Re: When was the function 'get-scratch-buffer-create' introduced?

[Philip Kaludercic <philipk@posteo.net>]

Akib Azmain Turja <akib@disroot.org> writes:

> On Emacs 28, 'get-scratch-buffer-create' seems to be undefined.  But
> there is no NEWS entry about introducing 'get-scratch-buffer-create'.
>
> When was this function introduced?
>
> [ Originally reported by cgenie at Workroom Codeberg repo.
>   https://codeberg.org/akib/emacs-workroom/issues/1 ]

This seems to have been the first commit:

--8<---------------cut here---------------start------------->8---
commit 054062060e9f57fd037578378c23ad9ec294edac
Author: Sean Whitton <spwhitton@spwhitton.name>
Date:   Thu May 5 13:03:06 2022 -0700

    Factor out *scratch* initialization
    
    * lisp/simple.el (get-scratch-buffer-create): New function, factored
    out of scratch-buffer, and additionally clearing the modification flag
    and calling substitute-command-keys (bug#55257).
    (scratch-buffer):
    * lisp/server.el (server-execute):
    * lisp/startup.el (normal-no-mouse-startup-screen, command-line-1):
    * lisp/window.el (last-buffer, window-normalize-buffer-to-switch-to):
    * src/buffer.c (Fother_buffer, other_buffer_safely): Use it.
    (syms_of_buffer): Add Qget_scratch_buffer_create.
    * lisp/startup.el (startup--get-buffer-create-scratch): Delete
    now-unused function.
    * doc/lispref/os.texi (Summary: Sequence of Actions at Startup):
    * NEWS (Incompatible changes in Emacs 29.1): Document the change.

diff --git a/lisp/simple.el b/lisp/simple.el
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -10216,0 +10216,12 @@
+(defun get-scratch-buffer-create ()
+  "Return the \*scratch\* buffer, creating a new one if needed."
+  (or (get-buffer "*scratch*")
+      (let ((scratch (get-buffer-create "*scratch*")))
+        ;; Don't touch the buffer contents or mode unless we know that
+        ;; we just created it.
+        (with-current-buffer scratch
+          (when initial-scratch-message
+            (insert (substitute-command-keys initial-scratch-message))
+            (set-buffer-modified-p nil))
+          (funcall initial-major-mode))
+        scratch)))
--8<---------------cut here---------------end--------------->8---

So it is part of Emacs 29.