From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: ask for help Date: Tue, 19 Apr 2022 13:40:20 +0200 Message-ID: <87pmlduwrf.fsf@zoho.eu> References: <871qxtco1o.fsf@ruanxiang.net> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12745"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:svfFZaMlwhTMbAhANUuvPgrROT4= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Wed Apr 20 18:47:56 2022 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nhDUi-0002z9-IW for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 20 Apr 2022 18:47:56 +0200 Original-Received: from localhost ([::1]:41460 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nhDUh-0004BY-7X for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 20 Apr 2022 12:47:55 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39662) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ngmDj-000154-Ea for help-gnu-emacs@gnu.org; Tue, 19 Apr 2022 07:40:35 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:59554) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ngmDh-0006zF-N4 for help-gnu-emacs@gnu.org; Tue, 19 Apr 2022 07:40:35 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1ngmDb-0008NI-Ju for help-gnu-emacs@gnu.org; Tue, 19 Apr 2022 13:40:27 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Wed, 20 Apr 2022 12:24:51 -0400 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:136974 Archived-At: Xiang Ruan wrote: > I am not familiar with emacs-lisp programming, I just wonder > if this list could give me some advice on how to implement > the below functionality. > > Suppose I invoke a commend "a" in a buffer, then the buffer > may have a name with "a". I want to keep watching a specific > file on my system, let's say, a file of "/data/b". > When /data/b changes, I want emacs to automatically update > or re-invoke "a" again in the same buffer "a" without catch > my focus when I am working on other buffers. > > My question is, is it possible to implement it? If it is > possible, can anybody suggest me a simple example ? It is usually better to do it when it is needed, not when it changes. If it has to happen when it changes I don't know any other way than to poll it constantly? -- underground experts united https://dataswamp.org/~incal