From 74cd9cb1a795e22f7943d5455c45aacb93177354 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Skytt=C3=A4?= <ville.skytta@iki.fi>
Date: Wed, 1 Nov 2017 09:16:37 +0200
Subject: [PATCH] Exit with 0 and output usage to stdout with --help

---
 wait-for-it.sh | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/wait-for-it.sh b/wait-for-it.sh
index 071c2be..3dec04a 100755
--- a/wait-for-it.sh
+++ b/wait-for-it.sh
@@ -7,7 +7,8 @@ echoerr() { if [[ $WAITFORIT_QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }
 
 usage()
 {
-    cat << USAGE >&2
+    [[ $1 ]] && out=2 || out=1
+    cat << USAGE >&$out
 Usage:
     $WAITFORIT_cmdname host:port [-s] [-t timeout] [-- command args]
     -h HOST | --host=HOST       Host or IP under test
@@ -19,7 +20,7 @@ Usage:
                                 Timeout in seconds, zero for no timeout
     -- COMMAND ARGS             Execute command with args after the test finishes
 USAGE
-    exit 1
+    exit ${1:-0}
 }
 
 wait_for()
@@ -126,14 +127,14 @@ do
         ;;
         *)
         echoerr "Unknown argument: $1"
-        usage
+        usage 1
         ;;
     esac
 done
 
 if [[ "$WAITFORIT_HOST" == "" || "$WAITFORIT_PORT" == "" ]]; then
     echoerr "Error: you need to provide a host and port to test."
-    usage
+    usage 1
 fi
 
 WAITFORIT_TIMEOUT=${WAITFORIT_TIMEOUT:-15}