From 7ed4621ae0c874f7f1e50a0a8f655cdbe5a8f019 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 27 Jul 2026 23:49:03 +0530
Subject: [PATCH] Dont emit empty specialisation commands

---
 kitty/shaders/slang.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kitty/shaders/slang.py b/kitty/shaders/slang.py
index 49ad0aadc..47f58fb54 100644
--- a/kitty/shaders/slang.py
+++ b/kitty/shaders/slang.py
@@ -788,6 +788,8 @@ def create_specialisations(sources: dict[str, SlangFile], build_dir: str) -> Ite
     for _, base_build, _, _, sfile in iter_entry_point_shaders(sources, build_dir, build_dir):
         if sfile.entry_points and sfile.specializations:
             for sp in sfile.specializations:
+                if not sp.variables:
+                    continue
                 dest = f'{base_build}{sp.filename_insert}.slang'
                 payload = existing = ''
                 if sp.variables:
@@ -846,6 +848,7 @@ def main() -> None:
     emphasis = setup['emphasis']
 
     def prun(cmds: Iterable[tuple[bool, str, list[str]]]) -> None:
+        cmds = tuple(cmds)
         needed = []
         for needs_build, desc, cmd in cmds:
             if needs_build: