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Excerpts from Michael Still's message of 2017-09-20 10:25:17 -0600:
> Dims, I'm not sure that's actually possible though. Many of these files
> have been through rewrites and developed over a large number of years.
> Listing all authors isn't practical.
> 
> Given the horse has bolted on forking these files, I feel like a comment
> acknowledging the original source file is probably sufficient.
> 
> What is concerning to me is that some of these files are part of the "ABI"
> of nova, and if mogan diverges from that then I think we're going to see
> user complaints in the future. Specifically configdrive, and metadata seem
> like examples of this. I don't want to see us end up in another "managed
> cut and paste" like early oslo where nova continues to develop these and
> mogan doesn't notice the changes.
> 
> I'm not sure how we resolve that. One option would be to refactor these
> files into a shared library.
> 

Agreed 100%. It would be better to have something completely different
than something that works 97% the same but constantly skews.

Luckily, since these things are part of the ABI of Nova, they are
versioned in many cases, and in all have a well defined interfaces on
one side. Seems like it should be relatively straight forward to wrap
the other side of them and call it a library.