At 06:24 PM 12/7/2006 +0200, Ilias Lazaridis wrote:
>Looks somehow like this:
>
>
>from distutils.core import run_setup
>dist = run_setup( setuppys[0],None,'init')
>print dist
>
>loaded_components = []
>module = []
>
>import pkg_resources
>for name in pkg_resources.get_entry_map(dist,'trac.plugins'):
> entry_point =
>pkg_resources.get_entry_info(dist,trac.plugins', name)
> entry_point.load()
>
>but this fails, I must have missed some point.
>
>(('Expected string, Requirement, or Distribution', ))
>
>although "dist" is an:
>
><setuptools.dist.Distribution instance at 0x0187E260>
That Distribution is a distutils distribution, not a pkg_resources
distribution.
>How can I create an egg representing object (from the sources/setup.py),
>from which I can load the entry-points afterwards, without having to
>generate an egg_info on the file-system?
You can take the dist.Distribution object's entry_points and parse it to
create an entry point map.
See
http://peak.telecommunity.com/DevCenter/PkgResources#creating-and-parsing
for details. In particular, you want to use:
ep_map = EntryPoint.parse_map(dist.entry_points)
entry_point = ep_map['trac.plugins'][name]
There are several big drawbacks to this approach, because you're basically
bypassing the entire eggs system. Here are two of the things that will
break when you do this:
* Plugins will not be able to depend on other plugins
* Plugins will not be able to depend on other Python packages or projects
I can't guarantee that there aren't other things that will break, too. I
don't recommend that you use this approach in a published or production
system, just because you don't like generating the egg-info on disk. It's
there for several reasons, not the least of which is that it allows you to
ship plugins as single .egg files. See also:
http://peak.telecommunity.com/DevCenter/PkgResources#locating-plugins
which shows how to do automatic plugin discovery and dependency
resolution. This is another example of something that won't work with the
approach you're trying to use.
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