python - 如何强制buildout使用已经安装的包

Question

在服务器上，为了磁盘优化，我们不安装C编译器，这是问题所在:

我想用 buildout 2.3.1 安装 'spur' python 包，spur 使用需要 C 编译器的 pycrypto。

为了避免编译，我在服务器 (Suse 11SP2) 上安装了 rpm python-pycrypto (python-pycrypto-2.6-31.7.x86_64.rpm)。我可以使用“pip freeze”检查是否安装了 pycrypto:

pip freeze 

lxml==2.1.2
mod-python==3.3.1
Numeric==24.2
numpy==1.3.0
pycrypto==2.6
pywbem==0.7.0
PyXML==0.8.4

然而，当我开始构建时，它仍然会尝试使用不存在的 C 编译器构建 pycrypto。

所以我在 buildout.cfg 中添加了 include-site-packages = true 和 allowed-eggs-from-site-packages = pycrypto，但没有考虑到它们。我也尝试做一个:

python bootstrap.py --allow-site-packages
bin/buildout

但这也没有帮助。

我该怎么做才能避免 buildout 编译已经从 rpm 编译和安装的包？

这是buildout.cfg

[buildout]
newest = false
extensions = gp.vcsdevelop
develop-dir = src
parts = eggs tests wsgi
include-site-packages = true
allowed-eggs-from-site-packages = pycrypto

eggs =
    Django==1.4.8
    ordereddict
    ipython==0.13.2
    django-webtest
    django-grappelli<2.5.0
    django-bootstrap3-datetimepicker
    z3c.recipe.usercrontab
    rrdgraphs
    south
    achilterm
    pynag
    pyaml<14
    DjangoDevKit==1.0.3
    Sphinx
    xlwt
    xlrd
    spur

...

和日志:

# bin/buildout
Unused options for buildout: 'allowed-eggs-from-site-packages' 'include-site-packages'.
Installing eggs.
Getting distribution for 'pycrypto!=2.4,>=2.1'.
configure: error: in `/tmp/easy_install-QFXca_/pycrypto-2.6.1':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 2254, in main

  File "/usr/lib64/python2.6/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/usr/lib64/python2.6/distutils/dist.py", line 975, in run_commands
    self.run_command(cmd)
  File "/usr/lib64/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 380, in run

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 610, in easy_install

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 659, in install_item

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 842, in install_eggs

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 1070, in build_and_install

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 1056, in run_setup

  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 240, in run_setup
  File "/usr/lib64/python2.6/contextlib.py", line 34, in __exit__
    self.gen.throw(type, value, traceback)
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 193, in setup_context
  File "/usr/lib64/python2.6/contextlib.py", line 34, in __exit__
    self.gen.throw(type, value, traceback)
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 164, in save_modules
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 139, in resume
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 152, in save_modules
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 193, in setup_context
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 237, in run_setup
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 267, in run
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 236, in runner
  File "build/bdist.linux-x86_64/egg/setuptools/sandbox.py", line 46, in _execfile
  File "/tmp/easy_install-QFXca_/pycrypto-2.6.1/setup.py", line 456, in <module>
  File "/usr/lib64/python2.6/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/usr/lib64/python2.6/distutils/dist.py", line 975, in run_commands
    self.run_command(cmd)
  File "/usr/lib64/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "build/bdist.linux-x86_64/egg/setuptools/command/bdist_egg.py", line 160, in run
  File "build/bdist.linux-x86_64/egg/setuptools/command/bdist_egg.py", line 146, in call_command
  File "/usr/lib64/python2.6/distutils/cmd.py", line 333, in run_command
    self.distribution.run_command(command)
  File "/usr/lib64/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "build/bdist.linux-x86_64/egg/setuptools/command/install_lib.py", line 10, in run
  File "/usr/lib64/python2.6/distutils/command/install_lib.py", line 112, in build
    self.run_command('build_ext')
  File "/usr/lib64/python2.6/distutils/cmd.py", line 333, in run_command
    self.distribution.run_command(command)
  File "/usr/lib64/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "/tmp/easy_install-QFXca_/pycrypto-2.6.1/setup.py", line 251, in run
  File "/usr/lib64/python2.6/distutils/cmd.py", line 333, in run_command
    self.distribution.run_command(command)
  File "/usr/lib64/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "/tmp/easy_install-QFXca_/pycrypto-2.6.1/setup.py", line 278, in run
RuntimeError: autoconf error
An error occurred when trying to install pycrypto 2.6.1. Look above this message for any errors that were output by easy_install.
While:
  Installing eggs.
  Getting distribution for 'pycrypto!=2.4,>=2.1'.
Error: Couldn't install: pycrypto 2.6.1

Answer 1

我找到了解决方法:

我刚刚在 develop-eggs 目录中创建了一个 egg-link 文件:

$ cat develop-eggs/pycrypto.egg-link 
/usr/lib64/python2.6/site-packages