From 96a9fce149629cbb7effd7162fba0af3698c90bf Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 5 Aug 2026 19:53:04 +0530
Subject: [PATCH] Enforce formatting of C code in CI

---
 .github/workflows/ci.py  | 3 +++
 .github/workflows/ci.yml | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/.github/workflows/ci.py b/.github/workflows/ci.py
index b83f429b1..5e1f15273 100644
--- a/.github/workflows/ci.py
+++ b/.github/workflows/ci.py
@@ -350,6 +350,9 @@ def main() -> None:
                 raise SystemExit(q)
         if subprocess.run(['ruff', 'format', '--check']).returncode != 0:
             raise SystemExit('Some Python files are not formatted correctly')
+        c_files = subprocess.check_output(['git', 'ls-files', '*.c', '*.h', '*.m']).decode().split()
+        if c_files and subprocess.run(['clang-format', '--dry-run', '--Werror'] + c_files).returncode != 0:
+            raise SystemExit('Some C/ObjC files are not formatted correctly')
     elif action == 'check-dependencies':
         check_dependencies()
     else:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c6fe578f2..6de663978 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -111,6 +111,9 @@ jobs:
           - name: Run ruff
             run: ruff check .
 
+          - name: Install clang-format
+            run: sudo apt-get install -y clang-format
+
           - name: Check code formatting
             run: go version && python .github/workflows/ci.py check_code_formatting