GNU logs - #15775, boring messages

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From: Dmitry Gutov <dgutov@HIDDEN>
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It has been a somewhat common problem with calling external processes
from Emacs. Some references:

http://david.rothlis.net/emacs/customize_general.html#shell

https://github.com/nonsequitur/inf-ruby/issues/33

https://github.com/dgutov/robe/issues/9

The common recommendation is to change the PAGER environment var, and it
works, but why isn't Emacs doing it by default (like with TERM, for
example)?

Can packages just go ahead and set it, without having to leave it to
users? Should they limit the change only to buffers they work with? I
looked at how that could be done with Comint (and a mode deriving from
it), but `make-comint' creates a new buffer, so it's not like I can
change the local value of `process-environment' before the external
process is launched.


In GNU Emacs 24.3.50.3 (x86_64-unknown-linux-gnu, GTK+ Version 3.6.4)
 of 2013-10-30 on axl
Bzr revision: 114852 monnier@HIDDEN
Windowing system distributor `The X.Org Foundation', version 11.0.11303000
System Description:	Ubuntu 13.04

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Subject: bug#15775: Acknowledgement (24.3.50; "WARNING: terminal is not
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merge 15775 4359

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forcemerge 15775 15771

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unmerge 15771

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 Content preview: This change makes "git grep" work as a grep command with `M-x
 grep' (if you remove --null). It's shouldn't have a negative impact on much
 anything else (because no pagers should be used anywhere here) [...] 
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This change makes "git grep" work as a grep command with `M-x grep' (if
you remove --null).  It's shouldn't have a negative impact on much
anything else (because no pagers should be used anywhere here), but
perhaps it should be done in grep.el instead of compile.el...

Anybody got any comments?

diff --git a/lisp/progmodes/compile.el b/lisp/progmodes/compile.el
index 6753cf0b02..c88eb10693 100644
--- a/lisp/progmodes/compile.el
+++ b/lisp/progmodes/compile.el
@@ -1895,6 +1895,9 @@ compilation-start
               (and (derived-mode-p 'comint-mode)
                    (comint-term-environment))
 	      (list (format "INSIDE_EMACS=%s,compile" emacs-version))
+              ;; Some external programs (like "git grep") use a pager;
+              ;; defeat that.
+              (list "PAGER=")
 	      (copy-sequence process-environment))))
         (setq-local compilation-arguments
                     (list command mode name-function highlight-regexp))


-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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 pagers should be used anywhere [...] 
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Lars Ingebrigtsen <larsi@HIDDEN> writes:

> This change makes "git grep" work as a grep command with `M-x grep' (if
> you remove --null).  It's shouldn't have a negative impact on much
> anything else (because no pagers should be used anywhere here), but
> perhaps it should be done in grep.el instead of compile.el...
>
> Anybody got any comments?

[...]

> +              ;; Some external programs (like "git grep") use a pager;
> +              ;; defeat that.
> +              (list "PAGER=")

Nobody had any comments, and it doesn't seem likely that this will
regress anything, so I've now pushed this to Emacs 29.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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On 02.06.2022 16:07, Lars Ingebrigtsen wrote:
> Lars Ingebrigtsen<larsi@HIDDEN>  writes:
> 
>> This change makes "git grep" work as a grep command with `M-x grep' (if
>> you remove --null).  It's shouldn't have a negative impact on much
>> anything else (because no pagers should be used anywhere here), but
>> perhaps it should be done in grep.el instead of compile.el...
>>
>> Anybody got any comments?
> [...]
> 
>> +              ;; Some external programs (like "git grep") use a pager;
>> +              ;; defeat that.
>> +              (list "PAGER=")
> Nobody had any comments, and it doesn't seem likely that this will
> regress anything, so I've now pushed this to Emacs 29.

Hi Lars,

Back when I filed bug#15775, Glenn merged it with bug#4359.

Looks like you are fixing only the latter bug here.

The package I mentioned in the original report, inf-ruby, derives from 
comint-mode.

It doesn't derive from compilation-mode, so the pushed change can't 
affect it or fix the problem there.

N.B.: Even a decade later, I still have

   (setenv "PAGER" (executable-find "cat"))

in my init script.

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Subject: control message for bug #15775
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Message sent to bug-gnu-emacs@HIDDEN:


X-Loop: help-debbugs@HIDDEN
Subject: bug#15775: 24.3.50; "WARNING: terminal is not fully functional" in Comint and Eshell
Resent-From: Lars Ingebrigtsen <larsi@HIDDEN>
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To: Dmitry Gutov <dgutov@HIDDEN>
Cc: schwab@HIDDEN, Ulrich Neumerkel <ulrich@HIDDEN>, Dan Nicolaescu <dann@HIDDEN>, 15775 <at> debbugs.gnu.org, Jan =?UTF-8?Q?Dj=C3=A4rv?= <jan.h.d@HIDDEN>, 4359 <at> debbugs.gnu.org
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From: Lars Ingebrigtsen <larsi@HIDDEN>
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Date: Sun, 05 Jun 2022 16:15:06 +0200
In-Reply-To: <01702a44-ba8b-d1cc-7693-bbfee2c3f0aa@HIDDEN> (Dmitry Gutov's
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 Content preview: Dmitry Gutov <dgutov@HIDDEN> writes: > Back when I filed
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 the latter bug here. Sorry; didn't catch that. I've now unmerged the bug
 reports, and reopened bug#15775. 
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Dmitry Gutov <dgutov@HIDDEN> writes:

> Back when I filed bug#15775, Glenn merged it with bug#4359.
>
> Looks like you are fixing only the latter bug here.

Sorry; didn't catch that.  I've now unmerged the bug reports, and
reopened bug#15775.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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From: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: control message for bug #15775
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tags 15775 - moreinfo
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