Automated Code Signing in BitBucket - Any Plug Ins Available?

[Recent Coin]

It would be nice to be able to have a code commit create a digital signature of that code.  I've been looking for a plug in or some native facility in BitBucket but I'm not finding anything.  I know that other code repositories have this and it seems to be largely centered around deploying to the app stores.  

In our case, we may have a regulatory requirement to sign all of our code going forward so I wanted to see if anyone knows of any plug ins that would let us integrate with our HSMs to sign the code.