docker.yml

name: Publish Docker Image and Deploy

on:
  push:
    tags: [ 'v*.*.*' ]
  workflow_dispatch:
    inputs:
      custom_tag:
        description: 'Custom tag (leave empty for preview-YYYYMMDD-HHMMSS)'
        required: false
        type: string

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ibenzene/image-downloader_server

jobs:
  build:
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.version.outputs.version }}
    permissions:
      contents: read
      packages: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write

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

      - name: Prepare Version
        id: version
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            CUSTOM_TAG="${{ github.event.inputs.custom_tag }}"
            if [ -z "$CUSTOM_TAG" ]; then
              VERSION="preview-$(date +'%Y%m%d-%H%M%S')"
            else
              VERSION="$CUSTOM_TAG"
            fi
          else
            VERSION="${{ github.ref_name }}"
          fi
          echo "VERSION=$VERSION" >> $GITHUB_ENV
          echo "version=$VERSION" >> $GITHUB_OUTPUT

      # Install the cosign tool except on PR
      # https://github.com/sigstore/cosign-installer
      - name: Install Cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
        with:
          cosign-release: 'v2.2.4'

      # Set up BuildKit Docker container builder to be able to build
      # multi-platform images and export cache
      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into Registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker Metadata
        id: meta
        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=${{ env.VERSION }}
            type=raw,value=latest,enable=${{ github.event_name == 'push' }}

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and Push Docker Image
        id: build-and-push
        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64
          build-args: VERSION=${{ env.VERSION }}
          provenance: false

      # Sign the resulting Docker image digest except on PRs
      # https://github.com/sigstore/cosign
      - name: Sign the Published Docker Image
        if: ${{ github.event_name != 'pull_request' }}
        env:
          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
          TAGS: ${{ steps.meta.outputs.tags }}
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        # This step uses the identity token to provision an ephemeral certificate
        # against the sigstore community Fulcio instance.
        run: echo ${{ steps.meta.outputs.tags }} | tr ',' '\n' | xargs -I {} cosign sign --yes {}@${DIGEST}

  deploy:
    needs: build
    runs-on: ubuntu-latest
    if: github.event_name != 'pull_request'
    steps:
      - name: Deploy to Server
        uses: appleboy/ssh-action@7eaf76671a0d7eec5d98ee897acda4f968735a17 # v1.2.0
        with:
          host: ${{ secrets.SSH_HOST }}
          port: ${{ secrets.SSH_PORT }}
          username: ${{ secrets.SSH_USERNAME }}
          key: ${{ secrets.SSH_KEY }}
          script: |
            cd ${{ vars.PROJECT_PATH }}

            # Remove the old container and unused images
            sudo docker compose down
            sudo docker image prune -a -f

            # Update the image tag in docker-compose.yml
            sed -i "s|image: ghcr.io/${{ env.IMAGE_NAME }}:.*|image: ghcr.io/${{ env.IMAGE_NAME }}:${{ needs.build.outputs.version }}|g" docker-compose.yml

            # Pull the new image and restart the service
            sudo docker pull ghcr.io/${{ env.IMAGE_NAME }}:${{ needs.build.outputs.version }}
            sudo docker compose up -d