Add dirs migration

CMakeLists.txt

@@ -4,6 +4,9 @@ cmake_minimum_required(VERSION 3.12)
 project(luanti)
 set(PROJECT_NAME_CAPITALIZED "Luanti")
 
+set(LEGACY_PROJECT_NAME "minetest")
+set(LEGACY_PROJECT_NAME_CAPITALIZED "Minetest")
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
 set(GCC_MINIMUM_VERSION "7.5")

src/cmake_config.h.in

@@ -4,6 +4,8 @@
 
 #define PROJECT_NAME "@PROJECT_NAME@"
 #define PROJECT_NAME_C "@PROJECT_NAME_CAPITALIZED@"
+#define LEGACY_PROJECT_NAME "@LEGACY_PROJECT_NAME@"
+#define LEGACY_PROJECT_NAME_C "@LEGACY_PROJECT_NAME_CAPITALIZED@"
 #define VERSION_MAJOR @VERSION_MAJOR@
 #define VERSION_MINOR @VERSION_MINOR@
 #define VERSION_PATCH @VERSION_PATCH@

src/porting.cpp

@@ -457,6 +457,17 @@ bool setSystemPaths()
 	return true;
 }
 
+void migrateLegacyDirs() {
+	char buf[BUFSIZ];
+
+	DWORD len = GetEnvironmentVariable("APPDATA", buf, sizeof(buf));
+	FATAL_ERROR_IF(len == 0 || len > sizeof(buf), "Failed to get APPDATA");
+	std::string legacy_path_user = std::string(buf) + DIR_DELIM LEGACY_PROJECT_NAME_C;
+	std::string new_path_user = std::string(buf) + DIR_DELIM PROJECT_NAME_C;
+
+	if (fs::PathExists(legacy_path_user))
+		fs::MoveDir(legacy_path_user, new_path_user);
+}
 
 //// Android
 
@@ -525,6 +536,21 @@ bool setSystemPaths()
 	return true;
 }
 
+void migrateLegacyDirs() {
+	const char *const xdg_data = getenv("XDG_DATA_HOME");
+	std::string legacy_path_user;
+	std::string new_path_user;
+
+	legacy_path_user = std::string(getHomeOrFail()) + DIR_DELIM "." LEGACY_PROJECT_NAME;
+	if (xdg_data) {
+		new_path_user = std::string(xdg_data);
+	} else {
+		new_path_user = std::string(getHomeOrFail()) + DIR_DELIM ".local" DIR_DELIM "share" DIR_DELIM PROJECT_NAME;
+	}
+
+	if (fs::PathExists(legacy_path_user))
+		fs::MoveDir(legacy_path_user, new_path_user);
+}
 
 //// Mac OS X
 #elif defined(__APPLE__)
@@ -553,6 +579,18 @@ bool setSystemPaths()
 	return true;
 }
 
+void migrateLegacyDirs() {
+	std::string legacy_path_user = std::string(getHomeOrFail())
+			+ "/Library/Application Support/"
+			LEGACY_PROJECT_NAME;
+
+	std::string new_path_user = std::string(getHomeOrFail())
+			+ "/Library/Application Support/"
+			PROJECT_NAME;
+
+	if (fs::PathExists(legacy_path_user))
+		fs::MoveDir(legacy_path_user, new_path_user);
+}
 
 #else
 
@@ -568,6 +606,15 @@ bool setSystemPaths()
 	return true;
 }
 
+void migrateLegacyDirs() {
+	std::string legacy_path_user = std::string(getHomeOrFail()) + DIR_DELIM "." LEGACY_PROJECT_NAME;
+
+	std::string new_path_user = std::string(getHomeOrFail()) + DIR_DELIM "." PROJECT_NAME;
+
+	if (fs::PathExists(legacy_path_user))
+		fs::MoveDir(legacy_path_user, new_path_user);
+}
+
 
 #endif
 
@@ -682,6 +729,8 @@ void initializePaths()
 	// Migrate cache folder to new location if possible
 	migrateCachePath();
 
+	migrateLegacyDirs();
+
 #endif // RUN_IN_PLACE
 
 	assert(!path_share.empty());

src/porting.h

@@ -119,6 +119,8 @@ std::string getDataPath(const char *subpath);
 */
 void initializePaths();
 
+void migrateLegacyDirs();
+
 /*
 	Return system information
 	e.g. "Linux/3.12.7 x86_64"