From c64d3d1194b967c76a79059e7e4f751ddb4c19db Mon Sep 17 00:00:00 2001
From: Robin Appelman <robin@icewind.nl>
Date: Wed, 8 Jul 2026 20:08:30 +0200
Subject: [PATCH] hl2sdk updatescript

---
 flake.nix                 |  6 +++++-
 nix/sourcemod/hl2sdk.nix  | 14 +++++++++++++-
 nix/sourcemod/overlay.nix |  2 +-
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/flake.nix b/flake.nix
index 1196503..13f1e3f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -43,7 +43,7 @@
         metamods = pkgs.lib.mapAttrs (name: sdk: pkgs.metamod-source.override {sdks = {${name} = sdk;};}) pkgs.hl2sdk;
       };
 
-      packages = inheritPkgs ["ambuild" "sourcepawn" "sourcemod-includes" "sourcemod-include-library" "srcds-tf2"];
+      packages = inheritPkgs ["ambuild" "hl2sdk" "sourcepawn" "sourcemod-includes" "sourcemod-include-library" "srcds-tf2"];
 
       checks = {
         buildTestScript = {pkgs, ...}:
@@ -55,5 +55,9 @@
             };
           };
       };
+
+      devShells.default = {pkgs, ...}: {
+        packages = with pkgs; [nix-update];
+      };
     };
 }
diff --git a/nix/sourcemod/hl2sdk.nix b/nix/sourcemod/hl2sdk.nix
index e8c083c..f8beb27 100644
--- a/nix/sourcemod/hl2sdk.nix
+++ b/nix/sourcemod/hl2sdk.nix
@@ -1,6 +1,7 @@
 {
   fetchFromGitHub,
   mkDerivation,
+  nix-update-script,
   lib,
 }: let
   inherit (builtins) mapAttrs elem;
@@ -23,13 +24,24 @@
     };
   buildSdk = sdkName: sdk:
     mkDerivation {
-      name = "hl2sdk-${sdkName}";
+      pname = "hl2sdk-${sdkName}";
+      version = "unstable-${sdk.rev}";
       src = fetchRev sdk;
       installPhase = ''
         mkdir -p $out
         cp -r $src $out/hl2sdk-${sdk.dirName or sdkName}
       '';
 
+      passthru = {
+        updateScript = nix-update-script {
+          extraArgs = [
+            "--flake"
+            "--version=branch=${sdkName}"
+            "--override-filename=nix/sourcemod/hl2sdks.json"
+          ];
+        };
+      };
+
       meta = {
         platforms =
           optionals (isX86 sdkName) ["i686-linux"]
diff --git a/nix/sourcemod/overlay.nix b/nix/sourcemod/overlay.nix
index f7bd0a0..83abc0d 100644
--- a/nix/sourcemod/overlay.nix
+++ b/nix/sourcemod/overlay.nix
@@ -1,6 +1,6 @@
 final: prev: {
   hl2sdk = (import ./hl2sdk.nix) {
-    inherit (final) fetchFromGitHub lib;
+    inherit (final) fetchFromGitHub lib nix-update-script;
     inherit (final.stdenvNoCC) mkDerivation;
   };
   ambuild = final.python3Packages.callPackage ./ambuild.nix {};