From fbde24ee1795df4fac9206a0792da6b061b2051c Mon Sep 17 00:00:00 2001
From: Rangi <35663410+Rangi42@users.noreply.github.com>
Date: Tue, 4 Feb 2025 10:40:38 +0100
Subject: [PATCH] Add contrib/checkformat.bash to check for clang-formatting
 (#1646)

---
 .github/workflows/checkdiff.yml   |  2 +-
 .github/workflows/checkformat.yml | 12 ++++++++++++
 contrib/checkformat.bash          | 15 +++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/checkformat.yml
 create mode 100755 contrib/checkformat.bash

diff --git a/.github/workflows/checkdiff.yml b/.github/workflows/checkdiff.yml
index feb45061..c2504f2a 100644
--- a/.github/workflows/checkdiff.yml
+++ b/.github/workflows/checkdiff.yml
@@ -11,7 +11,7 @@ jobs:
           cd rgbds
           git remote add upstream "${{ github.event.pull_request.base.repo.clone_url }}"
           git fetch upstream
-      - name: Checkdiff
+      - name: Check diff
         working-directory: rgbds
         run: |
           make checkdiff "BASE_REF=${{ github.event.pull_request.base.sha }}" Q= | tee log
diff --git a/.github/workflows/checkformat.yml b/.github/workflows/checkformat.yml
new file mode 100644
index 00000000..857a3256
--- /dev/null
+++ b/.github/workflows/checkformat.yml
@@ -0,0 +1,12 @@
+name: Code format checking
+on: pull_request
+
+jobs:
+  checkformat:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Check format
+        run: |
+          ./contrib/checkformat.bash
diff --git a/contrib/checkformat.bash b/contrib/checkformat.bash
new file mode 100755
index 00000000..f2f357ca
--- /dev/null
+++ b/contrib/checkformat.bash
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+# SPDX-License-Identifier: MIT
+
+clang-format --version
+
+find . -type f \( -iname '*.hpp' -o -iname '*.cpp' \) -exec clang-format -i {} +
+
+if ! git diff-index --quiet HEAD --; then
+	echo 'Unformatted files:'
+	git diff-index --name-only HEAD --
+	echo
+	git diff HEAD --
+	return 1
+fi