I don't understand why Maven synchronization doesn't exclude some directories :
- when a project is synchronized from pom.xml, output directory is not exluded.
- same thing for nested modules : if moduleA1 is under moduleA, moduleA will contain moduleA1 whereas moduleA1 is also synchonized as another module.
In both case, files are duplicated, which is not convenient. You can mark directories as excluded using projects settings, but these settings will be reset after next Maven synchronization.
How do you handle that ? Why these directories couln't be marked as excluded by default ?