[PATCH] org-archive.el: Fix org-add-archive-files to correctly de-duplicate

[Anand Deopurkar <anandrdeopurkar@gmail.com>]

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From 44b681b82a23f0a475e706d4fab2a46d6aedeea5 Mon Sep 17 00:00:00 2001
From: Anand Deopurkar <anandrdeopurkar@gmail.com>
Date: Sat, 2 Mar 2024 21:24:19 +1100
Subject: [PATCH] org-archive.el: Fix org-add-archive-files to correctly
 de-duplicate

* org-archive.el (org-add-archive-files): Use `seq-uniq' with TESTFN
`\#\'file-equal-p' to de-duplicate the list of gathered files.

Previously, `org-uniquify' was used.  This de-duplicates the
file-names, but not necessarily the files.  The problem occurs if the
list of file-names includes distinct file-names that reference the
same file (symbolic links, for example).

TINYCHANGE
---
 lisp/org-archive.el | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lisp/org-archive.el b/lisp/org-archive.el
index 20b962057..e46649fd3 100644
--- a/lisp/org-archive.el
+++ b/lisp/org-archive.el
@@ -157,7 +157,7 @@ archive location, but not yet deleted from the original file.")
   "Splice the archive FILES into the list of files.
 This implies visiting all these files and finding out what the
 archive file is."
-  (org-uniquify
+  (seq-uniq
    (apply
     'append
     (mapcar
@@ -166,7 +166,9 @@ archive file is."
 	   nil
 	 (with-current-buffer (org-get-agenda-file-buffer f)
 	   (cons f (org-all-archive-files)))))
-     files))))
+     files))
+   #'file-equal-p
+   ))
 
 (defun org-all-archive-files ()
   "List of all archive files used in the current buffer."
-- 
2.43.0