Allow passing set name and search path as command line parameters.

src/commandline.cpp

@@ -0,0 +1,97 @@
+/* Copyright 2015, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * "dindexer" 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "commandline.hpp"
+#include "dindexerConfig.h"
+#include <boost/program_options.hpp>
+#include <iostream>
+
+#define STRINGIZE_IMPL(s) #s
+#define STRINGIZE(s) STRINGIZE_IMPL(s)
+
+namespace po = boost::program_options;
+
+namespace din {
+	namespace {
+		const char* const g_version_string =
+			PROGRAM_NAME " v"
+			STRINGIZE(VERSION_MAJOR) "."
+			STRINGIZE(VERSION_MINOR) "."
+			STRINGIZE(VERSION_PATCH)
+#if VERSION_BETA
+			"b"
+#endif
+			;
+	} //unnamed namespace
+
+	bool parse_commandline (int parArgc, char* parArgv[], po::variables_map& parVarMap) {
+		po::options_description desc("General");
+		desc.add_options()
+			("help,h", "Produces this help message")
+			("version", "Prints the program's version and quits")
+			//("dump-raw,D", po::value<std::string>(), "Saves the retrieved html to the named file; use - for stdout")
+		;
+		po::options_description set_options("Set options");
+		set_options.add_options()
+			("setname,n", po::value<std::string>()->default_value("New set"), "Name to be given to the new set being scanned.")
+		;
+		po::options_description positional_options("Positional options");
+		positional_options.add_options()
+			("search-path", po::value<std::string>(), "Search path")
+		;
+		po::options_description all("Available options");
+		all.add(desc).add(positional_options).add(set_options);
+		po::positional_options_description pd;
+		pd.add("search-path", 1);//.add("xpath", 1);
+		try {
+			po::store(po::command_line_parser(parArgc, parArgv).options(all).positional(pd).run(), parVarMap);
+		}
+		catch (const po::unknown_option& err) {
+			throw std::invalid_argument(err.what());
+		}
+
+		po::notify(parVarMap);
+
+		if (parVarMap.count("help")) {
+#if !defined(NDEBUG)
+			std::cout << "*******************\n";
+			std::cout << "*** DEBUG BUILD ***\n";
+			std::cout << "*******************\n";
+			std::cout << '\n';
+#endif
+			po::options_description visible("Available options");
+			visible.add(desc).add(set_options);
+			std::cout << PROGRAM_NAME << " Copyright (C) 2015  Michele Santullo\n";
+			std::cout << "This program comes with ABSOLUTELY NO WARRANTY.\n"; //for details type `show w'.
+			std::cout << "This is free software, and you are welcome to\n";
+			std::cout << "redistribute it under certain conditions.\n"; //type `show c' for details.
+			std::cout << '\n';
+			std::cout << "Usage: " << PROGRAM_NAME << " [options...] <search-path>\n";
+			std::cout << visible;
+			return true;
+		}
+		else if (parVarMap.count("version")) {
+			std::cout << g_version_string << '\n';
+			return true;
+		}
+
+		if (parVarMap.count("search-path") == 0) {
+			throw std::invalid_argument("No search path specified");
+		}
+		return false;
+	}
+} //namespace din