From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: Emacs Modular Configuration: the preferable way. Date: Tue, 22 Jun 2021 03:17:18 +0300 Message-ID: References: <87pmwgdiyj.fsf@zoho.eu> <878s33dvd4.fsf@zoho.eu> <87czsewys6.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10743"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.7+183 (3d24855) (2021-05-28) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Jun 22 02:21:45 2021 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 1lvUAj-0002Ze-2c for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 22 Jun 2021 02:21:45 +0200 Original-Received: from localhost ([::1]:60330 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lvUAh-00049X-AI for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 21 Jun 2021 20:21:43 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50640) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lvUAH-00049K-DT for help-gnu-emacs@gnu.org; Mon, 21 Jun 2021 20:21:17 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:36103) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lvUAF-0004Jb-Kw for help-gnu-emacs@gnu.org; Mon, 21 Jun 2021 20:21:17 -0400 Original-Received: from localhost ([::ffff:197.157.0.61]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000076021.0000000060D12CF8.00002023; Mon, 21 Jun 2021 17:21:12 -0700 Mail-Followup-To: help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: <87czsewys6.fsf@zoho.eu> Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_SORBS_WEB=1.5, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 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:131170 Archived-At: * Emanuel Berg via Users list for the GNU Emacs text editor [2021-06-22 03:04]: > > In some functions it matters if you end filename with > > a slash or not when you work with directories. > > I can imagine the situation but if it should do different > things depending on if it is a directory or a regular file, it > is better for these functions themselves to determine what it > is, and not rely on the user of the function to insert a slash > to denote a directory... (setq file "") ⇒ "" (file-exists-p file) ⇒ t ;; this is funny to me, but I guess both ;; directory and file are files... (file-exists-p "/") ⇒ t ;; aha, directory is file too... Then: (expand-file-name file) ⇒ "/home/data1/protected/tmp" ;; aha, this one is ;; directory, ;; that is why ;; empty string ;; is considered ;; file. (file-name-as-directory "") ⇒ "./" ;; now it makes more sense and now we get it as directory with a slash: (file-name-as-directory (expand-file-name "")) ⇒ "/home/data1/protected/tmp/" (defun directory (file) (when (and (stringp file) (file-exists-p file)) (file-name-as-directory (expand-file-name file)))) (directory "") ⇒ "/home/data1/protected/tmp/" ;; because that is my current directory (directory "/home") ⇒ "/home/" If directory does not exist, return NIL: (directory "/home-is-not-here") ⇒ nil -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/