Rails framework upgrades with git-bisect (brad.posterous.com)

If you're handy with shell scripts, you can do:

  git bisect run my_script

my_script should return 1 if tests failed, or 0 if they passed. Git will then go off and find the commit that broke things.

My brain just gitsploded. More like this, please.

The coolest part of git bisect is the run option: http://tlrobinson.net/blog/2008/10/01/git-bisect-run/

If you can write a shell script that returns 0 when the test passes and 1 when it doesn't, git bisect run will do the tedious part for you.

I can personally vouch for the awesomeness of 'git bisect', especially when combined with 'git rebase' to reconstruct trees minus troublesome commits.

Like many tools, I think git bisect's advantage comes from reducing the amount of thinking that you need to do to accomplish a task. Before git bisect I'd often stare at pieces of broken code or poke around in a debugger for hours on end. Now, ~1 hr or so with git bisect and friends, and the job is done...and I get to spend brain cycles thinking about something else.

If anyone needs to bisect an intermittent bug, I have written a bayesian version of git bisect. It can be found at: http://github.com/Ealdwulf/bbchop/tree/master