running fabric script locally

Question

I have a django app and I wrote a fabric script that installs my app on deployment server (Cent OS 5).

Now I want to run the same fabric script locally on the deployment server.

Is there a way to do it without supplying ssh user and password?

I mean just with "-H localhost"?

Thanks, Alex A.

Answer 1

Yes, you can run fab locally by using method local instead of run. What I do typically is have methods for setting up the environment, and call these methods first before calling the actual task. Let me illustrate this with an example for your specific question

fabfile.py

    from fabric.operations import local as lrun, run     from fabric.api import task     from fabric.state import env      @task     def localhost():         env.run = lrun         env.hosts = ['localhost']      @task     def remote():         env.run = run         env.hosts = ['some.remote.host']      @task     def install():         env.run('deploymentcmd') 

And based on the environment, you can do the following

Install on localhost:

    fab localhost install 

Install on remote machine:

    fab remote install 

Answer 2

I am using another trick for executing remote task locally:

from fabric.api import run, sudo, local from contextlib import contextmanager  @contextmanager def locally():     global run     global sudo     global local     _run, _sudo = run, sudo     run = sudo = local     yield     run, sudo = _run, _sudo  def local_task():     with locally():         run("ls -la")