Has anyone got a script for git that can go through the history, check out each version, apply a cleanup script, then check the cleaned version into another repository?
I have some code which I've been developing, but I haven't been consistent with code formatting e.g. tabs vs spaces etc. I'd like to rewrite my entire history to be consistent with the new standards.
git filter-branch does what you need.
For example:
git-filter-branch --tree-filter 'find . -type f | xargs sed -i "s/\t/ /"'
Untested ... but it should do what you want...
But be careful... this transforms the git repository. If somebody has a clone... it will not be connected to your new repo anymore.
(while technically not an answer).
Please don't modify history. It's there for a reason - for you to learn from it. Don't abuse the power of git.