shell.nix

# This allows overriding nixpkgs by passing `--arg pkgs ...`
{ pkgs ? import ./devtools/lib/nix/nixpkgs.nix {}
, lib ? pkgs.lib
}:

with pkgs;
with lib;

let

  # ruby environment defines an environment suitable for development in Ruby.
  # To keep gemset.nix in sync with the Gemfile, please run:
  # k2web vendor
  rubyEnv = bundlerEnv {
    ruby = ruby_2_3;

    gemdir = ./.;

    groups = [ "default" "production" "development" "test" ];
    name = "k2_web-env";
  };

in gccStdenv.mkDerivation {
  name = "keeptruckin-development-environment";
  buildInputs = [
    # The ruby environment
    bundix
    rubyEnv.wrappedRuby
    rubyEnv.basicEnv
    rubyEnv.bundler

    # TODO: this does not work: *** Ruby 'env' attributes are intended for interactive nix-shell sessions, not for building! ***
    # rubyEnv.env

    # Gem dependencies
    libxml2        # dependency of the nokogiri Gem
    postgresql     # dependency of the pg Gem
    sqlite         # dependency of the sqlite3 Gem

    openssl
  ] ++ optional stdenv.isDarwin [
    docker-machine
  ] ++ optional stdenv.isLinux [
    # TODO: make wkhtmltopdf compatible with Mac!
    wkhtmltopdf
  ];

  phases = ["nobuildPhase"];

  nobuildPhase = ''
    echo
    echo "This derivation is not meant to be built, aborting";
    echo
    exit 1
  '';
}

# (bundlerEnv rec {
#   ruby = ruby_2_3;
#
#   gemdir = ./.;
#
#   groups = [ "default" "production" "development" "test" ];
#   name = "k2_web-env";
#
#   stdenv = gccStdenv;
#
#   buildInputs = [
#      bundix
#
#      # Gem dependencies
#      libxml2        # dependency of the nokogiri Gem
#      postgresql     # dependency of the pg Gem
#      sqlite         # dependency of the sqlite3 Gem
#
#      openssl
#    ] ++ optional stdenv.isDarwin [
#      docker-machine
#    ] ++ optional stdenv.isLinux [
#      # TODO: make wkhtmltopdf compatible with Mac!
#      wkhtmltopdf
#    ];
# }).env