flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    systems.url = "github:nix-systems/default";
    treefmt-nix.url = "github:numtide/treefmt-nix";
  };

  outputs =
    {
      self,
      systems,
      nixpkgs,
      treefmt-nix,
      ...
    }:
    let
      inherit (nixpkgs) lib;
      eachSystem = f: lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});

      treefmtEval = eachSystem (pkgs: treefmt-nix.lib.evalModule pkgs ./treefmt.nix);
    in
    {
      devShells = eachSystem (pkgs: {
        default = pkgs.mkShell {
          packages = with pkgs; [
            gopls
            wails
          ];

          # Fixes a fontsize bug, see https://wails.io/docs/next/guides/nixos-font
          shellHook = with pkgs; ''
            export XDG_DATA_DIRS=${gsettings-desktop-schemas}/share/gsettings-schemas/${gsettings-desktop-schemas.name}:${gtk3}/share/gsettings-schemas/${gtk3.name}:$XDG_DATA_DIRS;
            export GIO_MODULE_DIR="${pkgs.glib-networking}/lib/gio/modules/";
          '';
        };
      });

      formatter = eachSystem (pkgs: treefmtEval.${pkgs.system}.config.build.wrapper);

      checks = eachSystem (pkgs: {
        formatting = treefmtEval.${pkgs.system}.config.build.check self;
      });
    };
}