Added jnlp slave launcher

resources/jenkins-slave

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+# The MIT License
+#
+#  Copyright (c) 2015, CloudBees, Inc.
+#
+#  Permission is hereby granted, free of charge, to any person obtaining a copy
+#  of this software and associated documentation files (the "Software"), to deal
+#  in the Software without restriction, including without limitation the rights
+#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#  copies of the Software, and to permit persons to whom the Software is
+#  furnished to do so, subject to the following conditions:
+#
+#  The above copyright notice and this permission notice shall be included in
+#  all copies or substantial portions of the Software.
+#
+#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+#  THE SOFTWARE.
+
+# Usage jenkins-slave.sh [options] -url http://jenkins SECRET SLAVE_NAME
+# Optional environment variables :
+# * JENKINS_TUNNEL : HOST:PORT for a tunnel to route TCP traffic to jenkins host, when jenkins can't be directly accessed over network
+# * JENKINS_URL : alternate jenkins URL
+
+if [ $# -eq 1 ]; then
+
+	# if `docker run` only has one arguments, we assume user is running alternate command like `bash` to inspect the image
+	exec "$@"
+
+else
+
+	# if -tunnel is not provided try env vars
+	if [[ "$@" != *"-tunnel "* ]]; then
+		if [ ! -z "$JENKINS_TUNNEL" ]; then
+			TUNNEL="-tunnel $JENKINS_TUNNEL"
+		fi
+	fi
+
+	if [ ! -z "$JENKINS_URL" ]; then
+		URL="-url $JENKINS_URL"
+	fi
+
+	if [ -z "$JNLP_PROTOCOL_OPTS" ]; then
+		echo "Warning: JnlpProtocol3 is disabled by default, use JNLP_PROTOCOL_OPTS to alter the behavior"
+		JNLP_PROTOCOL_OPTS="-Dorg.jenkinsci.remoting.engine.JnlpProtocol3.disabled=true"
+	fi
+
+	exec java $JAVA_OPTS $JNLP_PROTOCOL_OPTS -cp /usr/share/jenkins/slave.jar hudson.remoting.jnlp.Main -headless $TUNNEL $URL "$@"
+fi