From a0919bf3451267337d2b2696e4c38fb68cc7a229 Mon Sep 17 00:00:00 2001
From: Kp <kp@valhallalegends.com>
Date: Sun, 11 Oct 2015 22:21:00 +0000
Subject: [PATCH] Add support for -add-missions-dir

---
 common/include/args.h | 1 +
 similar/misc/args.cpp | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/common/include/args.h b/common/include/args.h
index e536add38..be89d3f14 100644
--- a/common/include/args.h
+++ b/common/include/args.h
@@ -75,6 +75,7 @@ struct Arg : prohibit_void_ptr<Arg>
 {
 	int SysMaxFPS;
 	std::string SysHogDir;
+	std::string SysMissionDir;
 	std::string SysPilot;
 	std::string SysRecordDemoNameTemplate;
 	bool SysShowCmdHelp;
diff --git a/similar/misc/args.cpp b/similar/misc/args.cpp
index 205635dde..c75b3fcf4 100644
--- a/similar/misc/args.cpp
+++ b/similar/misc/args.cpp
@@ -200,6 +200,10 @@ static void ReadCmdArgs(Inilist &ini, Arglist &Args)
 			GameArg.SysMaxFPS = arg_integer(pp, end);
 		else if (!d_stricmp(p, "-hogdir"))
 			GameArg.SysHogDir = arg_string(pp, end);
+#if PHYSFS_VER_MAJOR >= 2
+		else if (!d_stricmp(p, "-add-missions-dir"))
+			GameArg.SysMissionDir = arg_string(pp, end);
+#endif
 		else if (!d_stricmp(p, "-nohogdir"))
 		{
 			/* No effect on non-Unix.  Ignore it so that players can
@@ -395,6 +399,10 @@ static void PostProcessGameArg()
 		GameArg.SysMaxFPS = MINIMUM_FPS;
 	else if (GameArg.SysMaxFPS > MAXIMUM_FPS)
 		GameArg.SysMaxFPS = MAXIMUM_FPS;
+#if PHYSFS_VER_MAJOR >= 2
+	if (!GameArg.SysMissionDir.empty())
+		PHYSFS_mount(GameArg.SysMissionDir.c_str(), MISSION_DIR, 1);
+#endif
 
 	static char sdl_disable_lock_keys[] = "SDL_DISABLE_LOCK_KEYS=0";
 	if (CGameArg.CtlNoStickyKeys) // Must happen before SDL_Init!