template jenkins/hudson build script for python with virtualenv

jenkins.sh

# WORKSPACE set to job workspace by jenkins/hudson
VENV="$WORKSPACE/.env"

if [ ! -e "$VENV" ]; then
    virtualenv --python python2.6 --no-site-packages $VENV
elif [ ! -d "$VENV" ]; then
    echo '$VENV exists but is not a directory'
    exit 1
fi

. .env/bin/activate

python setup.py develop
nosetests --with-xunit test/

deactivate

# follow this up by publishing nostests.xml as JUnit test result report
# you could also have the xunit report generated at an alternate location/name using --xunit-file argument