fab context manager to activate virtualenv before running command

gistfile1.py

'''See http://stackoverflow.com/a/5359988/120991
'''

from fabric.api import *
from contextlib import contextmanager


env.update(
    use_ssh_config=True,
    directory='/home/ubuntu/projects/thingy',
    activate='source /home/ubuntu/.virtualenvs/thingy/bin/activate',
    )


@contextmanager
def virtualenv():
    '''Context manager to activate virtualenv.
    '''
    with cd(env.directory):
        with prefix(env.activate):
            yield


def supervisor(command, process):
    with virtualenv():
        run('supervisor restart something')

thanks for this script