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bug#15754: 24.3.50; [PATCH] vc-ignore makes no sense


From: Andreas Politz
Subject: bug#15754: 24.3.50; [PATCH] vc-ignore makes no sense
Date: Wed, 30 Oct 2013 13:38:46 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

There are two problems with this function.

1. It uses vc-backend on the default-directory, which in turn uses
vc-registered.  But the return value of this function for directories
seems to be back end dependent.  E.g. in git it returns always nil for
directories, in bzr it seems to return t only if directory does not end
with a slash.  I am not sure which of these things needs to be fixed.
I suppose this function should do what it says and return t for
registered files (including directories).  But vc-ignore should also
work in the root directory, which technically is not registered.  So I
replaced it with vc-responsible-backend.

2. The interactive spec, when reading the documentation, makes no sense
to me.  I assume this is just an oversight.

3. The function should not have different abilities depending on whether
it was called interactively or not.

-ap

=== modified file 'lisp/vc/vc.el'
*** lisp/vc/vc.el       2013-10-25 02:33:42 +0000
--- lisp/vc/vc.el       2013-10-28 17:04:10 +0000
***************
*** 1350,1373 ****
    (let ((vc-handled-backends (list backend)))
      (call-interactively 'vc-register)))
  
! (defun vc-ignore (file &optional directory)
!   "Ignore FILE under the VCS of DIRECTORY (default is `default-directory').
! FILE is a file wildcard.
! When called interactively and with a prefix argument, remove FILE
! from ignored files.
! When called from Lisp code, if DIRECTORY is non-nil, the
! repository to use will be deduced by DIRECTORY."
    (interactive
!    (list (read-file-name "The file to ignore: ")
         (completing-read
!         "The file to remove: "
          (vc-call-backend
!          (vc-backend default-directory)
!          'ignore-completion-table default-directory))))
    (let* ((directory (or directory default-directory))
!        (backend (vc-backend default-directory))
!        (remove current-prefix-arg))
!     (vc-call-backend backend 'ignore file directory remove)))
  
  (defun vc-default-ignore (backend file &optional directory remove)
    "Ignore FILE under the VCS of DIRECTORY (default is `default-directory').
--- 1350,1382 ----
    (let ((vc-handled-backends (list backend)))
      (call-interactively 'vc-register)))
  
! (defun vc-ignore (file &optional directory remove-p)
!   "Ignore or remove FILE under the VCS of DIRECTORY.
! 
! If REMOVE-P if nil, FILE is a file wild-card to be ignored.
! Otherwise, remove FILE from the list of ignored files.
! 
! DIRECTORY defaults to `default-directory' and is used to
! determine the responsible VCS back-end.
! 
! Interactively, FILE is ignored, unless a prefix argument is
! given, which queries for a FILE to remove from the list of
! ignored files."
    (interactive
!    (list
!     (if (not current-prefix-arg)
!         (read-file-name "File to ignore: ")
        (completing-read
!        "File to remove: "
         (vc-call-backend
!         (or (vc-responsible-backend default-directory)
!             (error "Unknown back end"))
!         'ignore-completion-table default-directory)))
!     nil current-prefix-arg))
    (let* ((directory (or directory default-directory))
!        (backend (or (vc-responsible-backend default-directory)
!                       (error "Unknown back end"))))
!     (vc-call-backend backend 'ignore file directory remove-p)))
  
  (defun vc-default-ignore (backend file &optional directory remove)
    "Ignore FILE under the VCS of DIRECTORY (default is `default-directory').




In GNU Emacs 24.3.50.6 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2013-10-24 on luca
Bzr revision: 114430 address@hidden
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
System Description:     Debian GNU/Linux 6.0.8 (squeeze)

Configured using:
 `configure -C'

Important settings:
  value of $LC_COLLATE: C
  value of $LC_MESSAGES: C
  value of $LANG: de_DE.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
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  mimo-mode: t
  pc-completion-mode: t
  ispell-track-input-method: t
  semantic-mode: t
  recentf-mode: t
  show-paren-mode: t
  window-numbering-mode: t
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Recent input:
C-n C-n C-n C-n C-n C-n C-x o C-M-b C-M-SPC M-x f i 
x <return> M-x M-x <return> C-g C-x o C-l M-v C-l C-x 
o C-u C-x v = C-p C-e DEL <backspace> 2 9 M-h t r u 
n M-p M-p M-h C-k b z M-p DEL DEL DEL h h <backspace> 
t M-p DEL DEL C-r b z r C-r C-e <return> <return> C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-; b u C-; b r v c . p a t 
c h <return> C-x C-w / t m p <return> C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p M-f C-, g <return> C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-x k <return> 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-l C-n C-n C-n C-n C-n C-n C-n C-n 
C-x o C-n C-n C-n C-M-f C-M-f C-M-f C-M-f C-M-f C-M-f 
M-f M-f M-f M-f SPC b e M-f e d DEL DEL d M-q C-n C-r 
i s C-r C-r <return> C-n M-f C-M-f C-e C-n C-n C-M-b 
C-M-b C-M-b C-M-b a n d SPC M-b C-b , M-q M-f i DEL 
SPC i t M-q C-/ M-h M-b DEL DEL SPC M-q C-n C-M-a C-n 
M-m C-M-SPC M-x i s p e l l <return> a 1 1 C-n C-n 
C-n C-n C-n C-n C-p C-n C-e M-b DEL SPC DEL - C-n C-n 
C-n C-x C-s C-u C-x v = C-p C-p <return> <return> C-x 
o M-x r e p o r t - e m <tab> b u <return>

Recent messages:
Wrote /tmp/vc.patch
Mark set
Mark saved where search started
Undo!
Mark set [2 times]
Spell-checking region using aspell with en dictionary...done
Saving file /home/politza/src/emacs/override-redirect/lisp/vc/vc.el...
Wrote /home/politza/src/emacs/override-redirect/lisp/vc/vc.el
Finding changes in /home/politza/src/emacs/override-redirect/lisp/vc/vc.el...
View mode: type C-h for help, h for commands, q to quit.

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gfilenotify dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)

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