flake.nix


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{
  description = "Minimal Gio (gioui.org) development environment with Go support";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
          config.allowUnfree = true;
        };

        gioDeps = with pkgs; [
          go
          gopls
          git
          pkg-config
          # X11 + Wayland deps
          xorg.libX11
          xorg.libXcursor
          xorg.libXrandr
          xorg.libXinerama
          xorg.libXi
          xorg.libXext
          libGL
          wayland
          wayland-protocols
          libxkbcommon
          # Text rendering
          cairo
          pango
          harfbuzz
          freetype
          fontconfig
        ];
      in
      {
        devShells.default = pkgs.mkShell {
          name = "gio-dev";
          packages = gioDeps;

          shellHook = ''
            export CGO_ENABLED=1
            export PKG_CONFIG_PATH=${pkgs.lib.makeSearchPath "lib/pkgconfig" gioDeps}
            export GIO_USE_WAYLAND=1
            echo "✅ Gio development shell ready."
            echo "Run 'go run .' to start your app."
          '';
        };

        apps.default = {
          type = "app";
          program = "${pkgs.go}/bin/go run .";
        };
      }
    );
}