publish-docker.yml

name: Build and Publish Docker Image

env:
  platforms: linux/amd64,linux/arm64

on:
  release:
    types:
      - published
  push:
    branches:
      - main
    tags:
      - v*
    paths-ignore:
      - 'docs/**'
      - '**/*.md'
      - 'example/**'
  pull_request:
    types:
      - labeled
    paths-ignore:
      - 'docs/**'
      - '**/*.md'
      - 'example/**'

jobs:
  buildAndPush:
    strategy:
      matrix:
        image:
          - name: gardener-extension-provider-metal
            target: gardener-extension-provider-metal
          - name: gardener-extension-admission-metal
            target: gardener-extension-admission-metal
    if: ${{ github.event.label.name == 'ok-to-image' }} || ${{ github.event.label.name == 'ok-to-🐳' }} || ${{ github.ref == 'refs/heads/main' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: docker/metadata-action@v5
        id: meta
        with:
          images: |
            ghcr.io/${{ github.repository_owner }}/${{ matrix.image.name }}
          tags: |
            type=semver,pattern={{version}}
            type=schedule
            type=ref,event=branch
            type=ref,event=tag
            type=ref,event=pr
            type=sha
          flavor: |
            latest=${{ github.ref == 'refs/heads/main' }}
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          image: tonistiigi/binfmt:latest
          platforms: ${{env.platforms}}
      # workaround for self-hosted runner
      # https://github.com/mumoshu/actions-runner-controller-ci/commit/e91c8c0f6ca82aa7618010c6d2f417aa46c4a4bf
      - name: Set up Docker Context for Buildx
        id: buildx-context
        run: |
          docker context create builders
      - name: Set up Docker Buildx
        timeout-minutes: 5
        uses: docker/setup-buildx-action@v3
        with:
          version: latest
          endpoint: builders # self-hosted
      - name: Login to GHCR
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
        timeout-minutes: 40
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          target: ${{ matrix.image.target }}