Simple git continuous integration
Posted by Chad Humphries 3 months ago / Source: http://reinh.com/2008/02/21/simple-git-continuous-integration.html 
Preventing your developers (and yourself) from breaking the build is as simple as putting this in your .git/hooks/pre-commit and making it executable (chmod +x .git/hooks/pre-commit).
#!/bin/sh
rake spec 2> /dev/null
This will stop the commit if the specs don’t pass.
Language Shell/Scripting / Tagged with git