From bbe5ae70c17ff16801fef240f49b707535c7f64c Mon Sep 17 00:00:00 2001
From: Paul Ganssle <p.ganssle@gmail.com>
Date: Tue, 3 Mar 2020 07:00:52 -0500
Subject: [PATCH] Notify users of missing Python lazily (#1210)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

Currently this message shows up with no context prior to the start of
Vim. By changing this to a lazy message, the user will only be notified
of a problem with the Black plugin when they are attempting to use the
Black plugin.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
---
 plugin/black.vim | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/plugin/black.vim b/plugin/black.vim
index a4047d4..8106ea1 100644
--- a/plugin/black.vim
+++ b/plugin/black.vim
@@ -14,7 +14,12 @@
 "    - restore cursor/window position after formatting
 
 if v:version < 700 || !has('python3')
-    echo "The black.vim plugin requires vim7.0+ with Python 3.6 support."
+    func! __BLACK_MISSING()
+        echo "The black.vim plugin requires vim7.0+ with Python 3.6 support."
+    endfunc
+    command! Black :call __BLACK_MISSING()
+    command! BlackUpgrade :call __BLACK_MISSING()
+    command! BlackVersion :call __BLACK_MISSING()
     finish
 endif
 
-- 
2.39.5