pre-commit

#!/usr/bin/env bash
#
# A hook script called by "git commit" with no arguments. The hook should
# exit with non-zero status after issuing an appropriate message if it wants
# to stop the commit.

SELF_DIR=`git rev-parse --show-toplevel`
DATABASE=$SELF_DIR/.permissions

# Clear the permissions database file
> $DATABASE

echo -n "Backing-up permissions..."

IFS_OLD=$IFS; IFS=$'\n'
for FILE in `git ls-files --full-name`
do
   # Save the permissions of all the files in the index
   echo $FILE";"`stat -c "%a;%U;%G" $FILE` >> $DATABASE
done

for DIRECTORY in `git ls-files --full-name | xargs -n 1 dirname | uniq`
do
   # Save the permissions of all the directories in the index
   echo $DIRECTORY";"`stat -c "%a;%U;%G" $DIRECTORY` >> $DATABASE
done
IFS=$IFS_OLD

# Add the permissions database file to the index
git add $DATABASE -f

echo "OK"