Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

Hi,

I'm getting a "No prompt found!" error when I try to connect Geiser to a Guile REPL like this:

1. In a terminal, run "$ guile --listen=/tmp/guile-socket"

2. In Emacs, "M-x geiser-connect-local", then "guile", and finally "/tmp/guile-socket"

When the Guile REPL start in Emacs, I get a "No prompt found!" in the echo area, and the prompt in the REPL looks like this:

After trying some things out with help from str1ngs on #guix, we found out that the problem is related to the ".guile" file that seems to be generated by the system by default. In my case, ".guile" looks like this:

##########

(cond ((false-if-exception (resolve-interface '(ice-9 readline)))

=>

(lambda (module)

;; Enable completion and input history at the REPL.

((module-ref module 'activate-readline))))

(else

(display "Consider installing the 'guile-readline' package for

convenient interactive line editing and input history.\n\n")))

(unless (getenv "INSIDE_EMACS")

(cond ((false-if-exception (resolve-interface '(ice-9 colorized)))

=>

(lambda (module)

;; Enable completion and input history at the REPL.

((module-ref module 'activate-colorized))))

(else

(display "Consider installing the 'guile-colorized' package

for a colorful Guile experience.\n\n"))))

##########

When I remove this file and try to connect again, the "No prompt found!" error disappears, and the prompt looks normal.

## System information

$ guix describe

Generation 1 May 06 2019 11:29:00 (current)

guix d6a68e9

repository URL: https://git.savannah.gnu.org/git/guix.git

branch: master

commit: d6a68e90483b35bdc2ea78afe2c81873be67ec95

I'm using Emacs 26.2, Geiser 0.10, and Guile 2.2.4, all installed as Guix packages.

---

Hi, just to comment that this bug persists in the Guix System I'm using, with:

guix 08d8c2d

guile 3.0.4

emacs 27.1

geiser 0.12

2019-05-14 06:17 sirgazil@zoho.com:

Does it work when you start the Guile REPL with an

environment-variable called INSIDE_EMACS? That way, it worked fine

for me:

#+begin_src sh

INSIDE_EMACS=true guix repl --listen=tcp:37146

#+end_src

If this works, then I'd suggest that this is not a bug but rather

you got to know that you need to deliver that environment variable

to guix/guile. We could then close this ticket.

Personally, I think this is only a bug in Geiser which should be

able to parse colored prompts.

Mekeor Melire <mekeor@posteo.de> writes:

My feedback:

using INSIDE_EMACS=true works as well as starting guix repl from eshell.

Best regards,

--

Antonio Carlos PADOAN JUNIOR

GPG fingerprint:

243F 237F 2DD3 4DCA 4EA3 1341 2481 90F9 B421 A6C9

Hi Mekeor,

On Monday, December 12th, 2022 at 13:32, Mekeor Melire <mekeor@posteo.de> wrote:

It does, thanks.

I'm not sure what would be the right place to document that tho...

I just reported this to Geiser:

So I think I'll close this issue.

On Thursday, January 12th, 2023 at 17:32, Luis Felipe <luis.felipe.la@protonmail.com> wrote:

Well, it turns out it is not:

«geiser guile is intended to work without extra .guile settings. my guess is that your .guile is possibly altering the looks of the prompt, that is explicitly not supported by geiser.» — jaor, https://gitlab.com/emacs-geiser/guile/-/issues/26