Goodcastle is a project mainly written in Ruby, it's free.
Goodcastle is a deployment script for Wordpress
=== goodcastle
A script for deploying Wordpress sites. Not as clever or as sophisiticated as capistrano; not terrible.
== Requirements
You'll need Ruby, Rubygems, along with the erubis gem. goodcastle is designed for use on unix-based systems, and assumes the presence of rsync. goodcastle assumes that it exists in the root of a git repository containing an entire Wordpress site. Other version control tools are available; goodcastle does not use them.
== Installation
Copy deploy.rb and deploy/ to the Wordpress site/git repository on your local machine, and add them to git. goodcastle does not deploy itself to servers.
== Usage
Fill out deploy/deploy-config.yml with your details; there's an example version of this file in the repository. You need only configure advanced-cache if you have WP Super Cache installed. You can generate the content for the 'secret_keys' block here: https://api.wordpress.org/secret-key/1.1/salt
The username is the user you would use to ssh in to your server, or to run rsync/scp to the location you wish to deploy to. I tend to create a deploy user for this purpose.
When you're ready to deploy:
ruby deploy.rb [branchname]
If no branch is specified, goodcastle deploys out of master.
Then, goodcastle: