check-upstream.yaml

name: Check Upstream Releases

on:
  schedule:
    - cron: '0 6 * * *'  # Run daily at 6 AM UTC
  workflow_dispatch:  # Allow manual trigger

jobs:
  check-upstream:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          ref: stable

      - name: Get latest upstream tag
        id: upstream
        run: |
          # Fetch tags from upstream repository
          LATEST_TAG=$(git ls-remote --tags --sort=-v:refname \
            https://github.com/lemonade-sdk/lemonade.git \
            | grep -oP 'refs/tags/\K[^{}]+$' \
            | head -n 1)

          echo "Latest upstream tag: $LATEST_TAG"
          echo "tag=$LATEST_TAG" >> $GITHUB_OUTPUT

      - name: Get current source-tag from snapcraft.yaml
        id: current
        run: |
          # Extract current source-tag if it exists
          CURRENT_TAG=$(grep -oP '^\s+source-tag:\s*\K.*' snap/snapcraft.yaml || echo "")
          echo "Current source-tag: $CURRENT_TAG"
          echo "tag=$CURRENT_TAG" >> $GITHUB_OUTPUT

      - name: Check if update is needed
        id: check
        run: |
          if [ "${{ steps.upstream.outputs.tag }}" != "${{ steps.current.outputs.tag }}" ]; then
            echo "Update needed: ${{ steps.current.outputs.tag }} -> ${{ steps.upstream.outputs.tag }}"
            echo "update_needed=true" >> $GITHUB_OUTPUT
          else
            echo "Already up to date"
            echo "update_needed=false" >> $GITHUB_OUTPUT
          fi

      - name: Update snapcraft.yaml
        if: steps.check.outputs.update_needed == 'true'
        run: |
          NEW_TAG="${{ steps.upstream.outputs.tag }}"

          # Check if source-tag already exists in the lemonade part
          if grep -q '^\s\+source-tag:' snap/snapcraft.yaml; then
            # Update existing source-tag
            sed -i "s/^\(\s\+source-tag:\s*\).*/\1$NEW_TAG/" snap/snapcraft.yaml
          else
            # Add source-tag after source-subdir line in lemonade part
            sed -i "/^\s\+source-subdir: src\/app/a\\    source-tag: $NEW_TAG" snap/snapcraft.yaml
          fi

          echo "Updated snapcraft.yaml to use tag: $NEW_TAG"
          cat snap/snapcraft.yaml

      - name: Create Pull Request
        if: steps.check.outputs.update_needed == 'true'
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "Update to upstream ${{ steps.upstream.outputs.tag }}"
          title: "Update to upstream ${{ steps.upstream.outputs.tag }}"
          body: |
            Automated update to track upstream release.

            **Changes:**
            - Updated source-tag from `${{ steps.current.outputs.tag }}` to `${{ steps.upstream.outputs.tag }}`

            **Upstream release:**
            https://github.com/lemonade-sdk/lemonade/releases/tag/${{ steps.upstream.outputs.tag }}
          branch: update-upstream-${{ steps.upstream.outputs.tag }}
          delete-branch: true