#

# . ./build.vars and set -o errexit -o noglob are assumed.

# See warning at the top of build.vars.

#

# N.B.	URLs ($1) may contain `?' or '&' characters.

pkgp_fetch() {

	_f_url="${1}"; _f_sha256sum_src="${2}";

	if [ -z "${3}" ]; then

		_f_url_dst="${DLCACHEDIR}/$(basename "${_f_url}")";

	else

		_f_url_dst="${DLCACHEDIR}/${3}";

	fi;

	if [ ${ARG_OFFLINE:-0} -eq 1 ]\

	|| [ -e ${_f_url_dst}.fetched ]; then

		unset _f_url _f_sha256sum_src _f_url_dst;

		return 0;

	else

		wget ${WGET_ARGS} -c -O ${_f_url_dst} "${_f_url}";

	fi;

	if [ -n "${_f_sha256sum_src}" ]; then

		set -- $(openssl dgst -sha256 ${_f_url_dst}); shift $((${#}-1));

		if [ "${_f_sha256sum_dst:=${1}}" != "${_f_sha256sum_src}" ]; then

			if [ ${ARG_IGNORE_SHA256SUMS:-0} -eq 0 ]; then

				log_msg failexit "Error: hash mismatch for URL \`${_f_url}' (is: ${_f_sha256sum_dst}, should be: ${_f_sha256sum_src}.)";

			else

				log_msg warn "Warning: hash mismatch for URL \`${_f_url}' (is: ${_f_sha256sum_dst}, should be: ${_f_sha256sum_src}.)";

			fi;

		fi;

	fi;

	touch ${_f_url_dst}.fetched;

	unset _f_url _f_url_dst _f_sha256sum_src _f_sha256sum_dst;

};

pkgp_fetch_git() {

	_fg_subdir="${1}"; _fg_url="${2}"; _fg_branch="${3}";

	if [ ${ARG_OFFLINE:-0} -eq 0 ]; then

		if [ -e "${DLCACHEDIR}/${_fg_subdir}" ]; then

			build_fileop cd ${DLCACHEDIR}/${_fg_subdir} &&\

				git pull origin ${_fg_branch:-main} &&\

					build_fileop cd ${OLDPWD};

		else

			git clone ${_fg_url} ${DLCACHEDIR}/${_fg_subdir};

			if [ -n "${_fg_branch}" -a		\

			     \( -z "${_fg_branch#main}" \) -a	\

			     \( -z "${_fg_branch#master}" \) ]; then

				build_fileop cd ${DLCACHEDIR}/${_fg_subdir}	&&\

					git checkout -b ${_fg_branch}		&&\	

						build_fileop cd ${OLDPWD};

			fi;

		fi;

	fi;

	build_fileop rm ${_fg_subdir};

	build_fileop cp ${DLCACHEDIR}/${_fg_subdir} .;

};

pkgp_fetch_urls_git() {

	for _ppfu_url_spec in "${@}"; do

		_ppfu_subdir=${_ppfu_url_spec%=*};

		_ppfu_url=${_ppfu_url_spec#*=};

		_ppfu_url=${_ppfu_url%@*};

		if [ "${_ppfu_url_spec#*@}" != "${_ppfu_url_spec}" ]; then

			_ppfu_git_branch=${_ppfu_url_spec#*@};

		fi;

		pkgp_fetch_git ${_ppfu_subdir} ${_ppfu_url} ${_ppfu_git_branch};

	done;

	unset _ppfu_url_spec _ppfu_subdir _ppfu_url _ppfu_git_branch;

};

pkg_fetch() {

	if [ -n "${1}" ]; then

		if [ "${1}" = "-git" ]; then

			shift; pkgp_fetch_urls_git ${1};

		else

			pkgp_fetch ${1} ${2};

		fi;

	else

		if [ -n "${PKG_URL}" ]; then

			pkgp_fetch ${PKG_URL} ${PKG_SHA256SUM} ${PKG_FNAME};

		fi;

		if [ -n "${PKG_URLS_GIT}" ]; then

			pkgp_fetch_urls_git ${PKG_URLS_GIT};

		fi;

		set_build_script_done fetch -extract;

	fi;

};

# vim:filetype=sh