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 = ruby_2_3;

in stdenv.mkDerivation {
  name = "keeptruckin-development-environment";
  buildInputs = [
    # The ruby environment
    ruby.devEnv

    # 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

    # Gem dependencies
    libiconv       # dependency of the nokogiri Gem
  ] ++ optional stdenv.isLinux [
    # TODO: make wkhtmltopdf compatible with Mac!
    wkhtmltopdf
  ];

  shellHook = ''
    export BUNDLE_BUILD__LIBV8="--with-system-v8"
    export BUNDLE_BUILD__SQLITE3-RUBY="--with-sqlite3-include=${getDev sqlite}/include --with-sqlite3-lib=${getDev sqlite}/lib"
  '';

  phases = ["nobuildPhase"];

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