bug#74087: Bug patch: invoke tab-bar-tab-post-open-functions during tabs initialization

[Ship Mints <shipmints@gmail.com>]

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Greetings,

tab-bar-tab-post-open-functions need to be called during tab-bar
initialization. Currently, a user's custom post-open functions are invoked
only for tabs created beyond the initial tab. This is a bug, in my view.

I've created the patch vs. this morning's master and should also benefit
Emacs 30. I've been running a patched copy against my daily-use 29.4 for a
bit and it works as expected.

-Stephane

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From 61a801eedb10d3d0dac5cf8b57c6b3641a6d226d Mon Sep 17 00:00:00 2001
From: shipmints <shipmints@gmail.com>
Date: Tue, 29 Oct 2024 09:56:15 -0400
Subject: [PATCH] Call tab-bar-tab-post-open-functions during tabs
 initialization

---
 lisp/tab-bar.el | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lisp/tab-bar.el b/lisp/tab-bar.el
index 2efc2b8f85b..7fc04ab3c32 100644
--- a/lisp/tab-bar.el
+++ b/lisp/tab-bar.el
@@ -803,7 +803,9 @@ Return its existing value or a new value."
                   (funcall tab-bar-tab-name-function))))
       ;; Create default tabs
       (setq tabs (list (tab-bar--current-tab-make)))
-      (tab-bar-tabs-set tabs frame))
+      (tab-bar-tabs-set tabs frame)
+      (run-hook-with-args 'tab-bar-tab-post-open-functions
+                          (car tabs)))
     tabs))
 
 (defun tab-bar-tabs-set (tabs &optional frame)
-- 
2.47.0