sloc.nix

{ pkgs ? import /home/matej/workarea/nixpkgs {} }:

let
  # When upgrading node.nix / node packages:
  #   fetch package.json from package's repository
  #   run `npm2nix package.json node.nix`
  #   and replace node.nix with new one
  nodePackages = import /home/matej/workarea/nixpkgs/pkgs/top-level/node-packages.nix {
    inherit pkgs;
    inherit (pkgs) stdenv nodejs fetchurl fetchgit;
    neededNatives = [ pkgs.python ] ++ pkgs.lib.optional pkgs.stdenv.isLinux pkgs.utillinux;
    self = nodePackages;
    generated = ./node_modules.nix;
  };

  node_env = pkgs.buildEnv {
    name = "node_env";
    paths = [ nodePackages.commander nodePackages.async nodePackages.readdirp
      nodePackages."cli-table" ];
    pathsToLink = [ "/lib" ];
  };

in pkgs.stdenv.mkDerivation rec {
    name = "sloc-${version}";
    version = "0.1.4";

    src = pkgs.fetchgit {
        url = "https://github.com/flosse/sloc";
        rev = "refs/tags/v${version}";
        sha256 = "163qpabzs8hjw2fhz7y493n04l4v5spmb37383kl0l12fk16jkg3";
      };

    buildInputs = [ pkgs.makeWrapper pkgs.nodePackages.coffee-script ];

    dontBuild = true;

    installPhase = ''
      ensureDir $out
      
      cp -r ./bin $out/bin
      cp -r ./package.json $out/package.json
      
      coffee -c -o $out/lib ./src
      
      wrapProgram $out/bin/sloc \
        --prefix NODE_PATH : ${node_env}/lib/node_modules
    '';

    postFixup = ''
    '';
  }