code: def build_task(self, name):
          
  
          try:
              self._gettask(name).value = (
                  self._gettask(name).task.resolve_and_build())
          except TaskExecutionException as e:
              perror(e.header, indent="+0")
              perror(e.message, indent="+4")
              self._gettask(name).value = e.payload
          except Exception as e:
              perror("error evaluating target '%s' %s" %
                     (name, type(self._gettask(name).task)))
              perror(traceback.format_exc(e), indent='+4')
              self._gettask(name).value = None
  
          self._gettask(name).last_build_time = time.time()
docs: Builds a task by name, resolving any dependencies on the way