So I took time to hack zc.recipe.egg and find how it creates
custom scripts. Et voilà...
I found a way to create my custom wsgi script just using the great
I already use for other purposes in various projects.
z3c.recipe.runscript is a great piece of software that helps
creating your own custom small recipes when you don't find what you need
in Pypi or have time to create a real zc.buildout recipe. Here are the
snips you need to do the same in your project :
A snip of buildout.cfg
The three parameters expected from this custom part are :
The egg name that contains the wsgi app code.
The full path to the wsgi script that will be generated, the same path
should sit to the right of
the WSGIScriptAlias in
your Apache config.
The Python name of the application object in the above mentioned egg.
And the snip of above referenced buildouthelpers.py:
Some assumptions without which none of this works:
Your wsgi app sits in the egg.with.wsgiapp egg.
This egg.with.wsgiapp egg is installed in another buildout part
using zc.recipe.egg recipe (or another one that relies on it),
and this part is executed before [wsgiscript].
All requirements for egg.with.wsgiapp must sit in its setup()
parameter install_requires and not in a pip requirements file.
Hope this will help others who fell in a similar situation. Any question
or improvement suggestion is welcome.