Puppet users - Oct 2014 - Writing modules to gracefully skip OS's they don't support

Is it possible to make a module simply not be applied at all if it 
encounters an OS it does not support?

Currently doing a check for the OS and outputting a "fail" is standard
amongst modules but this ends the Puppet run for the client if it has a 
module assigned that does this.

The use case is such that assigning a module that fails unless it finds a 
certain OS version to all nodes in Hiera like we do in my workplace via 
'common.yaml' would cause all servers that do not match a required OS to
fail it's Puppet runs from then on.

The only way I can think is to wrap most/all of the module's resources in 
if statements making the same OS checks again & again, which seems 
wasteful. Does anyone have an idea on how to do this better or is it 
something we should just ignore?

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