#!/bin/sh

usage () {
	cat <<EOF>&2
Usage: ${0##*/} SOURCE DEST

Use rsync to mirror SOURCE to DEST while showing progress.
SOURCE does not need to be ending with a trailing slash. Only size is used for
comparison. File perms and dates are mirrored.

A dry-run is made by default.

Options:

  -p: Process.

EOF
}

opt_dry="-n"
if [ "$1" = "-p" ]; then
	opt_dry=""
	shift
fi

[ $# -ne 2 ] && usage && exit 1
[ "$1" = "-h" ] && usage && exit
[ "$1" = "--" ] && shift

## We use archive mode '-a' which preserves perms and dates. On non-POSIX
## filesystems, you might want to skip this and preserve symlinks only by
## replacing -a with -lr.
rsync $opt_dry -iv -a --size-only --delete --exclude="/lost+found" --progress -- "$1"/ "$2"