#!/bin/sh

set -e


[ -f /etc/default/dcache ] && . /etc/default/dcache
[ -f /etc/dcache.env ] && . /etc/dcache.env

if [ -z "$DCACHE_HOME" ]; then
DCACHE_HOME="/usr/share/dcache"
fi
if [ ! -d "$DCACHE_HOME" ]; then
echo "$DCACHE_HOME is not a directory"
exit 2
fi

DCACHE_CLASSPATH=${DCACHE_HOME}/classes/*
DCACHE_DEFAULTS=${DCACHE_HOME}/defaults
DCACHE_CACHED_CONFIG=/var/lib/dcache/config/cache
. ${DCACHE_HOME}/lib/loadConfig.sh
if [ "$(id -u)" -eq 0                                       -a -f /lib/systemd/system-generators/dcache-generator  -a "$(basename $0)" != "dcache-generator"              -
a -f /bin/systemctl ]; then
for unit in /run/systemd/generator/dcache@*.service; do
if [ "$DCACHE_CACHED_CONFIG" -nt "$unit" ]; then
systemctl daemon-reload
break
fi
done
fi


wantdir="$1/dcache.service.wants"
mkdir "$wantdir"

for domain in $(getProperty dcache.domains); do
    RESTART_DELAY="$(getProperty dcache.restart.delay "$domain")"
    USER="$(getProperty dcache.user "$domain")"
    JAVA_OPTIONS="$(getProperty dcache.java.options "$domain")"
    HOME="$(getProperty dcache.home)"
    CLASSPATH="$(printClassPath "$domain")"
    JAVA_LIBRARY_PATH="$(getProperty dcache.java.library.path "$domain")"

    cat <<-EOF > "$1/dcache@$domain.service"
	[Unit]
	Description=dCache $domain domain
	After=network.target zookeeper.service
	PartOf=dcache.service
	ReloadPropagatedFrom=dcache.service
	Before=dcache.service

	[Service]
	Type=simple
	WorkingDirectory=${HOME}
	Restart=always
	RestartSec=${RESTART_DELAY}
	SuccessExitStatus=143
	ProtectSystem=full
	ProtectHome=true
	NoNewPrivileges=true
	StandardOutput=journal
	SyslogIdentifier=dcache@$domain
	Environment="CLASSPATH=$CLASSPATH" "LD_LIBRARY_PATH=$JAVA_LIBRARY_PATH"
	$( [ -z "$USER" ] || echo "User=$USER" )
	ExecStart=${JAVA} ${JAVA_OPTIONS} "-Ddcache.home=$HOME" "-Ddcache.paths.defaults=${DCACHE_DEFAULTS}" org.dcache.boot.BootLoader start ${domain}

	[Install]
	WantedBy=default.target
	EOF

    ln -s "$1/dcache@$domain.service" "$wantdir/dcache@$domain.service"
done