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Subject: bug#51454: Progress bar in Org source blocks
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I'm trying to document my work with Guix using Emacs Org. If I run a shell/=
sh/bash source block in org-mode, the result has control characters in it.

To reproduce, open a clean instance of Emacs with emacs -q, switch to the s=
cratch buffer and insert:

;; eval this first so that source blocks can run sh
(org-babel-do-load-languages
=C2=A0'org-babel-load-languages
=C2=A0'((shell . t)))

#+begin_src sh :results output :session test
guix package -u
#+end_src

#+RESULTS:
: guix package: =1B[1;35mwarning: =1B[0mnothing to do

Switch to org-mode, eval the lisp, and C-c C-c the source block. If your sy=
stem is like mine, you'll see control non-printable characters.

When I check how org sees the shell, I get:

#+begin_src sh :results output :session test
echo $TERM
#+end_src

#+RESULTS:
: dumb

I've tried renaming .bashrc and .bash_profile to .bashrc.old and .bash_prof=
ile.old, starting a new shell and running through the steps above. The resu=
lt is the same.

Thoughts and suggestions?

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: excalamus@HIDDEN
Subject: bug#51454: Acknowledgement (Progress bar in Org source blocks)
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Date: Thu, 28 Oct 2021 06:47:02 +0000

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Subject: bug#51454: Progress bar in Org source blocks
Resent-From: zimoun <zimon.toutoune@HIDDEN>
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Hi,

On Fri, 29 Oct 2021 at 14:38, excalamus--- via Bug reports for GNU
Guix <bug-guix@HIDDEN> wrote:

> I'm trying to document my work with Guix using Emacs Org. If I run a shell/sh/bash source block in org-mode, the result has control characters in it.

[...]

> #+RESULTS:
> : guix package:  [1;35mwarning:  [0mnothing to do
>
> Switch to org-mode, eval the lisp, and C-c C-c the source block. If your system is like mine, you'll see control non-printable characters.

You should try the environment variable INSIDE_EMACS with turns off
some fancy shell things.

Cheers,
simon

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Subject: bug#51454: Progress bar in Org source blocks
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> try the environment variable INSIDE_EMACS with turns off
> some fancy shell things.
>
This is a good suggestion.=C2=A0 Maybe I'm misunderstanding how INSIDE_EMAC=
S works. The docs say:

"Emacs sets the environment variable INSIDE_EMACS in thesubshell to =E2=80=
=98version,comint=E2=80=99, where version is theEmacs version (e.g., =E2=80=
=9824.1=E2=80=99).  Programs can check this variableto determine whether th=
ey are running inside an Emacs subshell."

https://www.gnu.org/software/emacs/manual/html_node/emacs/Interactive-Shell=
.html

When I check it in a session set up as described above, I get the Emacs ver=
sion:

#+begin_src sh :results output :session unset
echo $INSIDE_EMACS
#+end_src

#+RESULTS:
:=20
: 27.2,comint

I understand this to mean that INSIDE_EMACS *is* being set and that it's th=
e guix command's responsibility to do something with it (if it wants to).

If instead I set INSIDE_EMACS to something falsey (e.g. 1) and run through =
things, I see the same result with color and control characters.

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Subject: bug#51454: Progress bar in Org source blocks
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Hi,

On Sat, 30 Oct 2021 at 06:55, excalamus@HIDDEN wrote:
>> try the environment variable INSIDE_EMACS with turns off
>> some fancy shell things.
>>
> This is a good suggestion.=C2=A0 Maybe I'm misunderstanding how
> INSIDE_EMACS works. The docs say:

Thanks for the pointing the Emacs doc.  From my understanding, the
environment variable INSIDE_EMACS is used by Guix to turn on/off
hyperlink support.  It reads,

--8<---------------cut here---------------start------------->8---
(define* (supports-hyperlinks? #:optional (port (current-output-port)))
  "Return true if PORT is a terminal that supports hyperlink escapes."
  ;; Note that terminals are supposed to ignore OSC escapes they don't
  ;; understand (this is the case of xterm as of version 349, for instance.)
  ;; However, Emacs comint as of 26.3 does not ignore it and instead lets it
  ;; through, hence the 'INSIDE_EMACS' special case below.
  (and (isatty?* port)
       (not (getenv "INSIDE_EMACS"))))
--8<---------------cut here---------------end--------------->8---

> "Emacs sets the environment variable INSIDE_EMACS in thesubshell to
> =E2=80=98version,comint=E2=80=99, where version is the Emacs version (e.g=
., =E2=80=9824.1=E2=80=99).
> Programs can check this variableto determine whether they are running
> inside an Emacs subshell."

Indeed, Emacs sets automatically this variable.  That=E2=80=99s why it is u=
sed
by Guix. :-)


> I understand this to mean that INSIDE_EMACS *is* being set and that
> it's the guix command's responsibility to do something with it (if it
> wants to).

Yes.


> If instead I set INSIDE_EMACS to something falsey (e.g. 1) and run
> through things, I see the same result with color and control
> characters.

Thanks for reporting. I though tweaking that variable would be enough to
fix the odd behaviour you are seeing,

--8<---------------cut here---------------start------------->8---
: guix package: [1;35mwarning: [0mnothing to do
--8<---------------cut here---------------end--------------->8---

which are related to shell fancy =E2=80=9Ccontrollers=E2=80=9D.  If you hav=
e not tried
yet, then NO_COLOR=3D1 should do the job.  Sorry to not have thought
before. :-)


Cheers,
simon

Last modified: Sat, 30 Oct 2021 16:45:02 UTC

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