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Date: Wed, 12 May 2021 10:36:57 +0200
Cc: PHP internals <internals@lists.php.net>
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Message-ID: <3B7C1AC0-9CC0-4B88-A610-64AB6A364B36@9dev.de>
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To: Nikita Popov <nikita.ppv@gmail.com>
Subject: Re: [PHP-DEV] Disable interactive mode (-a) if readline not available
From: m@9dev.de (Moritz Friedrich)


> Am 12.05.2021 um 10:12 schrieb Nikita Popov <nikita.ppv@gmail.com>:
>=20
> Hi internals,
>=20
> If the readline extension is enabled, PHP provides an interactive =
shell
> under -a. If it is not enabled, it falls back to an "interactive mode"
> (yes, the difference between "interactive shell" and "interactive =
mode" is
> important here). The interactive mode is simply an stdin input, which =
needs
> to be terminated using Ctrl+D. You can only run one script that way.
>=20
> I think the current behavior is quite confusing, because it's really =
not
> obvious that you ended up in this fallback mode (you need to know the
> difference between "shell" and "mode" in the output) and most people
> wouldn't know what to do with it. The latest instance of this is
> https://bugs.php.net/bug.php?id=3D81033.
>=20
> I think we would be better off disabling -a completely if readline is =
not
> available, and exit with a helpful error message. I've opened
> https://github.com/php/php-src/pull/6976 to that effect. Does that =
sound
> reasonable?
>=20
> Regards,
> Nikita

Hi Nikita,
if I may ask, would it also be possible to have deadline as a mandatory=20=

dependency to always have the interactive shell available? Is there a =
good
reason to compile PHP without? Having a basic prompt available is really
handy at times =E2=80=94 especially looking at Node.js with their =
ahead-completion
and general UX.
The same has been done for other PHP modules in the past, so I wonder if=20=

we could simply have readline as a guarantee.

Regards,
Moritz=