guile-readline bug -- readline module not available

guile-readline bug -- readline module not available

[Josh Marshall]

Hello all,

I ran into an issue where the readline module isn't available for the
guile repl after installing `guile-readline`.  It can be replicated
via:

`echo "(use-modules (ice-9 readline))" | guix environment --pure guile
guile-readline -- guile`

So with that, I'm pretty sure it isn't just me.

Re: guile-readline bug -- readline module not available

[Jack Hill]

On Fri, 12 Jun 2020, Josh Marshall wrote:

> Hello all,
>
> I ran into an issue where the readline module isn't available for the
> guile repl after installing `guile-readline`.  It can be replicated
> via:
>
> `echo "(use-modules (ice-9 readline))" | guix environment --pure guile
> guile-readline -- guile`
>
> So with that, I'm pretty sure it isn't just me.

I think you actually want to be using a different guix environment 
command.

guix environment --pure --ad-hoc guile guile-readline

should get you what you want. The difference is that without --ad-hoc, 
what you're asking for is an environment with all the dependencies of 
guile and guile-readline. This is useful, for instance, if you want to 
work on those packages. In this case, guile is available because 
guile-readline depends on it, but nothing depends on guile-readline, so it 
is not in the environment.

With --ad-hoc, you specify the the packages you want in the environment 
explicitly.

See the manual [0] for more information and more advanced usage of 
environment.

[0] https://guix.gnu.org/manual/en/html_node/Invoking-guix-environment.html

This isn't the first time the --ad-hoc has caused confusion. I tend to use 
that option more often than not. There was previous discussion [1] about 
making environment more friendly to use interactively without breaking 
compatibility, but more work is still needed on that front.

[1] https://lists.gnu.org/archive/html/guix-devel/2019-12/msg00126.html

Hope that helps,
Jack

Re: guile-readline bug -- readline module not available

[Josh Marshall]

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The thing is that I want those dependencies in order to illustrate the bug
that the readline module for guile is not available.

On Sat, Jun 13, 2020, 00:11 Jack Hill <jackhill@jackhill.us> wrote:

> On Fri, 12 Jun 2020, Josh Marshall wrote:
>
> > Hello all,
> >
> > I ran into an issue where the readline module isn't available for the
> > guile repl after installing `guile-readline`.  It can be replicated
> > via:
> >
> > `echo "(use-modules (ice-9 readline))" | guix environment --pure guile
> > guile-readline -- guile`
> >
> > So with that, I'm pretty sure it isn't just me.
>
> I think you actually want to be using a different guix environment
> command.
>
> guix environment --pure --ad-hoc guile guile-readline
>
> should get you what you want. The difference is that without --ad-hoc,
> what you're asking for is an environment with all the dependencies of
> guile and guile-readline. This is useful, for instance, if you want to
> work on those packages. In this case, guile is available because
> guile-readline depends on it, but nothing depends on guile-readline, so it
> is not in the environment.
>
> With --ad-hoc, you specify the the packages you want in the environment
> explicitly.
>
> See the manual [0] for more information and more advanced usage of
> environment.
>
> [0]
> https://guix.gnu.org/manual/en/html_node/Invoking-guix-environment.html
>
> This isn't the first time the --ad-hoc has caused confusion. I tend to use
> that option more often than not. There was previous discussion [1] about
> making environment more friendly to use interactively without breaking
> compatibility, but more work is still needed on that front.
>
> [1] https://lists.gnu.org/archive/html/guix-devel/2019-12/msg00126.html
>
> Hope that helps,
> Jack
>

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Re: guile-readline bug -- readline module not available

[Jack Hill]

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On Sat, 13 Jun 2020, Josh Marshall wrote:

> The thing is that I want those dependencies in order to illustrate the bug that the readline module for guile is not available. 

In that case, I think you can get what you want with

guix environment --pure guile guile-readline --ad-hoc guile-readline

However, I'm beginning to think that I don't userstand your question. Can 
you try asking again or perhaps someone else who sees what I'm missing can 
answer.

Best,
Jack

Re: guile-readline bug -- readline module not available

[Marius Bakke]

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Josh Marshall <joshua.r.marshall.1991@gmail.com> writes:

> Hello all,
>
> I ran into an issue where the readline module isn't available for the
> guile repl after installing `guile-readline`.  It can be replicated
> via:
>
> `echo "(use-modules (ice-9 readline))" | guix environment --pure guile
> guile-readline -- guile`
>
> So with that, I'm pretty sure it isn't just me.

This is on a foreign distribution, right?

The '.guile' on Guix System has a trick that automatically loads
readline when available:

--8<---------------cut here---------------start------------->8---
$ cat ~/.guile
(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")))
--8<---------------cut here---------------end--------------->8---

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Re: guile-readline bug -- readline module not available

[Josh Marshall]

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Correct.  Moved, new job, and other stuff came up so I had to drop guix
participation for a bit.  Not ready to pick it back up yet.

On Sat, Jul 25, 2020, 10:56 Marius Bakke <marius@gnu.org> wrote:

> Josh Marshall <joshua.r.marshall.1991@gmail.com> writes:
>
> > Hello all,
> >
> > I ran into an issue where the readline module isn't available for the
> > guile repl after installing `guile-readline`.  It can be replicated
> > via:
> >
> > `echo "(use-modules (ice-9 readline))" | guix environment --pure guile
> > guile-readline -- guile`
> >
> > So with that, I'm pretty sure it isn't just me.
>
> This is on a foreign distribution, right?
>
> The '.guile' on Guix System has a trick that automatically loads
> readline when available:
>
> --8<---------------cut here---------------start------------->8---
> $ cat ~/.guile
> (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")))
> --8<---------------cut here---------------end--------------->8---
>

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