public async ThreadingTasks.Task <string> ProcessTemplateAsync(string inputFilename, string content, ITextTemplatingCallback callback, object hierarchy, bool debugging = false)
{
if (this is ITextTemplatingComponents Component)
{
Component.Hierarchy = hierarchy;
Component.Callback = callback;
Component.TemplateFile = inputFilename;
LastInvocationRaisedErrors = false;
Component.Host.SetFileExtension(SearchForLanguage(content, "C#") ? ".cs" : ".vb");
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
try
{
try
{
runFactory = await GetTransformationRunFactoryAsync(subSonicOutput.GetOutputTextWriter(), SubSonicCoreVisualStudioAsyncPackage.Singleton.CancellationTokenSource.Token);
}
catch (Exception ex)
{
await LogErrorAsync(string.Format(CultureInfo.CurrentCulture, SubSonicCoreErrors.ExceptionStartingRunFactoryProcess, ex), new Location(inputFilename));
runFactory = null;
}
if (runFactory == null)
{
await LogErrorAsync(SubSonicCoreErrors.ErrorStartingRunFactoryProcess, new Location(TemplateFile));
if (debugging)
{
ProcessTemplateEventArgs args = new ProcessTemplateEventArgs
{
TemplateOutput = SubSonicCoreErrors.DebugErrorOutput,
Succeeded = false
};
this.OnTransformProcessCompleted(args);
}
return(SubSonicCoreErrors.DebugErrorOutput);
}
if (!SubSonicCoreVisualStudioAsyncPackage.Singleton.CancellationTokenSource.IsCancellationRequested)
{ // we have not been cancelled so let's continue
// we need to prepare the transformation and send the important parts over to the T4 Host Process
if (Engine.PrepareTransformationRunner(content, Component.Host, runFactory, debugging) is IProcessTransformationRunner runner)
{
if (!debugging)
{ // if we are not debugging we can wait for the process to finish
// and we do not need to attach to the host process.
try
{
if (runFactory.StartTransformation(runner.RunnerId) is TextTemplatingCallback result)
{
if (result.Errors.HasErrors)
{
Callback.Errors.AddRange(result.Errors);
foreach (var templateError in result.Errors)
{
await LogErrorAsync(templateError.Message, templateError.Location, templateError.IsWarning);
}
}
Component.Callback.SetFileExtension(result.Extension);
return(result.TemplateOutput);
}
else if (runFactory.GetErrors(runner.RunnerId) is TemplateErrorCollection errors)
{
Callback.Errors.AddRange(errors);
foreach (var templateError in errors)
{
await LogErrorAsync(templateError.Message, templateError.Location, templateError.IsWarning);
}
}
}
catch (Exception ex)
{
if (TemplatingEngine.IsCriticalException(ex))
{
throw;
}
await LogErrorAsync(ex.ToString(), new Location(Host.TemplateFile));
}
finally
{
runFactory.DisposeOfRunner(runner.RunnerId); // clean up the runner
}
}
else
{ // when debugging this we will attach to the process
// the ui thread will be waiting for a callback from process to complete generation of file.
bool success = false;
try
{
foreach (EnvDTE.Process process in package.DTE.Debugger.LocalProcesses)
{
if (process.ProcessID == (this.transformProcess?.Id ?? default))
{
process.Attach();
success = true;
break;
}
}
}
catch (Exception attachException)
{
await LogErrorAsync(string.Format(CultureInfo.CurrentCulture, SubSonicCoreErrors.ExceptionAttachingToRunFactoryProcess, attachException), new Location(inputFilename));
}
if (success)
{
Dispatcher uiDispatcher = Dispatcher.CurrentDispatcher;
this.debugThread = new Thread(() => StartTransformation(inputFilename, runner, uiDispatcher));
this.debugThread.Start();
}
else
{
await LogErrorAsync(SubSonicCoreErrors.ErrorAttachingToRunFactoryProcess, new Location(inputFilename));
ProcessTemplateEventArgs args = new ProcessTemplateEventArgs
{
TemplateOutput = SubSonicCoreErrors.DebugErrorOutput,
Succeeded = false
};
this.OnTransformProcessCompleted(args);
}
}
}
else
{
ProcessTemplateEventArgs args = new ProcessTemplateEventArgs();
if (debugging)
{
args.TemplateOutput = SubSonicCoreErrors.DebugErrorOutput;
args.Succeeded = false;
this.OnTransformProcessCompleted(args);
}
await LogErrorsAsync(transformationHost.Errors.ToCompilerErrorCollection());
}
}
}
catch (IOException)
{
if (transformProcess != null)
{
try
{
transformProcess.Kill();
}
catch (Exception)
{ }
finally
{
transformProcess = null;
}
}
RemotingServices.Disconnect(new Uri($"ipc://{TransformationRunFactory.TransformationRunFactoryService}"));
}
}
return(SubSonicCoreErrors.DebugErrorOutput);
}