name: "Update nix"
on:
  repository_dispatch:
  workflow_dispatch:
  schedule:
    - cron: "31 2 * * *"
jobs:
  update-nix-releases:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Update nix releases
        env:
         GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          latest_nix=$(
            gh api repos/NixOS/nix/tags --paginate --jq '.[].name' |
            grep -E '^[0-9]+\.[0-9]+\.[0-9]+$' |
            sort -V |
            tail -n 1
          )
          if [ -z "$latest_nix" ]; then
            echo "Failed to determine latest Nix version." >&2
            exit 1
          fi
          sed -i -E "s/nix_version=[0-9.]+/nix_version=${latest_nix}/" ./install-nix.sh
      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v7
        with:
          title: Update nix versions
          labels: dependencies