From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines in xref.el Date: Thu, 04 Mar 2021 05:36:07 +0200 Message-ID: <83eegvk2u0.fsf@gnu.org> References: <87im69uzlt.fsf@mail.linkov.net> <878s74fv27.fsf@mail.linkov.net> <4119ea3055ef8f306fc0@heytings.org> <4119ea30557ef84ca190@heytings.org> <7eb7ee0f-7dba-c90d-cb58-af42c3828643@yandex.ru> <4119ea30554b406efbbf@heytings.org> <4119ea30558f1e4145b0@heytings.org> <4119ea30555e80bdcf7e@heytings.org> <1c82e582-8b90-f3c5-5391-1e88ca4e7ab2@yandex.ru> <4119ea30553e3f90ab8c@heytings.org> <87y2f42ex5.fsf@mail.linkov.net> <4119ea30552873ab9870@heytings.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10216"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 46859@debbugs.gnu.org, juri@linkov.net To: Gregory Heytings Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Mar 04 04:37:09 2021 Return-path: Envelope-to: geb-bug-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 1lHenV-0002ZJ-J9 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 04 Mar 2021 04:37:09 +0100 Original-Received: from localhost ([::1]:37934 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lHenU-0006dq-5J for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 03 Mar 2021 22:37:08 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:57334) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lHenO-0006de-EH for bug-gnu-emacs@gnu.org; Wed, 03 Mar 2021 22:37:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:45830) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lHenO-0004mw-7D for bug-gnu-emacs@gnu.org; Wed, 03 Mar 2021 22:37:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lHenO-00043d-3c for bug-gnu-emacs@gnu.org; Wed, 03 Mar 2021 22:37:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 04 Mar 2021 03:37:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 46859 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 46859-submit@debbugs.gnu.org id=B46859.161482899615561 (code B ref 46859); Thu, 04 Mar 2021 03:37:02 +0000 Original-Received: (at 46859) by debbugs.gnu.org; 4 Mar 2021 03:36:36 +0000 Original-Received: from localhost ([127.0.0.1]:57376 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lHemx-00042t-P4 for submit@debbugs.gnu.org; Wed, 03 Mar 2021 22:36:35 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:39390) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lHemv-00042h-W9 for 46859@debbugs.gnu.org; Wed, 03 Mar 2021 22:36:34 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:51049) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lHemp-0004eO-6i; Wed, 03 Mar 2021 22:36:27 -0500 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:3603 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lHemo-0002sS-CL; Wed, 03 Mar 2021 22:36:27 -0500 In-Reply-To: <4119ea30552873ab9870@heytings.org> (message from Gregory Heytings on Wed, 03 Mar 2021 20:34:46 +0000) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:201356 Archived-At: > Date: Wed, 03 Mar 2021 20:34:46 +0000 > From: Gregory Heytings > Cc: 46859@debbugs.gnu.org > > > By an option I meant a command line switch of GNU grep, not something > > that looks like a hack. > > It's not a hack at all, it's a command line switch: -o. The amount of > context, which defaults to zero, is given in the regexp instead of as an > argument to the command line switch. > > This -o option has been present since GNU grep 2.5, twenty years ago. > > You can use it together with other options: > > grep -o PATTERN FILE prints the matches > grep -no PATTERN FILE prints the matches and their line number > grep -bo PATTERN FILE prints the matches and their offset > grep -bo '.\{0,BEFORE\}PATTERN.\{0,AFTER\}' FILE prints the matches with a given BEFORE and AFTER context > > and so forth. > > And the -o option is supported by ripgrep, ag and ack, with almost the > same syntax. While you discuss all those possibilities, please be aware that byte offsets have one more problem: converting them to character offsets or columns might not be trivial, especially if the encoding of the file is not UTF-8. (Apologies if you already discussed this.)