/// <summary>
/// Gets the latest write time of any of the UnrealHeaderTool binaries (including DLLs and Plugins) or DateTime.MaxValue if UnrealHeaderTool does not exist
/// </summary>
/// <returns>
/// Latest timestamp of UHT binaries or DateTime.MaxValue if UnrealHeaderTool is out of date and needs to be rebuilt.
/// </returns>
static bool GetHeaderToolTimestamp(out DateTime Timestamp)
{
using (var TimestampTimer = new ScopedTimer("GetHeaderToolTimestamp"))
{
// Try to read the receipt for UHT.
string ReceiptPath = BuildReceipt.GetDefaultPath(BuildConfiguration.RelativeEnginePath, "UnrealHeaderTool", BuildHostPlatform.Current.Platform, UnrealTargetConfiguration.Development, null);
if (!File.Exists(ReceiptPath))
{
Timestamp = DateTime.MaxValue;
return(false);
}
BuildReceipt Receipt;
try
{
Receipt = BuildReceipt.Read(ReceiptPath);
}
catch (Exception)
{
Timestamp = DateTime.MaxValue;
return(false);
}
Receipt.ExpandPathVariables(BuildConfiguration.RelativeEnginePath, BuildConfiguration.RelativeEnginePath);
// Check all the binaries exist, and that all the DLLs are built against the right version
if (!CheckBinariesExist(Receipt) || !CheckDynamicLibaryVersionsMatch(Receipt))
{
Timestamp = DateTime.MaxValue;
return(false);
}
// Return the timestamp for all the binaries
Timestamp = GetTimestampFromBinaries(Receipt);
return(true);
}
}