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Re: upset, genini: different version ordering
- From: Jon Turney <jon dot turney at dronecode dot org dot uk>
- To: cygwin-apps at cygwin dot com
- Date: Fri, 9 Oct 2015 14:24:22 +0100
- Subject: Re: upset, genini: different version ordering
- Authentication-results: sourceware.org; auth=none
- References: <87380i671e dot fsf at Rainer dot invalid> <55AD399D dot 7020001 at dronecode dot org dot uk>
On 20/07/2015 19:10, Jon TURNEY wrote:
On 20/07/2015 19:03, Achim Gratz wrote:
I've just found that upset and genini will order versions differently.
For perl-Carp, genini produces:
Something which seems to be missing from this discussion is how Cygwin
version numbers are supposed to be sorted.
If I recall correctly, genini is just broken, doing some kind of lexical
sort which e.g. sorts 1.10 before 1.9.
This needs to be simple, documented (and ideally, similar to other
package managers), so that package maintainers can easily anticipate how
their package versions are going to be ordered, but  seems silent on
this subject, apart from describing it as 'intuitive'
Here's a list of existing package versions ordered by upset, which I
think sort differently in setup:
makeself 2.1.5+20120813+gitdcbe778-1 < 2.1.5-3
tcl-itcl 3.4b1-1 < 3.4.1-1
tidy 20090325-1 < 041206-1
wput 0.6.2+git20130413-2 < 0.6.2-1
bzr 2.6.0+bzr6602-1 < 2.6.0-2 < 2.6b2-1
cgdb 0.6.7+20150214+git3a710f9-1 < 0.6.7-1
The result for tidy is particularly unexpected, and looking at the date
of the package files, just wrong. (This appears to be due to upset
truncating numeric parts to 4 digits!)
I don't really want to spend effort on unravelling the complexities of
the sorting that upset does, since I don't think it's worth keeping, and
we should switch to a scheme which can be described in a paragraph,
e.g. the scheme used by setup and RPM:
Compare contiguous chunks of digits or non-digits.
Non-digit chunks sort before digit chunks.
Digit chunks sort numerically, non-digit chunks sort lexicographically.
The version with a suffix remaining is the greater