revolver 0.0.5

Pythonic server orchestrating based on fabric / cuisine

# [Revolver][]

[](http://travis-ci.org/michaelcontento/revolver)

## About

*TL;DR Wrapper for [Fabric][] and [Cuisine][] to achieve a clean, simple and
fun to use interface amplified with new high-level functions to quickly
orchestrate your servers.*

***

Let me introduce you two other awesome tools / libraries, before I try to
explain the gap [Revolver][] tries to fill. First there is [Fabric][], a very
small and low-level wrapper around SSH written in [Python][]. It allows you to
store a small *fabfile.py* next to your project, where you can define all the
steps required to automate something via SSH on one to multiple servers (e.g.
install and configure your software stack, deploy new versions, ...).

But [Fabric][] is *really* low-level and there is a lack of fun. That's the
point where [Cuisine][] joins the ring, because it's a collection of useful
methods which really increases your amount of fun and pleasure. Unfortunately
with some small, but really annoying, differences that are sometimes even
incompatible. Some examples?

# Fabric
run('apt-get install XYZ', use_sudo=True)

# Cuisine
with mode_sudo():
run('apt-get install XYZ')

I really enjoy the contextmanager for running a block as superuser! But
[Cuisine][] didn't patch all commands provided by [Fabric][] (`run()` in the
example is patched but other commands, like `put()`, aren't and you'll run into
strange / annoying errors).

There is also a different scheme of naming things. [Fabric][] tends to use short
function names inside clean namespaces (e.g `fabric.contrib.files.append`).
But the API of [Cuisine][], on the other hand, follows `<object>_<operation>`
(e.g. `cuisine.file_append`).

Both ways are reasonable and I don't wanna blame someone! Don't get me wrong!
I simply want a "cleaner" or "more compatible" API which I can extend with my
own new functions and keep the level of fun and pleasure high (at least for
me). And the last sentence is a short / good description of what [Revolver][]
is about. Just a "unification" wrapper for [Fabric][] and [Cuisine][] with some
new batteries included.

## Getting started

This project is currently not published to the official python package
repository but it should be easy to get everything running:

sudo easy_install https://github.com/michaelcontento/revolver/tarball/master

Or use the new alternate installer [Pip][]:

sudo pip install https://github.com/michaelcontento/revolver/tarball/master#egg=revolver

Now [Revolver][] is installed and ready to use. But I would suggest to
first read the documentation from [Fabric][] to get used with the whole
workflow / principle. After that it should be easy for you to dig into the
code, discover everything and write your first own `fabfile.py`.

## Example

But for those who want to see fast results, here is a small example
`fabfile.py`.

# -*- coding: utf-8 -*-

from revolver import user
from revolver import contextmanager as ctx
from revolver.project import Deployinator
from revolver.core import env
from revolver.tool import php
from revolver.tool import ruby

env.hosts = ['[e-mail]']

def setup():
php.install(version='5.3.9')
ruby.ensure(version='1.9.2-p290')
user.ensure('own-user', home='/var/own-user')

def deploy():
with ctx.sudo(username='own-user'):
dp = Deployinator()
dp.run()

## Contributing

* Fork this project
* Make your changes (new features, bugfixes, examples, ...)
* Write tests for it
* Be sure that *all other* tests are still green
* Send me a pull request

Too complicated? You just wanna mess around for yourself? Thats fine! Just
skip everything after step two :)

## License

Copyright 2009-2012 Michael Contento <[e-mail]>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

[Pip]: http://www.pip-installer.org
[Cuisine]: https://github.com/sebastien/cuisine
[Fabric]: https://github.com/fabric/fabric
[Python]: http://python.org
[Revolver]: https://github.com/michaelcontento/revolver