New submission from Zooko O'Whielacronx <zooko@zooko.com>: If you try to install this minimal project: """ import setuptools setuptools.setup(name="minproj_that_needs_nevow", install_requires=["Nevow"] """ You'll get a reasonable-looking traceback that ends with an ImportError in which Nevow tried to import Twisted at install time. (Note that Nevow does not declare its install-time dependency on Twisted -- see http://divmod.org/trac/ticket/2629 .) """ File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 427, in easy_install return self.install_item(None, spec, tmpdir, deps, True) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 478, in install_item self.process_distribution(spec, dist, deps) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 519, in process_distribution [requirement], self.local_index, self.easy_install File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/pkg_resources.py", line 522, in resolve dist = best[req.key] = env.best_match(req, self, installer) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/pkg_resources.py", line 758, in best_match return self.obtain(req, installer) # try and download/install File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/pkg_resources.py", line 770, in obtain return installer(requirement) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 446, in easy_install return self.install_item(spec, dist.location, tmpdir, deps) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 476, in install_item dists = self.install_eggs(spec, download, tmpdir) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 655, in install_eggs return self.build_and_install(setup_script, setup_base) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 930, in build_and_install self.run_setup(setup_script, setup_base, args) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 919, in run_setup run_setup(setup_script, args) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/sandbox.py", line 27, in run_setup lambda: execfile( File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/sandbox.py", line 63, in run return func() File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/sandbox.py", line 29, in <lambda> {'__file__':setup_script, '__name__':'__main__'} File "setup.py", line 8, in <module> File "/tmp/easy_install-1aI_wu/Nevow-0.9.31/setupcommon.py", line 2, in <module> File "/tmp/easy_install-1aI_wu/Nevow-0.9.31/nevow/__init__.py", line 5, in <module> File "/tmp/easy_install-1aI_wu/Nevow-0.9.31/nevow/_version.py", line 2, in <module> ImportError: No module named twisted.python """ This is the same behavior as if you had simply executed "easy_install Nevow". The _version.py file in question is visible here: http://divmod.org/trac/browser/trunk/Nevow/nevow/_version.py?rev=14968 However, if you try to install this minimal project: """ import setuptools setuptools.setup(name="minproj_that_needs_nevow", setup_requires=["Twisted"], install_requires=["Nevow"] """ You'll get a slightly strange error message which suggests that Nevow got further in its attempt to use Twisted, but not far enough: """ File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 478, in install_item self.process_distribution(spec, dist, deps) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 519, in process_distribution [requirement], self.local_index, self.easy_install File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/pkg_resources.py", line 522, in resolve dist = best[req.key] = env.best_match(req, self, installer) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/pkg_resources.py", line 758, in best_match return self.obtain(req, installer) # try and download/install File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/pkg_resources.py", line 770, in obtain return installer(requirement) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 446, in easy_install return self.install_item(spec, dist.location, tmpdir, deps) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 476, in install_item dists = self.install_eggs(spec, download, tmpdir) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 655, in install_eggs return self.build_and_install(setup_script, setup_base) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 930, in build_and_install self.run_setup(setup_script, setup_base, args) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/command/easy_install.py", line 919, in run_setup run_setup(setup_script, args) File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/sandbox.py", line 27, in run_setup lambda: execfile( File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/sandbox.py", line 63, in run return func() File "/usr/local/stow/python-release25-maint-2008-05-30/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg/setuptools/sandbox.py", line 29, in <lambda> {'__file__':setup_script, '__name__':'__main__'} File "setup.py", line 8, in <module> File "/tmp/easy_install-Nib-SJ/Nevow-0.9.31/setupcommon.py", line 2, in <module> File "/tmp/easy_install-Nib-SJ/Nevow-0.9.31/nevow/__init__.py", line 10, in <module> ImportError: No module named components """ The __init__.py file in question is here: http://divmod.org/trac/browser/trunk/Nevow/nevow/__init__.py?rev=14968 Now if you try to install the actual project -- allmydata.org Tahoe -- from which this minimal project was extracted: http://allmydata.org/trac/tahoe/browser/setup.py You'll get a bizarre error message that takes the name of PIL in vain: """ File "/home/agl/src/allmydata-tahoe-1.0.0-r2613/setuptools-0.6c8.egg/setuptools/sandbox.py", line 27, in run_setup File "/home/agl/src/allmydata-tahoe-1.0.0-r2613/setuptools-0.6c8.egg/setuptools/sandbox.py", line 63, in run File "/home/agl/src/allmydata-tahoe-1.0.0-r2613/setuptools-0.6c8.egg/setuptools/sandbox.py", line 29, in <lambda> File "setup.py", line 8, in <module> # File "/tmp/easy_install-fqJkNC/Nevow-0.9.18/setupcommon.py", line 2, in <module> File "/usr/lib/python2.5/site-packages/PIL/__init__.py", line 10, in <module> # ImportError: No module named components """ Note that allmydata.org Tahoe does not use PIL in any way. There are no hits for "grep -r PIL ." in the Tahoe source tree. Going back to the minimal projects, we can tell that this effect has something to do with the presence or absence of a Twisted*.egg in the current working directory when "./setup.py install" is invoked. That is: If this minimal project is invoked in an empty directory (and also when no Twisted, Nevow, or zope.interface installed in the system), then we get the weird error about failure to import components even though the earlier "from twisted.python import versions" succeeded. This will leave a Twisted .egg in the CWD. If it is invoked in an otherwise empty directory that has a Twisted egg, then it will succeed (and leave a Twisted .egg in the CWD). (Hm. Actually now that I look in the target install directory, I see that it installed Nevow into there but not Twisted or zope.interface (which Twisted requires). It seems like that is a problem, but it is probably a separate problem from this ticket.) ---------- messages: 35 nosy: zooko priority: bug status: unread title: package required at build time seems to be not fully present at install time? _______________________________________________ Setuptools tracker <setuptools@bugs.python.org> <http://bugs.python.org/setuptools/issue20> _______________________________________________