Add Pre-commit config and add to CI pipeline

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Arm Limited.
+# Copyright (c) 2019, 2022 Arm Limited.
 #
 # SPDX-License-Identifier: MIT
 #
@@ -20,11 +20,19 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-default:
-  image: "registry.fedoraproject.org/fedora"
+pre-commit:
+  image: python:3.10.6
+  rules:
+    - if: $CI_MERGE_REQUEST_DIFF_BASE_SHA
+  script:
+    - pip install pre-commit
+    - echo Using $CI_MERGE_REQUEST_DIFF_BASE_SHA as Pre-commit base
+    - pre-commit run --show-diff-on-failure --from-ref $CI_MERGE_REQUEST_DIFF_BASE_SHA --to-ref HEAD
 
-# For now start from a standard Fedora image and install everything each time.
-before_script:
+build_vulkan_wsi_layer:
+  # For now start from a standard Fedora image and install everything each time.
+  image: "registry.fedoraproject.org/fedora"
+  before_script:
     - pwd
     - uname -a
     # Install necessary packages.
@@ -43,8 +51,6 @@ before_script:
     - make
     - make install
     - popd
-
-build_vulkan_wsi_layer:
   script:
     - pwd
     - mkdir build

.pre-commit-config.yaml

@@ -0,0 +1,10 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+
+minimum_pre_commit_version: 2.9.0
+
+repos:
+    - repo: https://github.com/pre-commit/mirrors-clang-format
+      rev: v10.0.1
+      hooks:
+          - id: clang-format