[tahoe-lafs-trac-stream] [tahoe-lafs] #1450: setuptools downloads and builds a correct version of a dependency in the install-to-egg step, but then adds a different version not satisfying the requirement to easy_install.pth

[tahoe-lafs]

#1450: setuptools downloads and builds a correct version of a dependency in the
install-to-egg step, but then adds a different version not satisfying the
requirement to easy_install.pth
------------------------------+---------------------------
 Reporter:  davidsarah        |          Owner:  somebody
     Type:  defect            |         Status:  new
 Priority:  major             |      Milestone:  undecided
Component:  packaging         |        Version:  1.8.2
 Keywords:  setuptools build  |  Launchpad Bug:
------------------------------+---------------------------
 In the attached install-to-egg build on the 'Eugen lenny' buildslave, the
 requirement for Twisted is >= 10.1.0.

 setuptools downloads and builds Twisted 10.2:
 {{{
 Searching for Twisted>=10.1.0
 Best match: Twisted 10.2.0
 Downloading http://tahoe-lafs.org/source/tahoe-lafs/deps/tahoe-dep-
 sdists/Twisted-10.2.0.tar.bz2
 Processing Twisted-10.2.0.tar.bz2
 Running Twisted-10.2.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-
 QTimkw/Twisted-10.2.0/egg-dist-tmp-yBXrHn
 [...]
 }}}

 but then it adds Twisted 8.1 to easy-install.pth, resulting in a failed
 Tahoe build:
 {{{
 Adding Twisted 8.1.0 to easy-install.pth file
 [...]
 Installed /home/tahoebuildslave/tahoebuildslave/Eugen lenny-
 amd64/build/egginstalldir/Twisted-8.1.0-py2.5-linux-x86_64.egg
 error: Could not find required distribution Twisted>=10.1.0
 }}}

 (If Twisted 8.1 were installed single-version-externally-managed, it would
 be correct to fail the build, but the attempt to build 10.2 would be wrong
 and the error message misleading.)

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1450>
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