From a1a7e7cd249da03844601b9163d58dd496fb7d95 Mon Sep 17 00:00:00 2001
From: Mario Rodas <marsam@users.noreply.github.com>
Date: Tue, 25 Sep 2018 16:44:38 -0500
Subject: [PATCH] bash: fix `bashrcExtra` interactive shell test

To determine if bash is running interactively test whether "$-"
contains "i".

See: https://www.gnu.org/software/bash/manual/html_node/Is-this-Shell-Interactive_003f.html
---
 modules/programs/bash.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/programs/bash.nix b/modules/programs/bash.nix
index d8359c12f..14a158a24 100644
--- a/modules/programs/bash.nix
+++ b/modules/programs/bash.nix
@@ -155,7 +155,7 @@ in
     in mkIf cfg.enable {
       programs.bash.bashrcExtra = ''
         # Commands that should be applied only for interactive shells.
-        if [[ -n $PS1 ]]; then
+        if [[ $- == *i* ]]; then
           ${historyControlStr}
 
           ${shoptsStr}