3PodR_Template/.github/workflows/docker-publish.yml at main · CogDisResLab/3PodR_Template · GitHub

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name: Build and Push to Docker Hub

on:
  push:
    branches: [ "main" ]

permissions:
  contents: read

jobs:
  build:
    # Use the 'arm' suffix for the new optimized GitHub-hosted runners
    runs-on: ${{ matrix.arch == 'amd64' && 'ubuntu-latest' || 'ubuntu-24.04-arm' }}
    strategy:
      fail-fast: false
      matrix:
        arch: [amd64, arm64]

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

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

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_API_KEY }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: cdrl/3podr_container

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/${{ matrix.arch }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          # This pushes the architecture-specific image to Docker Hub
          # using a unique SHA instead of a tag like 'latest'
          outputs: type=image,name=cdrl/3podr_container,push-by-digest=true,name-canonical=true,push=true

      - name: Export digest
        run: |
          mkdir -p ${{ runner.temp }}/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.arch }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs: build
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digests-*
          merge-multiple: true

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

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_API_KEY }}

      - name: Extract metadata (for final tags)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: cdrl/3podr_container
          tags: |
            type=ref,event=branch
            type=sha,format=short
            latest

      - name: Create manifest list and push
        working-directory: ${{ runner.temp }}/digests
        run: |
          # Robustly create the manifest using all generated tags from metadata-action
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf 'cdrl/3podr_container@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect cdrl/3podr_container:${{ steps.meta.outputs.version }}