From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.help Subject: Re: if and only if an Error message Date: Sun, 20 Jul 2014 03:42:20 +0200 Message-ID: <87fvhwx0ub.fsf@web.de> 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> <87lhrpd0wq.fsf@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1405820588 14709 80.91.229.3 (20 Jul 2014 01:43:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 20 Jul 2014 01:43:08 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Jul 20 03:43:00 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 1X8g9T-0004Ul-JW for geh-help-gnu-emacs@m.gmane.org; Sun, 20 Jul 2014 03:42:59 +0200 Original-Received: from localhost ([::1]:56086 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X8g9T-0005yJ-8c for geh-help-gnu-emacs@m.gmane.org; Sat, 19 Jul 2014 21:42:59 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50360) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X8g9D-0005y1-Cu for help-gnu-emacs@gnu.org; Sat, 19 Jul 2014 21:42:49 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X8g97-0004D4-EX for help-gnu-emacs@gnu.org; Sat, 19 Jul 2014 21:42:43 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:52713) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X8g97-0004D0-8d for help-gnu-emacs@gnu.org; Sat, 19 Jul 2014 21:42:37 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1X8g96-00049I-3O for help-gnu-emacs@gnu.org; Sun, 20 Jul 2014 03:42:36 +0200 Original-Received: from dslb-094-217-127-201.pools.arcor-ip.net ([94.217.127.201]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 20 Jul 2014 03:42:36 +0200 Original-Received: from michael_heerdegen by dslb-094-217-127-201.pools.arcor-ip.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 20 Jul 2014 03:42:36 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 59 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: dslb-094-217-127-201.pools.arcor-ip.net User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.92 (gnu/linux) Cancel-Lock: sha1:FEaAZpRar7y0EQ6ncEG9MqJpMIE= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 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:98807 Archived-At: Emanuel Berg writes: > But put it this way: how do I find out a variable isn't > a user option? Yes, C-h v. User options are these variables that can be "customized". > (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) Looks good. Maybe also call `discard-input' as `command-error-default-function' does. And (message "%s" error-str). ^^^^ Have fun, Michael.