# replace default cp with rsync.
function cp() {
	rsync -ahP --chmod=u+w -- "${@}"
}

# copy and also merge all changes (delete dst files that do not exist in src).
function cp_merge() {
	rsync -ahP --chmod=u+w --delete -- "${@}"
}

# copy by creating hardlinks.
function cp_link() {
	/usr/bin/cp -lr -- "${@}"
}

# default cp, a.k.a builtin cp.
function bcp() {
	/usr/bin/cp "${@}"
}

# cp_merge without writing anything.
function cp_test() {
	rsync -ahP --chmod=u+w --delete -n -- "${@}"
}