--- Begin Message ---
Subject: |
26.0.90; set-auto-mode uses case-insensitive match for magic-mode-alist |
Date: |
Thu, 27 Jun 2019 11:30:47 +0200 |
My use case: I use "magic-mode-alist" to detect a binary file type for
which I have written a mode. The magic at the beginning is "mTFf", so
it is simple ASCII, but unusually capitalized. When I add this to
"magic-mode-alist", files and buffers that start with "mtff" are also
put in my binary file mode.
It turns out that "set-auto-mode" in lisp/files.el is the function that
uses magic-mode-alist, and it just calls "looking-at" to test the type.
Because "case-fold-search" is "t" by default, this catches files
starting with "mtff".
Is this intentional? If so, the documentation for "magic-mode-alist"
should call this out, so users know they might need to work around it.
If not, I could propose a patch to fix it.
TIA, benny
--
In GNU Emacs 26.0.90 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.14.5)
of 2017-10-18 built on riefenstahl-linux
Repository revision: b970a4a52a1c04afce4916ca2bf337e2b36d26c4
Windowing system distributor 'The X.Org Foundation', version 11.0.11604000
System Description: Debian GNU/Linux 8.11 (jessie)
Recent messages:
Mark set
Saving file /home/riefenstahl/.emacs.cfg/local.riefenstahl-linux.el...
Wrote /home/riefenstahl/.emacs.cfg/local.riefenstahl-linux.el
(No changes need to be saved)
Auto-saving...done
Saving file /home/riefenstahl/.emacs.cfg/local.riefenstahl-linux.el...
Wrote /home/riefenstahl/.emacs.cfg/local.riefenstahl-linux.el
(No changes need to be saved) [6 times]
Making completion list...
Type "q" in help window to restore its previous buffer.
Configured features:
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ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 LCMS2
Important settings:
value of $LANG: C.UTF-8
locale-coding-system: utf-8-unix
Major mode: Emacs-Lisp
Minor modes in effect:
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magit-file-mode: t
global-git-commit-mode: t
async-bytecomp-package-mode: t
desktop-save-mode: t
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diff-auto-refine-mode: t
delete-selection-mode: t
shell-dirtrack-mode: t
tooltip-mode: t
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eldoc-mode: t
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mouse-wheel-mode: t
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auto-composition-mode: t
auto-encryption-mode: t
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column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
~/site-lisp/css-mode hides
/usr/local/share/emacs/26.0.90/lisp/textmodes/css-mode
Features:
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time server protbuf solar cal-dst cal-islam cal-hebrew holidays
hol-loaddefs vc-git diff-mode easy-mmode diary-lib diary-loaddefs
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delsel cus-start cus-load generic benny-calendar-cfg derived cc-mode
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cc-defs filecache benny-file-cache tramp-sh docker-tramp tramp-cache
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font-lock syntax facemenu font-core term/tty-colors frame cl-generic
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korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
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cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)
Memory information:
((conses 16 418674 115456)
(symbols 48 37479 2)
(miscs 40 2593 3720)
(strings 32 93366 4129)
(string-bytes 1 2851917)
(vectors 16 66469)
(vector-slots 8 1822112 223144)
(floats 8 700 564)
(intervals 56 6177 3982)
(buffers 992 36)
(heap 1024 70067 2662))
--- End Message ---
--- Begin Message ---
Subject: |
Re: bug#36401: 26.0.90; set-auto-mode uses case-insensitive match for magic-mode-alist |
Date: |
Sat, 20 Jul 2019 12:35:06 +0300 |
> From: Benjamin Riefenstahl <address@hidden>
> Cc: Benjamin Riefenstahl <address@hidden>, address@hidden
> Date: Sun, 14 Jul 2019 17:23:57 +0200
>
> Eli Zaretskii writes:
> > I think this is an omission. Please do propose a patch to fix it.
>
> See attached. This applies against master, but the conflict against
> emacs-26 is also just minor. Please advise if you want this
> differently.
Thanks, pushed to the master branch.
--- End Message ---