CI/Circle CI: Enforce codestyle checks

(cherry picked from commit 32c9f1c7a228db33110ab0ab5975ba37cba85106)

.circleci/config.yml

@@ -13,6 +13,11 @@ jobs:
           name: Checkout
           command: |
             /scripts/checkout.sh
+      - run:
+          name: Codestyle checks
+          command: |
+            chmod +x contrib/check_codestyle.sh
+            ./contrib/check_codestyle.sh
       - run:
           name: Setup
           command: |

contrib/check_codestyle.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+set -e
+
+echo "Codestyle check script:"
+echo
+
+regexChecks=()
+
+for check in ${regexChecks[@]}; do
+    echo "  Checking RegEx: '${check}'"
+    
+    if grep -E -r ${check} src; then
+        exit 1
+    fi
+done
+
+echo "Everything looks good"