added go, zig, and ruby, as well as environment

base.nix

@@ -148,11 +148,6 @@
         XDG_STATE_HOME = "\${HOME}/.local/state";
 
         # DEV PATH
-        CARGO_HOME = "${XDG_DATA_HOME}/cargo";
-        GEM_HOME = "${XDG_DATA_HOME}/ruby/gems";
-        GEM_PATH = "${XDG_DATA_HOME}/ruby/gems";
-        GEM_SPEC_CACHE = "${XDG_DATA_HOME}/ruby/specs";
-        GOPATH = "${XDG_DATA_HOME}/go";
         PSQL_HISTORY = "${XDG_DATA_HOME}/psql_history";
         REDISCLI_HISTFILE = "${XDG_DATA_HOME}/redis/rediscli_history";
         WINEPREFIX = "${XDG_DATA_HOME}/wine";
@@ -164,9 +159,6 @@
         "_JAVA_OPTIONS" = "-Djava.util.prefs.userRoot=${XDG_CONFIG_HOME}/java";
         ORG_DEVICE = "workstation";
 
-        # NVIDIA
-        CUDA_CACHE_PATH = "${XDG_CACHE_HOME}/nv";
-
         # WAYLAND
         WLR_NO_HARDWARE_CURSORS = 1;
         NIXOS_OZONE_WL = 1;

flake.nix

@@ -54,6 +54,11 @@
           inherit system;
           config.allowUnfree = true;
         };
+      langList = builtins.filter (name: name != "emacs.nix") (
+        builtins.map (file: builtins.replaceStrings [ ".nix" ] [ "" ] (baseNameOf file)) (
+          builtins.attrNames (builtins.readDir ./modules/dev)
+        )
+      );
       createConfig =
         name: local-nixpkgs:
         let
@@ -86,18 +91,11 @@
         server = createConfig "server" inputs.nixpkgs-small;
         shell = createConfig "shell" inputs.nixpkgs;
       };
-      devShells.${system} = {
-        inherit (self.nixosConfigurations.shell.config.devShells)
-          cc
-          docker
-          haskell
-          javascript
-          julia
-          nix
-          python
-          rust
-          sh
-          ;
-      };
+      devShells.${system} = builtins.listToAttrs (
+        map (lang: {
+          name = lang;
+          value = self.nixosConfigurations.shell.config.devShells.${lang};
+        }) langList
+      );
     };
 }

modules/dev/go.nix

@@ -0,0 +1,45 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  packages = builtins.attrValues {
+    inherit (pkgs)
+      go # Go compiler and core toolchain
+      gocode-gomod # Code completion for Go (modern fork of gocode)
+      gotools # Contains godoc, gorename, goimports, etc.
+      gore # Go REPL
+      gotests # Generate Go tests from function signatures
+      gomodifytags # Struct tag manipulation
+      golangci-lint # Linter aggregation
+      ;
+  };
+  GOPATH = "\${XDG_DATA_HOME}/go";
+in
+{
+  options = {
+    my.dev.go.enable = lib.mkEnableOption "Install Go tooling globally";
+    devShells.go = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.mkShell {
+        inherit packages GOPATH;
+        name = "go-dev-shell";
+        shellHook = ''
+          echo "🐹 Go dev environment"
+        '';
+      };
+      description = "Go development shell with Emacs tooling, REPL, formatter, and linter";
+    };
+  };
+
+  config = lib.mkMerge [
+    {
+      environment.variables = { inherit GOPATH; };
+    }
+    (lib.mkIf config.my.dev.go.enable {
+      users.users.jawz = { inherit packages; };
+    })
+  ];
+}

modules/dev/ruby.nix

@@ -0,0 +1,40 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  packages = builtins.attrValues {
+    inherit (pkgs) ruby; # Ruby interpreter
+    inherit (pkgs.rubyPackages) solargraph; # LSP for Ruby
+  };
+in
+{
+  options = {
+    my.dev.ruby.enable = lib.mkEnableOption "Install Ruby tooling globally";
+    devShells.ruby = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.mkShell {
+        inherit packages;
+        name = "ruby-dev-shell";
+        shellHook = ''
+          echo "💎 Ruby dev environment"
+        '';
+      };
+      description = "Ruby development shell with interpreter and Solargraph LSP";
+    };
+  };
+  config = lib.mkMerge [
+    (lib.mkIf config.my.dev.ruby.enable {
+      users.users.jawz = { inherit packages; };
+    })
+    {
+      environment.variables = {
+        GEM_HOME = "\${XDG_DATA_HOME}/ruby/gems";
+        GEM_PATH = "\${XDG_DATA_HOME}/ruby/gems";
+        GEM_SPEC_CACHE = "\${XDG_DATA_HOME}/ruby/specs";
+      };
+    }
+  ];
+}

modules/dev/rust.nix

@@ -29,7 +29,12 @@ in
       description = "Rust development shell with cargo and rust-analyzer";
     };
   };
-  config = lib.mkIf config.my.dev.rust.enable {
-    users.users.jawz = { inherit packages; };
-  };
+  config = lib.mkMerge [
+    (lib.mkIf config.my.dev.rust.enable {
+      users.users.jawz = { inherit packages; };
+    })
+    {
+      environment.variables.CARGO_HOME = "\${XDG_DATA_HOME}/cargo";
+    }
+  ];
 }

modules/dev/zig.nix

@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  packages = builtins.attrValues {
+    inherit (pkgs)
+      zig # Zig compiler and stdlib
+      zls # Language server for Zig
+      ;
+  };
+in
+{
+  options = {
+    my.dev.zig.enable = lib.mkEnableOption "Install Zig tooling globally";
+    devShells.zig = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.mkShell {
+        inherit packages;
+        name = "zig-dev-shell";
+        shellHook = ''
+          echo "🦎 Zig dev environment"
+        '';
+      };
+      description = "Zig development shell with compiler and LSP";
+    };
+  };
+  config = lib.mkIf config.my.dev.zig.enable {
+    users.users.jawz = { inherit packages; };
+  };
+}

modules/services/nvidia.nix

@@ -7,6 +7,7 @@
 {
   options.my.services.nvidia.enable = lib.mkEnableOption "enable";
   config = lib.mkIf config.my.services.nvidia.enable {
+    environment.variables.CUDA_CACHE_PATH = "\${XDG_CACHE_HOME}/nv";
     boot.kernelParams = lib.mkIf (config.networking.hostName == "workstation") [ "nvidia-drm.fbdev=1" ];
     services.xserver.videoDrivers = [ "nvidia" ];
     hardware = {