turboprop/lib/builders.nix

{pkgs}: let
  genericBuilder = {
    namespace,
    name,
    version,
    url,
    hash,
    src,
    installPhase,
    ...
  }:
    pkgs.stdenv.mkDerivation {
      inherit version installPhase src;
      pname = "${namespace}-${name}";
      phases = ["installPhase"];
    };
in {
  yamlFile = attrs:
    genericBuilder (attrs
      // {
        src = pkgs.fetchurl {inherit (attrs) url hash;};
        installPhase = "cp -v $src $out";
      });

  gitChart = {
    chartPath,
    vPrefixInRef ? false,
    ...
  } @ attrs:
    genericBuilder (attrs
      // {
        src = pkgs.fetchgit {
          inherit (attrs) url hash;
          rev =
            if vPrefixInRef
            then "v${attrs.version}"
            else attrs.version;
          sparseCheckout = [chartPath];
        };
        installPhase = ''
          cp -rv $src/${chartPath} $out
        '';
      });
}