Re: NSLS-II Debian Repository in 2018

[Michael Davidsaver <mdavidsaver@gmail.com>]

On 04/26/2018 11:50 AM, Anton Derbenev wrote:
> 1. Actually, in our old repository setup, there are package versions like "8.16+zjessie+nmu1". You can see the combination of "forking" and NMU concepts here, and upgrades are handled in an interesting manner. While comparison-wise squeeze < wheezy, wheezy > jessie - so "z" is added to make wheezy < zjessie. It would continue for stretch, e.g. zjessie < zstretch... As suggested in the document you mentioned, handling "forking" with the debXuY format would introduce a reusable ordering and that I picked up to replace "zjessie".

"-zjessie" was me having not having paid enough attention to realize that there were
better solutions.  eg. "+bpoX.Y" for backports.

When thinking about numbers, I found it useful to make a diagram of repositories,
and supported upgrade paths.  The look to see that version numbers of rebuilds for newer repos
would need to compare to ensure that "newer" repos, have "newer" versions.

By "newer" I mean, A newer than B when "dpkg --compare-versions A '>' B" is true.