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
      - uses: cachix/install-nix-action@v31
      - name: Update nix releases
        run: |
          latest_nix=$(
            curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              https://api.github.com/repos/NixOS/nix/releases/latest |
            grep '"tag_name":' |
            sed -E 's/.*"v?([^"]+)".*/\1/'
          )
          sed -i -E "s/nix_version=[0-9.]+/nix_version=${latest_nix}/" ./install-nix.sh
      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v7
        with:
          title: Update nix versions
          labels: dependencies