/// <summary>
/// Throws ExternalProcessFailureException
/// </summary>
async public Task Wait(ExternalProcess.AsyncTaskDescriptor descriptor)
{
_descriptors.Add(descriptor);
try
{
await descriptor.Task;
}
finally
{
descriptor.Process.Dispose();
_descriptors.Remove(descriptor);
}
}
private void cancelOperation(ExternalProcess.AsyncTaskDescriptor descriptor)
{
if (descriptor == null)
{
return;
}
descriptor.Cancelled = true;
try
{
ExternalProcess.Cancel(descriptor.Process);
}
catch (InvalidOperationException)
{
// process already exited
}
}
async public static Task <bool> DoesEntityExistAtPathAsync(
IExternalProcessManager operationManager, string path, string entity)
{
string arguments = String.Format("cat-file -t {0}", entity);
try
{
ExternalProcess.AsyncTaskDescriptor descriptor =
operationManager?.CreateDescriptor("git", arguments, path, null, null);
if (descriptor == null)
{
return(false);
}
await operationManager.Wait(descriptor);
return(descriptor.StdErr.Count() == 0);
}
catch (Exception) // Exception type does not matter
{
return(false);
}
}
public void Cancel(ExternalProcess.AsyncTaskDescriptor descriptor)
{
cancelOperation(descriptor);
}