[Distutils] Multiple Egg files from one single setup.py

[Tarek Ziadé]

On Fri, Mar 28, 2008 at 12:18 AM, Dennis Kempin <python at dennis-kempin.de>
wrote:

> Hi folks,
>
> i really like the setuptools project, it makes my life much easier, but
> recently i stumbled over the following problem:
>
> My Project constist of 2 main egg distributions and a bunch of "plugin"
> eggs.
>
> The first Problem ist: These projects are in the same source tree. like
> this:
> src/project/master
> src/project/plugins (namespace package)
> src/project/plugins/pa
> src/project/plugins/pb
> src/project/plugins/pc
>
> Well not a problem for setuptools since you can specify which packages to
> include into a distribution.
> But the problem is: when i call setup() multiple times in one setup.pyfile
> everything gets completly messed up. All egg files contain the whole
> project
> source.


What I would do is to create several eggs with these names:

project.master
project.plugin.pa
project.plugin.pb
project.plugin.pc

Then organize the code like this on your box/repo:

src/project/packages
    project.master/
                 setup.py
                 etc...

    project.plugin.pa
               setup.py
               project
                     plugin
                          pa
                             the code
    etc..


This is how Zope 3 is organized for instance: a bunch of eggs, that share
the same namespaces
but that are separated in independant folders, since setuptools allow
several packages
to share the same top namespace.


>
> My second solution was to create multiple setup.py files (setup-master.py,
> setup-pa.py, and so on) and call them via system(). But this resulted in
> some
> conflicts in the build directory.
>
> So well.. is it possible (and especially how is it possible) to create
> multiple egg files within one python instance (one setup.py file that is
> executed)?


I am not sure you can, but if you do as mentioned below, you should be fine.


>
>
> And another question:
> When i have all the plugin egg files packaged. I want to create a new egg
> file
> (project-dist) to distribute the master and all of its plugins (which are
> simply copied to a /etc/ folder).
> Thus a single egg file that installs the master and copies some egg files
> to a
> specified folder.


If your application is based on a collection of eggs, you can add them in
the "install_requires"
meta-data of a "main" egg. This will fetch them and install them as
dependencies.
But each egg has to be available at PyPI

Another solution to wrap an egg-based application is to use a tool like
zc.buildout.

Now this is how I work and do with eggs, and how most people do in Zope
community,
but there might be other ways, I don't know.

Regards,
Tarek


-- 
Tarek Ziadé | Association AfPy | www.afpy.org
Blog FR | http://programmation-python.org
Blog EN | http://tarekziade.wordpress.com/
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