From d96c5061d61f004680efcb56f418967457d228eb Mon Sep 17 00:00:00 2001
From: nemsia <nemsia@nemsia.org>
Date: Tue, 9 May 2017 22:44:48 +0200
Subject: [PATCH] [enh] add ynh_find_port helper

---
 scripts/_common.sh | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/scripts/_common.sh b/scripts/_common.sh
index a7f8ad0..6a452df 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -102,4 +102,20 @@ EOF
 ynh_remove_app_dependencies () {
     dep_app=${app//_/-}	# Replace all '_' by '-'
     ynh_package_autoremove ${dep_app}-ynh-deps	# Remove the fake package and its dependencies if they not still used.
-}
\ No newline at end of file
+}
+
+# Find a free port and return it
+#
+# example: port=$(ynh_find_port 8080)
+#
+# usage: ynh_find_port begin_port
+# | arg: begin_port - port to start to search
+ynh_find_port () {
+	port=$1
+	test -n "$port" || ynh_die "The argument of ynh_find_port must be a valid port."
+	while netcat -z 127.0.0.1 $port       # Check if the port is free
+	do
+		port=$((port+1))	# Else, pass to next port
+	done
+	echo $port
+}