Formats cmake file only if a project-wide configuration file is found

Otherwise do nothing.

.emacs

@@ -473,8 +473,14 @@
 	(defun atu/cmake-format-buffer ()
 		"Formats the current buffer using cmake-format"
 		(interactive)
-		(let ((error-buffer (atu/create-or-erase-buffer "*cmake-format:stderr*")))
+		(let (
+			     (error-buffer (atu/create-or-erase-buffer "*cmake-format:stderr*"))
+			     (cmake-format-config-file-exists
+				     (file-exists-p (projectile-expand-root ".cmake-format.yaml"))
+				     )
+			     )
 			(setq-local atu/after-save-message nil)
+			(if cmake-format-config-file-exists
 				(if (eq 0 (call-process-region
 					          ;;region
 					          (point-min)
@@ -501,6 +507,8 @@
 						(buffer-name) error-buffer)
 					(current-message)
 					)
+				(message "cmake-format: skipping as no configuration file found")
+				)
 			)
 		)