Avoid plugin caching

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-project(qfiletransport VERSION 0.1 LANGUAGES CXX)
+project(qfiletransport VERSION 0.2 LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -48,3 +48,4 @@ add_library(${CMAKE_PROJECT_NAME} SHARED qfiletransport.cpp)
 target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE Qt5::Core audcore)
 set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES PREFIX "")
 set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES LINK_FLAGS_RELEASE -s)
+target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE "EXPORT=__declspec(dllexport)")

qfiletransport.cpp

@@ -9,6 +9,7 @@
 #include <QDirIterator>
 #include <QFile>
 #include <QFileInfo>
+#include <QRegularExpression>
 #include <QString>
 #include <QUrl>
 
@@ -111,6 +112,28 @@ class QFileTransport : public TransportPlugin
         installUriSchemeHook();
     }
 
+    void cleanup() Q_DECL_OVERRIDE
+    {
+        /// @note Clear timestamp from plugin registry to avoid plugin caching
+        /// Cached plugins is lazy-loaded, but we need to install hook
+        StringBuf path =
+            filename_build({aud_get_path(AudPath::UserDir), "plugin-registry"});
+        QFile file((QString(path)));
+        if (!file.open(QFile::ReadWrite | QFile::Text))
+            return;
+
+        QString registryData = QString::fromUtf8(file.readAll());
+        const QRegularExpression re("(qfiletransport\\.dll[\r\n]stamp )[0-9]*",
+                                    QRegularExpression::MultilineOption);
+        const QRegularExpressionMatch match = re.match(registryData);
+        if (match.hasMatch())
+            registryData.replace(re, match.captured(1) + "0");
+        file.seek(0);
+        file.resize(0);
+        file.write(registryData.toUtf8());
+        file.close();
+    }
+
     VFSImpl * fopen(const char * path, const char * mode,
                     String & error) Q_DECL_OVERRIDE
     {
@@ -289,4 +312,4 @@ class QFileTransport : public TransportPlugin
     };
 };
 
-__declspec(dllexport) QFileTransport aud_plugin_instance;
+EXPORT QFileTransport aud_plugin_instance;