Test clang-format project wide in same pipeline

.gitlab-ci.yml

@@ -4,6 +4,7 @@ default:
 # Note: We set `needs` on each job to control the job DAG.
 # See https://docs.gitlab.com/ee/ci/yaml/#needs
 stages:
+  - checks
   - build
   - test
 
@@ -118,6 +119,18 @@ Ubuntu_GCC:
     CCACHE_SIZE: 4G
   # When CCache doesn't exist (e.g. first build on a fork), build takes more than 1h, which is the default for forks.
   timeout: 2h
+  
+Clang_Format:
+  extends: .Ubuntu_Image
+  stage: checks
+  cache:
+    key: Ubuntu_Clang_Format.ubuntu_22.04.v1
+    paths:
+      - apt-cache/
+  before_script:
+    - CI/install_debian_deps.sh openmw-clang-format
+  script:
+    - CI/check_clang_format.sh
 
 Ubuntu_GCC_Debug:
   extends: .Ubuntu

CI/check_clang_format.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+CLANG_FORMAT="clang-format-14"
+HAS_DIFFS=0
+
+check_format() {
+    local path=$1
+    local tempfile=$(mktemp)
+    for item in $(find $path -type f -name "*");
+    do
+        if [[ "$item" =~ .*\.(cpp|hpp|h) ]]; then
+            echo "Checking code formatting on $item"
+            $CLANG_FORMAT $item > $tempfile
+            git diff --color=always --no-index $item $tempfile
+            if [[ $? = 1 ]]; then
+                HAS_DIFFS=1
+            fi
+        fi;
+    done;
+    rm -f $tempfile
+}
+
+check_format "./apps"
+check_format "./components"
+
+if [[ $HAS_DIFFS -eq 1 ]]; then
+    echo "clang-format differences detected" 
+    exit 1
+fi;
+
+exit 0

CI/install_debian_deps.sh

@@ -77,6 +77,11 @@ declare -rA GROUPED_DEPS=(
   "
 
   [android]="binutils build-essential cmake ccache curl unzip git pkg-config"
+  
+  [openmw-clang-format]="
+    clang-format-14
+    git-core
+  "
 )
 
 if [[ $# -eq 0 ]]; then