private async void OnStart()
{
output.WriteSplash();
while (true)
{
historyProvider.Reset();
output.WriteScopeBegin(hostEnv);
string command = hostInput.ReadCommandLine();
if (command == null)
{
break;
}
IInputCollection inputCollection = Input.Internal.Input.Parse(command);
if (inputCollection.ContainsError)
{
output.WriteError(inputCollection.ErrorMessage);
}
else
{
foreach (var desc in pool.GetDescriptors())
{
desc.EnterScope();
}
object inputObject = null;
int index = 0;
int changeIndex = inputCollection.Inputs.Count - 1;
bool isInPipe = inputCollection.Inputs.Count > 1;
bool writeDefaultValue = !isInPipe;
HostContext context = null;
foreach (IInput input in inputCollection.Inputs)
{
context = new HostContext(input, inputObject, isInPipe, index, writeDefaultValue);
AppDelegate app = appBuilder.Build();
await app(context);
if (context.ErrorOccured)
{
output.WriteError(context.Exception);
break;
}
if (context.WriteResult)
{
output.WriteObject(context.Result);
}
inputObject = context.Result;
if (inputObject != null)
{
inputObject = ObjectHelper.TryGetValue(inputObject);
}
index++;
if (index >= changeIndex)
{
writeDefaultValue = true;
}
}
foreach (var desc in pool.GetDescriptors())
{
desc.LeaveScope();
}
}
historyProvider.Add(inputCollection.Raw);
}
}
