Like half the people commenting here, I wrote my own (https://bitbucket.org/koalephant/mallard/ https://bitbucket.org/koalephant/mallard/) in shell, after using

Like half the people commenting here, I wrote my own (https://bitbucket.org/koalephant/mallard/ https://bitbucket.org/koalephant/mallard/) in shell, after using another similar tool that’s written in python (and contributing some fixes to it). Same general concept as most others use, apply sql files by date, track what’s applied in the db itself, deploy the sql files with your code.