bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

[sirgazil]

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:

https://multimedialib.files.wordpress.com/2019/05/emacs-geiser-guile-repl-no-prompt-found-2019-05-13.png

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.


---
https://sirgazil.bitbucket.io/

bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

[Luis Felipe via Bug reports for GNU Guix]

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

bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

[Mekeor Melire]

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

> 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:
>
> https://multimedialib.files.wordpress.com/2019/05/emacs-geiser-guile-repl-no-prompt-found-2019-05-13.png
>
> 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.

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.

bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

[Antonio Carlos Padoan Junior via Bug reports for GNU Guix]

Mekeor Melire <mekeor@posteo.de> writes:

>
> 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.
>

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

bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

[Luis Felipe via Bug reports for GNU Guix]

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Hi Mekeor,

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

> Does it work when you start the Guile REPL with an
> environment-variable called INSIDE_EMACS?

It does, thanks.


> 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.

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

> Personally, I think this is only a bug in Geiser which should be
> able to parse colored prompts.

I just reported this to Geiser:

https://gitlab.com/emacs-geiser/guile/-/issues/26

So I think I'll close this issue.

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bug#35727: Connecting Geiser to Guile listening to a socket: No prompt found! (.guile to blame)

[Luis Felipe via Bug reports for GNU Guix]

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

> Hi Mekeor,
> 

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

> > Does it work when you start the Guile REPL with an
> > environment-variable called INSIDE_EMACS?
> 

> 

> It does, thanks.
> 

> > 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.
> 

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

> > Personally, I think this is only a bug in Geiser which should be
> > able to parse colored prompts.

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



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