0-only

      - uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max