From: Arthur Miller <arthur.miller@live.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: michael.albinus@gmx.de, arstoffel@gmail.com,
monnier@iro.umontreal.ca, emacs-devel@gnu.org
Subject: Re: [PATCH] Buffer-local process environments
Date: Sat, 28 Aug 2021 17:27:18 +0200 [thread overview]
Message-ID: <AM9PR09MB4977BC02912D4917099C527596C99@AM9PR09MB4977.eurprd09.prod.outlook.com> (raw)
In-Reply-To: <83zgt1myf5.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 28 Aug 2021 17:33:34 +0300")
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Arthur Miller <arthur.miller@live.com>
>> Cc: Augusto Stoffel <arstoffel@gmail.com>, michael.albinus@gmx.de,
>> monnier@iro.umontreal.ca, emacs-devel@gnu.org
>> Date: Sat, 28 Aug 2021 16:06:19 +0200
>>
>> > And I'm not sure I understand the rationale, and you didn't describe
>> > it. Environment variables and PATH in particular are generally global
>> > on the entire system, so what does this feature correspond to?
>> > separate environment variables in each shell window? Why would anyone
>> > want to do that? And why should we make it easier by providing
>> > buffer-local values of those, instead of letting each Lisp program
>> > that needs it let-bind the variables instead?
>>
>> Excuse me if I ask here, it is probably more help than contribution to this
>> discussion. Is it possible to let-bind environment variables so that a
>> subprocess inherit those?
>
> Of course. You let-bind process-environment, and then change the
> local value. We have a number of places where we do that.
Ah, ok, I thought it process-environment was for entire Emacs, globally. I just
was looking at docs, I haven't seen examples in the code. Thanks.
>> (defun emacs-vision--get-date ()
>> (let ((lang (concat "LANG=" emacs-vision-locale))
>> (lctime (concat "LC_TIME=" emacs-vision-locale)))
>> (with-temp-buffer
>> (insert
>> (shell-command-to-string
>> (concat lang lctime " date +'%A, %B %d'")))
>> (goto-char (- (point-max) 1))
>> (buffer-substring-no-properties
>> (line-beginning-position) (line-end-position)))))
>>
>> Do I understand correctly, this patch will let me have separate process
>> environment, so I could use separate environment variables in subprocess?
>
> Yes, but that's not what you were asking about, I believe.
Now you make me confused again :). I want my process to use different env for
LANG and LC_TIME, but Emacs should continue to work with old values. Concretely
I want english date string, but my Emacs should continue to use swedish for it's
normal use.
So if I let-bind, it will be reflected only localy in that let scope, and the
subprocess will inherit that local environment too? That is what I want, and why
I went via shell command. Forgive me if I am confused. I hope what you said
above is what I want :-).
next prev parent reply other threads:[~2021-08-28 15:27 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-29 10:56 Buffer-local process environments Augusto Stoffel
2021-04-29 12:30 ` Eli Zaretskii
2021-04-29 12:40 ` Augusto Stoffel
2021-04-29 12:52 ` Eli Zaretskii
2021-04-29 13:06 ` Augusto Stoffel
2021-04-29 14:02 ` Stefan Monnier
2021-04-29 17:26 ` Augusto Stoffel
2021-04-29 17:34 ` Michael Albinus
2021-04-30 7:29 ` Augusto Stoffel
2021-04-30 7:48 ` Michael Albinus
2021-04-30 15:19 ` Augusto Stoffel
2021-04-30 15:51 ` Michael Albinus
2021-05-02 6:13 ` Augusto Stoffel
2021-05-08 17:51 ` Michael Albinus
2021-05-09 5:06 ` Augusto Stoffel
2021-05-09 16:38 ` Michael Albinus
2021-08-28 12:28 ` [PATCH] " Augusto Stoffel
2021-08-28 12:37 ` Eli Zaretskii
2021-08-28 12:55 ` Augusto Stoffel
2021-09-01 10:42 ` Stephen Leake
2021-09-01 10:56 ` Augusto Stoffel
2021-09-01 22:38 ` Stephen Leake
2021-09-02 7:14 ` Augusto Stoffel
2021-09-06 15:17 ` Stephen Leake
2021-08-28 14:06 ` Arthur Miller
2021-08-28 14:33 ` Eli Zaretskii
2021-08-28 15:27 ` Arthur Miller [this message]
2021-08-28 15:38 ` Eli Zaretskii
2021-08-28 16:48 ` Arthur Miller
2021-08-28 15:39 ` Augusto Stoffel
2021-08-28 16:43 ` Arthur Miller
2021-08-28 12:47 ` Michael Albinus
2021-08-28 12:59 ` Augusto Stoffel
2021-08-28 13:18 ` Michael Albinus
2021-08-28 13:54 ` Augusto Stoffel
2021-08-28 14:05 ` Stefan Monnier
2021-08-28 15:19 ` Augusto Stoffel
2021-04-30 15:32 ` Augusto Stoffel
2021-04-30 15:55 ` Michael Albinus
2021-04-29 15:37 ` Michael Albinus
2021-04-29 17:31 ` Augusto Stoffel
2021-04-29 17:44 ` Michael Albinus
2021-04-30 7:00 ` Augusto Stoffel
2021-04-30 7:25 ` Michael Albinus
2021-05-02 13:45 ` Stephen Leake
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