6

我正在用 python 2.7 编写游戏,并且想要编写游戏开发环境的“引导程序”脚本,然后调用shovel。如果未检测到 virtualenvwrapper,我将使用virtualenv 引导解决方案。但是,如果检测到 virtualenvwrapper 我想改用它。

问题是我的引导脚本没有继承 virtualenvwrapper 内联 shell 函数。据我所知,这排除了运行“mkvirtualenv NotOrion”之类的东西。由于设置了环境变量“VIRTUALENVWRAPPER_VIRTUALENV” 在我的情况下,来自macports : /opt/local/bin/virtualenv-2.7),我尝试直接使用它:

#!/usr/bin/env bash

# Name your first "bootstrap" environment:
ENV_NAME=NotOrion
# Options for your first environment:
ENV_OPTS='--no-site-packages --distribute'

unset PYTHONDONTWRITEBYTECODE

function create_virtualenvwrapper_venv {
  echo "installing into virtualenvwrapper directory"
  cd $WORKON_HOME
  $VIRTUALENVWRAPPER_VIRTUALENV $ENV_OPTS $ENV_NAME
  cd -
  #mkvirtualenv $ENV_NAME
  #workon $ENV_NAME
}

function create_standalone_venv {
  # not run/snipped
}

if [ -z "$VIRTUALENVWRAPPER_VIRTUALENV" ]; then
  create_standalone_venv
else
  create_virtualenvwrapper_venv
fi

pip install shovel
shovel help

我的引导脚本完成安装铲子。但是运行 shovel (例如最后一行)会产生警告:

/Users/me/.virtualenvs/NotOrion/bin/shovel:25: UserWarning: Module argparse was already imported from /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/argparse.pyc, but /Users/me/.virtualenvs/NotOrion/lib/python2.7/site-packages is being added to sys.path
import pkg_resources
# normal shovel output snipped

那么有可能以某种方式从脚本中调用“mkvirtualenv”吗?如果不是,我可以从我的脚本中运行其他具有相同效果但产生警告的东西吗?

4

2 回答 2

12

您的脚本应该能够执行以下操作:

# 'which' will print absolute path to virtualenvwrapper.sh
source `which virtualenvwrapper.sh`

我将它用于一些部署脚本。

于 2012-10-28T19:22:59.287 回答
2

似乎没有“标准”的方式来做到这一点。所以我手动查看了各种可能的地方。凌乱,但它似乎是唯一的方法:

function find_virtualenvwrapper {
   # no consistent way to find 'virtualenvwrapper.sh', so try various methods
   # is it directly available in the path?
   virtualenvwrapper_path=$(which virtualenvwrapper.sh)
   if [ $? -eq 0 ]; then
      return
   fi
   # nope; how about something that looks like it in our path?
   # http://stackoverflow.com/questions/948008/linux-command-to-list-all-available-commands-and-aliases
   virtualenvwrapper_cmd=$(compgen -ac | grep -i 'virtualenvwrapper\.sh' | sort | uniq | head -1)
   if [ -n "$virtualenvwrapper_cmd" ]; then
      virtualenvwrapper_path=$(which $virtualenvwrapper_cmd)
      if [ $? -eq 0 ]; then
         return
      fi
   fi
   # still not; Debubuntu puts it in /etc/bash_completion.d
   virtualenvwrapper_path='/etc/bash_completion.d/virtualenvwrapper'
   if [ -e "$virtualenvwrapper_path" ]; then
      return
   fi
   # any other methods to find virtualenvwrapper can be added here
   echo "unable to find virtualenvwrapper.sh or anything that looks like it"
   exit 1
}
于 2012-11-15T13:31:30.270 回答