GNU bug report logs - #15658
24.1; (wishlist) Easy way to make a file-local variable also permanent-local

Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.

Package: emacs; Severity: wishlist; Reported by: yary <not.com@HIDDEN>; dated Sat, 19 Oct 2013 22:16:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

Message received at submit <at> debbugs.gnu.org:


Received: (at submit) by debbugs.gnu.org; 19 Oct 2013 22:15:37 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Sat Oct 19 18:15:37 2013
Received: from localhost ([127.0.0.1]:58325 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.80)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1VXeo4-0002Ow-GV
	for submit <at> debbugs.gnu.org; Sat, 19 Oct 2013 18:15:36 -0400
Received: from eggs.gnu.org ([208.118.235.92]:35153)
 by debbugs.gnu.org with esmtp (Exim 4.80)
 (envelope-from <not.com@HIDDEN>) id 1VXeo1-0002Oe-SX
 for submit <at> debbugs.gnu.org; Sat, 19 Oct 2013 18:15:34 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <not.com@HIDDEN>) id 1VXenv-0001uZ-I1
 for submit <at> debbugs.gnu.org; Sat, 19 Oct 2013 18:15:28 -0400
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,FREEMAIL_FROM,
 T_DKIM_INVALID autolearn=disabled version=3.3.2
Received: from lists.gnu.org ([2001:4830:134:3::11]:52250)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <not.com@HIDDEN>) id 1VXenv-0001uV-F9
 for submit <at> debbugs.gnu.org; Sat, 19 Oct 2013 18:15:27 -0400
Received: from eggs.gnu.org ([2001:4830:134:3::10]:36875)
 by lists.gnu.org with esmtp (Exim 4.71)
 (envelope-from <not.com@HIDDEN>) id 1VXenu-0007xr-FF
 for bug-gnu-emacs@HIDDEN; Sat, 19 Oct 2013 18:15:27 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <not.com@HIDDEN>) id 1VXent-0001uJ-F7
 for bug-gnu-emacs@HIDDEN; Sat, 19 Oct 2013 18:15:26 -0400
Received: from mail-wg0-x22c.google.com ([2a00:1450:400c:c00::22c]:49759)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <not.com@HIDDEN>) id 1VXent-0001uF-8d
 for bug-gnu-emacs@HIDDEN; Sat, 19 Oct 2013 18:15:25 -0400
Received: by mail-wg0-f44.google.com with SMTP id n12so5041340wgh.11
 for <bug-gnu-emacs@HIDDEN>; Sat, 19 Oct 2013 15:15:24 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:from:date:message-id:subject:to:content-type;
 bh=U0g40BmP64sljBfK56AfeVD4+FK5YU1h9YXpvPtbknU=;
 b=jZ0wQh3yG0lEO0TwTp8fxlh9HYj8l74g1XCFE0iw8W9+um9oWJ/7sUNnXhIxYYtv5Q
 bZcEu9aDZGrgNmQsE8wTcaCLDdywc2LGur4n8K3V6T3KL1la/ULzQuM/JDOW0TjRHxOF
 2VJTXyL7hOZ5ZchgIEi+AdS7i6PLe23irbhdO5GXy05daMqmX7L8y/mSlnI0xwkMew/F
 Zu41KpP7TkWCLSKeOSFqPKOJuPUSLB2QBmhSxyTP9bjbxoGy0G45PcAq3P8NfYsPB1sI
 8fGDAutb36PRmAoT+havKDHGfXZc470J/PaBpMsxqtwo+RK8rVrayFJHE7MNuYNIfywM
 BTkw==
X-Received: by 10.180.189.132 with SMTP id gi4mr4236302wic.19.1382220924459;
 Sat, 19 Oct 2013 15:15:24 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.194.83.72 with HTTP; Sat, 19 Oct 2013 15:15:04 -0700 (PDT)
From: yary <not.com@HIDDEN>
Date: Sat, 19 Oct 2013 18:15:04 -0400
Message-ID: <CAG2CFAZfn2TH5KeSxoYvKyh71-49BB3Ho35YLp3XpQsRE=DXLQ@HIDDEN>
Subject: 24.1; (wishlist) Easy way to make a file-local variable also
 permanent-local
To: bug-gnu-emacs@HIDDEN
Content-Type: text/plain; charset=ISO-8859-1
X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address
 (bad octet value).
X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address
 (bad octet value).
X-Received-From: 2001:4830:134:3::11
X-Spam-Score: -4.0 (----)
X-Debbugs-Envelope-To: submit
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -4.0 (----)

There are occasional needs to preserve buffer-local variables across
major-mode changes. In the specific case of directory-local variables,
an automated solution looks to be feasible, see "bug#15577: 24.3;
dir-local variables not applied when switching major-mode"

File-local variables on the other hand are not as easy to categorize as
to their intent- for a particular mode, vs the file contents in general.

I propose adding `permanent' as another special "variable name" (along
the lines of `mode', `eval', `coding', and `unibyte') to let people
mark the file variables they want to remain between mode changes. For
example:

; mode: Lisp
; fill-column: 75
; comment-column: 50
; permanent: fill-column tab-width

would set & keep fill-column at 75 between mode changes, and would
preserve between major-mode switches any changes to tab-width.

(There is one edge case with this proposal: what would `permanent: eval'
do? Re-evaluate all `eval' file variables after a mode change? And
`permanent: mode' would have to be ignored or give a warning.)


In GNU Emacs 24.1.1 (i386-mingw-nt5.1.2600)
 of 2012-06-10 on MARVIN
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --with-gcc (4.6) --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t




Acknowledgement sent to yary <not.com@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#15658; Package emacs. Full text available.
Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Last modified: Mon, 25 Nov 2019 12:00:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.