docker.yaml

name: Build and publish a Docker image

on:
  push:
    branches:
      - 'main'
  workflow_run:
    workflows: [Release]
    types:
      - completed
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  PYTHON_VERSION: '3.12'

# See https://docs.github.com/en/actions/use-cases-and-examples/publishing-packages/publishing-docker-images
jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.ref }}

      - name: Install python
        uses: actions/setup-python@v5
        with:
          python-version: ${{env.PYTHON_VERSION}}

      - name: Install uv
        uses: astral-sh/setup-uv@v4

      - name: Set package version
        run: |
          VERSION=$(uvx dunamai from git --style semver)
          echo "PACKAGE_VERSION=$VERSION" >> $GITHUB_ENV

      - name: Export requirements.txt file
        run: uv export --all-packages --all-extras --format requirements-txt --no-hashes --no-editable --no-default-groups --no-emit-workspace > requirements.txt

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

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

      - name: Get git branch and short sha for tag
        run: |
          git_hash_short=$(git rev-parse --short "$GITHUB_SHA")
          echo "GIT_HASH_SHORT=${git_hash_short}" >> $GITHUB_ENV
          git_branch=$(git branch -r --contains ${{ github.ref }} --merged ${{ github.ref }} --format "%(refname:lstrip=3)" | grep -v HEAD)
          echo "GIT_BRANCH=${git_branch}" >> $GITHUB_ENV
          git_branch_docker_safe=$(echo ${git_branch} | tr / -)
          echo "GIT_BRANCH_DOCKER_SAFE=${git_branch_docker_safe}" >> $GITHUB_ENV

      # Tagging documented at: https://github.com/docker/metadata-action?tab=readme-ov-file#basic
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern={{version}},value=${{ env.PACKAGE_VERSION }},enable=${{ (github.event_name == 'workflow_run') && (github.event.workflow_run.conclusion == 'success') }}
            type=sha,format=short
            type=raw,value=latest,enable=${{ env.GIT_BRANCH == 'main' }}

      - name: Build and push Docker image
        id: push
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }},${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.GIT_BRANCH_DOCKER_SAFE }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache
          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache,mode=max
          build-args: |
            semver=${{ env.PACKAGE_VERSION }}
            git_hash_short=${{ env.GIT_HASH_SHORT }}
            git_branch=${{ env.GIT_BRANCH }}
            build_date=$(date -u -Iseconds)

      - name: Generate artifact attestation
        uses: actions/attest-build-provenance@v1
        with:
          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
          subject-digest: ${{ steps.push.outputs.digest }}
          push-to-registry: true

      - name: Delete untagged images
        uses: dataaxiom/ghcr-cleanup-action@v1
        with:
          delete-untagged: true
          older-than: 30 days