From 8655cb290b91b6a12c2c0cd43630c32cc02512b0 Mon Sep 17 00:00:00 2001
From: denizs <denizs247@gmail.com>
Date: Fri, 28 Feb 2020 13:02:13 +0100
Subject: [PATCH] exit with error message if netcat not installed

---
 wait-for | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wait-for b/wait-for
index ddfc39e..9403bbd 100755
--- a/wait-for
+++ b/wait-for
@@ -20,9 +20,10 @@ USAGE
 }
 
 wait_for() {
+  type nc > /dev/null 2>&1 || { echo >&2 "wait-for requires nc to be installed.  Aborting."; exit 1; }
   for i in `seq $TIMEOUT` ; do
     nc -z "$HOST" "$PORT" > /dev/null 2>&1
-    
+
     result=$?
     if [ $result -eq 0 ] ; then
       if [ $# -gt 0 ] ; then