add rust

flake.nix

@@ -187,6 +187,22 @@
                 echo "Bun/Node web shell ready"
               '';
             };
+
+            rust = pkgs.mkShell {
+              name = "rust";
+              packages = with pkgs; [
+                cargo
+                rustc
+                rust-analyzer
+                rustfmt
+                clippy
+              ];
+              shellHook = ''
+                mkdir -p "$PWD/.cache/cargo"
+                export CARGO_HOME="$PWD/.cache/cargo"
+                echo "Rust toolchain shell ready"
+              '';
+            };
           };
         in baseShells // zigShell);
 

modules/home/rsydn/devtools/languages.nix

@@ -47,6 +47,7 @@ let
     pkgs.nodejs_20
   else
     getPkg "nodejs";
+  cargoPackage = getPkg "cargo";
 
   toolSpecs = [
     {
@@ -64,6 +65,11 @@ let
       cfg = cfg.node;
       defaultPackage = nodePackage;
     }
+    {
+      name = "cargo";
+      cfg = cfg.cargo;
+      defaultPackage = cargoPackage;
+    }
   ];
 
   languagePackages = mkToolPackages toolSpecs;
@@ -90,6 +96,12 @@ in {
       description = "Node.js runtime for CLI tooling.";
     };
 
+    cargo = mkToolOption {
+      name = "Cargo";
+      defaultPackage = cargoPackage;
+      description = "Rust package manager and toolchain.";
+    };
+
     extraPackages = mkOption {
       type = types.listOf types.package;
       default = [ ];