The function ‘vc-default-dir-extra-headers’ is implemented as a stub function that prints in the vc-dir buffer a rather annoying and unhelpful message advicing that the implementer of a VC backend should create some backend specific headers and that doing this is easy. vc-rcs doesn't implement any (and I doubt it needs), and thus whenever I use vc-dir on an RCS repository, this message is shown. Attached is a patch that disables this behaviour by making the said function return nil instead (the function as it is includes a comment that says to do so before the ‘release’).
vc-default-dir-extra-headers.patch
Description: the patch
In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
of 2017-09-23 built on alpha
Repository revision: c0af83b6ccf2dab9a515dd7f52eb9d4500275ae3
Windowing system distributor 'The X.Org Foundation', version 11.0.11903000
System Description: Ubuntu 17.04
Recent messages:
user-error: Beginning of history; no preceding item
Making completion list... [2 times]
You can run the command ‘eval-buffer’ with M-x ev-b RET
Please type y, n, or !: n [2 times]
Traversing directory /igk/documents/not/org/...
Traversing directory /igk/documents/not/org/Attic...
Traversing directory /igk/documents/not/org/Attic/old_rcs...
Traversing directory /igk/documents/not/org/img...
Traversing directory /igk/documents/not/org/mobile...
Traversing directory /igk/documents/not/org/...done
Configured using:
'configure --prefix=/home/g/local --with-x-toolkit=gtk3 --with-modules
--with-file-notification=yes --without-threads --with-gameuser=no
--with-mailutils'
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY
ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 MODULES LCMS2
Important settings:
value of $LC_MESSAGES: en_GB.UTF-8
value of $LC_MONETARY: tr_TR.UTF-8
value of $LC_NUMERIC: tr_TR.UTF-8
value of $LC_TIME: tr_TR.UTF-8
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Emacs-Lisp
Minor modes in effect:
diff-auto-refine-mode: t
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
electric-indent-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
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message subr-x puny format-spec rfc822
mml mml-sec password-cache epa epg epg-config gnus-util rmail
rmail-loaddefs mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils vc-filewise vc-rcs dired dired-loaddefs
vc-dir derived edmacro kmacro cl-seq cl-macs ewoc vc vc-dispatcher
vc-git diff-mode easymenu easy-mmode map seq byte-opt gv bytecomp
byte-compile cconv cl-loaddefs cl-lib elec-pair time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode
lisp-mode prog-mode register page menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame cl-generic cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932
hebrew greek romanian slovak czech european ethiopic indian cyrillic
chinese composite charscript charprop case-table epa-hook jka-cmpr-hook
help simple abbrev obarray minibuffer 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 112482 13582)
(symbols 48 21631 1)
(miscs 40 59 266)
(strings 32 32386 1218)
(string-bytes 1 844152)
(vectors 16 16604)
(vector-slots 8 510732 9057)
(floats 8 52 204)
(intervals 56 513 29)
(buffers 992 18))
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