zc.buildout 在今天的常规补丁中随机损坏

Question

今天将安全补丁部署到生产机器上 zc.buildout 随机中断。我已经尝试升级 pip，但仍然无法解决问题。

$ ./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

为什么这种情况会随机发生？（这不是第一次了）现在到了我将不得不放弃扩建的地步完全，因为它太不可靠了，客户生产站点随机在他的站点代码的一个小补丁中失败。

Answer 1

将 interpreter 选项从 python 更改为 python2.7 在类似情况下帮助了我：

[buildout]
parts =
  python

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

Answer 2

如果您运行使用 -vvvv 构建，您可能会看到实际错误。根据我的经验，"need more than 0 values to unpack" 错误有时会在下载内容出错时发生。

升级您的 setuptools 和 zc.buildout 版本（2.12.0 已发布，您正在使用 2.9.4）也有帮助。已经有相当多的构建修复来补偿环境的变化（最常见的是设置工具的变化）。

注意pypi也动了。从 http 到 https，从 pypi.python.org 到 pypi.org。所以调整你的 index= 行（如果你有的话）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构建中断，至少 github 问题跟踪器一直很安静:-)

zc.buildout 在今天的常规补丁中随机损坏

zc.buildout randomly broke during routine patch today

python

pip

setuptools

buildout

python-2.7