id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
717	unnecessary rebuild of dependencies when tahoe-deps/ is present	warner	somebody	"Using a trunk [changeset:9a02f4a1043d6288] tree, on my debian/sid box, performing ""python setup.py build"" with the tahoe-deps tarball unpacked in the parent directory causes several dependency libraries to be built and installed in support/lib/python2.5/site-packages even though those libraries are already present, usable, and visible to {{{pkg_resources.requires}}} in the standard PYTHONPATH /usr/lib/python2.5/site-packages directory.

The libraries that are unnecessarily rebuilt are:

 * foolscap-0.4.1
 * twisted-8.2.0
 * simplejson-2.0.9

Removing ../tahoe-deps, erasing support/lib, and re-running ""python setup.py build"" correctly skips the build of these libraries, resulting in a support/lib that only contains setuptools-0.6c12dev and the allmydata-tahoe.egg-link file (well, and the usual setuptools noise: setup.py, setuptools.pth, and easy-install.pth).

Something in setuptools is buggy: having ../tahoe-deps available should not influence the decision to install a library or not.

This needs to be added to the setuptools bugtracker at http://bugs.python.org/setuptools/ .

"	defect	new	major	undecided	packaging	1.4.1