zc.buildout在今天的常规修补程序中随机中断

Question

今天，在生产机器上部署一个安全修补程序，zc.buildout就会随机中断。我已经试着升级pip了，但这仍然不能解决问题。

$ ./bin/buildout 
mr.developer: Queued 'django-appregister' for checkout.
mr.developer: Queued 'django-countries' for checkout.
mr.developer: Queued 'django-mailer' for checkout.
mr.developer: Queued 'django-ostinato' for checkout.
mr.developer: Skipped checkout of existing package 'django-appregister'.
mr.developer: Skipped checkout of existing package 'django-countries'.
mr.developer: Skipped checkout of existing package 'django-mailer'.
mr.developer: Skipped checkout of existing package 'django-ostinato'.
Develop: '/home/evopoints/webapp/src/django-ostinato'
/usr/lib/python2.7/dist-packages/setuptools/dist.py:364: UserWarning: Normalizing '1.1.beta' to '1.1b0'
normalized_version,
warning: no previously-included files matching '*.pyc' found anywhere in distribution
Develop: '/home/evopoints/webapp/src/django-mailer'
Develop: '/home/evopoints/webapp/src/django-countries'
Develop: '/home/evopoints/webapp/src/django-appregister'
/usr/lib/python2.7/dist-packages/setuptools/dist.py:364: UserWarning: Normalizing '0.4.dev' to '0.4.dev0'
normalized_version,
Unused options for buildout: 'include-site-packages' 'unzip'.
Updating _mr.developer.
Installing python.
While:
Installing python.

An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
File "/home/evopoints/webapp/eggs/zc.buildout-2.9.4-py2.7.egg/zc/buildout/buildout.py", line 2123, in main
    getattr(buildout, command)(args)
File "/home/evopoints/webapp/eggs/zc.buildout-2.9.4-py2.7.egg/zc/buildout/buildout.py", line 796, in install
    installed_files = self[part]._call(recipe.install)
File "/home/evopoints/webapp/eggs/zc.buildout-2.9.4-py2.7.egg/zc/buildout/buildout.py", line 1553, in _call
    return f()
File "/home/evopoints/webapp/eggs/zc.recipe.egg-2.0.3-py2.7.egg/zc/recipe/egg/egg.py", line 126, in install
    reqs, ws = self.working_set()
File "/home/evopoints/webapp/eggs/zc.recipe.egg-2.0.3-py2.7.egg/zc/recipe/egg/egg.py", line 84, in working_set
    allow_hosts=self.allow_hosts)
File "/home/evopoints/webapp/eggs/zc.buildout-2.9.4-py2.7.egg/zc/buildout/easy_install.py", line 913, in install
    return installer.install(specs, working_set)
File "/home/evopoints/webapp/eggs/zc.buildout-2.9.4-py2.7.egg/zc/buildout/easy_install.py", line 657, in install
    for spec in specs]
File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2879, in parse
    req, = parse_requirements(s)
ValueError: need more than 0 values to unpack

为什么这种情况是随机发生的？(这已经不是第一次了)现在我不得不完全放弃构建，因为它太不可靠了，客户端生产站点在他的站点代码中的一个小补丁中会随机失败。

Answer 1

如果使用-vvvv运行buildout，您可能会看到实际的错误。在我的经验中，“需要超过0的值才能解压”错误有时会发生在下载某些内容时出现错误。

还可以帮助您升级setuptools和zc.buildout的版本(2.12.0已经退出，您正在使用2.9.4)。为了补偿环境中的变化(最常见的是setuptools中的更改)，需要构建大量的修补程序。

注意，pypi也移动了。从http到https，从pypi.python.org到pypi.org。因此，调整您的index=行(如果有)可能会节省一堆重定向，这也可以工作。

在过去的几个月里，我没有看到任何严重的建筑破损，至少github问题跟踪器已经安静下来了:-)

Answer 2

将interpreter选项从python改为python2.7帮助我在类似的情况下：

[buildout]
parts =
  python

[python]
# ...
interpreter = python2.7