On 30 July 2015 at 05:27, Robert Collins <robe...@robertcollins.net> wrote:
> Similar to pbr, we have a minimum version of setuptools required to
> consistently install things in OpenStack. Right now thats 17.1.
>
> However, we don't declare a setup_requires version for it.
>
> I think we should.
>
> setuptools can't self-upgrade, and we don't have declarative deps yet,
> so one reaction I expect here is 'how will this help'.
>
> The problem lies in the failure modes. With no dependency declared,
> setuptools will try and *silently fail*, or try and fail with this one
> weird error - that doesn't say anything about 'setuptools 3.3. cannot
> handle PEP 426 version markers'.
>
> If we set a minimum (but not a maximum) setuptools version as a
> setup_requires, I think we'll signal our actual dependencies to
> redistributors, and folk consuiming python packages, in a much more
> direct fashion. They'll still have to recover manually, but thats ok
> IMO. As long as we don't set upper bounds, we won't deadlock ourselves
> like we did in the past.
These are the errors we get with this when the version present is too-old:
Firstly, 0.6c11 which detects the error and reports it.
Then 3.3 which attempts to upgrade setuptools just-in-time but of
course the old setuptools code is what executes, and so the error is
confusing :/. But still better than no hint at all: the presence of
the setuptools upgrade is a signal.
$ pip install setuptools==0.6c11
...
Successfully installed setuptools-0.6rc11
$ pip install .
Processing /home/robertc/work/mock
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 20, in <module>
File "/tmp/pip-wnBxi2-build/setup.py", line 6, in <module>
pbr=True)
File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File
"/home/robertc/.virtualenvs/test/local/lib/python2.7/site-packages/setuptools/dist.py",
line 260, in __init__
self.fetch_build_eggs(attrs.pop('setup_requires'))
File
"/home/robertc/.virtualenvs/test/local/lib/python2.7/site-packages/setuptools/dist.py",
line 284, in fetch_build_eggs
parse_requirements(requires), installer=self.fetch_build_egg
File
"/home/robertc/.virtualenvs/test/local/lib/python2.7/site-packages/pkg_resources.py",
line 569, in resolve
raise VersionConflict(dist,req) # XXX put more info here
pkg_resources.VersionConflict: (setuptools 0.6c11
(/home/robertc/.virtualenvs/test/lib/python2.7/site-packages),
Requirement.parse('setuptools>=17.1'))
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in
/tmp/pip-wnBxi2-build
************************************************************
$ pip install setuptools==3.3
Collecting setuptools==3.3
Downloading setuptools-3.3-py2.py3-none-any.whl (545kB)
100% |████████████████████████████████| 548kB 674kB/s
Installing collected packages: setuptools
Found existing installation: setuptools 18.0.1
Uninstalling setuptools-18.0.1:
Successfully uninstalled setuptools-18.0.1
Successfully installed setuptools-3.3
$ pip install .
Processing /home/robertc/work/mock
Complete output from command python setup.py egg_info:
Installed /tmp/pip-Grkk9a-build/setuptools-18.0.1-py2.7.egg
[pbr] Generating ChangeLog
error in setup command: Invalid environment marker:
(python_version<"3.3" and python_version>="3")
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in
/tmp/pip-Grkk9a-build
--
Robert Collins <rbtcoll...@hp.com>
Distinguished Technologist
HP Converged Cloud
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