flake.nix

{
  description = "A Nix-flake-based Go 1.22 development environment";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs";

  outputs = {
    self,
    nixpkgs,
  }: let
    goVersion = 23;

    supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
    forEachSupportedSystem = f:
      nixpkgs.lib.genAttrs supportedSystems (system:
        f {
          pkgs = import nixpkgs {
            inherit system;
            overlays = [self.overlays.default];
          };
        });
  in {
    overlays.default = final: prev: {
      go = final."go_1_${toString goVersion}";
    };

    devShells = forEachSupportedSystem ({pkgs}: {
      default = pkgs.mkShell {
        packages = with pkgs; [
          # go (version is specified by overlay)
          go

          # goimports, godoc, etc.
          gotools

          # https://github.com/golangci/golangci-lint
          golangci-lint
        ];
      };
    });
  };
}