Setup virtual env for appengine

mkappenginevenv.sh

#!/bin/bash
# 
# Build a virtual environment suitable for running appengine. 
# This uses virtualenvwrapper to make the virtual environment
# and modifies the postactivate/postdeactivate scripts to make
# the appengine code happy.
#
# Usage:
#   $ curl -s https://raw.github.com/gist/1012769 | bash
#
#
# Install steps:
# 1) Checks for virtualenvwrapper and install if needed.
# 2) Activates virtualenvwrapper and creates $WORKON_HOME
# 3) Makes 'appengine' virtual environment
# 4) Modifies postactivate scripts
# 5) Downloads and extracts google appengine source
# 6) pip installs a few extra packages
# 
#

# Modify me as new versions are released.
APPENGINE_VERSION=google_appengine_1.5.0.zip

PLATFORM=`uname -s`

which virtualenvwrapper.sh
VWNOTFOUND=$?

if (( $VWNOTFOUND == 1 ))
then
	echo 'Installing virtualenvwrapper...'
        sudo easy_install virtualenvwrapper
fi

if [[ ! $WORKON_HOME ]]
then
        export WORKON_HOME=$HOME/envs
fi

# make sure we are not dealing with a customize path
unset PYTHONPATH

mkdir -p $WORKON_HOME
source `which virtualenvwrapper.sh`

cd $WORKON_HOME

if [[ -e appengine ]] 
then
     echo "Deleting existing appengine ENV"
     rm -rf appengine
fi

mkvirtualenv --no-site-packages --distribute --python=python2.5 appengine

if [[ ! $VIRTUAL_ENV ]]
then
     echo "Problem running mkvirtualenv!"
     exit 1
fi

# Don't download the file over again.
if [ ! -e $APPENGINE_VERSION ]
then
    curl -O http://googleappengine.googlecode.com/files/$APPENGINE_VERSION
fi

echo "Extracting Google App Engine source..."
unzip -q $APPENGINE_VERSION -d $VIRTUAL_ENV

# Create a pth file for App Engine source
echo "$VIRTUAL_ENV/google_appengine" > $VIRTUAL_ENV/lib/python2.5/site-packages/gae.pth

# Link scripts
cd $VIRTUAL_ENV/bin
ln -s $VIRTUAL_ENV/google_appengine/*.py .

# link os.pyc to make appengine happy
REALPREFIX=`python2.5 -c "import sys;print sys.real_prefix"`
cd $VIRTUAL_ENV/lib/python2.5
echo "Linking os.pyc to $REALPREFIX/lib/python2.5/os.pyc"
rm -rf os.pyc
ln -s $REALPREFIX/lib/python2.5/os.pyc

# On mac's add some compiler flags.
if [[ $PLATFORM -eq "Darwin" ]]
then
     ARCHFLAGS="-arch i386 -arch x86_64"
fi

for package in webtest PIL fabric coverage django==1.1
do
    echo "Installing $package ..."
    pip install -q $package
done

# SSL needs to be installed with sudo!! lame!
echo "Installing ssl with sudo:"
sudo pip install -q ssl
echo "Fixing perms"
sudo chown -R `whoami` $VIRTUAL_ENV

# uninstall webob as it conflicts with the bundled one in app engine.
echo "Uninstalling webob ..."
pip uninstall -q -y webob

echo "You are ready to roll. Edit .bashrc as needed and run 'workon appengine'"

if (( $VWNOTFOUND == 1 ))
then
        echo "Virtualenvwrapper has been installed."
        echo "Please add the following to your .bashrc file:"
        echo ' export WORKON_HOME=$HOME/envs'
        echo ' source `which virtualenvwrapper.sh`'
fi