From c02d57846874df2350f09c2f4069d1df4b3c199a Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 4 Mar 2022 20:59:22 +0530
Subject: [PATCH] Nicer error message if bash version < 4

macOS has bash 3
---
 shell-integration/bash/kitty.bash | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/shell-integration/bash/kitty.bash b/shell-integration/bash/kitty.bash
index dac4f1d81..427a205de 100644
--- a/shell-integration/bash/kitty.bash
+++ b/shell-integration/bash/kitty.bash
@@ -53,7 +53,13 @@ _ksi_inject() {
 }
 _ksi_inject
 builtin unset -f _ksi_inject
-if [[ "$_ksi_prompt[sourced]" != "[sourced]" ]]; then 
+
+if [ "${BASH_VERSINFO:-0}" -lt 4 ]; then
+    builtin printf "%s\n" "Bash version ${BASH_VERSION} too old, kitty shell integration disabled" > /dev/stderr;
+    builtin return;
+fi
+
+if [[ "${_ksi_prompt[sourced]}" == "y" ]]; then 
     # we have already run
     builtin unset KITTY_SHELL_INTEGRATION
     builtin return;