labs/tidepool/src/exports/packages.nix

{ config, lib }:
let
  lib' = config.lib;
in
{
  options = {
    exports.packages = lib.options.create {
      type = lib.types.attrs.of (lib'.types.raw);
      default.value = { };
    };

    exported.packages = lib.options.create {
      type = lib.types.attrs.of (lib.types.attrs.of lib.types.derivation);
      default.value = { };
    };
  };

  config = {
    exported.packages =
      let
        all = lib.attrs.generate lib'.systems.doubles.all (
          system:
          let
            all = builtins.mapAttrs (
              name: package:
              let
                result = lib'.packages.build package system system system;
              in
              result
            ) config.exports.packages;

            available = lib.attrs.filter (name: package: builtins.elem system package.meta.platforms) all;

            packages = builtins.mapAttrs (name: package: package.package) available;
          in
          packages
        );

        available = lib.attrs.filter (
          system: packages: builtins.length (builtins.attrNames packages) != 0
        ) all;
      in
      available;
  };
}