I just tried to send a Maven-based project to another computer and HORROR, red markers everywhere!!
However, mvn clean install is building just fine.
What I had to do was to install lombok in the eclipse installation directory.
Download the lombok.jar from here and then install it using the following command:
java -jar lombok.jar
After that make sure that the lombok.jar is added in your build path. But make sure you don't add it twice by adding once through maven or gradle and once again in eclipse path.
After that clean and build the project again and see all the errors go away.