New command line parameter to change where TE4 stores data: --home /foor/bar

git-svn-id: http://svn.net-core.org/repos/t-engine4@6491 51575b47-30f0-44d4-a5cc-537603b46e54

src/main.c

@@ -52,7 +52,7 @@
 #define DEFAULT_IDLE_FPS (2)
 
 int start_xpos = -1, start_ypos = -1;
-
+char *override_home = NULL;
 int g_argc = 0;
 char **g_argv;
 SDL_Window *window = NULL;
@@ -1129,6 +1129,7 @@ int main(int argc, char *argv[])
 		if (!strncmp(arg, "--xpos", 6)) start_xpos = strtol(argv[++i], NULL, 10);
 		if (!strncmp(arg, "--ypos", 6)) start_ypos = strtol(argv[++i], NULL, 10);
 		if (!strncmp(arg, "--safe-mode", 11)) safe_mode = TRUE;
+		if (!strncmp(arg, "--home", 6)) override_home = strdup(argv[++i]);
 	}
 
 	// Initialize display lock for thread safety.

src/main.h

@@ -44,6 +44,7 @@ extern bool multitexture_active;
 extern long total_keyframes;
 extern int g_argc;
 extern char **g_argv;
+extern char *override_home;
 
 /* Error handling */
 struct lua_err_type_s {

src/physfs.c

@@ -350,7 +350,10 @@ static int lua_fs_get_home_path(lua_State *L)
 
 static int lua_fs_get_user_path(lua_State *L)
 {
-	lua_pushstring(L, PHYSFS_getUserDir());
+	if (override_home)
+		lua_pushstring(L, override_home);
+	else
+		lua_pushstring(L, PHYSFS_getUserDir());
 	return 1;
 }