docker-build.yaml

name: Docker Build

on:
  pull_request:
  push:
    branches:
      - "main"
    tags:
      - "*"

jobs:
  docker-build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Get python version from file
        run: echo "PYTHON_VERSION=$(cat .python-version)" | tee -a "$GITHUB_ENV"

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: "ghcr.io/${{ github.repository }}"
          tags: |
            type=ref,event=pr
            type=semver,pattern=v{{major}}
            type=semver,pattern=v{{major}}.{{minor}}
            type=semver,pattern=v{{version}}
            type=raw,value=edge,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}

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

      - name: Login to Github Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v5
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64 # TODO: add `linux/arm64/v8`
          build-args: |
            PYTHON_VERSION=${{ env.PYTHON_VERSION }}

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}