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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* Functions to parse the "SOURCE_DATE_EPOCH" environment variable for reproducible build hacks, see
* https://reproducible-builds.org/docs/source-date-epoch/
*//*
* Authors:
* Patrick Storz <eduard.braun2@gmx.de>
*
* Copyright (C) 2019 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_SOURCE_DATE_EPOCH
#define SEEN_SOURCE_DATE_EPOCH
#include <sstream>
#include <iostream>
#include <cstdlib>
#include <ctime>
namespace ReproducibleBuilds {
/** parse current time from SOURCE_DATE_EPOCH environment variable
*
* \return current time (or zero if SOURCE_DATE_EPOCH unset)
*/
time_t now()
{
time_t now = 0;
char *source_date_epoch = std::getenv("SOURCE_DATE_EPOCH");
if (source_date_epoch) {
std::istringstream iss(source_date_epoch);
iss >> now;
if (iss.fail() || !iss.eof()) {
std::cerr << "Error: Cannot parse SOURCE_DATE_EPOCH as integer\n";
exit(27);
}
}
return now;
}
/** like ReproducibleBuilds::now() but returns a ISO 8601 formatted string
*
* \return current time as ISO 8601 formatted string (or empty string if SOURCE_DATE_EPOCH unset)
*/
Glib::ustring now_iso_8601()
{
Glib::ustring now_formatted;
time_t now = ReproducibleBuilds::now();
if (now) {
const tm *now_struct;
char buffer[25];
now_struct = gmtime(&now);
if (strftime(buffer, 25, "%Y-%m-%dT%H:%M:%S", now_struct)) {
now_formatted = buffer;
}
}
return now_formatted;
}
} // namespace ReproducibleBuilds
#endif // SEEN_SOURCE_DATE_EPOCH
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