(find-change-log): If file name specified, just use it.

diff --git a/lisp/add-log.el b/lisp/add-log.el
index be22f9e93d0cc47fb08a1b1a0e9b188826cdbe1f..721ef24ccfdbe8d47046ced01d354666e3df8fbe 100644 (file)
--- a/lisp/add-log.el
+++ b/lisp/add-log.el
@@ -67,55 +67,53 @@ an `@' character, followed by the value returned by `system-name'.")
 ;;;###autoload
 (defun find-change-log (&optional file-name)
   "Find a change log file for \\[add-change-log-entry] and return the name.
-Optional arg FILE-NAME is a name to try first.
+
+Optional arg FILE-NAME specifies the file to use.
 If FILE-NAME is nil, use the value of `change-log-default-name' if non-nil.
-Failing that, use \"ChangeLog\" in the current directory.
-If the file does not exist in the named directory, successive parent
-directories are tried.
+Otherwise, search in the current directory and its successive parents
+for a file named `ChangeLog' (or whatever we use on this operating system).
 
 Once a file is found, `change-log-default-name' is set locally in the
 current buffer to the complete file name."
+  ;; If user specified a file name or if this buffer knows which one to use,
+  ;; just use that.
   (or file-name
-      (setq file-name (or change-log-default-name
-                         ;; Chase links in the source file
-                         ;; and use the change log in the dir where it points.
-                         (and buffer-file-name
-                              (file-name-directory
-                               (file-chase-links buffer-file-name)))
-                         default-directory)))
-  (if (and (eq file-name change-log-default-name)
-          (assq 'change-log-default-name (buffer-local-variables)))
-      ;; Don't do the searching if we already have a buffer-local value.
-      file-name
-
-    (if (file-directory-p file-name)
-       (setq file-name (expand-file-name (change-log-name) file-name)))
-    ;; Chase links before visiting the file.
-    ;; This makes it easier to use a single change log file
-    ;; for several related directories.
-    (setq file-name (file-chase-links file-name))
-    (setq file-name (expand-file-name file-name))
-    ;; Move up in the dir hierarchy till we find a change log file.
-    (let ((file1 file-name)
-         parent-dir)
-      (while (and (not (or (get-file-buffer file1) (file-exists-p file1)))
-                 (progn (setq parent-dir
-                              (file-name-directory
-                               (directory-file-name
-                                (file-name-directory file1))))
-                        ;; Give up if we are already at the root dir.
-                        (not (string= (file-name-directory file1)
-                                      parent-dir))))
-       ;; Move up to the parent dir and try again.
-       (setq file1 (expand-file-name 
-                    (file-name-nondirectory (change-log-name))
-            parent-dir)))
-      ;; If we found a change log in a parent, use that.
-      (if (or (get-file-buffer file1) (file-exists-p file1))
-         (setq file-name file1)))
-    ;; Make a local variable in this buffer so we needn't search again.
-    (set (make-local-variable 'change-log-default-name) file-name)
-    file-name))
+      (setq file-name change-log-default-name)
+      (progn
+       ;; Chase links in the source file
+       ;; and use the change log in the dir where it points.
+       (setq file-name (or (and buffer-file-name
+                                (file-name-directory
+                                 (file-chase-links buffer-file-name)))
+                           default-directory))
+       (if (file-directory-p file-name)
+           (setq file-name (expand-file-name (change-log-name) file-name)))
+       ;; Chase links before visiting the file.
+       ;; This makes it easier to use a single change log file
+       ;; for several related directories.
+       (setq file-name (file-chase-links file-name))
+       (setq file-name (expand-file-name file-name))
+       ;; Move up in the dir hierarchy till we find a change log file.
+       (let ((file1 file-name)
+             parent-dir)
+         (while (and (not (or (get-file-buffer file1) (file-exists-p file1)))
+                     (progn (setq parent-dir
+                                  (file-name-directory
+                                   (directory-file-name
+                                    (file-name-directory file1))))
+                            ;; Give up if we are already at the root dir.
+                            (not (string= (file-name-directory file1)
+                                          parent-dir))))
+           ;; Move up to the parent dir and try again.
+           (setq file1 (expand-file-name 
+                        (file-name-nondirectory (change-log-name))
+                        parent-dir)))
+         ;; If we found a change log in a parent, use that.
+         (if (or (get-file-buffer file1) (file-exists-p file1))
+             (setq file-name file1)))))
+  ;; Make a local variable in this buffer so we needn't search again.
+  (set (make-local-variable 'change-log-default-name) file-name)
+  file-name)
 
 ;;;###autoload
 (defun add-change-log-entry (&optional whoami file-name other-window new-entry)