name: Update lockfiles

on:
  schedule:
    # run every friday
    - cron: "0 0 * * 5"
  workflow_dispatch:

jobs:
  update:
    name: Run update
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Install Nix
        uses: cachix/install-nix-action@v25

      - name: Set Git user info
        run: |
          git config user.name 'github-actions[bot]'
          git config user.email 'github-actions[bot]@users.noreply.github.com'

      - name: Create new branch
        id: branch
        run: |
          # try not to conflict with other branches
          branch="update-lock/${{ github.run_id }}"

          echo "branch=$branch" >> "$GITHUB_OUTPUT"
          git switch -c "$branch"

      - name: Update flake inputs
        run: |
          pushd dev

          nix flake update \
            --commit-lock-file \
            --commit-lockfile-summary "chore: update dev flake inputs"

          popd

      - name: Update upstream sources
        run: |
          nix run --inputs-from ./dev nixpkgs#nvfetcher

          if ! git diff --color=always --exit-code; then
            git commit -am "chore: update nvfetcher sources"
          fi

      - name: Make PR if needed
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if ! git diff --color=always --exit-code origin/main; then
            git push -u origin ${{ steps.branch.outputs.branch }}

            gh pr create \
              --base main \
              --head "${{ steps.branch.outputs.branch }}" \
              --title "chore: update lockfiles" \
              --fill
          fi
