Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
#
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# set +o errexit -o noglob -o nounset is assumed.
Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
#
Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
# N.B.	URLs ($1) may contain `?' or '&' characters.
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rtl_fetch_url_wget() {
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	local _urls="${1}" _sha256sum_src="${2}" _target_dname="${3}" _target_fname="${4}" _target_name="${5}" _mirrors="${6:-}"\
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		_rc=0 _sha256sum_target="" _target_fname_full="" _url="" _url_base="" _urls_count=0 _urls_full="";
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	_urls_full="${_urls}";
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	for _url_base in ${_mirrors}; do
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		_urls_full="$(rtl_lconcat "${_urls_full}" "${_url_base%/}/${_target_name}/${_target_fname}")";
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	done;
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	_urls_count="$(rtl_llength "${_urls_full}")";
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	for _url in ${_urls_full}; do
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		if [ -z "${_target_fname}" ]; then
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			_target_fname="$(rtl_basename "${_url}")";
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		fi;
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		_target_fname_full="${_target_dname}/${_target_fname}";
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		(set +o errexit -o noglob -o nounset;
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		rtl_flock_acquire 4 || exit 1;
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		trap "_rc=\"\${?}\"; rm -f \"${_target_fname_full}.fetching\"; exit \"\${_rc}\";" EXIT;
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		if [ -z "${_sha256sum_src}" ]\
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		|| ! rtl_check_digest_file "${_target_fname_full}" "${_sha256sum_src}" "${_target_fname_full}.fetched"; then
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			wget ${DEFAULT_WGET_ARGS} -O "${_target_fname_full}" "${_url}"; _rc="${?}";
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			if [ "${_rc}" -ne 0 ]; then
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				exit $((${_rc}+2));
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			elif [ -n "${_sha256sum_src}" ]\
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			&& ! rtl_check_digest "${_target_fname_full}" "${_sha256sum_src}"; then
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				exit 2;
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			else
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				printf "%s" "${RTL_CHECK_DIGEST_DIGEST}" > "${_target_fname_full}.fetched"; exit 0;
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			fi;
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		else
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			exit 0;
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		fi;) 4<>"${_target_fname_full}.fetching"; _rc="${?}"; : $((_urls_count-=1));
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		case "${_rc}" in
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		0)	break; ;;
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		1)	if [ "${_urls_count}" -ge 1 ]; then
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				rtl_log_msg warning "Warning: failed to acquire fetching lock for URL \`%s', retrying with alternative URL..." "${_url}";
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			else
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				rtl_log_msg fatal "Error: failed to acquire fetching lock for URL \`%s'." "${_url}";
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				rtl_fileop rm "${_target_fname_full}"; break;
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			fi; ;;
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		2)	if [ "${_urls_count}" -ge 1 ]; then
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				rtl_log_msg warning "Warning: hash mismatch for URL \`%s', retrying with alternative URL... (from build variables: %s.)"\
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						"${_url}" "${_sha256sum_src}";
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			else
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				if _sha256sum_target="$(sha256sum "${_target_fname_full}" |\
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							awk '{print $1}' 2>/dev/null)"; then
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					rtl_log_msg fatal "Error: hash mismatch for URL \`%s' (should be: %s vs.: %s.)"\
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							"${_url}" "${_sha256sum_src}" "${_sha256sum_target}";
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				else
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					rtl_log_msg fatal "Error: hash mismatch for URL \`%s' (should be: %s.)"\
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							"${_url}" "${_sha256sum_src}";
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				fi;
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				rtl_fileop rm "${_target_fname_full}"; break;
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			fi; ;;
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		*)	if [ "${_urls_count}" -ge 1 ]; then
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				rtl_log_msg warning "Warning: failed to fetch URL \`%s', retrying with alternative URL... (wget(1) exit status: %s)"\
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						"${_url}" "$((${_rc}-2))";
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			else
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				rtl_log_msg fatal "Error: failed to fetch URL \`%s' (wget(1) exit status: %s)"\
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						"${_url}" "$((${_rc}-2))";
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				rtl_fileop rm "${_target_fname_full}"; break;
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			fi; ;;
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		esac;
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	done;
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	return "${_rc}";
Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
};
Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
Lucio Andrés Illanes Albornoz (arab, vxp) ec19f0
# vim:filetype=sh