language: nix

cache:
  directories:
  - $HOME/nix.store

before_cache:
  - mkdir -p $HOME/nix.store
  - nix copy --to file://$HOME/nix.store -f default.nix buildInputs

before_install:
  - sudo mkdir -p /etc/nix
  - echo "substituters = https://cache.nixos.org/ file://$HOME/nix.store" | sudo tee -a /etc/nix/nix.conf > /dev/null
  - echo 'require-sigs = false' | sudo tee -a /etc/nix/nix.conf > /dev/null

before_script:
  # Make sure that version is up-to-date
  - sed -i "s/version = .*/version = \"$(git describe --abbrev=0 --tags | sed 's/v//')\";/" default.nix

script:
  - nix-build --option sandbox true