Question

Can someone share a “origin” side hook that checks if the received commit introduces a wrong whitespace character (in my case tab) and rejects that push?

I can’t do it pre-commit because I have people on the team who are, well… oh, nevermind. 😉

Answer 1

The right place to do this is the update hook. I haven’t tested it, but something like this should work:

#!/bin/sh
branch=$1
oldrev=$2
newrev=$3

if git diff $oldrev..$newrev | grep -P '\+.*\t'; then
    echo When updating ref $branch: diff $oldrev..$newrev introduces tabs
    exit 1
fi