flake.nix


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{
  description = "Generate constraint-based diagrams";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
  inputs.naersk.url = "github:nix-community/naersk";

  outputs = {
    self,
    nixpkgs,
    naersk,
  }: let
    pkgs = import nixpkgs {
      overlays = [self.overlays.default];
      localSystem = "x86_64-linux";
    };
    naersk-lib = pkgs.callPackage naersk {};
  in {
    overlays.default = final: prev: {
      diaphragm = final.lua5_4.passthru.pkgs.toLuaModule (naersk-lib.buildPackage {
        src = ./.;
        nativeBuildInputs = with final; [pkg-config rustPlatform.bindgenHook];
        buildInputs = with final; [pango z3];

        copyBins = false;
        copyLibs = true;

        postInstall = ''
          mkdir -p $out/lib/lua/5.4 $out/share/lua/5.4

          mv $out/lib/libdiaphragm.so $out/lib/lua/5.4
          cp $src/lua-bindings/diaphragm.lua $out/share/lua/5.4/
        '';
      });
    };

    packages.x86_64-linux.default = pkgs.diaphragm;

    devShell.x86_64-linux = pkgs.mkShell {
      LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";

      buildInputs = with pkgs; [
        pkg-config
        cairo
        gdk-pixbuf
        gtk3
        libxml2
        pango
        z3

        cargo-watch

        lua5_4
        luarocks
        stylua
      ];
    };
  };
}