Re: Secret changes for binNMUs

["Nathanael Nerode" <neroden@not.real.address.com>]

Blaaaargh!

OK.  So I was working on the problem of fixing dpkg-dev so that

foo Depends: foo-data {SourceVersion}, foo-libs {BinaryVersion}

or something similar actually works.  By parsing the version numbers.

Now it's apparently been changed under our noses, in such a way that my 
proposed
scheme won't work -- and furthermore anyone who implemented their own 
version
of such code, in their own package, will find it magically broken.

Thanks to Goswin and Henrique for *notifying* people of this, since
apparently whoever changed it didn't think about the impacts on other 
developers.

>  Instead binNMU versions are now made by adding +b1 (+b2, +b3) to the
>  version and containing a "Source: foo (non-NMU version)" line. The
>  later makes it possible to reliable associate binNMUs with their
>  source.

So how do we write a package Depends: line now?  Apparently the buildd uses 
the original source,
and adds a changelog entry -- *but what happens to the {SourceVersion} 
substitution?*  Does the buildd
alter the substvars file before compiling?  Does the {SourceVersion} 
substitution end up being the original 1.2-3 source version, or the 1.2-3+b4 
version?  Whichever it ends up being, *how do we get the other one* if we 
need it?