* riece-log.el (riece-log-lock-file): Define with defvar.

[riece] / lisp / riece-log.el

diff --git a/lisp/riece-log.el b/lisp/riece-log.el
index c768464..263bcd5 100644 (file)
--- a/lisp/riece-log.el
+++ b/lisp/riece-log.el
@@ -89,6 +89,10 @@ If integer, flash back only this line numbers. t means all lines."
   :group 'riece-highlight-faces)
 (defvar riece-log-date-face 'riece-log-date-face)
 
+(defvar riece-log-lock-file nil
+  "Lock file for riece-log.
+It is created if there is at least one instance of Emacs running riece-log.")
+
 (defvar riece-log-enabled nil)
 
 (defconst riece-log-description
@@ -104,7 +108,8 @@ If integer, flash back only this line numbers. t means all lines."
          (make-directory (file-name-directory file) t))
        (write-region (concat (format-time-string "%H:%M") " "
                              (riece-format-message message))
-                     nil file t 0))))
+                     nil file t 0
+                     riece-log-lock-file))))
 
 (defun riece-log-get-file (identity)
   (expand-file-name
@@ -248,6 +253,13 @@ If LINES is t, insert today's logs entirely."
       '(riece-button)))
 
 (defun riece-log-insinuate ()
+  (make-directory riece-log-directory t)
+  (setq riece-log-lock-file
+       (expand-file-name (format "=lock.%s@%s.%d"
+                                 (user-login-name)
+                                 (system-name)
+                                 (emacs-pid))
+                         riece-log-directory))
   ;; FIXME: Use `riece-after-insert-functions' for trapping change,
   ;; notice, wallops and so on. But must add argument.
   (add-hook 'riece-after-display-message-functions