Philipp von Weitershausen wrote:
Rocky Burt wrote:
On Thu, 2007-25-01 at 05:07 -0800, Martin Aspeli wrote:
I do wonder what would happen if you had both lib/python/Products/CMFCore and Products/CMFCore, though. Would there be an explicit preference or would Zope fail to start up with a conflict? I think I'd prefer the latter, in fact, so that people don't end up modifying/upgrading the wrong code by accident!
Well, we could probably add conflict-detection to the entry point handlers for Zope (ie so any two packages that try to register as the same project would cause an error). But regarding Products/CMFCore and lib/python/Products/CMFCore conflicting... that would be up to the standard pythonpath mechanism of the python interpreter (whichever is first on the path wins).
Zope 2 itself manipulates Products.__path__ to add INSTANCE/Products (or any other directory specified in zope.conf) as a directory which can contain further products (the original Products package lives at ZOPE/lib/python/Products). pkg_resources uses the same mechanism for namespace packages (that's what the pkg_resources.declare_namespace('Products') call is all about); it appends to __path__.
Therefore, Zope will treat /path/to/the/CMFCore-egg/Products as another directory that contains a product (in this case just one, CMFCore). Thus the standard product override rules apply when the same product is installed in multiple directories.
I updated the proposal text with this information.
I imagine it would be pretty trivial to write something that would generate a setup.py from an svn:externals property so you could create a "Products" distribution in one fell swoop, especially since the entry point section of the setup.py can handle config parser output. -w -- ------ d. whit morriss ------ - senior engineer, opencore - - http://www.openplans.org - - m: 415-710-8975 - "If you don't know where you are, you don't know anything at all" Dr. Edgar Spencer, Ph.D., 1995