text() and other prompts not working when stdin is piped

[henrywood]

Laravel Prompts Version

0.3.3

Laravel Version

11.0

PHP Version

8.2

Operating System & Version

linux ubuntu 22.04

Terminal Application

WSL?

Description

Laravel\Prompts\text() and other functions do not work if something is piped into a process's STDIN pipe (and then read via stream_get_contents(STDIN);

ie

use function Laravel\Prompts\text;

$data = stream_get_contents(STDIN);

$desc = text(   label: 'Description', 
                required: TRUE, 
                placeholder: 'Snippet description',
);

The problem is that NO input field is displayed

If I comment the $data = stream_get_contents(STDIN); line,
the text() works as expected.

Note: I am using laravel/prompts composer package without Laravel !

Steps To Reproduce

use function Laravel\Prompts\text;

$data = stream_get_contents(STDIN);

$desc = text(   label: 'Description', 
                required: TRUE, 
                placeholder: 'Snippet description',
);

[jessarcher]

Hi @henrywood,

I'm not sure it's possible to solve this as Prompts needs the STDIN stream to be a TTY to read the user input.

If you pipe something into the process, then STDIN won't be connected to the terminal input (stream_isatty(STDIN) is false).

Prompts attempts to handle this by switching to non-interactive mode, where default or empty values will be returned instead of rendering. However, your text prompt is marked as required so this should fail with a validation error rather than outputting nothing as you've described.

I note that stream_get_contents(STDIN) is blocking if you don't pipe anything into the process because STDIN will be endless, so no code afterwards will be executed unless you pipe something in that has an end.

[henrywood]

But can't STDIN be reset / closed once it has been read by stream_get_contents(STDIN); ?
such that it appears pristine to Prompts (when hitting the text() call) ?

[jessarcher]

I can't find a way to restore STDIN back to a TTY.

I did find that we can read the TTY directly from /dev/tty instead of STDIN, but I'm not sure how reliable/safe that is. We'd need a new way to detect when Prompts is running in a non-interactive environment (such as CI) so that it doesn't wait for user input that will never come. I'm unsure whether /dev/tty still exists and is readable in those environments.

Example code:

<?php

if (! stream_isatty(STDIN)) {
    $data = stream_get_contents(STDIN, 1024);

    var_dump($data);
}

$stream = fopen('/dev/tty', 'r');

var_dump(stream_isatty($stream));
var_dump(stream_get_contents($stream, 1));

[p-fazzini]

This problem also happens when, for example, calling an external command before printing the field with the text function:

spin(
	message: 'Create the tables...',
	callback: fn () => $this->callSilent('migrate:fresh')
);
$name = text(
	label: 'Insert the admin name',
	default: $name ?? '',
	required: true
);

The strange thing is that the field works, it just doesn't show either the field label or the ui, but if you type in the value it is received