name: watchtower-update

on:
  workflow_dispatch:
  schedule:
  - cron:  '00 12 * * *'

jobs:
  watchtower-update:
    name: update watchtower
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v5
    - name: Run watchtower-container-update
      run: |
        # Watchtower
        watchtower_version="$(
          git ls-remote https://github.com/nicholas-fedor/watchtower v* \
            | cut -d/ -f3 \
            | sort -V \
            | grep -E "^v[0-9\.]+$" \
            | tail -1
        )"
        watchtower_commit_hash="$(git ls-remote https://github.com/nicholas-fedor/watchtower $watchtower_version | sed 's/refs.*//')"
        sed -i "s|^ENV WATCHTOWER_COMMIT_HASH.*$|ENV WATCHTOWER_COMMIT_HASH=$watchtower_commit_hash|" ./Containers/watchtower/Dockerfile
        sed -i "s|\$WATCHTOWER_COMMIT_HASH.*$|\$WATCHTOWER_COMMIT_HASH # $watchtower_version|" ./Containers/watchtower/Dockerfile
        
    - name: Create Pull Request
      uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7
      with:
        commit-message: watchtower-update automated change
        signoff: true
        title: watchtower container update
        body: Automated watchtower container update
        labels: dependencies, 3. to review
        milestone: next
        branch: watchtower-container-update