#!/bin/sh

# Note: this is designed to also work across machines (i.e. remotely). For
# local-only directory comparisons where permissions, mod-times, etc... can be
# ignored, you can actually do this with just 'diff':
# $ diff --recursive --brief DIR1 DIR2

if [ "$#" != 2 ]; then
    echo "usage: fsdiff.sh [DIR1] [DIR2]"
    echo "Compare files from directory DIR2 to directory DIR1"
    exit 1
fi

# Note: '--itemize-changes' is a useful option sometimes.
# symmetrical diff (compare both directories to one another; differences in
# DIR2 will be preceeded by 'deleted')
rsync_flags="--recursive --links --verbose --checksum --delete --dry-run"
# directional diff (compare DIR2 to contents of DIR1)
#rsync_flags="--recursive --links --verbose --checksum --dry-run"

#echo "By default, prints files which are different in ${1}"
#echo "'deleting' means the file is different/new in ${2} (not present in ${1})"
rsync $rsync_flags "${1}/" "${2}"