add format step in gitlab-ci

.gitignore

@@ -31,6 +31,9 @@ workspace.tar.gz
 # build dir
 build
 
+# gitlab-ci / clang-format
+patches
+
 # Ansys
 *.apdl
 !*_lfs.apdl

.gitlab-ci.yml

@@ -13,9 +13,23 @@ default:
 #        - warson   # you can choose a set of runners here
 
 stages:
+    - format
     - build
     - test
 
+format:
+    <<: *global_tag_def
+    stage: format
+    script:
+        - ./scripts/format_code.py
+        - mkdir -p patches
+        - if git diff --patch --exit-code > patches/clang-format.patch; then echo "Clang format changed nothing"; else echo "Clang format found changes to make!"; false; fi
+    artifacts:
+        paths:
+            - patches/
+        expire_in: 1 day
+        
+
 build-no-tlnos:
     <<: *global_tag_def
     stage: build