name: Check Flake

on: [push]

env:
  DEBIAN_FRONTEND: noninteractive

jobs:
  check-flake:
    runs-on: ubuntu-latest
    container: ubuntu:latest
    steps:
      - name: Install sudo
        run: apt-get update && apt-get install -y --no-install-recommends sudo curl ca-certificates

      - name: Install Nix
        uses: https://github.com/cachix/install-nix-action@v20

      - name: Checkout the repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Get ENV var names
        run: printenv | cut -d'=' -f1

      - name: Check Flake
        run: nix flake check --show-trace