do not migrate legacy homepath when using -homepath arg

src/common/FileSystem.cpp

@@ -2067,18 +2067,33 @@ std::string DefaultHomePath()
 #ifdef __APPLE__
 	return std::string(home) + "/Library/Application Support/" PRODUCT_NAME;
 #else
-	struct stat stl, stx;
-
-	std::string legacyHomePath = Path::Build(std::string(home), "." PRODUCT_NAME_LOWER);
 	const char* _xdgDataHome = getenv("XDG_DATA_HOME");
-	std::string xdgDataHome = _xdgDataHome == NULL ? "" : std::string(_xdgDataHome);
+	std::string xdgDataHome = _xdgDataHome == NULL ? Path::Build(Path::Build(std::string(home), ".local") ,"share") : std::string(_xdgDataHome);
 	std::string xdgHomePath;
 
-	if (xdgDataHome.empty()) {
-		xdgDataHome = Path::Build(Path::Build(std::string(home), ".local") ,"share");
+	xdgHomePath = Path::Build(xdgDataHome, PRODUCT_NAME_LOWER);
+
+	return xdgHomePath;
+#endif
+#endif
+}
+
+void MigrateHomePath()
+{
+#if defined(__linux__)
+	const char* home = getenv("HOME");
+	if (!home) {
+		// in this case DefaultHomePath() will return "",
+		// hence homePath will be neither the legacy one
+		// neither the xdg one, hence there is nothing we can do.
+		return;
 	}
 
-	xdgHomePath = Path::Build(xdgDataHome, PRODUCT_NAME_LOWER);
+	const char* _xdgDataHome = getenv("XDG_DATA_HOME");
+	std::string xdgDataHome = _xdgDataHome == NULL ? Path::Build(Path::Build(std::string(home), ".local") ,"share") : std::string(_xdgDataHome);
+	std::string xdgHomePath = DefaultHomePath();
+	std::string legacyHomePath = Path::Build(std::string(home), "." PRODUCT_NAME_LOWER);
+	struct stat stl, stx;
 
 	if (lstat(legacyHomePath.c_str(), &stl) == 0) {
 		if (S_ISDIR(stl.st_mode) || S_ISLNK(stl.st_mode)) {
@@ -2118,9 +2133,6 @@ std::string DefaultHomePath()
 			}
 		}
 	}
-
-	return xdgHomePath;
-#endif
 #endif
 }
 #endif // BUILD_VM

src/common/FileSystem.h

@@ -485,6 +485,7 @@ void Initialize();
 #else
 std::string DefaultBasePath();
 std::string DefaultHomePath();
+void MigrateHomePath();
 void Initialize(Str::StringRef homePath, Str::StringRef libPath, const std::vector<std::string>& paths);
 #endif
 

src/engine/framework/System.cpp

@@ -418,6 +418,7 @@ static void ParseCmdline(int argc, char** argv, cmdlineArgs_t& cmdlineArgs)
 #endif
 
 	bool foundCommands = false;
+	bool foundHomePathCommand = false;
 	for (int i = 1; i < argc; i++) {
 		// A + indicate the start of a command that should be run on startup
 		if (argv[i][0] == '+') {
@@ -489,6 +490,7 @@ static void ParseCmdline(int argc, char** argv, cmdlineArgs_t& cmdlineArgs)
 				Log::Warn("Missing argument for -homepath");
 				continue;
 			}
+			foundHomePathCommand = true;
 			cmdlineArgs.homePath = argv[i + 1];
 			i++;
 		} else if (!strcmp(argv[i], "-resetconfig")) {
@@ -504,6 +506,10 @@ static void ParseCmdline(int argc, char** argv, cmdlineArgs_t& cmdlineArgs)
 			continue;
 		}
 	}
+
+	if (!foundHomePathCommand) {
+		FS::MigrateHomePath();
+	}
 }
 
 // Apply a -set argument early, before the configuration files are loaded