#!/usr/bin/env bash
set -e

# checks and defaults
SWARM_JAR="$JENKINS_HOME"/swarm-client-"$SWARM_VERSION"-jar-with-dependencies.jar

[ -z "$SWARM_MASTER" ] && echo "SWARM_MASTER was not specified, enabling autodiscovery"
[ -z "$SWARM_NAME" ] && SWARM_NAME="$HOSTNAME"
[ -z "$SWARM_DESCRIPTION" ] && SWARM_DESCRIPTION="Swarm version: $SWARM_VERSION - Jenkins slave for docker jobs"

[ -z "$SWARM_CREDENTIALS_FILE" ] && SWARM_CREDENTIALS_FILE="/etc/jenkins-master/credentials"
[ -f $SWARM_CREDENTIALS_FILE ] && echo "SWARM_USERNAME=$(head -n1 $SWARM_CREDENTIALS_FILE \
                                        SWARM_PASSWORD=$(tail -n1 $SWARM_CREDENTIALS_FILE)"
# entrypoint
exec java -jar "$SWARM_JAR" \
          -fsroot "$JENKINS_HOME" \
          -noRetryAfterConnected \
          -showHostName \
          $([ -n "$SWARM_MASTER" ] && echo '-master "$SWARM_MASTER"' )\
          -name "$SWARM_NAME" \
          -description "$SWARM_DESCRIPTION" \
          -executors "${SWARM_EXECUTORS:-1}" \
          -mode "${SWARM_MODE:-exclusive}" \
          -labels "${SWARM_LABELS:-docker}" \
          -retry "${SWARM_RETRY:-10}" \
          -username "${SWARM_USERNAME:-admin}" \
          -password "${SWARM_PASSWORD:-passwerd}" \
          "$@"