name: update

on:
  schedule:
    - cron: '0 0 * * *'
  workflow_dispatch:

jobs:
  update:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - name: Install jq
        run: nix profile install nixpkgs#jq
      - name: Get current version
        id: current-version
        run: nix-instantiate --eval --json -A dzgui.version | jq -r '"version=\"\(.)\""' >> $GITHUB_OUTPUT
      - name: Run update script
        run: ./package/update.sh
      - name: Get new version
        id: new-version
        run: nix-instantiate --eval --json -A dzgui.version | jq -r '"version=\"\(.)\""' >> $GITHUB_OUTPUT
      - name: Check for changes
        id: git-check
        run: |
          git diff --exit-code || echo "changes=true" >> $GITHUB_OUTPUT
      - name: Build new package
        run: nix build -L
      - name: Create Pull Request
        if: ${{ steps.current-version.outputs.version != steps.new-version.outputs.version }}
        uses: peter-evans/create-pull-request@v5
        with:
          base: main
          add-paths: ./package/
          commit-message: update ${{ steps.current-version.outputs.version }} -> ${{ steps.new-version.outputs.version }}
          title: '[Automated] Update dzgui ${{ steps.new-version.outputs.version }}'
          body: 'Automated changes by GitHub Actions'
          branch: automated-update
          delete-branch: true