[Python-Dev] PEP 376 proposed changes for basic plugins support

[Éric Araujo]

Hello

Le 03/08/2010 13:09, Michael Foord a écrit :
> On 03/08/2010 09:28, M.-A. Lemburg wrote:
>> P.J. Eby wrote:
>>> At 10:37 PM 8/2/2010 +0200, M.-A. Lemburg wrote:
>>>>> [idea about sqlite3 db for caching]
>>>> [distros won’t like it, the filesystem is the db]
>>> [the db is a cache, it does not replace the files]
>> [advantages of sqlite3 db]
> Sounds good as an "optional extra" (i.e. it should be safe to completely 
> delete the cache file and still have everything work) to me. If the API 
> for using the feature is worked out well first this could be done as a 
> behind the scenes optimisation...

FYI, the current implementation in the distutils2-augmented pkgutil uses
a cache (a function call memo) for functions that e.g. iterate over
dist-info directories (and optionally egg-info directories too) or get a
Distribution object representing an installed project. Tools that modify
the state of the installation can call a function to clear this cache.

A sqlite db would certainly speed things up; it could replace the
existing caching in distutils2 or be left to other tools.

Regards