GNU bug report logs - #8895
24.0.50; Entering Directory matching no longer works in grep-mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Vagn Johansen <vagn.johansen <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50; Entering Directory matching no longer works in grep-mode
Date: Sat, 18 Jun 2011 23:24:33 +0200

I have often rely compilation-mode features when using grep-mode. For
example the Entering/Leving directory matching.

Example from grep-mode output


  Entering directory `/home/vagn/src/emacs/lisp/progmodes'
  compile.el:500:(defvar compilation-directory-matcher
  compile.el:1176:    ;; compilation-directory-matcher is the only part that really needs to be
  compile.el:1183:    (while (re-search-forward (car compilation-directory-matcher)
  compile.el:1190:         (vector 'directory compilation-directory-matcher)))
  compile.el:1191:      (dolist (elt (cdr compilation-directory-matcher))
  compile.el:1884:		   compilation-directory-matcher
  grep.el:701:  ;; compilation-directory-matcher can't be nil, so we set it to a regexp that
  grep.el:703:  (set (make-local-variable 'compilation-directory-matcher) '("\\`a\\`"))
  Leaving directory `/home/vagn/src/emacs/lisp/progmodes'

  Grep finished (matches found) at Sat Jun 18 23:16:38


The regression seems to stem from changes in function below. The
variable compilation-directory-matcher is set to a incorrect value. It
should have the same value has in compile-mode. I do not know if this
all that is needed to get the feature working again.

;;;###autoload
(define-compilation-mode grep-mode "Grep"
  "Sets `grep-last-buffer' and `compilation-window-height'."
  (setq grep-last-buffer (current-buffer))
  (set (make-local-variable 'tool-bar-map) grep-mode-tool-bar-map)
  (set (make-local-variable 'compilation-error-face)
       grep-hit-face)
  (set (make-local-variable 'compilation-error-regexp-alist)
       grep-regexp-alist)
  ;; compilation-directory-matcher can't be nil, so we set it to a regexp that
  ;; can never match.
  (set (make-local-variable 'compilation-directory-matcher) '("\\`a\\`"))
  (set (make-local-variable 'compilation-process-setup-function)
       'grep-process-setup)
  (set (make-local-variable 'compilation-disable-input) t)
  (add-hook 'compilation-filter-hook 'grep-filter nil t))




In GNU Emacs 24.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.20.1)
 of 2011-06-18 on vj-debian
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
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: en_GB.utf8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  global-auto-complete-mode: t
  auto-complete-mode: t
  display-time-mode: t
  iswitchb-mode: t
  which-function-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  show-paren-mode: t
  tooltip-mode: t
  mouse-wheel-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

Recent input:
) <escape> C-x M-i g <up> <return> C-h e C-x o M-< 
<down> <down> <down> <down> <down> <down> <down> <down> 
C-x = <left> C-x = <up> C-x = <up> C-x = C-x o C-x 
b <return> <down> <down> <down> C-h e C-x k <return> 
<up> <up> <up> <up> <right> <right> <right> <right> 
<right> <right> <right> <up> <up> <up> <up> C-w C-_ 
C-e <left> <left> <right> C-x C-e C-a <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> C-M-SPC M-w C-SPC C-e M-w C-x o M-: 
C-x b <return> M-< <escape> M-: C-y ) <left> SPC n 
l SPC <backspace> <backspace> i l SPC t <return> <escape> 
M-: C-g C-x o C-h e <up> <up> <up> <left> <left> <left> 
C-M-SPC M-w C-x o <escape> M-: C-y <left> <left> <left> 
<left> <up> <left> <left> <left> <left> <left> <left> 
<left> <left> <left> <left> <left> <left> <left> <left> 
<left> <left> <left> <left> <left> <left> <left> <left> 
<left> <left> <left> <left> <left> <left> <left> <left> 
<left> <left> <left> C-y C-M-SPC C-w <return> M-< <escape> 
M-: <up> <return> <escape> M-: <up> <return> M-< <escape> 
M-: <up> <up> <return> <escape> M-: <up> <return> <escape> 
M-: <up> <up> <down> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <left> <left> C-SPC <C-right> <C-right> <C-right> 
M-w C-g <escape> M-: C-y <return> C-x o C-x b <return> 
<C-left> <C-left> <C-left> M-i g <return> <help-echo> 
<down-mouse-1> <mouse-2> <help-echo> C-x C-v C-g C-x 
v g <help-echo> <help-echo> <C-next> <C-prior> <C-next> 
<C-prior> C-a <down> C-x o <up> <up> <up> <up> <up> 
<up> <up> <up> <up> C-a <up> <up> C-x o <up> <C-next> 
<C-prior> C-x o C-SPC <C-down> M-w M-x s u b <tab> 
<backspace> <backspace> <backspace> r e p o <tab> r 
<tab> <return>

Recent messages:
Grep finished (matches found)
VJ compilation--parse-region 2302 #<marker at 2356 in *grep*>
Mark set
Quit
Annotating...
Redisplaying annotation...done (Spanned from 7900.2 to 27.3 days old)
Mark set
Annotating... done
Mark set
Making completion list... [2 times]

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~/src/gnus/lisp/nnmairix hides /home/vagn/src/emacs/lisp/gnus/nnmairix
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~/src/gnus/lisp/ecomplete hides /home/vagn/src/emacs/lisp/gnus/ecomplete
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Features:
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ediff-mult ediff-init ediff vc-dispatcher dabbrev macros add-log
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Message #8 received at 8895 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Vagn Johansen <vagn.johansen <at> gmail.com>
Cc: 8895 <at> debbugs.gnu.org
Subject: Re: bug#8895: 24.0.50;
	Entering Directory matching no longer works in grep-mode
Date: Sun, 18 Sep 2011 14:28:14 -0400

Vagn Johansen <vagn.johansen <at> gmail.com> writes:

> I have often rely compilation-mode features when using grep-mode. For
> example the Entering/Leving directory matching.
>
> Example from grep-mode output
>
>   Entering directory `/home/vagn/src/emacs/lisp/progmodes'
>   compile.el:500:(defvar compilation-directory-matcher

By default, grep doesn't emit any "Entering directory" messages.  Did
you customize Emacs to do this?

Message #11 received at 8895 <at> debbugs.gnu.org (full text, mbox):

From: Vagn Johansen <vagn.johansen <at> gmail.com>
To: Chong Yidong <cyd <at> stupidchicken.com>
Cc: 8895 <at> debbugs.gnu.org
Subject: Re: bug#8895: 24.0.50;
	Entering Directory matching no longer works in grep-mode
Date: Sun, 18 Sep 2011 21:59:54 +0200

On Sun, Sep 18, 2011 at 8:28 PM, Chong Yidong <cyd <at> stupidchicken.com> wrote:
..
>
> By default, grep doesn't emit any "Entering directory" messages.  Did
> you customize Emacs to do this?
>

Yes, sort of . I call (grep COMMAND-ARGS) with an external program
(written by me) which write the "Entering directory" message.

Message #14 received at 8895 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Vagn Johansen <vagn.johansen <at> gmail.com>
Cc: 8895 <at> debbugs.gnu.org
Subject: Re: bug#8895: 24.0.50;
	Entering Directory matching no longer works in grep-mode
Date: Mon, 19 Sep 2011 15:11:24 -0400

Vagn Johansen <vagn.johansen <at> gmail.com> writes:

> Yes, sort of . I call (grep COMMAND-ARGS) with an external program
> (written by me) which write the "Entering directory" message.

In that case, you should use grep-mode-hook to set
compilation-directory-matcher accordingly.  For us to cater to
non-standard grep programs is a path to madness.

Message #19 received at 8895 <at> debbugs.gnu.org (full text, mbox):

From: Vagn Johansen <vagn.johansen <at> gmail.com>
To: Chong Yidong <cyd <at> stupidchicken.com>
Cc: 8895 <at> debbugs.gnu.org
Subject: Re: bug#8895: 24.0.50;
	Entering Directory matching no longer works in grep-mode
Date: Tue, 20 Sep 2011 16:45:31 +0200

On Mon, Sep 19, 2011 at 9:11 PM, Chong Yidong <cyd <at> stupidchicken.com> wrote:
> Vagn Johansen <vagn.johansen <at> gmail.com> writes:
>
>> Yes, sort of . I call (grep COMMAND-ARGS) with an external program
>> (written by me) which write the "Entering directory" message.
>
> In that case, you should use grep-mode-hook to set
> compilation-directory-matcher accordingly.  For us to cater to
> non-standard grep programs is a path to madness.

You can easily support "non-standard grep programs" by using a
standard expected output format. You already supported my program
because the bug I reported is a *regression*. I have been grepping
happily for many years with my program (within emacs).

My "non-standard grep program" follows the "standard" set forth by GNU
Make which prints out for example

  make: Entering directory `/u/vj/project1'

when run with make -C ~/project1


Maybe I have been lucky that grep-mode was built upon compilation-mode
so that I got
this additional feature, but I do not see it as "path to madness" if
you select *one* format
for parsing entering/leaving a directory information in grep output.

But yes, I should be able to use grep-mode-hook.

Regards
Vagn

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