Fluorine Manager: full Linux port of Mod Organizer 2

Complete native Linux port with FUSE-based virtual filesystem,
Proton/umu-run integration, and Flatpak packaging.

Key features:
- FUSE VFS replacing Windows USVFS (in-process + standalone helper for Flatpak)
- Proton/GE-Proton/umu-run launcher with env var forwarding
- Flatpak support (sandbox-aware VFS, NXM handler, umu-run)
- Wine prefix management UI
- Case-insensitive path resolution for Linux filesystems
- QSettings-safe INI handling (avoids Bethesda INI corruption)
- Portable instance support with auto-generated launcher scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/libs/usvfs/src/shared/exceptionex.cpp b/libs/usvfs/src/shared/exceptionex.cpp
new file mode 100644
index 0000000..4a814b5
--- /dev/null
+++ b/libs/usvfs/src/shared/exceptionex.cpp
@@ -0,0 +1,82 @@
+/*
+Userspace Virtual Filesystem
+
+Copyright (C) 2015 Sebastian Herbord. All rights reserved.
+
+This file is part of usvfs.
+
+usvfs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+usvfs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with usvfs. If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "exceptionex.h"
+#include "winapi.h"
+#include <spdlog/spdlog.h>
+
+namespace usvfs::shared
+{
+
+std::string windows_error::constructMessage(const std::string& input, int inErrorCode)
+{
+  std::ostringstream finalMessage;
+  finalMessage << input;
+
+  LPSTR buffer = nullptr;
+
+  DWORD errorCode = inErrorCode != -1 ? inErrorCode : GetLastError();
+
+  // TODO: the message is not english?
+  if (FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+                     nullptr, errorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                     (LPSTR)&buffer, 0, nullptr) == 0) {
+    finalMessage << " (errorcode " << errorCode << ")";
+  } else {
+    LPSTR lastChar = buffer + strlen(buffer) - 2;
+    *lastChar      = '\0';
+    finalMessage << " (" << buffer << " [" << errorCode << "])";
+    LocalFree(buffer);  // allocated by FormatMessage
+  }
+
+  SetLastError(
+      errorCode);  // restore error code because FormatMessage might have modified it
+  return finalMessage.str();
+}
+
+}  // namespace usvfs::shared
+
+void logExtInfo(const std::exception& e, LogLevel logLevel)
+{
+  std::string content;
+
+  if (const std::string* msg = boost::get_error_info<ex_msg>(e)) {
+    content = *msg;
+  }
+
+  if (const DWORD* errorCode = boost::get_error_info<ex_win_errcode>(e)) {
+    content = std::string("error: ") + winapi::ex::ansi::errorString(*errorCode);
+  }
+
+  switch (logLevel) {
+  case LogLevel::Debug:
+    spdlog::get("usvfs")->debug(content);
+    break;
+  case LogLevel::Info:
+    spdlog::get("usvfs")->info(content);
+    break;
+  case LogLevel::Warning:
+    spdlog::get("usvfs")->warn(content);
+    break;
+  case LogLevel::Error:
+    spdlog::get("usvfs")->error(content);
+    break;
+  }
+}