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, 293 insertions, 0 deletions

diff --git a/libs/check_fnis/src/checkfnis.cpp b/libs/check_fnis/src/checkfnis.cpp
new file mode 100644
index 0000000..73f2ac0
--- /dev/null
+++ b/libs/check_fnis/src/checkfnis.cpp
@@ -0,0 +1,293 @@
+#include "checkfnis.h"
+
+#include <uibase/iplugingame.h>
+#include <uibase/pluginsetting.h>
+#include <uibase/questionboxmemory.h>
+#include <uibase/report.h>
+#include <uibase/scopeguard.h>
+
+#include <QCryptographicHash>
+#include <QDialogButtonBox>
+#include <QDir>
+#include <QFile>
+#include <QFileInfo>
+#include <QMessageBox>
+#include <QStringList>
+#include <QVariant>
+
+#include <Qt>       // for Qt::CaseInsensitive
+#include <QtDebug>  // for qCritical, qDebug
+
+#include <functional>
+
+using namespace MOBase;
+
+CheckFNIS::CheckFNIS()
+    : m_MOInfo(nullptr), m_Active(false),
+      m_MatchExpressions(std::vector<QRegularExpression>{
+          // MSVC2013 bug. The (std::vector<QRegExp> shouldn't be necessary
+          QRegularExpression("\\\\FNIS_.*_List\\.txt$",
+                             QRegularExpression::PatternOption::CaseInsensitiveOption),
+          QRegularExpression("\\\\FNIS.*Behavior\\.txt$",
+                             QRegularExpression::PatternOption::CaseInsensitiveOption),
+          QRegularExpression("\\\\PatchList\\.txt$",
+                             QRegularExpression::PatternOption::CaseInsensitiveOption),
+          QRegularExpression(
+              "\\\\skeleton.*\\.hkx$",
+              QRegularExpression::PatternOption::CaseInsensitiveOption)}),
+      m_SensitiveMatchExpressions(std::vector<QRegularExpression>{
+          QRegularExpression("\\\\animations\\\\.*\\.hkx$",
+                             QRegularExpression::PatternOption::CaseInsensitiveOption)})
+{}
+
+CheckFNIS::~CheckFNIS() {}
+
+bool CheckFNIS::init(IOrganizer* moInfo)
+{
+  m_MOInfo = moInfo;
+
+  if (!moInfo->onAboutToRun([this](const auto& binary) {
+        return fnisCheck(binary);
+      })) {
+    qCritical("failed to connect to about to run event");
+    return false;
+  }
+
+  if (!moInfo->onFinishedRun(std::bind(&CheckFNIS::fnisEndCheck, this,
+                                       std::placeholders::_1, std::placeholders::_2))) {
+    qCritical("failed to connect to finished run event");
+    return false;
+  }
+
+  return true;
+}
+
+QString CheckFNIS::name() const
+{
+  return "FNIS Checker";
+}
+
+QString CheckFNIS::localizedName() const
+{
+  return tr("FNIS Checker");
+}
+
+QString CheckFNIS::author() const
+{
+  return "Tannin";
+}
+
+QString CheckFNIS::description() const
+{
+  return tr("Checks if FNIS behaviours need to be updated whenever you start the game."
+            " This is only relevant for Skyrim and if FNIS is installed.<br>");
+}
+
+VersionInfo CheckFNIS::version() const
+{
+  return VersionInfo(1, 0, 1, VersionInfo::RELEASE_FINAL);
+}
+
+std::vector<std::shared_ptr<const MOBase::IPluginRequirement>>
+CheckFNIS::requirements() const
+{
+  return {Requirements::gameDependency("Skyrim")};
+}
+
+QList<PluginSetting> CheckFNIS::settings() const
+{
+  QList<PluginSetting> result;
+  result.push_back(PluginSetting("sensitive",
+                                 "check changes on non-fnis animations. Makes this "
+                                 "more reliable but will cause FNIS to be called more "
+                                 "often than necessary.",
+                                 QVariant(false)));
+  return result;
+}
+
+bool CheckFNIS::testFileRelevant(const IOrganizer::FileInfo& fileName) const
+{
+  if (!fileName.archive.isEmpty()) {
+    return false;
+  }
+
+  for (auto& expr : m_MatchExpressions) {
+    auto match = expr.match(fileName.filePath);
+    if (match.hasMatch()) {
+      return true;
+    }
+  }
+
+  if (m_MOInfo->pluginSetting(name(), "sensitive").toBool()) {
+    for (auto& expr : m_SensitiveMatchExpressions) {
+      auto match = expr.match(fileName.filePath);
+      if (match.hasMatch()) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+void CheckFNIS::findRelevantFilesRecursive(const QString& path,
+                                           QMap<QString, QString>& fileList) const
+{
+  // find all relevant files
+  QList<IOrganizer::FileInfo> files = m_MOInfo->findFileInfos(
+      path, std::bind(&CheckFNIS::testFileRelevant, this, std::placeholders::_1));
+  foreach (const IOrganizer::FileInfo& fileInfo, files) {
+    QFile file(fileInfo.filePath);
+    if (file.open(QIODevice::ReadOnly)) {
+      QString hash(
+          QCryptographicHash::hash(file.readAll(), QCryptographicHash::Md5).toHex());
+      fileList.insert(fileInfo.filePath, hash);
+    } else {
+      qCritical("failed to open %s", qUtf8Printable(fileInfo.filePath));
+    }
+  }
+
+  QStringList subDirectories = m_MOInfo->listDirectories(path);
+  foreach (const QString& directory, subDirectories) {
+    findRelevantFilesRecursive(QDir(path).filePath(directory), fileList);
+  }
+}
+
+QString CheckFNIS::generateIdentifier() const
+{
+  QMap<QString, QString> fileList;
+
+  findRelevantFilesRecursive("meshes\\actors", fileList);
+
+  QStringList flattenedList;
+  for (auto iter = fileList.begin(); iter != fileList.end(); ++iter) {
+    flattenedList.append(iter.key() + "=" + iter.value());
+  }
+
+  return QCryptographicHash::hash(flattenedList.join(",").toUtf8(),
+                                  QCryptographicHash::Md5)
+      .toHex();
+}
+
+bool CheckFNIS::appIsFNIS(QString const& application, QString const& fnisApp)
+{
+  return QString::compare(QDir::fromNativeSeparators(application),
+                          QDir::fromNativeSeparators(fnisApp),
+                          Qt::CaseInsensitive) == 0;
+}
+
+QString CheckFNIS::getFnisPath() const
+{
+  if (!m_MOInfo->pluginSetting(name(), "enabled").toBool()) {
+    return "";
+  }
+
+  // Check if it's actually installed (...)
+  QStringList fnisBinaryList = m_MOInfo->findFiles(
+      "tools/GenerateFNIS_for_Users", [](const QString& fileName) -> bool {
+        return fileName.endsWith("GenerateFNISforUsers.exe", Qt::CaseInsensitive);
+      });
+
+  if (fnisBinaryList.count() == 0) {
+    // fnis seems not to be installed even though this is enabled
+    qDebug("fnis not installed");
+    return "";
+  }
+
+  // As this is looking in the vfs, there can be precisely 0 or 1 instances of FNIS
+  return fnisBinaryList.at(0);
+}
+
+bool CheckFNIS::fnisCheck(const QString& application)
+{
+
+  QString fnisApp(getFnisPath());
+  if (fnisApp.isEmpty() || appIsFNIS(application, fnisApp)) {
+    return true;
+  }
+
+  // prevent this check from being called recursively
+  if (m_Active) {
+    return true;
+  }
+
+  m_Active = true;
+  ON_BLOCK_EXIT([&] {
+    m_Active = false;
+  });
+
+  QString const newHash = generateIdentifier();
+
+  if (newHash == m_MOInfo->persistent(name(), m_MOInfo->profileName(), "").toString()) {
+    // Don't need to run fnis as nothing relevant has changed.
+    return true;
+  }
+
+  QDialogButtonBox::StandardButton res = QuestionBoxMemory::query(
+      nullptr, "fnisCheck", QFileInfo(application).fileName(),
+      tr("Run FNIS before %1?").arg(application),
+      tr("FNIS source data has been changed. You should run GenerateFNIS.exe now."),
+      QDialogButtonBox::Yes | QDialogButtonBox::No | QDialogButtonBox::Cancel,
+      QDialogButtonBox::Yes);
+
+  if (res == QDialogButtonBox::Yes) {
+    HANDLE process = m_MOInfo->startApplication(fnisApp);
+    bool cont      = true;
+    if (process == INVALID_HANDLE_VALUE) {
+      reportError(tr("Failed to start %1").arg(fnisApp));
+    } else {
+      DWORD exitCodeU;
+      if (m_MOInfo->waitForApplication(process, &exitCodeU)) {
+        int exitCode = static_cast<int>(exitCodeU);
+        if (exitCode != 0) {
+          cont = QMessageBox::question(
+                     nullptr, tr("Start %1?").arg(application),
+                     tr("FNIS reported a %1, do you want to run the application "
+                        "anyway?")
+                         .arg(exitCode < 0 ? tr("warning") : tr("critical error")),
+                     QMessageBox::Yes | QMessageBox::No,
+                     QMessageBox::No) == QMessageBox::Yes;
+        }
+      } else {
+        cont = QMessageBox::question(nullptr, tr("Start %1?").arg(application),
+                                     tr("Failed to determine FNIS exit code, do you "
+                                        "want to run the application "
+                                        "anyway?"),
+                                     QMessageBox::Yes | QMessageBox::No,
+                                     QMessageBox::No) == QMessageBox::Yes;
+      }
+      if (cont) {
+        m_MOInfo->setPersistent(name(), m_MOInfo->profileName(), newHash);
+      }
+    }
+    return cont;
+  } else if (res == QDialogButtonBox::No) {
+    return true;
+  } else {
+    // Don't run the app if they pressed cancel
+    return false;
+  }
+}
+
+void CheckFNIS::fnisEndCheck(const QString& application, unsigned int code)
+{
+  if (appIsFNIS(application, getFnisPath())) {
+    bool update  = true;
+    int exitCode = static_cast<int>(code);
+    if (exitCode != 0) {
+      update =
+          QMessageBox::question(
+              nullptr, tr("Start %1?").arg(application),
+              tr("FNIS reported a %1. Do you want to assume it worked?")
+                  .arg(exitCode < 0 ? tr("warning") : tr("critical error")),
+              QMessageBox::Yes | QMessageBox::No, QMessageBox::No) == QMessageBox::Yes;
+    }
+    if (update) {
+      m_MOInfo->setPersistent(name(), m_MOInfo->profileName(), generateIdentifier());
+    }
+  }
+}
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
+Q_EXPORT_PLUGIN2(checkfnis, CheckFNIS)
+#endif