# vim:et sts=2 sw=2 ft=zsh
local git_root
git_root=$(git-root) || return 1

if [[ ${PWD} != ${git_root} ]]; then
  print "${0}: must be run from the root of the work tree" >&2
  return 1
fi

local src="${1}"
local dst="${2}"
local url=$(command git config --file .gitmodules --get "submodule.${src}.url")
if [[ -z "${url}" ]]; then
  print "${0}: submodule not found: ${src}" >&2
  return 1
fi

mkdir -p "${dst:h}"
git-submodule-remove "${src}"
git submodule add "${url}" "${dst}"

return 0