bool UOnlineHotfixManager::HotfixPakIniFile(const FString& FileName)
{
FConfigFile* ConfigFile = GetConfigFile(FileName);
ConfigFile->Combine(FileName);
UE_LOG(LogHotfixManager, Log, TEXT("Hotfix merged INI (%s) found in a PAK file"), *FileName);
FName IniFileName(*FileName, FNAME_Find);
int32 NumObjectsReloaded = 0;
const double StartTime = FPlatformTime::Seconds();
// Now that we have a list of classes to update, we can iterate objects and
// reload if they match the INI file that was changed
for (FObjectIterator It; It; ++It)
{
UClass* Class = It->GetClass();
if (Class->HasAnyClassFlags(CLASS_Config) &&
Class->ClassConfigName == IniFileName)
{
// Force a reload of the config vars
It->ReloadConfig();
NumObjectsReloaded++;
}
}
UE_LOG(LogHotfixManager, Log, TEXT("Updating config from %s took %f seconds reloading %d objects"),
*FileName, FPlatformTime::Seconds() - StartTime, NumObjectsReloaded);
return true;
}
bool UOnlineHotfixManager::HotfixIniFile(const FString& FileName, const FString& IniData)
{
FConfigFile* ConfigFile = GetConfigFile(FileName);
// Merge the string into the config file
ConfigFile->CombineFromBuffer(IniData);
TArray<UClass*> Classes;
TArray<UObject*> PerObjectConfigObjects;
int32 StartIndex = 0;
int32 EndIndex = 0;
// Find the set of object classes that were affected
while (StartIndex >= 0 && StartIndex < IniData.Len() && EndIndex >= StartIndex)
{
// Find the next section header
StartIndex = IniData.Find(TEXT("["), ESearchCase::IgnoreCase, ESearchDir::FromStart, StartIndex);
if (StartIndex > -1)
{
// Find the ending section identifier
EndIndex = IniData.Find(TEXT("]"), ESearchCase::IgnoreCase, ESearchDir::FromStart, StartIndex);
if (EndIndex > StartIndex)
{
int32 PerObjectNameIndex = IniData.Find(TEXT(" "), ESearchCase::IgnoreCase, ESearchDir::FromStart, StartIndex);
// Per object config entries will have a space in the name, but classes won't
if (PerObjectNameIndex == -1 || PerObjectNameIndex > EndIndex)
{
if (IniData.StartsWith(TEXT("[/Script/"), ESearchCase::IgnoreCase))
{
const int32 ScriptSectionTag = 9;
// Snip the text out and try to find the class for that
const FString PackageClassName = IniData.Mid(StartIndex + ScriptSectionTag, EndIndex - StartIndex - ScriptSectionTag);
// Find the class for this so we know what to update
UClass* Class = FindObject<UClass>(nullptr, *PackageClassName, true);
if (Class)
{
// Add this to the list to check against
Classes.Add(Class);
}
}
}
// Handle the per object config case by finding the object for reload
else
{
const int32 Count = PerObjectNameIndex - StartIndex - 1;
const FString PerObjectName = IniData.Mid(StartIndex + 1, Count);
// Explicitly search the transient package (won't update non-transient objects)
UObject* PerObject = FindObject<UObject>(ANY_PACKAGE, *PerObjectName, false);
if (PerObject != nullptr)
{
PerObjectConfigObjects.Add(PerObject);
}
}
StartIndex = EndIndex;
}
}
}
int32 NumObjectsReloaded = 0;
const double StartTime = FPlatformTime::Seconds();
if (Classes.Num())
{
// Now that we have a list of classes to update, we can iterate objects and reload
for (FObjectIterator It; It; ++It)
{
UClass* Class = It->GetClass();
if (Class->HasAnyClassFlags(CLASS_Config))
{
// Check to see if this class is in our list (yes, potentially n^2, but not in practice)
for (int32 ClassIndex = 0; ClassIndex < Classes.Num(); ClassIndex++)
{
if (It->IsA(Classes[ClassIndex]))
{
// Force a reload of the config vars
It->ReloadConfig();
NumObjectsReloaded++;
break;
}
}
}
}
}
// Reload any PerObjectConfig objects that were affected
for (auto ReloadObject : PerObjectConfigObjects)
{
ReloadObject->ReloadConfig();
NumObjectsReloaded++;
}
UE_LOG(LogHotfixManager, Log, TEXT("Updating config from %s took %f seconds and reloaded %d objects"),
*FileName, FPlatformTime::Seconds() - StartTime, NumObjectsReloaded);
return true;
}