bitcoin-build-publish.yml

name: Build, Publish & Release (Bitcoin Core)

on:
  workflow_dispatch: {}
  schedule:
    - cron: "17 5 * * *"  # daily

concurrency:
  group: btc-bitcoin
  cancel-in-progress: false

env:
  DOCKERHUB_REPO: magicdude4eva/btc-bitcoin
  DOCKER_CONTEXT: .
  DOCKERFILE_PATH: bitcoin/Dockerfile
  PLATFORM: linux/amd64

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: write   # needed to create a GitHub Release
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Detect latest Bitcoin Core version (from /en/download/)
        id: latest
        run: |
          set -euo pipefail
          html=$(curl -fsSL https://bitcoincore.org/en/download/)
          ver=$(printf "%s" "$html" \
            | grep -Eo 'Latest version: *[0-9]+(\.[0-9]+)+' \
            | head -n1 | sed -E 's/.*:[[:space:]]*//')
          # Fallback to /en/releases/ if needed
          if [ -z "${ver:-}" ]; then
            rel=$(curl -fsSL https://bitcoincore.org/en/releases/)
            ver=$(printf "%s" "$rel" \
              | grep -Eo 'Bitcoin Core [0-9]+(\.[0-9]+)+' \
              | head -n1 | sed -E 's/Bitcoin Core //')
          fi
          test -n "$ver"
          echo "version=$ver" >> "$GITHUB_OUTPUT"
          echo "Latest detected: $ver"

      - name: Skip if tag already on Docker Hub
        id: hubcheck
        run: |
          set -euo pipefail
          ver='${{ steps.latest.outputs.version }}'
          code=$(curl -s -o /dev/null -w "%{http_code}" \
            "https://hub.docker.com/v2/repositories/${{ env.DOCKERHUB_REPO }}/tags/${ver}")
          echo "hub_status=$code" >> "$GITHUB_OUTPUT"
          if [ "$code" = "200" ]; then
            echo "skip=true" >> "$GITHUB_OUTPUT"
            echo "Tag $ver already exists - skipping."
          else
            echo "skip=false" >> "$GITHUB_OUTPUT"
            echo "Tag $ver not found - will build."
          fi

      - name: Set up Buildx
        if: steps.hubcheck.outputs.skip == 'false'
        uses: docker/setup-buildx-action@v3

      - name: Log in to Docker Hub
        if: steps.hubcheck.outputs.skip == 'false'
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Build and push Docker image
        if: steps.hubcheck.outputs.skip == 'false'
        id: build
        uses: docker/build-push-action@v6
        with:
          context: ${{ env.DOCKER_CONTEXT }}
          file: ${{ env.DOCKERFILE_PATH }}
          platforms: ${{ env.PLATFORM }}
          push: true
          build-args: |
            BITCOIN_VERSION=${{ steps.latest.outputs.version }}
          tags: |
            ${{ env.DOCKERHUB_REPO }}:latest
            ${{ env.DOCKERHUB_REPO }}:${{ steps.latest.outputs.version }}
          labels: |
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.version=${{ steps.latest.outputs.version }}
            org.opencontainers.image.title=btc-bitcoin
            org.opencontainers.image.description=Bitcoin Core full node image for Synology NAS

      - name: Prepare release artifacts
        if: steps.hubcheck.outputs.skip == 'false'
        run: |
          set -euo pipefail
          echo "${{ steps.latest.outputs.version }}" > bitcoin-version.txt
          # build-push-action outputs .digest for the manifest list/image
          echo "${{ steps.build.outputs.digest }}" > image-digest.txt


      - name: Update Docker Hub description from ./bitcoin/README.md
        if: steps.hubcheck.outputs.skip == 'false'
        uses: peter-evans/dockerhub-description@v4
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
          repository: ${{ env.DOCKERHUB_REPO }}
          readme-filepath: ./bitcoin/README.md
          short-description: Bitcoin Core full node image for Synology NAS, tailored for local solo mining and full validation
          
      - name: Create GitHub Release
        if: steps.hubcheck.outputs.skip == 'false'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: bitcoin-${{ steps.latest.outputs.version }}
          name: Bitcoin Core ${{ steps.latest.outputs.version }}
          target_commitish: ${{ github.sha }}
          generate_release_notes: true
          body: |
            New Bitcoin Core image published.

            Version: **${{ steps.latest.outputs.version }}**
            Docker Hub:
            - https://hub.docker.com/r/${{ env.DOCKERHUB_REPO }}/tags?name=${{ steps.latest.outputs.version }}
            - https://hub.docker.com/r/${{ env.DOCKERHUB_REPO }}/tags?name=latest

            Image digest:
            ```
            ${{ steps.build.outputs.digest }}
            ```
          files: |
            bitcoin-version.txt
            image-digest.txt