#!/bin/bash
# $Id: visamba,v 1.1 2002/09/24 14:28:22 nturner Exp $
#
set -e

function usage {
    (
    echo "
USAGE: edit-and-reload [OPTION]... <file> <reload-command>
DESCRIPTION:
Opens <file> for editing and then runs <reload-command> if the file is changed
after editing.  Uses md5sum to determine if file has changed.
OPTIONS:
  -h, --help:  show this help
  -v, --verbose:  output extra stuff when running
"
    ) >&2
}

TEMP=`getopt -o hv --long help,verbose -n edit-and-reload -- "$@"`
eval set -- "$TEMP"

help=
verbose=
while true; do
    case "$1" in
        -h|--help) help=1 ; shift ;;
        -v|--verbose) verbose=1 ; shift ;;
        --) shift ; break ;;
        *) echo "Error" ; exit 1 ;;
    esac
done

if [ "$help" ]; then
    usage
    exit 0
fi

if [ ! "$1" ]; then
    usage
    exit 1
fi

file="$1"; shift

hashBefore=`md5sum $file`
sudoedit "$file" || exit 1
if test "`md5sum $file`" != "$hashBefore"; then
    [ -n "$verbose" ] && echo "Running sudo $@"
    sudo "$@"
else
    echo "File contents unchanged."
fi