From 164ee66bc057b0d6321bde3a9e4e3ea210cc2077 Mon Sep 17 00:00:00 2001
From: Amr Alaa <n1amr1@gmail.com>
Date: Sat, 30 Jun 2018 20:58:12 +0200
Subject: [PATCH] Fix: Do not override values of HISTSIZE and SAVEHIST if
 configured previously

This causes history file to be truncated to 10000 lines on exit
---
 lib/history.zsh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/history.zsh b/lib/history.zsh
index 7d4e59d00..f24510eed 100644
--- a/lib/history.zsh
+++ b/lib/history.zsh
@@ -28,8 +28,8 @@ esac
 
 ## History file configuration
 [ -z "$HISTFILE" ] && HISTFILE="$HOME/.zsh_history"
-HISTSIZE=50000
-SAVEHIST=10000
+[ -z "$HISTSIZE" ] && HISTSIZE=50000
+[ -z "$SAVEHIST" ] && SAVEHIST=10000
 
 ## History command configuration
 setopt extended_history       # record timestamp of command in HISTFILE