ci: compare warnings with main branch

.github/workflows/zxc-code-style.yaml

@@ -80,4 +80,31 @@ jobs:
             npm ci
 
       - name: Check Code Style
-        run: task check
+        run: |
+          task check
+          mv eslint.log eslint-branch.log || true
+
+      - name: Compare warnings with main branch
+        run: |
+          git fetch origin main:main
+          git checkout main
+          task check
+          get_warnings() {
+            file="$1"
+            if [ -f "$file" ]; then
+              # Use awk to find the line containing "problems" and print the token before "warnings"
+              awk -F'[(), ]+' '/problems/ { for(i=1;i<=NF;i++) if($i=="warnings") print $(i-1) }' "$file" | tail -n1
+            else
+              echo 0
+            fi
+          }
+          branch_warnings=$(get_warnings eslint-branch.log)
+          main_warnings=$(get_warnings eslint.log)
+          echo "Warnings on branch: $branch_warnings"
+          echo "Warnings on main: $main_warnings"
+            if [ "$branch_warnings" -gt "$main_warnings" ]; then
+              echo "✘ Warnings have increased from $main_warnings to $branch_warnings"
+              exit 1
+            else
+              echo "✔ Warnings have not increased"
+            fi