Hey, this was just pointed out to me, and it seems to perfectly provide a
solution to a problem.
As many might be aware, the Fedora packaging committee has periodically taken
up the issue of using tilde Version:. And I've been putting in a load of
effort trying to come up with a consistent scheme which actually covers the
range of cases that our current scheme does.
One thing I've run into is that tilde is one of a pair of operators you
actually need to implement a scheme which consistently places information about
snapshots into the Version: field. If you use tilde, you can (and in some
cases must) move prerelease information on snapshots into Version:, but
information on post-release snapshots has to stay in Release: because you
cannot know what upstream will call the next version.
So you can't do `3.2 < 3.2(snapshot) < 3.2.1` because there's nothing you can
fill in for `(snapshot)`. In my exposition for this I had mentioned a mythical
operator '?' or '+' or something which did this. Turns out this PR provides
exactly that, calling it '^'.
I first mentioned this in the context of the work I'm doing in
https://pagure.io/packaging-committee/issue/398#comment-540026 and also in my
notes for the use of tilde in
https://fedoraproject.org/wiki/User:Tibbs/TildeVersioning#Conceptual_issues_with_tilde
@pmatilai also indirectly mentions this in
https://pagure.io/packaging-committee/issue/398#comment-540133 and mentions
that it can be hacked around by adding random zeroes. Though in reality, you
would have to add multiple zeroes to truly avoid conflicts.
So, while lack of this isn't going to stop the current effort to implement
tilde, it would certainly simplify things if we had it.
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