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bug#19140: dir-locals-collect-variables discrepancy in handling non-file
From: |
Ivan Shmakov |
Subject: |
bug#19140: dir-locals-collect-variables discrepancy in handling non-file buffers |
Date: |
Fri, 21 Nov 2014 16:12:52 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Package: emacs
Severity: minor
Please consider the patch MIMEd.
* lisp/files.el (dir-locals-collect-variables): Use
default-directory in place of the file name while working on
non-file buffers (as hack-dir-local-variables already does.)
The issue I observe is as follows. First, I create ~/foo and
~/foo/ru directories, and a ~/foo/.dir-locals.el file like:
((nil
(ispell-local-dictionary . "esperanto"))
("ru"
(nil
(ispell-local-dictionary . "russian"))))
Then:
(with-temp-buffer
(cd "~/foo/ru/")
(hack-dir-local-variables-non-file-buffer)
;; .
dir-local-variables-alist)
The result is '((ispell-local-dictionary . "esperanto")),
contrary to the expected '((… . "russian")).
This does not happen for buffers associated with files:
(with-current-buffer (find-file-noselect "~/foo/ru/bar")
(hack-dir-local-variables)
;; .
dir-local-variables-alist)
Reading the code suggests that dir-locals-collect-variables
fails to handle the (stringp key) case properly when ‘file-name’
is nil, which is what my patch is intended to fix.
--
FSF associate member #7257 np. Conclusion — Apocalyptica … B6A0 230E 334A
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -3567,8 +3569,10 @@
(defun dir-locals-collect-variables (class-variables root variables)
"Collect entries from CLASS-VARIABLES into VARIABLES.
ROOT is the root directory of the project.
Return the new variables list."
- (let* ((file-name (buffer-file-name))
+ (let* ((file-name (or (buffer-file-name)
+ ;; handle non-file buffers, too
+ default-directory))
(sub-file-name (if file-name
;; FIXME: Why not use file-relative-name?
(substring file-name (length root)))))
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