void FDesktopPlatformWindows::EnumerateEngineInstallations(TMap<FString, FString> &OutInstallations)
{
// Enumerate the binary installations
EnumerateLauncherEngineInstallations(OutInstallations);
// Enumerate the per-user installations
HKEY hKey;
if (RegOpenKeyEx(HKEY_CURRENT_USER, InstallationsSubKey, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS)
{
// Get a list of all the directories
TArray<FString> UniqueDirectories;
OutInstallations.GenerateValueArray(UniqueDirectories);
// Enumerate all the installations
TArray<FString> InvalidKeys;
for (::DWORD Index = 0;; Index++)
{
TCHAR ValueName[256];
TCHAR ValueData[MAX_PATH];
::DWORD ValueType = 0;
::DWORD ValueNameLength = sizeof(ValueName) / sizeof(ValueName[0]);
::DWORD ValueDataSize = sizeof(ValueData);
LRESULT Result = RegEnumValue(hKey, Index, ValueName, &ValueNameLength, NULL, &ValueType, (BYTE*)&ValueData[0], &ValueDataSize);
if(Result == ERROR_SUCCESS)
{
int32 ValueDataLength = ValueDataSize / sizeof(TCHAR);
if(ValueDataLength > 0 && ValueData[ValueDataLength - 1] == 0) ValueDataLength--;
FString NormalizedInstalledDirectory(ValueDataLength, ValueData);
FPaths::NormalizeDirectoryName(NormalizedInstalledDirectory);
FPaths::CollapseRelativeDirectories(NormalizedInstalledDirectory);
if(IsValidRootDirectory(NormalizedInstalledDirectory) && !UniqueDirectories.Contains(NormalizedInstalledDirectory))
{
OutInstallations.Add(ValueName, NormalizedInstalledDirectory);
UniqueDirectories.Add(NormalizedInstalledDirectory);
}
else
{
InvalidKeys.Add(ValueName);
}
}
else if(Result == ERROR_NO_MORE_ITEMS)
{
break;
}
}
// Remove all the keys which weren't valid
for(const FString InvalidKey: InvalidKeys)
{
RegDeleteValue(hKey, *InvalidKey);
}
RegCloseKey(hKey);
}
}
void FDesktopPlatformLinux::EnumerateEngineInstallations(TMap<FString, FString> &OutInstallations)
{
EnumerateLauncherEngineInstallations(OutInstallations);
FString UProjectPath = FString(FPlatformProcess::ApplicationSettingsDir()) / "Unreal.uproject";
FArchive* File = IFileManager::Get().CreateFileWriter(*UProjectPath, FILEWRITE_EvenIfReadOnly);
if (File)
{
File->Close();
delete File;
}
else
{
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Unable to write to Settings Directory", TCHAR_TO_UTF8(*UProjectPath), NULL);
}
FConfigFile ConfigFile;
FString ConfigPath = FString(FPlatformProcess::ApplicationSettingsDir()) / FString(TEXT("UnrealEngine")) / FString(TEXT("Install.ini"));
ConfigFile.Read(ConfigPath);
FConfigSection &Section = ConfigFile.FindOrAdd(TEXT("Installations"));
// @todo: currently we can enumerate only this installation
FString EngineDir = FPaths::EngineDir();
FString EngineId;
const FName* Key = Section.FindKey(EngineDir);
if (Key)
{
EngineId = Key->ToString();
}
else
{
if (!OutInstallations.FindKey(EngineDir))
{
EngineId = FGuid::NewGuid().ToString(EGuidFormats::DigitsWithHyphens);
Section.AddUnique(*EngineId, EngineDir);
ConfigFile.Dirty = true;
}
}
if (!EngineId.IsEmpty() && !OutInstallations.Find(EngineId))
{
OutInstallations.Add(EngineId, EngineDir);
}
ConfigFile.Write(ConfigPath);
IFileManager::Get().Delete(*UProjectPath);
}
void FDesktopPlatformWindows::EnumerateEngineInstallations(TMap<FString, FString> &OutInstallations)
{
// Enumerate the binary installations
EnumerateLauncherEngineInstallations(OutInstallations);
// Enumerate the per-user installations
HKEY hKey;
if (RegOpenKeyEx(HKEY_CURRENT_USER, InstallationsSubKey, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS)
{
// Enumerate all the installations
for (::DWORD Index = 0;; Index++)
{
TCHAR ValueName[256];
TCHAR ValueData[MAX_PATH];
::DWORD ValueType = 0;
::DWORD ValueNameLength = sizeof(ValueName) / sizeof(ValueName[0]);
::DWORD ValueDataSize = sizeof(ValueData);
LRESULT Result = RegEnumValue(hKey, Index, ValueName, &ValueNameLength, NULL, &ValueType, (BYTE*)&ValueData[0], &ValueDataSize);
if(Result == ERROR_SUCCESS)
{
int32 ValueDataLength = ValueDataSize / sizeof(TCHAR);
if(ValueDataLength > 0 && ValueData[ValueDataLength - 1] == 0) ValueDataLength--;
FString NormalizedInstalledDirectory(ValueDataLength, ValueData);
FPaths::NormalizeDirectoryName(NormalizedInstalledDirectory);
OutInstallations.Add(ValueName, NormalizedInstalledDirectory);
}
else if(Result == ERROR_NO_MORE_ITEMS)
{
break;
}
}
// Trim the list to everything that's valid
for(TMap<FString, FString>::TIterator Iter(OutInstallations); Iter; ++Iter)
{
if (!IsValidRootDirectory(Iter.Value()))
{
RegDeleteValue(hKey, *Iter.Key());
Iter.RemoveCurrent();
}
}
RegCloseKey(hKey);
}
}
