On Thu, Mar 11, 2010 at 12:03 PM, Gael Pasgrimaud <[email protected]> wrote:
> On Thu, Mar 11, 2010 at 8:41 PM, Mike Orr <[email protected]> wrote:
>> On Thu, Mar 11, 2010 at 10:59 AM, Gael Pasgrimaud <[email protected]> wrote:
>>> Hi,
>>>
>>> On Thu, Mar 11, 2010 at 7:35 PM, gazza <[email protected]> wrote:
>>>> Hiya,
>>>>
>>>> I am installing on the production server and hit the below:
>>>>
>>>> "Installed distribution Webhelpers 1.0b4 conflicts with requirement
>>>> WebHelpers>=0.6.1,<0.6.99"
>>>>
>>>> I guess others have seen this problem. What was the workaround?
>>>>
>>>
>>> Try to remove the conflicted version from your file sytem and install
>>> the correct one with easy_install
>>>
>>> Btw I think that fixing eggs versions in setup.py is a bad idea.
>>> Pylons should have a pip's requirement file or something like that (I
>>> also know Zope's Known Good Set aka KGS) for each releases to get the
>>> correct dependencies versions.
>>> Then if you have a fix in a dependency you can change the required
>>> version without releasing a new Pylons versions
>>
>> The problem is Paste uses entry points and 'pkg_resources.require',
>> which blows up if any requirements are in conflict.
>>
>
> That's why a requirement file can fix the problem if you only have
> Dep==X.X in this file.
> This assume that you can have a *stable* Pylons X.X environment even
> if a broken dependency is released on pypi.

How does a requirements file override the version-comparing
'pkg_resources.require' does? It seems like requirements control only
what gets installed, not runtime import conflicts. Does installing
requirements actually change the egg-info metadata to allow those
versions to be imported without errors?

-- 
Mike Orr <[email protected]>

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