Let user specify the data dir as cmdline option.

This adds --openrct-data-dir=<str> option to command line letting user
select where he wants OpenRCT2-specific data to be. By default the
search locations are:
* <exePath>/data (on all platforms)
* /var/lib/openrct2 (on Linux)
* /usr/share/openrct2 (on Linux)

src/cmdline.c

@@ -76,6 +76,7 @@ int cmdline_run(const char **argv, int argc)
 	int version = 0, headless = 0, verbose = 0, width = 0, height = 0, port = 0;
 	char *server = NULL;
 	char *userDataPath = NULL;
+	char *openrctDataPath = NULL;
 
 	argparse_option_t options[] = {
 		OPT_HELP(),
@@ -84,8 +85,9 @@ int cmdline_run(const char **argv, int argc)
 		OPT_BOOLEAN(0, "verbose", &verbose, "log verbose messages"),
 		OPT_INTEGER('m', "mode", &sprite_mode, "the type of sprite conversion. 0 = default, 1 = simple closest pixel match, 2 = dithering"),
 		OPT_STRING(0, "server", &server, "server to connect to"),
-		OPT_INTEGER(0, "port", &port, "port"),
+		OPT_INTEGER(0, "port", &port, "Port to use. If used with --server, it will connect to specified server at this port, otherwise it will start the server"),
 		OPT_STRING(0, "user-data-path", &userDataPath, "path to the user data directory (containing config.ini)"),
+		OPT_STRING(0, "openrct-data-path", &openrctDataPath, "path to the OpenRCT2 data directory (containing languages)"),
 		OPT_END()
 	};
 
@@ -117,6 +119,10 @@ int cmdline_run(const char **argv, int argc)
 		safe_strncpy(gCustomUserDataPath, userDataPath, sizeof(gCustomUserDataPath));
 	}
 
+	if (openrctDataPath != NULL) {
+		safe_strncpy(gCustomOpenrctDataPath, openrctDataPath, sizeof(gCustomOpenrctDataPath));
+	}
+
 #ifndef DISABLE_NETWORK
 	if (port != 0) {
 		gNetworkStart = NETWORK_MODE_SERVER;

src/config.c

@@ -1359,6 +1359,7 @@ static void title_sequence_open(const char *path, const char *customName);
 void title_sequences_set_default()
 {
 	char path[MAX_PATH];
+	char dataPath[MAX_PATH];
 	char sep = platform_get_path_separator();
 
 	platform_get_user_directory(path, "title sequences");
@@ -1367,12 +1368,14 @@ void title_sequences_set_default()
 	gConfigTitleSequences.presets = malloc(0);
 	gConfigTitleSequences.num_presets = 0;
 
+	platform_get_openrct_data_path(dataPath);
+
 	// Load OpenRCT2 title sequence
-	sprintf(path, "%s%c%s%c%s%c%s%c", gExePath, sep, "data", sep, "title", sep, "rct2", sep);
+	sprintf(path, "%s%c%s%c%s%c", dataPath, sep, "title", sep, "rct2", sep);
 	title_sequence_open(path, language_get_string(5308));
 
 	// Load OpenRCT2 title sequence
-	sprintf(path, "%s%c%s%c%s%c%s%c", gExePath, sep, "data", sep, "title", sep, "openrct2", sep);
+	sprintf(path, "%s%c%s%c%s%c", dataPath, sep, "title", sep, "openrct2", sep);
 	title_sequence_open(path, language_get_string(5309));
 }
 

src/drawing/sprite.c

@@ -82,7 +82,10 @@ int gfx_load_g2()
 	unsigned int i;
 
 	char path[MAX_PATH];
-	sprintf(path, "%s%cdata%cg2.dat", gExePath, platform_get_path_separator(), platform_get_path_separator());
+	char dataPath[MAX_PATH];
+
+	platform_get_openrct_data_path(dataPath);
+	sprintf(path, "%s%cg2.dat", dataPath, platform_get_path_separator());
 	file = SDL_RWFromFile(path, "rb");
 	if (file != NULL) {
 		if (SDL_RWread(file, &g2.header, 8, 1) == 1) {

src/localisation/language.cpp

@@ -146,19 +146,21 @@ const char *language_get_string(rct_string_id id)
 
 int language_open(int id)
 {
-	static const char *languagePath = "%s/data/language/%s.txt";
+	static const char *languagePath = "%s/language/%s.txt";
 	char filename[MAX_PATH];
+	char dataPath[MAX_PATH];
 
 	language_close_all();
 	if (id == LANGUAGE_UNDEFINED)
 		return 1;
 
+	platform_get_openrct_data_path(dataPath);
 	if (id != LANGUAGE_ENGLISH_UK) {
-		sprintf(filename, languagePath, gExePath, LanguagesDescriptors[LANGUAGE_ENGLISH_UK].path);
+		sprintf(filename, languagePath, dataPath, LanguagesDescriptors[LANGUAGE_ENGLISH_UK].path);
 		_languageFallback = LanguagePack::FromFile(LANGUAGE_ENGLISH_UK, filename);
 	}
 
-	sprintf(filename, languagePath, gExePath, LanguagesDescriptors[id].path);
+	sprintf(filename, languagePath, dataPath, LanguagesDescriptors[id].path);
 	_languageCurrent = LanguagePack::FromFile(id, filename);
 	if (_languageCurrent != nullptr) {
 		gCurrentLanguage = id;

src/openrct2.c

@@ -53,6 +53,7 @@ int gOpenRCT2StartupAction = STARTUP_ACTION_TITLE;
 utf8 gOpenRCT2StartupActionPath[512] = { 0 };
 utf8 gExePath[MAX_PATH];
 utf8 gCustomUserDataPath[MAX_PATH] = { 0 };
+utf8 gCustomOpenrctDataPath[MAX_PATH] = { 0 };
 
 // This should probably be changed later and allow a custom selection of things to initialise like SDL_INIT
 bool gOpenRCT2Headless = false;
@@ -148,7 +149,6 @@ static void openrct2_copy_files_over(const utf8 *originalDirectory, const utf8 *
 	platform_enumerate_directories_end(fileEnumHandle);
 }
 
-// TODO move to platform
 static void openrct2_set_exe_path()
 {
 	platform_get_exe_path(gExePath);
@@ -173,6 +173,7 @@ bool openrct2_initialise()
 {
 	utf8 userPath[MAX_PATH];
 
+	platform_resolve_openrct_data_path();
 	platform_resolve_user_data_path();
 	platform_get_user_directory(userPath, NULL);
 	if (!platform_ensure_directory_exists(userPath)) {

src/openrct2.h

@@ -34,6 +34,7 @@ extern int gOpenRCT2StartupAction;
 extern utf8 gOpenRCT2StartupActionPath[512];
 extern utf8 gExePath[MAX_PATH];
 extern utf8 gCustomUserDataPath[MAX_PATH];
+extern utf8 gCustomOpenrctDataPath[MAX_PATH];
 extern bool gOpenRCT2Headless;
 extern bool gOpenRCT2ShowChangelog;
 

src/platform/platform.h

@@ -147,6 +147,8 @@ void platform_get_cursor_position(int *x, int *y);
 void platform_set_cursor_position(int x, int y);
 unsigned int platform_get_ticks();
 void platform_resolve_user_data_path();
+void platform_resolve_openrct_data_path();
+void platform_get_openrct_data_path(utf8 *outPath);
 void platform_get_user_directory(utf8 *outPath, const utf8 *subDirectory);
 void platform_show_messagebox(utf8 *message);
 int platform_open_common_file_dialog(int type, utf8 *title, utf8 *filename, utf8 *filterPattern, utf8 *filterName);

src/platform/posix.c

@@ -42,6 +42,7 @@
 #define SINGLE_INSTANCE_MUTEX_NAME "RollerCoaster Tycoon 2_GSKMUTEX"
 
 utf8 _userDataDirectoryPath[MAX_PATH] = { 0 };
+utf8 _openrctDataDirectoryPath[MAX_PATH] = { 0 };
 
 /**
  * The function that is called directly from the host application (rct2.exe)'s WinMain. This will be removed when OpenRCT2 can
@@ -568,6 +569,54 @@ void platform_resolve_user_data_path()
 	free(path);
 }
 
+void platform_get_openrct_data_path(utf8 *outPath)
+{
+	safe_strncpy(outPath, _openrctDataDirectoryPath, sizeof(_openrctDataDirectoryPath));
+}
+
+/**
+ * Default directory fallback is:
+ *   - (command line argument)
+ *   - <platform dependent>
+ */
+void platform_resolve_openrct_data_path()
+{
+	const char separator[2] = { platform_get_path_separator(), 0 };
+
+	if (gCustomOpenrctDataPath[0] != 0) {
+		realpath(gCustomOpenrctDataPath, _openrctDataDirectoryPath);
+
+		// Ensure path ends with separator
+		int len = strlen(_openrctDataDirectoryPath);
+		if (_openrctDataDirectoryPath[len - 1] != separator[0]) {
+			strncat(_openrctDataDirectoryPath, separator, MAX_PATH - 1);
+		}
+		return;
+	}
+
+	char buffer[MAX_PATH] = { 0 };
+	platform_get_exe_path(buffer);
+
+	strncat(buffer, separator, MAX_PATH - strnlen(buffer, MAX_PATH) - 1);
+	strncat(buffer, "data", MAX_PATH - strnlen(buffer, MAX_PATH) - 1);
+	const utf8 *searchLocations[] = {
+		buffer,
+#ifdef __linux__
+		"/var/lib/openrct2",
+		"/usr/share/openrct2",
+#endif // __linux__
+	};
+	for (size_t i = 0; i < countof(searchLocations); i++)
+	{
+		if (platform_directory_exists(searchLocations[i]))
+		{
+			_openrctDataDirectoryPath[0] = '\0';
+			safe_strncpy(_openrctDataDirectoryPath, searchLocations[i], sizeof(_openrctDataDirectoryPath));
+			return;
+		}
+	}
+}
+
 void platform_get_user_directory(utf8 *outPath, const utf8 *subDirectory)
 {
 	const char separator[2] = { platform_get_path_separator(), 0 };

src/platform/windows.c

@@ -38,6 +38,7 @@
 #define SINGLE_INSTANCE_MUTEX_NAME "RollerCoaster Tycoon 2_GSKMUTEX"
 
 utf8 _userDataDirectoryPath[MAX_PATH] = { 0 };
+utf8 _openrctDataDirectoryPath[MAX_PATH] = { 0 };
 
 utf8 **windows_get_command_line_args(int *outNumArgs);
 
@@ -407,6 +408,51 @@ bool platform_file_delete(const utf8 *path)
 	return success == TRUE;
 }
 
+void platform_resolve_openrct_data_path()
+{
+	wchar_t wOutPath[MAX_PATH];
+	const char separator[2] = { platform_get_path_separator(), 0 };
+
+	if (gCustomOpenrctDataPath[0] != 0) {
+		wchar_t *customUserDataPathW = utf8_to_widechar(gCustomOpenrctDataPath);
+		if (GetFullPathNameW(customUserDataPathW, countof(wOutPath), wOutPath, NULL) == 0) {
+			log_fatal("Unable to resolve path '%s'.", gCustomOpenrctDataPath);
+			exit(-1);
+		}
+		utf8 *outPathTemp = widechar_to_utf8(wOutPath);
+		safe_strncpy(_userDataDirectoryPath, outPathTemp, sizeof(_userDataDirectoryPath));
+		free(outPathTemp);
+		free(customUserDataPathW);
+
+		// Ensure path ends with separator
+		int len = strlen(_userDataDirectoryPath);
+		if (_userDataDirectoryPath[len - 1] != separator[0]) {
+			strcat(_userDataDirectoryPath, separator);
+		}
+		return;
+	}
+	char buffer[MAX_PATH] = { 0 };
+	platform_get_exe_path(buffer);
+
+	strncat(buffer, separator, MAX_PATH - strnlen(buffer, MAX_PATH) - 1);
+	strncat(buffer, "data", MAX_PATH - strnlen(buffer, MAX_PATH) - 1);
+
+	if (platform_directory_exists(buffer))
+	{
+		_openrctDataDirectoryPath[0] = '\0';
+		safe_strncpy(_openrctDataDirectoryPath, buffer, sizeof(_openrctDataDirectoryPath));
+		return;
+	} else {
+		log_fatal("Unable to resolve openrct data path.");
+		exit(-1);
+	}
+}
+
+void platform_get_openrct_data_path(utf8 *outPath)
+{
+	safe_strncpy(outPath, _openrctDataDirectoryPath, sizeof(_openrctDataDirectoryPath));
+}
+
 /**
  * Default directory fallback is:
  *   - (command line argument)

src/title.c

@@ -602,9 +602,11 @@ static uint8 *title_script_load()
 	char parts[3 * 128], *token, *part1, *part2, *src;
 
 	utf8 path[MAX_PATH];
-	utf8 filePath[] = "data/title/script.txt";
+	utf8 dataPath[MAX_PATH];
+	utf8 filePath[] = "title/script.txt";
 
-	sprintf(path, "%s%c%s", gExePath, platform_get_path_separator(), filePath);
+	platform_get_openrct_data_path(dataPath);
+	sprintf(path, "%s%c%s", dataPath, platform_get_path_separator(), filePath);
 	log_verbose("loading title script, %s", path);
 	file = SDL_RWFromFile(path, "r");
 	if (file == NULL) {