How to send buffer to a repl without showing it in prompt?

Question

I'm using nodejs-repl, though the question applies to sending text to any repl.

I'd like to send a buffer to the repl, which I do with C-c C-b, but I don't want the buffer text to show in the prompt.

So instead of this:

> 0 + 1
1
> const seven = require('./seven);
const five = require('./five');
const add = require('./add');

const twelve = add(seven, five);
console.log(twelve);

12
>

I would instead something like see:

> 0 + 1
1
> loaded path/to/file.js
12
> 

The loaded path/to/file.js isn't required, I basically just don't want to see all the buffer text.

I'm new to elisp and so all I can think to do is store the buffer text to a variable and somehow only show that variable (I don't know how to do this though).

Answer 1

This example sends the command to the shell buffer, and displays the results but without displaying the command:

  (let* ((buf (get-buffer "*shell*"))
     (proc (get-buffer-process buf))
     (command "echo hello world\n"))
(comint-send-string proc command)
)

I think the same approach would work with any comint buffer.