From 8d360474aca6adc04eb048e6bdf22ef083cdb4ed Mon Sep 17 00:00:00 2001
From: Gerry Agbobada <10496163+gagbo@users.noreply.github.com>
Date: Sat, 20 Nov 2021 18:32:59 +0100
Subject: [PATCH] docs: add doctor for dev versions of Emacs

The message simply test for the "not-a-version-yet" patch number and
displays an explanation to prepare users for raised error frequency and
having a backup version of Emacs if they do not want to deal with
issues.
---
 core/cli/doctor.el | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/core/cli/doctor.el b/core/cli/doctor.el
index 0f326c62e..4c5b83769 100644
--- a/core/cli/doctor.el
+++ b/core/cli/doctor.el
@@ -50,6 +50,17 @@ in."
   (print! (start "Checking your Emacs version..."))
   (print-group!
    (cond
+    ((string= ".50" (substring emacs-version -3))
+     (error! "Emacs development version detected (%s)" emacs-version)
+     ;; There are 2 newlines between each item to fight against
+     ;; the (fill-region) call in `doom--output-autofill'
+     (explain! "Doom supports this version, but you are using a development version of Emacs! "
+               "Be prepared for possibly weekly breakages that\n\n"
+               "\t- you will have to investigate yourself,\n\n"
+               "\t- might appear, or be solved, on any Emacs update,\n\n"
+               "\t- might depend subtly on upstream packages updates\n\n"
+               "You might need to unpin packages to get a fix for a specific commit of Emacs, "
+               "and you should be ready to downgrade Emacs if something is just not fixable."))
     (EMACS28+
      (warn! "Emacs %s detected" emacs-version)
      (explain! "Doom supports this version, but you are living on the edge! "