add typescript node

runtimes/default.nix

@@ -18,4 +18,5 @@ args: {
     "zig" = import ./zig.nix args;
     "vlang" = import ./vlang.nix args;
     "swift" = import ./swift.nix args;
+    "node-typescript" = import ./node-typescript.nix args;
 }

runtimes/node-typescript.nix

@@ -0,0 +1,40 @@
+{pkgs, piston, ...}:
+let
+    node = pkgs.nodejs;
+    pkg = pkgs.nodePackages.typescript;
+in piston.mkRuntime {
+    language = "typescript";
+    version = pkg.version;
+    runtime = "node";
+
+    aliases = [
+        "ts"
+        "node-ts"
+        "tsc"
+    ];
+
+    compile = ''
+        rename 's/$/.ts/' "$@" # Add .ts extension
+        ${pkg}/bin/tsc *.ts
+    '';
+
+    run = ''
+        code="$1.js"
+        shift
+        ${node}/bin/node "$code" "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.js" = ''
+                    console.log("OK");
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.js";
+        })
+    ];
+}