configuration: add 'ignore-config-errors' switch

NEWS

@@ -3,6 +3,7 @@ ncmpcpp-0.6.4 (2015-05-02)
 * Fix title of a pop-up which shows during adding selected items to the current playlist.
 * Correctly deal with leading separator while parsing filenames in tag editor.
 * Fix initial incorrect window size that was occuring in some cases.
+* Unknown and invalid configuration options can now be ignored using command line option 'ignore-config-errors'.
 
 ncmpcpp-0.6.3 (2015-03-02)
 

src/configuration.cpp

@@ -54,6 +54,7 @@ bool configure(int argc, char **argv)
 		("host,h", po::value<std::string>()->default_value("localhost"), "connect to server at host")
 		("port,p", po::value<int>()->default_value(6600), "connect to server at port")
 		("config,c", po::value<std::string>(&config_path)->default_value("~/.ncmpcpp/config"), "specify configuration file")
+		("ignore-config-errors", po::value<bool>()->default_value(false), "ignore unknown and invalid options in configuration file")
 		("bindings,b", po::value<std::string>(&bindings_path)->default_value("~/.ncmpcpp/bindings"), "specify bindings file")
 		("screen,s", po::value<std::string>(), "specify initial screen")
 		("help,?", "show help message")
@@ -130,7 +131,7 @@ bool configure(int argc, char **argv)
 
 		// read configuration
 		expand_home(config_path);
-		if (Config.read(config_path) == false)
+		if (Config.read(config_path, vm["ignore-config-errors"].as<bool>()) == false)
 			exit(1);
 
 		// if bindings file was not specified, use the one from main directory.

src/settings.cpp

@@ -179,7 +179,7 @@ option_parser::worker buffer(NC::Buffer &arg, ValueT &&value, TransformT &&map)
 
 }
 
-bool Configuration::read(const std::string &config_path)
+bool Configuration::read(const std::string &config_path, bool ignore_errors)
 {
 	std::string mpd_host;
 	unsigned mpd_port;
@@ -640,5 +640,5 @@ bool Configuration::read(const std::string &config_path)
 	));
 
 	std::ifstream f(config_path);
-	return p.run(f);
+	return p.run(f, ignore_errors);
 }

src/settings.h

@@ -51,7 +51,7 @@ struct Configuration
 	: playlist_disable_highlight_delay(0), visualizer_sync_interval(0)
 	{ }
 	
-	bool read(const std::string &config_path);
+	bool read(const std::string &config_path, bool ignore_errors);
 	
 	std::string ncmpcpp_directory;
 	std::string lyrics_directory;

src/utility/option_parser.cpp

@@ -35,7 +35,7 @@
 
 #include "utility/option_parser.h"
 
-bool option_parser::run(std::istream &is)
+bool option_parser::run(std::istream &is, bool ignore_errors)
 {
 	// quoted value. leftmost and rightmost quotation marks are the delimiters.
 	boost::regex quoted("(\\w+)\\h*=\\h*\"(.*)\"[^\"]*");
@@ -56,13 +56,15 @@ bool option_parser::run(std::istream &is)
 					it->second.parse(match[2]);
 				} catch (std::exception &e) {
 					std::cerr << "Error while processing option \"" << option << "\": " << e.what() << "\n";
-					return false;
+					if (!ignore_errors)
+						return false;
 				}
 			}
 			else
 			{
 				std::cerr << "Unknown option: " << option << "\n";
-				return false;
+				if (!ignore_errors)
+					return false;
 			}
 		}
 	}
@@ -74,7 +76,8 @@ bool option_parser::run(std::istream &is)
 				p.second.run_default();
 			} catch (std::exception &e) {
 				std::cerr << "Error while finalizing option \"" << p.first << "\": " << e.what() << "\n";
-				return false;
+				if (ignore_errors)
+					return false;
 			}
 		}
 	}

src/utility/option_parser.h

@@ -129,7 +129,7 @@ struct option_parser
 		m_parsers[option] = std::forward<WorkerT>(w);
 	}
 
-	bool run(std::istream &is);
+	bool run(std::istream &is, bool ignore_errors);
 
 private:
 	std::unordered_map<std::string, worker> m_parsers;