Dulus/.github/workflows/docker.yml at main · KevRojo/Dulus · GitHub

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# Build & publish the Dulus Docker image to GitHub Container Registry.
#
# Triggers:
#   - Push to main          → updates ghcr.io/kevrojo/dulus:latest
#   - Push of a v* tag      → adds ghcr.io/kevrojo/dulus:<version> + updates latest
#   - Manual dispatch       → rebuild on demand
#
# Builds multi-arch (amd64 + arm64) so Apple Silicon Macs and ARM servers
# (Graviton, Raspberry Pi 5, etc.) get a native image — no QEMU emulation.

name: docker

on:
  push:
    branches: [main]
    tags: ["v*"]
    # Docs-only commits (README, news, changelog, the investor deck, i18n
    # READMEs, images) don't change the image — skip the ~15-min multi-arch
    # build for them. Tag pushes (v*) still build regardless, since a release
    # commit also bumps the code. This keeps frequent docs pushes from flashing
    # a red X when GitHub's action CDN rate-limits the buildx/qemu download.
    paths-ignore:
      - "**/*.md"
      - "docs/**"
      - "**/*.pdf"
      - "**/*.png"
      - "**/*.jpg"
      - "**/*.svg"
  workflow_dispatch:

# A newer push to the same ref supersedes any in-flight build for that ref,
# so stale builds get cancelled instead of hogging runners for 15+ min.
concurrency:
  group: docker-${{ github.ref }}
  cancel-in-progress: true

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository_owner }}/dulus

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    timeout-minutes: 30   # normal multi-arch build ~9 min; 30 catches true hangs
    permissions:
      contents: read
      packages: write   # required to push to ghcr.io

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU (for cross-arch builds)
        uses: docker/setup-qemu-action@v3

      - 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.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Compute tags:
      #   - on a tag push (refs/tags/v3.1.0)  →  ghcr.io/.../dulus:3.1.0  + :latest
      #   - on a main push                    →  ghcr.io/.../dulus:latest
      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Build and push (multi-arch)
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64
          build-args: |
            DULUS_SOURCE=local
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # GHA cache speeds repeated builds from ~5 min to ~1 min when the
          # Dockerfile layers haven't changed.
          cache-from: type=gha
          cache-to: type=gha,mode=max