No more commits with debugging code

Most of you have certainly found yourself in the situation when after committing and pushing you realise you've forgotten to delete some code you added for debugging purpose? I am prone to it and after yet another doing it I decided to let git itself monitor my commits and prevent me from wrongdoing. From me does it require to put a comment in the file I do not want to be committed before all the junk is gone.

To do so, you need to create .git/hooks/pre-commit file (or append to the existing one):

#!/bin/sh

if git rev-parse --verify HEAD >/dev/null 2>&1
then
 against=HEAD
else
 # Initial commit: diff against an empty tree object
 against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

# Redirect output to stderr.
exec 1>&2

for F in $(git status --short -uno --porcelain | egrep -v '^D' | awk '{ printf $2"\n"; }')
do
 if grep -iq nocommit "$F"; then
  cat <<EOF
Error: '$F' containts "no commit" comment.
You must delete it before it can be committed.
EOF
  exit 1
 fi
done

And add NOCOMMIT (case insensetive) somewhere in your file that you don't want to commit, i.e.

# NOCOMMIT
import pdb
a = foo(1, 4)
pdb.set_trace()

Hope it'll save some nerves for you.