unofficial mirror of help-gnu-emacs@gnu.org
 help / color / mirror / Atom feed
From: mail@xuchunyang.me
To: Kaushal Modi <kaushal.modi@gmail.com>,
	Help Gnu Emacs mailing list <help-gnu-emacs@gnu.org>
Subject: Re: How to post-process the buffer populated by the async `start-process'
Date: Sat, 12 Jan 2019 14:32:09 +0800	[thread overview]
Message-ID: <4191547274729@myt1-8f46c049cd43.qloud-c.yandex.net> (raw)
In-Reply-To: <CAFyQvY3a4y+u2V==e17e_Lxu9z5pm9JODQY9kfPLdeD-EWEoRg@mail.gmail.com>



12.01.2019, 11:36, "Kaushal Modi" <kaushal.modi@gmail.com>:
> Hello,
>
> I am using a package which starts a command in a subprocess (async) using
> `start-process' and the results of the command are dumped in the buffer arg
> passed to subprocess.
>
> But the stdout sent to the buffer has ANSI escape codes.
>
> If I manually visit that buffer, and eval (ansi-color-apply-on-region-int
> (point-min) (point-max)), I can see the ANSI color codes nicely rendered.
>
> But I cannot figure out how to do that *when* the start-process initiated
> command ends *in* the specified stdout buffer.
>
> If I do:
>
> (apply #'start-process ..)
> (with-current-buffer buffer
>   (ansi-color-apply-on-region-int (point-min) (point-max)) )
>
> .. it of course doesn't work because the a-c-a-o-r-i is getting called
> before start-process initiated command ends.
>
> So I somehow need to define a hook that can get triggered when that command
> ends, and then call the a-c-a-o-r-i function. But I don't know how.

Have you tried (info "(elisp) Sentinels")? The info already provides a nice example, here is another example:

(set-process-sentinel
 (start-process "sleep" "*sleep*" "sleep" "3")
 (lambda (_process event)
   (when (string= event "finished\n")
     (message "TODO Do something"))))

> --
> Kaushal Modi



  reply	other threads:[~2019-01-12  6:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-12  3:34 How to post-process the buffer populated by the async `start-process' Kaushal Modi
2019-01-12  6:32 ` mail [this message]
2019-01-12 16:10   ` Kaushal Modi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4191547274729@myt1-8f46c049cd43.qloud-c.yandex.net \
    --to=mail@xuchunyang.me \
    --cc=help-gnu-emacs@gnu.org \
    --cc=kaushal.modi@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).