#
# set -o errexit -o noglob are assumed.
#

pkgp_fetch_git() {
	local _tgtdir="${1}" _subdir="${2}" _url="${3}" _branch="${4}";
	if [ "${ARG_OFFLINE:-0}" -eq 0 ]; then
		if [ -e "${DLCACHEDIR}/${_subdir}" ]; then
			(ex_build_fileop cd "${DLCACHEDIR}/${_subdir}" &&\
				git pull origin "${_branch:-main}");
		else
			git clone "${_url}" "${DLCACHEDIR}/${_subdir}";
			if [ -n "${_branch}" -a		\
			     \( -z "${_branch#main}" \) -a	\
			     \( -z "${_branch#master}" \) ]; then
				(ex_build_fileop cd "${DLCACHEDIR}/${_subdir}"	&&\
					git checkout -b "${_branch}");
			fi;
		fi;
	fi;
	ex_build_fileop rm "${_tgtdir}/${_subdir}";
	ex_build_fileop cp "${DLCACHEDIR}/${_subdir}" "${_tgtdir}";
};

pkgp_fetch_urls_git() {
	local _tgtdir _url_spec _subdir _url _git_branch;
	_tgtdir="${1}"; shift; 
	for _url_spec in "${@}"; do
		_subdir="${_url_spec%=*}";
		_url="${_url_spec#*=}";
		_url="${_url%@*}";
		if [ "${_url_spec#*@}" != "${_url_spec}" ]; then
			_git_branch=${_url_spec#*@};
		fi;
		pkgp_fetch_git "${_tgtdir}" "${_subdir}" "${_url}" "${_git_branch}";
	done;
};

pkg_fetch_git() {
	if [ ${#} -gt 0 ]; then
		pkgp_fetch_urls_git "${PKG_BASE_DIR}" "${@}";
	else
		if [ -n "${PKG_URLS_GIT}" ]; then
			pkgp_fetch_urls_git "${PKG_BASE_DIR}" ${PKG_URLS_GIT};
		fi;
	fi;
};

# vim:filetype=sh