Release only updated modules

[Mattias Borgkvist]

Hi,
 
We have a large multi module project. In the 
development branch all modules have SNAPSHOT versions. When we release the 
project we would only like to release the modules that is updated (in the SCM 
system). Do we manually need to:
1) Make a diff with the SCM tool
2) 
Revert back the unmodified modules to the previous release version
3) Execute 
Maven release
 
Or is there a better soultion? Maybe multi module 
projects are ment to be released all together?
 
Thanks,
Mattias