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#!/usr/bin/env bash
set -u
usage() {
cat <<EOF
Usage: sync-tree [-h] [-c] [-x] SOURCE/ DEST/
Make the DEST tree match SOURCE as closely as possible
OPTIONS:
-h
Display help
EOF
}
while getopts "h" OPTION
do
case "$OPTION" in
h) usage; exit 0;;
?) usage 1>&2; exit 1;;
esac
done
shift $(($OPTIND - 1)) || exit $?
if ! test $# -eq 2
then
usage 1>&2
exit 1
fi
src="$1"
dest="$2"
rsync_opts="-aH --delete"
rsync_version=$(rsync --version)
if [[ ! "$rsync_version" =~ "ACLs" ]] || [[ "$rsync_version" =~ "no ACLs" ]]; then
echo "Not syncing ACLs (not supported by available rsync)" 1>&2
else
case $OSTYPE in
cygwin|darwin|netbsd)
echo "Not syncing ACLs (not yet supported on $OSTYPE)" 1>&2
;;
*)
rsync_opts="$rsync_opts -A"
;;
esac
fi
xattrs_available=''
if [[ ! "$rsync_version" =~ "xattrs" ]] || [[ "$rsync_version" =~ "no xattrs" ]]; then
echo "Not syncing xattrs (not supported by available rsync)" 1>&2
else
xattrs_available=yes
fi
# rsync may fail if -X is specified and the filesystems don't support
# xattrs.
if test "$xattrs_available"; then
rsync $rsync_opts -X "$src" "$dest"
if test $? -ne 0; then
# Try again without -X
exec rsync $rsync_opts "$src" "$dest"
fi
else
exec rsync $rsync_opts "$src" "$dest"
fi
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