#!/bin/bash

unset CDPATH
. "$(cd `dirname $0`/..; pwd)/bin/logstash.lib.sh"
setup

if [ -z "$1" ]; then
  if [ -r /etc/logstash/startup.options ]; then
    OPTIONS_PATH=/etc/logstash/startup.options
  elif [ -r "${LOGSTASH_HOME}"/config/startup.options ]; then
    OPTIONS_PATH="${LOGSTASH_HOME}"/config/startup.options
  fi
elif [ "$1" == "-h" ] || [ "$1" == "--help" ]; then
  echo "Usage: system-install [OPTIONSFILE] [STARTUPTYPE] [VERSION]"
  echo
  echo "NOTE: These arguments are ordered, and co-dependent"
  echo
  echo "OPTIONSFILE: Full path to a startup.options file"
  echo "OPTIONSFILE is required if STARTUPTYPE is specified, but otherwise looks first"
  echo "in $LOGSTASH_HOME/config/startup.options and then /etc/logstash/startup.options"
  echo "Last match wins"
  echo
  echo "STARTUPTYPE: e.g. sysv, upstart, systemd, etc."
  echo "OPTIONSFILE is required to specify a STARTUPTYPE."
  echo
  echo "VERSION: The specified version of STARTUPTYPE to use.  The default is usually"
  echo "preferred here, so it can safely be omitted."
  echo "Both OPTIONSFILE & STARTUPTYPE are required to specify a VERSION."
  echo
  echo "For more information, see https://github.com/jordansissel/pleaserun"
  exit 0
else
  if [ -r "$1" ]; then
    echo "Using provided startup.options file: ${1}"
    OPTIONS_PATH="$1"
  else
    echo "$1 is not a file path"
    echo "To manually specify a startup style, put the path to startup.options as the "
    echo "first argument, followed by the startup style (sysv, upstart, systemd)"
    exit 1
  fi
fi

# Read in the env vars in the selected startup.options file...
. "${OPTIONS_PATH}"

old_IFS=$IFS
IFS=$'\n'
lines=($(grep -v ^# ${OPTIONS_PATH} | tr -d '"' | grep -v '^LS_OPTS=' | grep \= | grep -v '\=$' | grep -v '\=\"\"$'))
IFS=$old_IFS

ENV_VAR_ARGS=()

for line in ${lines[@]}; do
  var=$(echo $line | awk -F\= '{print $1}')
  if [ "x${!var}" != "x" ]; then
    ENV_VAR_ARGS+=('--environment-variables')
    ENV_VAR_ARGS+=("${var}=${!var}")
  fi
done

# bin/logstash-plugin is a short lived ruby script thus we can use aggressive "faster starting JRuby options"
# see https://github.com/jruby/jruby/wiki/Improving-startup-time
export JRUBY_OPTS="$JRUBY_OPTS -J-XX:+TieredCompilation -J-XX:TieredStopAtLevel=1 -J-noverify -X-C -Xcompile.invokedynamic=false"

tempfile=$(mktemp)
if [ "x${PRESTART}" == "x" ]; then
  opts=("--log" "$tempfile" "--overwrite" "--install" "--name" "${SERVICE_NAME}" "--user" "${LS_USER}" "--group" "${LS_GROUP}" "--description" "${SERVICE_DESCRIPTION}" "--nice" "${LS_NICE}" "--limit-open-files" "${LS_OPEN_FILES}")
else
  opts=("--log" "$tempfile" "--overwrite" "--install" "--name" "${SERVICE_NAME}" "--user" "${LS_USER}" "--group" "${LS_GROUP}" "--description" "${SERVICE_DESCRIPTION}" "--nice" "${LS_NICE}" "--limit-open-files" "${LS_OPEN_FILES}" "--prestart" "${PRESTART}")
fi

if [[ $2 ]]; then
  echo "Manually creating startup for specified platform: ${2}"
  opts+=('--platform')
  opts+=($2)
fi

if [[ $3 ]]; then
  echo "Manually creating startup for specified platform (${2}) version: ${3}"
  opts+=('--version')
  opts+=($3)
fi

allopts=("${ENV_VAR_ARGS[@]}" "${opts[@]}")
program="$(cd `dirname $0`/..; pwd)/bin/logstash"

$(ruby_exec "${LOGSTASH_HOME}/lib/systeminstall/pleasewrap.rb" "${allopts[@]}" ${program} ${LS_OPTS})
exit_code=$?

if [ $exit_code -ne 0 ]; then
  cat $tempfile
  echo "Unable to install system startup script for Logstash."
else
  echo "Successfully created system startup script for Logstash"
fi
rm $tempfile