From eeb19aba418d03729721bf2f1e34e8e11368e1a5 Mon Sep 17 00:00:00 2001
From: Collin Simpson <xunoaib@gmail.com>
Date: Sun, 2 Aug 2020 18:38:49 -0400
Subject: [PATCH] Prevent multiple instances of sleep_weather.sh from running
 at once

---
 scripts/sleep_weather.sh | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/scripts/sleep_weather.sh b/scripts/sleep_weather.sh
index 393f771..c3de174 100755
--- a/scripts/sleep_weather.sh
+++ b/scripts/sleep_weather.sh
@@ -4,12 +4,23 @@
 
 fahrenheit=$1
 
+LOCKFILE=/tmp/.dracula-tmux-weather.lock
+
+ensure_single_process()
+{
+	# check for another running instance of this script and terminate it if found
+	[ -f $LOCKFILE ] && ps -p "$(cat $LOCKFILE)" -o cmd= | grep -F " ${BASH_SOURCE[0]}" && kill "$(cat $LOCKFILE)"
+	echo $$ > $LOCKFILE
+}
+
 main()
 {
+	ensure_single_process
+
 	current_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 	$current_dir/weather.sh > $current_dir/../data/weather.txt
-	
+
 	while tmux has-session &> /dev/null
 	do
 		$current_dir/weather.sh $fahrenheit > $current_dir/../data/weather.txt
@@ -20,6 +31,8 @@ main()
 			break
 		fi
 	done
+
+	rm $LOCKFILE
 }
 
 #run main driver function