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/plugin_python/src/runner/error.h b/libs/plugin_python/src/runner/error.h
new file mode 100644
index 0000000..341c7ea
--- /dev/null
+++ b/libs/plugin_python/src/runner/error.h
@@ -0,0 +1,82 @@
+#ifndef ERROR_H
+#define ERROR_H
+
+#include <format>
+
+#include <QString>
+
+#include <pybind11/pybind11.h>
+
+#include <uibase/utility.h>
+
+namespace pyexcept {
+
+    /**
+     * @brief Exception to throw when a python implementation does not implement
+     *     a pure virtual function.
+     */
+    class MissingImplementation : public MOBase::Exception {
+    public:
+        MissingImplementation(std::string const& className,
+                              std::string const& methodName)
+            : Exception(QString::fromStdString(
+                  std::format("Python class implementing \"{}\" has no "
+                              "implementation of method \"{}\".",
+                              className, methodName)))
+        {
+        }
+    };
+
+    /**
+     * @brief Exception to throw when a python error occurs.
+     */
+    class PythonError : public MOBase::Exception {
+    public:
+        /**
+         * @brief Create a new PythonError, fetching the error message from
+         * python. If the message cannot be retrieved, `defaultErrorMessage()`
+         * is used instead.
+         */
+        PythonError(pybind11::error_already_set const& ex) : Exception(ex.what()) {}
+
+        /**
+         * @brief Create a new PythonError with the given message.
+         *
+         * @param message Message for the exception.
+         */
+        PythonError(QString message) : Exception(message) {}
+    };
+
+    /**
+     * @brief Exception to throw when an unknown error occured. This is
+     * typically thrown from a catch(...) block.
+     */
+    class UnknownException : public MOBase::Exception {
+    public:
+        /**
+         * @brief Create a new UnknownException with the default message.
+         *
+         * @see defaultErrorMessage
+         */
+        UnknownException() : Exception(defaultErrorMessage()) {}
+
+        /**
+         * @brief Create a new UnknownException with the given message.
+         *
+         * @param message Message for the exception.
+         */
+        UnknownException(QString message) : Exception(message) {}
+
+    protected:
+        /**
+         *
+         */
+        static QString defaultErrorMessage()
+        {
+            return QObject::tr("An unknown exception was thrown in python code.");
+        }
+    };
+
+}  // namespace pyexcept
+
+#endif  // ERROR_H