From 24a4067cb32701fbb706786dafed0e7edc5a01fe Mon Sep 17 00:00:00 2001
From: John D Pell <John+git@gaelicWizard.net>
Date: Fri, 10 Sep 2021 13:55:23 -0700
Subject: [PATCH] theme/powerline-plain: adopt automatic history

Use `preexec` and `$HISTCONTROL` to configure _Bash It_'s automatic history management feature.
---
 themes/powerline-plain/powerline-plain.base.bash | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/themes/powerline-plain/powerline-plain.base.bash b/themes/powerline-plain/powerline-plain.base.bash
index ce91ef89..60aa27ae 100644
--- a/themes/powerline-plain/powerline-plain.base.bash
+++ b/themes/powerline-plain/powerline-plain.base.bash
@@ -1,5 +1,18 @@
+# shellcheck shell=bash
 . "$BASH_IT/themes/powerline/powerline.base.bash"
 
+case $HISTCONTROL in
+*'auto'*)
+	: # Do nothing, already configured.
+	;;
+*)
+	# Append new history lines to history file
+	HISTCONTROL="${HISTCONTROL:-}${HISTCONTROL:+:}autosave"
+	;;
+esac
+safe_append_preexec '_bash-it-history-auto-load'
+safe_append_prompt_command '_bash-it-history-auto-save'
+
 function __powerline_left_segment {
   local OLD_IFS="${IFS}"; IFS="|"
   local params=( $1 )
@@ -34,8 +47,6 @@ function __powerline_prompt_command {
   LAST_SEGMENT_COLOR=""
   PROMPT_AFTER="${POWERLINE_PROMPT_AFTER}"
 
-  _save-and-reload-history "${HISTORY_AUTOSAVE:-0}"
-
   ## left prompt ##
   for segment in $POWERLINE_PROMPT; do
     local info="$(__powerline_${segment}_prompt)"