[Distutils] Requirent specifiers specified? :)

[Jim Fulton]

On Jun 22, 2006, at 12:49 PM, Phillip J. Eby wrote:

> At 12:26 PM 6/22/2006 -0400, Jim Fulton wrote:
>> On Jun 21, 2006, at 5:11 PM, Phillip J. Eby wrote:
>>> """Requirement strings basically consist of a distribution name, an
>>> optional list of "options" (more on this in a moment), and a  
>>> comma- separated list of zero or more version conditions. Version
>>> conditions basically specify ranges of valid versions, using
>>> comparison operators. The version conditions you supply are sorted
>>> into ascending version order, and then scanned left to right until
>>> the package's version falls between a pair of > or >= and < or <=
>>> conditions, or exactly matches a == or != condition."""
>>
>> I don't think this is right. :)
>> ...
>> When scanning left to right, 1.9 matches !=1.1, so it should match  
>> and,
>> since it is the highest version, it should be returned.  Either your
>> description
>> of the algorithm is incorrect or I'm misunderstanding it.
>
> You're missing the "exactly matches" part.  The relevant context  
> is: "Until the package's version ... exactly matches a == or !=  
> condition".  Perhaps making that "a == or != condition's version"  
> would have been clearer, as that's what I meant by that phrase.
>
> Anyway, "1.9" does not exactly match the "1.1" in "!=1.1".

Um, OK.  So I guess the idea is that we scan these things trying to  
make a decision.
The decision is either match or not match.  Is that how I was supposed
to read the above quote?

Jim

--
Jim Fulton			mailto:jim at zope.com		Python Powered!
CTO 				(540) 361-1714			http://www.python.org
Zope Corporation	http://www.zope.com		http://www.zope.org