From 51f7f4079b8bb4b7a105714f9d40414fe39a26f6 Mon Sep 17 00:00:00 2001
From: imxyy_soope_ <imxyy1soope1@gmail.com>
Date: Sat, 24 Jan 2026 22:17:23 +0800
Subject: [PATCH] feat: builtins.parseDrvName

---
 nix-js/runtime-ts/src/builtins/misc.ts | 17 +++++++++++++++--
 nix-js/tests/builtins.rs               |  7 +++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/nix-js/runtime-ts/src/builtins/misc.ts b/nix-js/runtime-ts/src/builtins/misc.ts
index d4f7f09..e895e2b 100644
--- a/nix-js/runtime-ts/src/builtins/misc.ts
+++ b/nix-js/runtime-ts/src/builtins/misc.ts
@@ -228,8 +228,21 @@ export const outputOf =
     throw new Error("Not implemented: outputOf");
   };
 
-export const parseDrvName = (s: NixValue): never => {
-  throw new Error("Not implemented: parseDrvName");
+export const parseDrvName = (s: NixValue): NixAttrs => {
+  const fullName = forceStringNoCtx(s);
+  let name = fullName;
+  let version = "";
+  for (let i = 0; i < fullName.length; ++i) {
+    if (fullName[i] === '-' && i + 1 < fullName.length && !/[a-zA-Z]/.test(fullName[i + 1])) {
+      name = fullName.substring(0, i);
+      version = fullName.substring(i + 1);
+      break;
+    }
+  }
+  return {
+    name,
+    version
+  }
 };
 
 export const parseFlakeName = (s: NixValue): never => {
diff --git a/nix-js/tests/builtins.rs b/nix-js/tests/builtins.rs
index 6016762..ba0b11f 100644
--- a/nix-js/tests/builtins.rs
+++ b/nix-js/tests/builtins.rs
@@ -315,3 +315,10 @@ fn builtins_function_args() {
         ])))
     );
 }
+
+#[test]
+fn builtins_parse_drv_name() {
+    let result = eval(r#"builtins.parseDrvName "nix-js-0.1.0pre""#).unwrap_attr_set();
+    assert_eq!(result.get("name"), Some(&Value::String("nix-js".into())));
+    assert_eq!(result.get("version"), Some(&Value::String("0.1.0pre".into())));
+}