From: Radey Shouman <shouman@comcast.net>
To: gnu-emacs-bug@moderators.individual.net
Subject: Re: Etags completion problem for local tags table
Date: 29 Apr 2008 16:08:56 -0400 [thread overview]
Message-ID: <87y76wwhif.fsf@comcast.net> (raw)
In-Reply-To: mailman.10789.1209074215.18990.bug-gnu-emacs@gnu.org
Radey Shouman <shouman@comcast.net> writes:
> Radey Shouman <shouman@comcast.net> writes:
>
> > In (at least) emacs 22.1, completing reads for find-tag and list-tags
> > will use the global tags table list even if a local tags file has
> > been specified using a prefix argument for visit-tags-table.
> >
> > To reproduce, visit two files, in the first buffer visit a tags file
> > globally, in the second a different tags file locally. From the
> > second buffer, try M.[TAB] . The tag list displayed will correspond
> > to the first, globally visited, tags file.
>
> The patch presented earlier had problems - the root issue is that
> variables tags-file-name and tags-table-list are used for returning
> information from functions which may change the current buffer.
>
> One manifestation of the problem can be seen by setting a local tags
> file using C-uM-x visit-tags-table twice in the same buffer. The
> second attempt will fail to set a local tags table, but will set the
> global tags table.
>
> This patch also modifies visit-tags-table so that it will remove a
> local tags table if present in the buffer in which it is called to set
> a global tags table. This is arguably not a bug fix, but seems much
> less suprising than the current behavior.
Yet another patch, this one additionally fixes tags-query-replace and
other users of next-file. The current etags.el fails when using
tags-query-replace with buffer-local tags tables (expand-file is
called with an argument of nil).
*** /local/emacs/emacs-22.1/lisp/progmodes/etags.el.dist 2007-01-21 03:20:46.000000000 -0500
--- etags.el 2008-04-28 15:05:35.044759300 -0400
***************
*** 257,262 ****
--- 257,264 ----
"Function to do the work of `tags-included-tables' (which see).")
(defvar verify-tags-table-function nil
"Function to return t iff current buffer contains valid tags file.")
+ (defvar etags-calling-buffer nil
+ "Buffer from which a completing read was made, so we can determine the appropriate tags file to visit.")
\f
;; Initialize the tags table in the current buffer.
;; Returns non-nil iff it is a valid tags table. On
***************
*** 305,323 ****
;; Calling visit-tags-table-buffer with tags-file-name set to FILE will
;; initialize a buffer for FILE and set tags-file-name to the
;; fully-expanded name.
! (let ((tags-file-name file))
! (save-excursion
! (or (visit-tags-table-buffer file)
! (signal 'file-error (list "Visiting tags table"
! "file does not exist"
! file)))
! ;; Set FILE to the expanded name.
! (setq file tags-file-name)))
! (if local
! ;; Set the local value of tags-file-name.
! (set (make-local-variable 'tags-file-name) file)
! ;; Set the global value of tags-file-name.
! (setq-default tags-file-name file)))
(defun tags-table-check-computed-list ()
"Compute `tags-table-computed-list' from `tags-table-list' if necessary."
--- 307,335 ----
;; Calling visit-tags-table-buffer with tags-file-name set to FILE will
;; initialize a buffer for FILE and set tags-file-name to the
;; fully-expanded name.
! (let (table-list)
! (let ((tags-file-name file)
! (tags-table-list tags-table-list))
! (save-excursion
! (or (visit-tags-table-buffer file)
! (signal 'file-error (list "Visiting tags table"
! "file does not exist"
! file))))
! ;; Set FILE to the expanded name. Note that we have to do this from the original
! ;; buffer, in case tags-file-name or tags-table-list are buffer-local.
! (setq file tags-file-name
! table-list tags-table-list))
!
! (if local
! ;; Set the local value of tags-file-name.
! (progn
! (set (make-local-variable 'tags-file-name) file)
! (set (make-local-variable 'tags-table-list) table-list))
! ;; Set the global value of tags-file-name.
! (kill-local-variable 'tags-file-name)
! (kill-local-variable 'tags-table-list)
! (setq tags-file-name file
! tags-table-list table-list))))
(defun tags-table-check-computed-list ()
"Compute `tags-table-computed-list' from `tags-table-list' if necessary."
***************
*** 444,459 ****
(revert-buffer t t)
(tags-table-mode)))
(and (file-exists-p file)
! (progn
(set-buffer (find-file-noselect file))
(or (string= file buffer-file-name)
;; find-file-noselect has changed the file name.
;; Propagate the change to tags-file-name and tags-table-list.
! (let ((tail (member file tags-table-list)))
! (if tail
! (setcar tail buffer-file-name))
! (if (eq file tags-file-name)
! (setq tags-file-name buffer-file-name))))
(tags-table-mode)))))
;; Subroutine of visit-tags-table-buffer. Search the current tags tables
--- 456,475 ----
(revert-buffer t t)
(tags-table-mode)))
(and (file-exists-p file)
! (let ((obuf (current-buffer)))
(set-buffer (find-file-noselect file))
(or (string= file buffer-file-name)
;; find-file-noselect has changed the file name.
;; Propagate the change to tags-file-name and tags-table-list.
! ;; We have to do this in the buffer current when we were called
! ;; because tags-table-list and tags-file-name may be buffer local.
! (save-excursion
! (set-buffer obuf)
! (let ((tail (member file tags-table-list)))
! (if tail
! (setcar tail buffer-file-name))
! (if (eq file tags-file-name)
! (setq tags-file-name buffer-file-name)))))
(tags-table-mode)))))
;; Subroutine of visit-tags-table-buffer. Search the current tags tables
***************
*** 538,543 ****
--- 554,564 ----
`tags-file-name', `tags-table-list', `tags-table-list-pointer'.
Returns t if it visits a tags table, or nil if there are no more in the list."
+ ;; We may be called from a minibuffer if invoked during completion.
+ ;; this can be a problem when the tags tables are buffer-local.
+ (if etags-calling-buffer
+ (set-buffer etags-calling-buffer))
+
;; Set tags-file-name to the tags table file we want to visit.
(cond ((eq cont 'same)
;; Use the ambient value of tags-file-name.
***************
*** 781,787 ****
\f
;; Read a tag name from the minibuffer with defaulting and completion.
(defun find-tag-tag (string)
! (let* ((completion-ignore-case (if (memq tags-case-fold-search '(t nil))
tags-case-fold-search
case-fold-search))
(default (funcall (or find-tag-default-function
--- 802,809 ----
\f
;; Read a tag name from the minibuffer with defaulting and completion.
(defun find-tag-tag (string)
! (let* ((etags-calling-buffer (current-buffer))
! (completion-ignore-case (if (memq tags-case-fold-search '(t nil))
tags-case-fold-search
case-fold-search))
(default (funcall (or find-tag-default-function
***************
*** 1658,1682 ****
((eq initialize t)
;; Initialize the list from the tags table.
(save-excursion
! ;; Visit the tags table buffer to get its list of files.
! (visit-tags-table-buffer)
! ;; Copy the list so we can setcdr below, and expand the file
! ;; names while we are at it, in this buffer's default directory.
! (setq next-file-list (mapcar 'expand-file-name (tags-table-files)))
! ;; Iterate over all the tags table files, collecting
! ;; a complete list of referenced file names.
! (while (visit-tags-table-buffer t)
! ;; Find the tail of the working list and chain on the new
! ;; sublist for this tags table.
! (let ((tail next-file-list))
! (while (cdr tail)
! (setq tail (cdr tail)))
! ;; Use a copy so the next loop iteration will not modify the
! ;; list later returned by (tags-table-files).
! (if tail
! (setcdr tail (mapcar 'expand-file-name (tags-table-files)))
! (setq next-file-list (mapcar 'expand-file-name
! (tags-table-files))))))))
(t
;; Initialize the list by evalling the argument.
(setq next-file-list (eval initialize))))
--- 1680,1705 ----
((eq initialize t)
;; Initialize the list from the tags table.
(save-excursion
! (let ((etags-calling-buffer (current-buffer)))
! ;; Visit the tags table buffer to get its list of files.
! (visit-tags-table-buffer)
! ;; Copy the list so we can setcdr below, and expand the file
! ;; names while we are at it, in this buffer's default directory.
! (setq next-file-list (mapcar 'expand-file-name (tags-table-files)))
! ;; Iterate over all the tags table files, collecting
! ;; a complete list of referenced file names.
! (while (visit-tags-table-buffer t)
! ;; Find the tail of the working list and chain on the new
! ;; sublist for this tags table.
! (let ((tail next-file-list))
! (while (cdr tail)
! (setq tail (cdr tail)))
! ;; Use a copy so the next loop iteration will not modify the
! ;; list later returned by (tags-table-files).
! (if tail
! (setcdr tail (mapcar 'expand-file-name (tags-table-files)))
! (setq next-file-list (mapcar 'expand-file-name
! (tags-table-files)))))))))
(t
;; Initialize the list by evalling the argument.
(setq next-file-list (eval initialize))))
next prev parent reply other threads:[~2008-04-29 20:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.7663.1203474863.18990.bug-gnu-emacs@gnu.org>
2008-04-04 0:55 ` Etags completion problem for local tags table Stefan Monnier
2008-04-24 19:03 ` Radey Shouman
[not found] ` <mailman.10789.1209074215.18990.bug-gnu-emacs@gnu.org>
2008-04-29 20:08 ` Radey Shouman [this message]
2016-02-29 5:00 ` bug#158: " Lars Ingebrigtsen
2016-02-29 14:58 ` Radey Shouman
2016-11-22 18:23 ` Josiah Schwab
2008-02-19 23:27 Radey Shouman
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