poll-new-releases.yml

name: Build and Push Custom Caddy Container

on:
  schedule:
    - cron: "*/15 * * * *" # Runs every 15 minutes
  workflow_dispatch: # Allows manual trigger

jobs:
  build-and-push-container:
    runs-on: ubuntu-latest

    steps:
      - name: Check Out Repository
        uses: actions/checkout@v3

      - name: Fetch Latest Caddy Release
        id: fetch_release
        run: |
          latest_release=$(curl -s https://api.github.com/repos/caddyserver/caddy/releases/latest)
          echo "$latest_release" > release.json

          # Extract the tag name
          raw_tag=$(jq -r '.tag_name' release.json)
          echo "Raw tag: $raw_tag"

          # Remove the 'v' prefix if present and strip trailing '.0'
          processed_tag=$(echo "$raw_tag" | sed -E 's/^v//; s/\.0$//')
          echo "Processed tag: $processed_tag"

          # Save to environment variable
          echo "latest_tag=$processed_tag" >> $GITHUB_ENV

      - name: Check Current Container Tag
        id: check_current_tag
        run: |
          if curl -s -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
            https://ghcr.io/v2/callumau/caddy-cloudflare/caddy/manifests/latest | jq -r '.annotations."org.opencontainers.image.version"' > /dev/null 2>&1; then
            current_tag=$(curl -s -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              https://ghcr.io/v2/callumau/caddy-cloudflare/caddy/manifests/latest | jq -r '.annotations."org.opencontainers.image.version"')
          else
            current_tag="none"
          fi
          echo "current_tag=$current_tag" >> $GITHUB_ENV

      - name: Compare Tags and Build New Image
        if: env.latest_tag != env.current_tag
        run: |
          echo "New release detected: ${{ env.latest_tag }}"
          docker build \
            --build-arg CADDY_VERSION=${{ env.latest_tag }} \
            -t ghcr.io/callumau/caddy-cloudflare/caddy:${{ env.latest_tag }} \
            -t ghcr.io/callumau/caddy-cloudflare/caddy:latest .

      - name: Push New Image to GHCR
        if: env.latest_tag != env.current_tag
        run: |
          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u USERNAME --password-stdin
          docker push ghcr.io/callumau/caddy-cloudflare/caddy:${{ env.latest_tag }}
          docker push ghcr.io/callumau/caddy-cloudflare/caddy:latest

      - name: No New Release Detected
        if: env.latest_tag == env.current_tag
        run: echo "No new release detected. Skipping build and push."