sync-and-apply-patches.yml

name: Sync, Tag, Build and Publish Docker Image
run-name: Patch and build ${{ github.event_name == 'schedule' && 'latest upstream tag' || inputs.tag }}

on:
  schedule:
    - cron: '0 0 * * *' # Daily at midnight
  workflow_dispatch:
    inputs:
      tag:
        description: 'Specify a tag (optional)'
        required: false
        default: ''

jobs:
  sync-and-patch:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    outputs:
      tag: ${{ steps.determine-tag.outputs.tag }}
    steps:
      # Step to checkout the 'ci' branch with patches
      - name: Checkout ci branch
        uses: actions/checkout@v3
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          ref: ci
          fetch-depth: 0

      # Step to back up patches
      - name: Backup patches
        run: |
          mkdir -p $HOME/patches-backup
          cp patches/*.patch $HOME/patches-backup/

      # Step to check out the repository's default branch
      - name: Checkout default branch
        uses: actions/checkout@v3
        with:
          token: ${{ secrets.PAT_TOKEN }}
          fetch-depth: 0

      # Step to set up Git
      - name: Set up Git
        run: |
          git config --global user.name 'Bart van der Braak'
          git config --global user.email 'bartvdbraak@users.noreply.github.com'

      # Step to add upstream and fetch tags
      - name: Add upstream and fetch tags
        run: |
          git remote add upstream ${{ env.UPSTREAM }}
          # Prune tags from the fork to prevent conflicts
          git tag -l | xargs -n 1 git tag -d
          git fetch upstream --tags
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          UPSTREAM: https://github.com/go-gitea/gitea.git

      # Step to find the tag to use (input or latest)
      - name: Determine tag
        id: determine-tag
        run: |
          if [ -n "${{ github.event.inputs.tag }}" ]; then
            echo "Using manually specified tag: ${{ github.event.inputs.tag }}"
            echo "tag=${{ github.event.inputs.tag }}" >> $GITHUB_OUTPUT
          else
            echo "Finding the latest stable tag..."
            latest_tag=$(git tag -l "v*" --sort=-v:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' | head -n 1)
            echo "Latest stable tag: $latest_tag"
            echo "tag=$latest_tag" >> $GITHUB_OUTPUT
          fi

      # Step to create a branch from the determined tag
      - name: Create branch from determined tag
        run: |
          git checkout -b apply-patches-${{ steps.determine-tag.outputs.tag }} ${{ steps.determine-tag.outputs.tag }}

      # Step to apply patches and push partial progress if any apply
      - name: Apply patches and handle partial progress
        id: apply_patches
        run: |
          successful_patches=()
          failed_patches=()

          for patch in $HOME/patches-backup/*.patch; do
            echo "Applying $patch..."
            if git am --3way "$patch"; then
              echo "Successfully applied $patch"
              successful_patches+=("$(basename "$patch")")
            else
              echo "Failed to apply patch: $patch"
              git am --abort
              failed_patches+=("$(basename "$patch")")
              break # Stop further patch application
            fi
          done

          echo "successful_patches=${successful_patches[@]}" >> $GITHUB_ENV
          echo "failed_patches=${failed_patches[@]}" >> $GITHUB_ENV

          # Push the branch even if only some patches were applied
          git push -f https://github.com/${{ github.repository }}.git HEAD
        env:
          PAT_TOKEN: ${{ secrets.PAT_TOKEN }}

      # Step to create a tag on the last commit of the patch branch
      - name: Create a tag on the last commit
        run: |
          git tag -d "${{ steps.determine-tag.outputs.tag }}" || echo "Tag does not exist locally, skipping delete."
          git tag -a "${{ steps.determine-tag.outputs.tag }}" -m "Tagging version ${{ steps.determine-tag.outputs.tag }} after applying patches"
          git push origin "${{ steps.determine-tag.outputs.tag }}"

  build:
    runs-on: ubuntu-latest
    needs: sync-and-patch

    permissions:
      contents: read  # Read access to repository contents (required to access Dockerfile)
      packages: write  # Write access to GHCR (required to publish Docker images)
      id-token: write  # Needed for GHCR authentication

    steps:
      # Set up Docker Buildx
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      # Log in to GitHub Container Registry
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Checkout the specific tag
      - name: Checkout tag
        uses: actions/checkout@v3
        with:
          ref: ${{ needs.sync-and-patch.outputs.tag }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          push: true
          tags: ghcr.io/${{ github.repository }}:${{ needs.sync-and-patch.outputs.tag }}