Is it possible to use this alongside node2nix?

[driusan]

I'm trying to build a package for a PHP app that uses composer for managing php dependencies and npm for managing javascript dependencies. I'm able to use either node2nix or this repo to independently to have nix-build build either the PHP or the js dependencies, but I haven't been able to find any way to compose the two to build a package with which derives both the javascript and php dependencies at the same time.

Is there a way to use the derivations from the two x2nix programs at the same time? (I'm fairly new to nix so I may be missing something obvious.)

[charlieshanley]

For posterity, here's the general contour of what I did when I had this use case:

let
  npmPackage = (callPackage ./deps/node-composition.nix {}).package.override {
    postInstall = ''
      npm run build
    '';
  };
  phpPackage = callPackage ./deps/php-composition.nix { noDev = true; };
in
  # Compose the npm and php packages together
  runCommand "package-with-js-and-php-deps" {} ''
    mkdir $out
    ${rsync}/bin/rsync -a ${npmPackage}/lib/node_modules/package/ ${phpPackage}/ $out
  ''

[svanderburg]

At the moment this is not possible without any hacks/workarounds. However, I have some future plans to also allow substituting dependencies before npm/composer is invoked. I'm already working on it for a while, but it is going to take time -- it requires some major re-architecting to make this happen.