#
#---- editb:    Edit file with archived backup
#
#---- John Battles (C) 2005 - License GPL 2 capgadget@gmail.com
#
#---- Usage:    editb editor file
#
#---- Example:  editb gedit please_dont_lose_me.c
#
# TODO  Save changes as a diff file
#       Add parameter tests
#

#
#--- Backup Dirs
#
if [ -d $EDIT_BACKUPS ]
then
  echo "Using backup archive directory $EDIT_BACKUPS"
else
  echo "$EDIT_BACKUPS does not exist attempting to create..."
  mkdir -v $EDIT_BACKUPS

  if [ -d $EDIT_BACKUPS ]
  then
  echo "Using backup archive directory $EDIT_BACKUPS"
    echo "Created $EDIT_BACKUPS"
  else
      echo "Cannot create $EDIT_BACKUPS"
      EDIT_BACKUPS="~/edit_backups"
      echo "Attempting to create $EDIT_BACKUPS ..."
      mkdir -v $EDIT_BACKUPS
  fi
fi

echo "EDIT_BACKUPS = <$EDIT_BACKUPS>"
ls -l $EDIT_BACKUPS
if [ -d $EDIT_BACKUPS ]
  then
    echo "Continuing..."
else
  echo "Unable to use backup directory $EDIT_BACKUPS.  Something is screwed.  Aborting..."
  sleep 3
  exit
fi

nowtime="`date +%Y%m%d%H%M%S`"
bckfile="`basename $2`"
orgsha1sum="`sha1sum $2|awk '{print $1}'`"
echo "Original sha1sum = <$orgsha1sum>"
cat $2|bzip2  >$EDIT_BACKUPS/$bckfile.$nowtime.bz2 &
echo "Backed up $2 to $EDIT_BACKUPS/$bckfile"
sleep 1

$1 $2

newsha1sum="`sha1sum $2|awk '{print $1}'`"
echo "New sha1sum = <$newsha1sum>"

if [  $orgsha1sum = $newsha1sum ]
then
  echo "$2 Unchanged deleting backup <$EDIT_BACKUPS/$bckfile.$nowtime.bz2>"
  rm -vf $EDIT_BACKUPS/$bckfile.$nowtime.bz2
else
  echo "$2 Changed"
  sleep 1
  nowtime="`date +%Y%m%d%I%M%S`"
  cp -pv $2 $EDIT_BACKUPS/$bckfile.$nowtime
  cd $EDIT_BACKUPS
  echo "Making backup..."
  bzip2 -f  $EDIT_BACKUPS/$bckfile.$nowtime &
  sleep 1
fi

# END EDITB