etags.el fix for compressed files

* lisp/progmodes/etags.el (tags-compression-info-list): Doc fix.
(tag-find-file-of-tag-noselect):
Check auto-compression-mode rather than 'jka-compr being loaded.

Fixes: debbugs:13338

2 files changed, 8 insertions, 7 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 04ba7f802ca..34c13ad67fd 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,9 @@
 2013-01-03  Glenn Morris  <rgm@gnu.org>
 
+        * progmodes/etags.el (tags-compression-info-list): Doc fix.
+        (tag-find-file-of-tag-noselect): Check auto-compression-mode
+        rather than 'jka-compr being loaded.  (Bug#13338)
+
         * subr.el (eval-after-load): Don't purecopy the form, so that it
         can be nconc'd later on; reverts 2009-11-11 change.  (Bug#13331)
 
diff --git a/lisp/progmodes/etags.el b/lisp/progmodes/etags.el
index 3799fbc1e2d..dc16a2ce762 100644
--- a/lisp/progmodes/etags.el
+++ b/lisp/progmodes/etags.el
@@ -67,11 +67,8 @@ Use the `etags' program to make a tags table file."
 ;;;###autoload
 (defcustom tags-compression-info-list
   (purecopy '("" ".Z" ".bz2" ".gz" ".xz" ".tgz"))
-  "List of extensions tried by etags when jka-compr is used.
-An empty string means search the non-compressed file.
-These extensions will be tried only if jka-compr was activated
-\(i.e. via customize of `auto-compression-mode' or by calling the function
-`auto-compression-mode')."
+  "List of extensions tried by etags when `auto-compression-mode' is on.
+An empty string means search the non-compressed file."
   :version "24.1"                       ; added xz
   :type  '(repeat string)
   :group 'etags)
@@ -1180,7 +1177,7 @@ error message."
   "Find the right line in the specified FILE."
   ;; If interested in compressed-files, search files with extensions.
   ;; Otherwise, search only the real file.
-  (let* ((buffer-search-extensions (if (featurep 'jka-compr)
+  (let* ((buffer-search-extensions (if auto-compression-mode
                                        tags-compression-info-list
                                      '("")))
          the-buffer
@@ -1204,7 +1201,7 @@ error message."
           (setq file-search-extensions (cdr file-search-extensions))
         (setq the-buffer (find-file-noselect (concat file (car file-search-extensions))))))
     (if (not the-buffer)
-        (if (featurep 'jka-compr)
+        (if auto-compression-mode
             (error "File %s (with or without extensions %s) not found" file tags-compression-info-list)
           (error "File %s not found" file))
       (set-buffer the-buffer))))