Better way to send input to a prompt programatically

I've been using a queue, as described at https://github.com/jonathanslenders/python-prompt-toolkit/issues/519#issuecomment-318978114, to make it so that I can send text to a prompt programatically. For instance, I have a -c startup flag that allows to run a command as the first prompt. I also use this in the bracketed paste handler, as described in that issue.

The way I've done this is to pass items in the command queue through a PipeInput and use that as the input to the cli when there is a queue (and a normal input=None otherwise).

However, I'm not a fan of this approach, because it means that I have to manipulate the input command so that it gets accepted by the cli, for instance, by appending a key code that maps to accept_line.

I would much rather just set the prompt text to the command manually, and have it accept immediately. Is there a way to do this? I basically want to cli.current_buffer.insert_text(command) then have cli.run() bypass the eventloop and do a quick exit.

Start by reading the linked discussion and tracing how PipeInput, cli.current_buffer.insert_text(command), and cli.run() interact with the event loop. Determine whether the existing CLI entry points support inserting a command and accepting it immediately; done means a documented, tested way to run the command without manipulating input with an accept_line key code.