From dfc7b60f560b5e4a498f6ef7ff72c1d234224cce Mon Sep 17 00:00:00 2001
From: dstandish <dstandish@users.noreply.github.com>
Date: Sun, 29 Dec 2019 12:21:51 -0800
Subject: [PATCH] [AIRFLOW-XXX] add note warning that bash>4.0 is required for
 docs build script (#6947)

---
 CONTRIBUTING.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index ad86c7c55a7069..c2a11e107c7e82 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -95,6 +95,10 @@ To generate a local version:
     ./build.sh
     ./start_doc_server.sh
 
+.. note::
+    The docs build script ``build.sh`` requires bash 4.0 or greater.
+    If you are building on mac, you can install latest version of bash with homebrew.
+
 
 Pull Request Guidelines
 =======================