Detect Flatpak installations of Rider and Visual Studio Code

Source/Editor/Scripting/CodeEditors/RiderCodeEditor.cpp

@@ -191,7 +191,6 @@ void RiderCodeEditor::FindEditors(Array<CodeEditor*>* output)
 #endif
 #if PLATFORM_LINUX
     // TODO: detect Snap installations
-    // TODO: detect Flatpak installations
     // TODO: detect by reading the jetbrains-rider.desktop file from ~/.local/share/applications and /usr/share/applications?
 
     FileSystem::GetChildDirectories(subDirectories, TEXT("/usr/share/rider"));
@@ -202,6 +201,11 @@ void RiderCodeEditor::FindEditors(Array<CodeEditor*>* output)
     // Versions installed via JetBrains Toolbox
     FileSystem::GetChildDirectories(subDirectories, localAppDataPath / TEXT(".local/share/JetBrains/Toolbox/apps/Rider/ch-0"));
     FileSystem::GetChildDirectories(subDirectories, localAppDataPath / TEXT(".local/share/JetBrains/Toolbox/apps/Rider/ch-1")); // Beta versions
+
+    // Detect Flatpak installations
+    SearchDirectory(&installations,
+        TEXT("/var/lib/flatpak/app/com.jetbrains.Rider/current/active/files/extra/rider/"),
+        TEXT("flatpak run com.jetbrains.Rider"));
 #endif
 
     for (auto directory : subDirectories)