From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: if and only if an Error message Date: Sat, 19 Jul 2014 13:48:53 +0200 Organization: Aioe.org NNTP Server Message-ID: <87lhrpd0wq.fsf@debian.uxu> References: <87tx6e2tr1.fsf@gmail.com> <87vbqu1721.fsf@debian.uxu> <871ttijfiy.fsf@web.de> <87k37a1569.fsf@debian.uxu> <87vbqu9fpd.fsf_-_@debian.uxu> <8761iu6l9u.fsf@debian.uxu> <87iomu54xq.fsf@debian.uxu> <87d2d253u1.fsf@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1405770626 5994 80.91.229.3 (19 Jul 2014 11:50:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 19 Jul 2014 11:50:26 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Jul 19 13:50:19 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1X8T9f-0005ps-8a for geh-help-gnu-emacs@m.gmane.org; Sat, 19 Jul 2014 13:50:19 +0200 Original-Received: from localhost ([::1]:53940 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X8T9e-0001So-V8 for geh-help-gnu-emacs@m.gmane.org; Sat, 19 Jul 2014 07:50:18 -0400 Original-Path: usenet.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!news.stack.nl!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 59 Original-NNTP-Posting-Host: SIvZRMPqRkkTHAHL6NkRuw.user.speranza.aioe.org Original-X-Complaints-To: abuse@aioe.org User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:iyFSTlMrM9WNF6aMAgbEc9oiTEE= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:206516 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:98788 Archived-At: Michael Heerdegen writes: > It's not harmful. But it's not a user option, so if > you set its value, you should know what you are doing > and how the flag is used internally. If I had to know what I'm doing nothing would ever be done. Even more so, if I know it, then why do it... But put it this way: how do I find out a variable isn't a user option? > I would start trying something like this ... Thank you! Yes, check this out - (setq error-buffer-name "*Errors*") ;; inhibit the debugger - ;; try this if nothing else: a wonderful thing to not ;; have it hop out over half the screen for something ;; that can be communicated in a few words (setq debug-on-error nil) (setq eval-expression-debug-on-error nil) ;; this does three things, see the comments (defun say-and-log-error (data _ fun) (let*((error-str (format "%S in %S" data fun)) (error-buffer (get-buffer-create error-buffer-name)) (error-win (get-buffer-window error-buffer)) ) (message error-str) ; echo the error message (with-current-buffer error-buffer (goto-char (point-max)) (insert error-str "\n") ) ; log it (if error-win (with-selected-window error-win ; move focus of error window (goto-char (point-max)) ; if available (recenter -1)) ))) ; (is there a better way?) ;; use it instead of the default one (setq command-error-function (lambda (&rest args) (apply #'say-and-log-error args)) ) ;; show the error buffer (defun show-errors () (interactive) (switch-to-buffer (get-buffer-create error-buffer-name)) (goto-char (point-max)) ; the same situation: the last line of data (recenter -1) ) ; should be on the last window line ; whenever possible ; test here: ; (message 'error-as-not-string) -- underground experts united