#!/bin/bash
# Copyright 2019 Google LLC
#
# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://llvm.org/LICENSE.txt
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

SSD_ROOT="/mnt/disks/ssd0"
AGENT_ROOT="${SSD_ROOT}/agent"
SSH_KEY_SOURCE="/github-ssh-key"
SSH_KEY_TARGET="/home/jenkins/.ssh"

# wipe the local cache on restart
rm -rf "$SSD_ROOT"

# prepare root folder for Jenkins agent
mkdir -p "${AGENT_ROOT}"
chown -R jenkins:jenkins "${AGENT_ROOT}"

# prepare folder for ccache
mkdir -p "${CCACHE_DIR}"
chown -R jenkins:jenkins "${CCACHE_DIR}"

# copy ssh keys to user jenkins
mkdir -p ${SSH_KEY_TARGET}
cp ${SSH_KEY_SOURCE}/* ${SSH_KEY_TARGET}
chmod 700 ${SSH_KEY_TARGET}
chmod 600 ${SSH_KEY_TARGET}/*
chown -R jenkins:jenkins ${SSH_KEY_TARGET}

# start swarm agent as user jenkins
# description of arguments: https://wiki.jenkins.io/display/JENKINS/Swarm+Plugin
su jenkins -c "java -jar /scripts/swarm-client.jar -master http://jenkins-ui.jenkins.svc.cluster.local:8080 -executors 1 -fsroot ${AGENT_ROOT} -labels linux"