Example for package that uses npm to build artifacts

[michaelpj]

I've been struggling all day with a package that uses npm scripts to produce bundled artifacts, rather than being used directly via npm install.

I found it pretty difficult to work out how to use the tooling here for that - an example in the README would go a long way.

[pierrebeaucamp]

I'm also trying to figure this out at the moment. Would appreciate some directions

[svanderburg]

I just briefly checked the package and the NPM deployment seems to work. However, I assume that you also want to create a Zip package with:

npm run package

Can you clarify this a bit?

[michaelpj]

I'm mainly just struggling to work out how to create a nice nix derivation that produces the artifacts output by npm run package (there are various issues with dependencies, but I can deal with those). It's not clear to me how to say something like "run this command in the source tree having run npm install", or something equivalent.

This may in fact be easy, which is why I'm mainly asking for an example!

[svanderburg]

Can't you do something like this? First generate the expressions with node2nix, then add an override expression named override.nix that does something like this:

{ nixpkgs ? <nixpkgs>
, system ? builtins.currentSystem
}:

(import ./default.nix {
  pkgs = import nixpkgs { inherit system; };
  inherit system;
}).package.override {
  postInstall = ''
    patchShebangs node_modules
    npm run package
  '';
}

I was not able to fully deploy the package because for some mysterious reason webpack terminates with exit status 2.

[CMCDragonkai]

Just a question, are we meant to be using override instead of overrideAttrs or is there a special override just for Node packages like we have with the Python infrastructure overridePythonAttrs?