#!/bin/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

IFS_OLD=$IFS; IFS=$'\n'
echo -n "Backing-up file permissions ... "

DIRS=()

for FILE in `git ls-files`
do
   # Save the permissions of all files in the index
   echo $FILE";"`stat -c "%a;%U;%G" $FILE` >> $DATABASE
   FILE_DIR=$(dirname "$FILE")
   if ! [[ " ${DIRS[@]} " =~ " ${FILE_DIR} " ]]; then
      DIRS+=("$FILE_DIR");
   fi
done

echo -n "and directory permissions ... "
for DIR in "${DIRS[@]}"
do
   # Save the permissions of all directories in the index
   echo $DIR";"`stat -c "%a;%U;%G" $DIR` >> $DATABASE
done

IFS=$IFS_OLD

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

echo "OK"