Sanity check for setuptools 15.0

[jaraco]

I've tagged and uploaded a b1 release of setuptools 15.0. This release re-attempts a change that once failed due to assumptions in buildout which I believe have since been corrected.

Can someone test and confirm that the 15.0b1 release is suitable and won't likely create unmanageable breakage in the buildout community?

[jimfulton]

Thanks very much for checking in.

I tried it on a few of my buildouts and it seems to work fine, although my buildouts tend to be pretty tame. :)

I tested this by copying the release to my download cache (the dist subdirectory), made sure I wasn't pinning setuptools in a versions section and then ran buildout like this:

bin/buildout prefer-final=false 

Hopefully, some others here will try out this release too.

[mauritsvanrees]

I tried a few buildouts and it went fine.
But I did not know where to look for. You are talking about this changelog entry, right?

Let's try to break it. Ah, setuptools 15.0b1 in combination with zc.buildout 2.2.1 will fail. zc.buildout 2.2.2 or higher works fine. Here is a buildout config to test it:

[buildout]
parts =
    test
versions = versions
show-picked-versions = true

[versions]
# Working fine:
# setuptools = 14.3.1
# zc.buildout = 2.2.1

# Also working fine:
# setuptools = 15.0b1
# zc.buildout = 2.3.1

# Also working fine:
# setuptools = 15.0b1
# zc.buildout = 2.2.5

# Giving traceback:
setuptools = 15.0b1
zc.buildout = 2.2.1

# Other version pins:
six = 1.9.0
zc.recipe.egg = 2.0.1
zc.recipe.testrunner = 2.0.0
zope.exceptions = 4.0.7
zope.interface = 4.1.2
zope.testrunner = 4.4.7

[test]
recipe = zc.recipe.testrunner
eggs = zc.buildout

It goes wrong like this:

$ bin/buildout 
While:
  Installing.
  Getting section test.
  Initializing section test.
  Installing recipe zc.recipe.testrunner.

An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/buildout.py", line 1942, in main
    getattr(buildout, command)(args)
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/buildout.py", line 506, in install
    [self[part]['recipe'] for part in install_parts]
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/buildout.py", line 1094, in __getitem__
    options._initialize()
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/buildout.py", line 1198, in _initialize
    self.initialize()
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/buildout.py", line 1204, in initialize
    recipe_class = _install_and_load(reqs, 'zc.buildout', entry, buildout)
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/buildout.py", line 1158, in _install_and_load
    allow_hosts=buildout._allow_hosts
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/easy_install.py", line 812, in install
    return installer.install(specs, working_set)
  File "/Users/mauritsvanrees/shared-eggs/zc.buildout-2.2.1-py2.7.egg/zc/buildout/easy_install.py", line 643, in install
    [requirement] = err.args
ValueError: too many values to unpack

Reason it works fine with setuptools 14.3.1 is because in a pdb you get this:

(Pdb) err
DistributionNotFound(Requirement.parse('zope.testrunner'),)
(Pdb) err.args
(Requirement.parse('zope.testrunner'),)

And with the setuptools beta you get this:

(Pdb) err
DistributionNotFound(Requirement.parse('zope.testrunner'), set(['zc.recipe.testrunner']))
(Pdb) err.args
(Requirement.parse('zope.testrunner'), set(['zc.recipe.testrunner']))

(Note that there is nothing wrong with the requirement here. The exception simply means that zope.testrunner is not found locally, so zc.buildout enters a code section where it tries to get it from PyPI.)

So there are certainly versions of zc.buildout that will break with this new setuptools version. At least 2.2.0 and 2.2.1, maybe others. But newer versions in the 2.2.x line work fine. And I see that the 2.1.x series wants distribute instead of setuptools, so that series seems no concern.
So: should be okay.

[jaraco]

Awesome. Thanks for the help.