# SPDX-License-Identifier: CC0-1.0

{
  edition = 201909;

  description = "Genode packages";

  inputs = {
    genode-depot.uri = "git+https://git.sr.ht/~ehmry/genode-depot";
    nixpkgs.uri = "github:ehmry/nixpkgs";
    nixpkgsUpstream.uri = "github:NixOS/nixpkgs";
  };

  outputs = { self, genode-depot, nixpkgs, nixpkgsUpstream }:
    let
      mkOutput = { system, localSystem, crossSystem }:
        let thisSystem = builtins.getAttr system;
        in rec {

          lib = (nixpkgs.lib) // (import ./lib {
            inherit system localSystem crossSystem;
            inherit apps nixpkgs genode-depot;
            genodepkgs = self;
          });

          legacyPackages = thisSystem nixpkgs.legacyPackages;
          # pass thru Nixpkgs

          packages = import ./packages {
            inherit system legacyPackages apps;
            localPackages = nixpkgsUpstream.legacyPackages.${localSystem};
            depot = thisSystem genode-depot.packages;
          };

          devShell = legacyPackages.mkShell {
            nativeBuildInputs = [
              nixpkgs.legacyPackages.${localSystem}.dhall
              packages.dhallGenode
            ];
          };

          apps = import ./apps {
            self = self.apps.${localSystem};
            nixpkgs = legacyPackages;
            nixpkgsLocal = nixpkgsUpstream.legacyPackages.${localSystem};
            inherit packages;
          };

          checks = import ./tests {
            inherit system localSystem crossSystem;
            inherit self nixpkgs genode-depot;
            inherit apps lib;
            genodepkgs = thisSystem self.packages;
          };

        };

      localSystems = [ "x86_64-linux" ];
      crossSystems = [ "x86_64-genode" ];

      forAllCrossSystems = f:
        with builtins;
        let
          f' = localSystem: crossSystem:
            let system = localSystem + "-" + crossSystem;
            in {
              name = system;
              value = f { inherit system localSystem crossSystem; };
            };
          list = nixpkgs.lib.lists.crossLists f' [ localSystems crossSystems ];
          attrSet = listToAttrs list;
        in attrSet;

      finalize = outputs:
        with builtins;
        let
          outputs' = outputs // {
            x86_64-linux = getAttr "x86_64-linux-x86_64-genode" outputs;
          };
          systems = attrNames outputs';
          outputAttrs = attrNames (head (attrValues outputs'));

          list = map (attr: {
            name = attr;
            value = listToAttrs (map (system: {
              name = system;
              value = getAttr attr (getAttr system outputs');
            }) systems);
          }) outputAttrs;

        in listToAttrs list;

      final = finalize (forAllCrossSystems mkOutput);

    in final;
}