gnus-group.el (gnus-import-other-newsrc-file): New function.

lisp/gnus/ChangeLog

@@ -1,3 +1,7 @@
+2011-02-27  Lars Magne Ingebrigtsen  <larsi@gnus.org>
+
+	* gnus-group.el (gnus-import-other-newsrc-file): New function.
+
 2011-02-25  Teodor Zlatanov  <tzz@lifelogs.com>
 
 	* auth-source.el (auth-source-search): Cache empty result sets.

lisp/gnus/gnus-group.el

@@ -4400,6 +4400,21 @@ and the second element is the address."
 (defun gnus-group-set-params-info (group params)
   (gnus-group-set-info params group 'params))
 
+;; Ad-hoc function for inserting data from a different newsrc.eld
+;; file.  Use with caution, if at all.
+(defun gnus-import-other-newsrc-file (file)
+  (with-temp-buffer
+    (insert-file file)
+    (let (form)
+      (while (ignore-errors
+	       (setq form (read (current-buffer))))
+	(when (and (consp form)
+		   (eq (cadr form) 'gnus-newsrc-alist))
+	  (let ((infos (cadr (nth 2 form))))
+	    (dolist (info infos)
+	      (when (gnus-get-info (car info))
+		(gnus-set-info (car info) info)))))))))
+
 (defun gnus-add-marked-articles (group type articles &optional info force)
   ;; Add ARTICLES of TYPE to the info of GROUP.
   ;; If INFO is non-nil, use that info.  If FORCE is non-nil, don't

lisp/gnus/gnus.el

@@ -3114,6 +3114,10 @@ Return nil if not defined."
 (defmacro gnus-get-info (group)
   `(nth 2 (gnus-gethash ,group gnus-newsrc-hashtb)))
 
+(defun gnus-set-info (group info)
+  (setcar (nthcdr 2 (gnus-gethash group gnus-newsrc-hashtb))
+	  info))
+
 ;;; Load the compatibility functions.
 
 (require 'gnus-ems)