epubgrep/src/options.cpp

167 lines
5.3 KiB
C++
Raw Normal View History

/* 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 "fs-compat.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/positional_options.hpp>
#include <boost/program_options/value_semantic.hpp>
#include <boost/program_options/variables_map.hpp>
2021-05-24 07:50:50 +02:00
#include <cstdint>
2021-05-20 09:05:39 +02:00
#include <cstdlib>
#include <exception>
2021-05-20 09:05:39 +02:00
#include <fstream>
#include <iostream>
2021-05-20 09:05:39 +02:00
#include <string>
namespace epubgrep::options
{
namespace po = boost::program_options;
using boost::locale::translate;
using std::cout;
po::variables_map parse_options(int argc, char *argv[])
{
po::options_description options_visible(translate("Available options"));
// clang-format off
options_visible.add_options()
2021-05-20 11:51:08 +02:00
("help,h",
translate("Display this help and exit.").str().data())
2021-05-20 11:51:08 +02:00
("version,V",
translate("Display version information and exit.").str().data())
("basic-regexp,G",
translate("PATTERN is a basic regular expression (default).")
.str().data())
2021-05-20 11:51:08 +02:00
("extended-regexp,E",
translate("PATTERN is an extended regular expression.").str().data())
("grep",
translate("Use grep-variation of regular expressions with -G and -E.")
.str().data())
2021-05-20 11:51:08 +02:00
("perl-regexp,P",
translate("PATTERN is a Perl regular expression.").str().data())
2021-05-20 11:51:08 +02:00
("ignore-case,i",
translate("Ignore case distinctions in pattern and data.")
.str().data())
("regexp,e", po::value<std::vector<std::string>>()
->value_name(translate("PATTERN"))->composing()->required(),
translate("Use additional PATTERN for matching.").str().data())
2021-05-24 07:50:50 +02:00
("raw,a",
2021-05-24 16:01:41 +02:00
translate("Do not clean up text before searching.").str().data())
2021-05-24 08:14:29 +02:00
("context,C", po::value<std::uint64_t>()
2021-05-24 08:23:21 +02:00
->value_name(translate("NUMBER"))->default_value(0),
translate("Print NUMBER words of context around matches.")
.str().data())
("nocolor", translate("Do not color matches.") .str().data())
;
po::options_description options_hidden("Hidden options");
options_hidden.add_options()
("input-file", po::value<std::vector<std::string>>()
->value_name("FILE"), "Input file to search.")
;
// clang-format on
po::options_description options_all("Allowed options");
options_all.add(options_visible).add(options_hidden);
po::positional_options_description positional_desc;
2021-05-20 11:43:35 +02:00
positional_desc.add("regexp", 1).add("input-file", -1);
po::variables_map vm;
po::store(po::command_line_parser(argc, argv)
.options(options_all)
.positional(positional_desc)
.run(),
vm);
2021-05-20 09:05:39 +02:00
std::ifstream configfile(get_config_path());
po::store(po::parse_config_file(configfile, options_visible, true), vm);
2021-05-20 09:05:39 +02:00
configfile.close();
try
{
po::notify(vm);
}
catch (const boost::program_options::required_option &e)
{
if (vm.count("help") + vm.count("version") == 0)
{
cout << options_visible;
std::rethrow_exception(std::current_exception());
}
}
if (vm.count("help") != 0)
{
cout << translate("Usage: epubgrep [OPTION]… PATTERN [FILE]…\n");
cout << options_visible;
2021-05-24 06:03:32 +02:00
cout << translate("\nYou can access the full manual "
"with `man epubgrep`.\n");
}
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;
}
2021-05-20 10:20:19 +02:00
fs::path get_config_path()
2021-05-20 09:05:39 +02:00
{
2021-05-21 07:10:46 +02:00
const auto get_env{[](const std::string &name)
{
const char *env = std::getenv(name.c_str());
if (env != nullptr)
{
return env;
}
return "";
}};
2021-05-20 09:05:39 +02:00
2021-05-20 10:20:19 +02:00
fs::path path{get_env("XDG_CONFIG_HOME")};
2021-05-20 09:05:39 +02:00
if (path.empty())
{
path = get_env("HOME");
if (!path.empty())
{
2021-05-20 10:20:19 +02:00
path /= ".config";
2021-05-20 09:05:39 +02:00
}
}
if (!path.empty())
{
2021-05-20 10:20:19 +02:00
return path /= "epubgrep.conf";
2021-05-20 09:05:39 +02:00
}
2021-05-20 10:20:19 +02:00
return "epubgrep.conf";
2021-05-20 09:05:39 +02:00
}
} // namespace epubgrep::options