epubgrep/src/options.cpp

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/* This file is part of epubgrep.
* Copyright © 2021 tastytea <tastytea@tastytea.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "options.hpp"
#include "version.hpp"
#include <boost/locale/message.hpp>
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/variables_map.hpp>
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#include <cstdlib>
#include <fstream>
#include <iostream>
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#include <string>
namespace epubgrep
{
namespace po = boost::program_options;
using boost::locale::translate;
using std::cout;
po::variables_map parse_options(int argc, char *argv[])
{
po::options_description desc(translate("Available options"));
// clang-format off
desc.add_options()
("help",
translate("Display this help and exit").str().data())
("version",
translate("Display version information and exit").str().data())
("extended-regexp",
translate("PATTERNS are extended regular expressions").str().data())
("perl-regexp",
translate("PATTERNS are Perl regular expressions").str().data())
("ignore-case",
translate("Ignore case distinctions in patterns and data")
.str().data())
;
// clang-format on
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, desc), vm);
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std::ifstream configfile(get_config_path());
po::store(po::parse_config_file(configfile, desc, true), vm);
configfile.close();
po::notify(vm);
if (vm.count("help") != 0)
{
cout << translate("Usage: epubgrep [OPTION]… PATTERNS [FILE]…\n");
cout << desc;
}
else if (vm.count("version") != 0)
{
cout << "epubgrep " << epubgrep::version << '\n';
cout << translate(
"Copyright © 2021 tastytea <tastytea@tastytea.de>\n"
"License AGPL-3.0-only <https://gnu.org/licenses/agpl.html>.\n"
"This program comes with ABSOLUTELY NO WARRANTY. This is "
"free software,\n"
"and you are welcome to redistribute it under certain "
"conditions.\n");
}
return vm;
}
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std::string get_config_path()
{
auto get_env = [](std::string const &name)
{
const char *env = std::getenv(name.c_str());
if (env != nullptr)
{
return env;
}
return "";
};
std::string path{get_env("XDG_CONFIG_HOME")};
if (path.empty())
{
path = get_env("HOME");
if (!path.empty())
{
path += "/.config";
}
}
if (!path.empty())
{
path += "/";
}
return path += "epubgrep.conf";
}
} // namespace epubgrep