Parse out pure version number

I have a command that I'm currently running via the exec plugin where I need
to pass in the version number. This works fine if my version number is
something like "1.0.0" but if I'm working from a snapshot, I need it to only
return the actual version (1.0.0) instead of "1.0.0-SNAPSHOT". Is there a
special property to get the resolved version, or do I need to manually add
something to my exec script to parse out -SNAPSHOT?

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Thanks,
Josh McFarlane