From c33144552ac033f23fa32f0311e690e232d7bbbc Mon Sep 17 00:00:00 2001
From: Jonas Kulla <Nyocurio@gmail.com>
Date: Fri, 10 Jan 2014 20:16:34 +0100
Subject: [PATCH] Config: Parse from command line options on top of config file

Any options that are not arrays (ie. RTP paths) specified
as command line options will override entries in mkxp.conf.

The syntax is: --<option>=<value>
---
 src/config.cpp | 19 ++++++++++++++-----
 src/config.h   |  2 +-
 src/main.cpp   |  4 ++--
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/src/config.cpp b/src/config.cpp
index c716421..7e3091f 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -52,7 +52,7 @@ Config::Config()
       pathCache(true)
 {}
 
-void Config::read()
+void Config::read(int argc, char *argv[])
 {
 #define PO_DESC_ALL \
 	PO_DESC(debugMode, bool) \
@@ -82,22 +82,31 @@ void Config::read()
 	po::options_description podesc;
 	podesc.add_options()
 	        PO_DESC_ALL
-	        ("RTP", po::value<StringVec>())
+	        ("RTP", po::value<StringVec>()->composing())
 	        ;
 
+	po::variables_map vm;
+
+	/* Parse command line options */
+	po::parsed_options cmdPo =
+	    po::command_line_parser(argc, argv).options(podesc)
+	                                       .allow_unregistered()
+	                                       .run();
+
+	GUARD_ALL( po::store(cmdPo, vm); )
+
+	/* Parse configuration file (mkxp.conf) */
 	std::ifstream confFile;
 	confFile.open("mkxp.conf");
 
-	po::variables_map vm;
-
 	if (confFile)
 	{
 		GUARD_ALL( po::store(po::parse_config_file(confFile, podesc, true), vm); )
-		po::notify(vm);
 	}
 
 	confFile.close();
 
+	po::notify(vm);
 
 #undef PO_DESC
 #define PO_DESC(key, type) GUARD_ALL( key = vm[#key].as< type >(); )
diff --git a/src/config.h b/src/config.h
index 5a7e954..411ce51 100644
--- a/src/config.h
+++ b/src/config.h
@@ -62,7 +62,7 @@ struct Config
 
 	Config();
 
-	void read();
+	void read(int argc, char *argv[]);
 	void readGameINI();
 };
 
diff --git a/src/main.cpp b/src/main.cpp
index 2bf606d..13bd599 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -224,7 +224,7 @@ int rgssThreadFun(void *userdata)
 	return 0;
 }
 
-int main(int, char *argv[])
+int main(int argc, char *argv[])
 {
 	/* initialize SDL first */
 	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0)
@@ -253,7 +253,7 @@ int main(int, char *argv[])
 	/* now we load the config */
 	Config conf;
 
-	conf.read();
+	conf.read(argc, argv);
 	conf.readGameINI();
 
 	int imgFlags = IMG_INIT_PNG | IMG_INIT_JPG;