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-Installing setuptools/distribute
---------------------------------
-
-Some initial test setup:
-
- >>> import sys
- >>> import zc.buildout
- >>> dest = tmpdir('sample-install')
-
-Setuptools (0.6something) is packaged as an ``.egg``. So when installing it,
-the egg is downloaded and used. Distribute is packaged as a tarball, which
-makes an easy_install call necessary. In older versions of buildout, the
-``_call_easy_install()`` method would call ``_get_dist()`` to get hold of the
-setuptools path for calling easy_install. When an updated "distribute" was
-found, this would try an install again, leading to an infinite recursion.
-
-The solution is to just use the setuptools location found at import time, like
-happens with the buildout and setuptools location that is inserted in scripts'
-paths.
-
-We test this corner case by patching the ``_get_dist()`` call:
-
- >>> def mock_get_dist(requirement, ws, always_unzip):
- ... raise RuntimeError("We should not get called")
-
-When installing setuptools itself, we expect the "Getting dist" message not to
-be printed. We call ``_call_easy_install()`` directly and get an error
-because of a non-existing tarball, but that's the OK for this corner case
-test: we only want to test that ``_get_dist()`` isn't getting called:
-
- >>> class MockDist(object):
- ... def __str__(self):
- ... return 'nonexisting.tgz'
- ... @property
- ... def project_name(self):
- ... # Testing corner case: there *is* actually
- ... # a newer setuptools package on pypi than we
- ... # are running with, so it really installs it
- ... # and compares project_name. We're past the
- ... # point that we're testing, so we just raise
- ... # the normally expected error.
- ... raise zc.buildout.UserError(
- ... "Couldn't install: nonexisting.tgz")
- >>> dist = MockDist()
-
- >>> installer = zc.buildout.easy_install.Installer(
- ... dest=dest,
- ... links=[link_server],
- ... index=link_server+'index/',
- ... executable=sys.executable,
- ... always_unzip=True)
- >>> installer._get_dist = mock_get_dist
- >>> installer._call_easy_install('setuptools', None, dest, dist)
- Traceback (most recent call last):
- ...
- UserError: Couldn't install: nonexisting.tgz