void FFeaturePackContentSourceProvider::StartUpDirectoryWatcher()
{
FDirectoryWatcherModule& DirectoryWatcherModule = FModuleManager::LoadModuleChecked<FDirectoryWatcherModule>(TEXT("DirectoryWatcher"));
IDirectoryWatcher* DirectoryWatcher = DirectoryWatcherModule.Get();
if (DirectoryWatcher)
{
// If the path doesn't exist on disk, make it so the watcher will work.
IFileManager::Get().MakeDirectory(*FeaturePackPath);
DirectoryChangedDelegate = IDirectoryWatcher::FDirectoryChanged::CreateRaw(this, &FFeaturePackContentSourceProvider::OnFeaturePackDirectoryChanged);
DirectoryWatcher->RegisterDirectoryChangedCallback_Handle(FeaturePackPath, DirectoryChangedDelegate, DirectoryChangedDelegateHandle);
}
}
void UDirectoryWatcher::Watch(const FString& InDirectory)
{
Unwatch();
FDirectoryWatcherModule& DirectoryWatcherModule = FModuleManager::Get().LoadModuleChecked<FDirectoryWatcherModule>(TEXT("DirectoryWatcher"));
IDirectoryWatcher* DirectoryWatcher = DirectoryWatcherModule.Get();
Directory = FPaths::IsRelative(InDirectory) ? FPaths::ConvertRelativePathToFull(InDirectory) : InDirectory;
Changed = IDirectoryWatcher::FDirectoryChanged::CreateLambda([&](const TArray<FFileChangeData>& FileChanges){
for (auto Change : FileChanges)
{
FPaths::NormalizeFilename(Change.Filename);
switch (Change.Action)
{
case FFileChangeData::FCA_Added:
Added.Add(Change.Filename);
break;
case FFileChangeData::FCA_Modified:
Modified.Add(Change.Filename);
break;
case FFileChangeData::FCA_Removed:
Removed.Add(Change.Filename);
break;
}
}
OnChanged.Broadcast();
Added.Empty();
Modified.Empty();
Removed.Empty();
});
if (IFileManager::Get().DirectoryExists(*Directory))
{
DirectoryWatcher->RegisterDirectoryChangedCallback_Handle(Directory, Changed, DelegateHandle, true);
}
}
/**
* Kicks directory watcher test/
*/
int32 DirectoryWatcherTest(const TCHAR* CommandLine)
{
FPlatformMisc::SetCrashHandler(NULL);
FPlatformMisc::SetGracefulTerminationHandler();
GEngineLoop.PreInit(CommandLine);
UE_LOG(LogTestPAL, Display, TEXT("Running directory watcher test."));
IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
FString TestDir = FString::Printf(TEXT("%sDirectoryWatcherTest%d"), FPlatformProcess::UserTempDir(), FPlatformProcess::GetCurrentProcessId());
if (PlatformFile.CreateDirectory(*TestDir) && PlatformFile.CreateDirectory(*(TestDir + TEXT("/subtest"))))
{
FChangeDetector Detector;
FDelegateHandle DirectoryChangedHandle;
IDirectoryWatcher* DirectoryWatcher = FModuleManager::Get().LoadModuleChecked<FDirectoryWatcherModule>(TEXT("DirectoryWatcher")).Get();
if (DirectoryWatcher)
{
auto Callback = IDirectoryWatcher::FDirectoryChanged::CreateRaw(&Detector, &FChangeDetector::OnDirectoryChanged);
DirectoryWatcher->RegisterDirectoryChangedCallback_Handle(TestDir, Callback, DirectoryChangedHandle);
UE_LOG(LogTestPAL, Display, TEXT("Registered callback for changes in '%s'"), *TestDir);
}
else
{
UE_LOG(LogTestPAL, Fatal, TEXT("Could not get DirectoryWatcher module"));
}
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// create and remove directory
UE_LOG(LogTestPAL, Display, TEXT("Creating DIRECTORY '%s'"), *(TestDir + TEXT("/test")));
verify(PlatformFile.CreateDirectory(*(TestDir + TEXT("/test"))));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
UE_LOG(LogTestPAL, Display, TEXT("Deleting DIRECTORY '%s'"), *(TestDir + TEXT("/test")));
verify(PlatformFile.DeleteDirectory(*(TestDir + TEXT("/test"))));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// create and remove in a sub directory
UE_LOG(LogTestPAL, Display, TEXT("Creating DIRECTORY '%s'"), *(TestDir + TEXT("/subtest/blah")));
verify(PlatformFile.CreateDirectory(*(TestDir + TEXT("/subtest/blah"))));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
UE_LOG(LogTestPAL, Display, TEXT("Deleting DIRECTORY '%s'"), *(TestDir + TEXT("/subtest/blah")));
verify(PlatformFile.DeleteDirectory(*(TestDir + TEXT("/subtest/blah"))));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
{
// create file
FString DummyFileName = TestDir + TEXT("/test file.bin");
UE_LOG(LogTestPAL, Display, TEXT("Creating FILE '%s'"), *DummyFileName);
IFileHandle* DummyFile = PlatformFile.OpenWrite(*DummyFileName);
check(DummyFile);
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// modify file
UE_LOG(LogTestPAL, Display, TEXT("Modifying FILE '%s'"), *DummyFileName);
uint8 Contents = 0;
DummyFile->Write(&Contents, sizeof(Contents));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// close the file
UE_LOG(LogTestPAL, Display, TEXT("Closing FILE '%s'"), *DummyFileName);
delete DummyFile;
DummyFile = nullptr;
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// delete file
UE_LOG(LogTestPAL, Display, TEXT("Deleting FILE '%s'"), *DummyFileName);
verify(PlatformFile.DeleteFile(*DummyFileName));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
}
// now the same in a grandchild directory
{
FString GrandChildDir = TestDir + TEXT("/subtest/grandchild");
UE_LOG(LogTestPAL, Display, TEXT("Creating DIRECTORY '%s'"), *GrandChildDir);
verify(PlatformFile.CreateDirectory(*GrandChildDir));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
{
// create file
FString DummyFileName = GrandChildDir + TEXT("/test file.bin");
UE_LOG(LogTestPAL, Display, TEXT("Creating FILE '%s'"), *DummyFileName);
IFileHandle* DummyFile = PlatformFile.OpenWrite(*DummyFileName);
check(DummyFile);
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// modify file
UE_LOG(LogTestPAL, Display, TEXT("Modifying FILE '%s'"), *DummyFileName);
uint8 Contents = 0;
DummyFile->Write(&Contents, sizeof(Contents));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// close the file
UE_LOG(LogTestPAL, Display, TEXT("Closing FILE '%s'"), *DummyFileName);
delete DummyFile;
DummyFile = nullptr;
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
// delete file
UE_LOG(LogTestPAL, Display, TEXT("Deleting FILE '%s'"), *DummyFileName);
PlatformFile.DeleteFile(*DummyFileName);
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
}
UE_LOG(LogTestPAL, Display, TEXT("Deleting DIRECTORY '%s'"), *GrandChildDir);
verify(PlatformFile.DeleteDirectory(*GrandChildDir));
DirectoryWatcher->Tick(1.0f);
FPlatformProcess::Sleep(1.0f);
DirectoryWatcher->Tick(1.0f);
}
// clean up
verify(DirectoryWatcher->UnregisterDirectoryChangedCallback_Handle(TestDir, DirectoryChangedHandle));
// remove dirs as well
verify(PlatformFile.DeleteDirectory(*(TestDir + TEXT("/subtest"))));
verify(PlatformFile.DeleteDirectory(*TestDir));
UE_LOG(LogTestPAL, Display, TEXT("End of test"));
}
else
{
UE_LOG(LogTestPAL, Fatal, TEXT("Could not create test directory %s."), *TestDir);
}
FEngineLoop::AppPreExit();
FEngineLoop::AppExit();
return 0;
}