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