.travis.yml

language: nix
nix: 2.3.4
dist: xenial
os: linux


env:
  global:
    # Set this to cache your build results in cachix for faster builds
    # in travis and for everyone who uses your cache.
    #
    # Format: Your cachix cache host name without the ".cachix.org" suffix.
    # Example: mycache (for mycache.cachix.org)
    #
    # For this to work, you also need to set the  CACHIX_SIGNING_KEY
    # in your repository settings in Travis.
    - CACHIX_CACHE=scott-hamilton
      # Set this to notify the global nur package registry that changes are
      # available.
      #
      # The repo name as used in
      # https://github.com/nix-community/NUR/blob/master/repos.json
    - NUR_REPO=shamilton
      # Certain packages are marked as broken to disable NUR from building them,
      # we want them to build build anyways as they're still useful
    - NIXPKGS_ALLOW_BROKEN=1
    - NIXPKGS_ALLOW_UNFREE=1

branches:
  only:
    - master

matrix:
  include:
    - env: NIXOS_VERSION=master NIX_CHANNEL=nixos-21.05
    - env: NIXOS_VERSION=nixos-unstable NIX_CHANNEL=nixos-unstable
    - env: NIXOS_VERSION=nixpkgs-unstable NIX_CHANNEL=nixpkgs-unstable 

install:
  - nix --version
    # for cachix we need travis to be a trusted nix user
  - echo "trusted-users = $USER" | sudo tee -a /etc/nix/nix.conf
  - sudo systemctl restart nix-daemon
  - travis_retry nix-channel --update
  - nix-env -iA cachix -f https://cachix.org/api/v1/install
  - cachix authtoken "${CACHIX_AUTH_TOKEN}"
  - cachix use "${CACHIX_CACHE}"
  - nix-channel --add "https://nixos.org/channels/${NIX_CHANNEL}" "${NIX_CHANNEL}"
  - travis_retry nix-channel --update

before_script:
  - sudo mkdir -p /etc/nix && echo 'sandbox = true' | sudo tee /etc/nix/nix.conf
  - ls -lh $HOME/.nix-defexpr/channels
  - export NIX_PATH=$HOME/.nix-defexpr/channels:$NIX_PATH

script:
  - echo "${NIX_PATH}"
  - nix-channel --list
  - nix-build --arg pkgs "import <${NIX_CHANNEL}> {}" --argstr nixosVersion "${NIXOS_VERSION}" all-unbroken.nix
  - nix eval --arg pkgs "import <${NIX_CHANNEL}> {}" --argstr nixosVersion "${NIXOS_VERSION}" -f default.nix 'lib'
  - nix eval --arg pkgs "import <${NIX_CHANNEL}> {}" --argstr nixosVersion "${NIXOS_VERSION}" -f default.nix 'modules'
  - nix eval --arg pkgs "import <${NIX_CHANNEL}> {}" --argstr nixosVersion "${NIXOS_VERSION}" -f default.nix 'overlays'

after_success:
  - nix-build --argstr nixosVersion "${{ matrix.channel-branch }}" all-unbroken.nix | cachix push "${CACHIX_CACHE}"
  - if [ "cron" != "${TRAVIS_EVENT_TYPE}" -a "false" = "${TRAVIS_PULL_REQUEST}" -a "master" = "${TRAVIS_BRANCH}" ]; then
    curl -XPOST "https://nur-update.herokuapp.com/update?repo=${NUR_REPO}"; fi