dockerdns-daemon.rb

#!/usr/local/rvm/bin/rvm-auto-ruby

require 'optparse'

options = { :action => :run }

daemonize_help = "run daemonized in the background (default: false)"
config_help = "the config file"
pidfile_help   = "the pid filename"
logfile_help   = "the log filename"
include_help   = "an additional $LOAD_PATH (may be used more than once)"
debug_help     = "set $DEBUG to true"
warn_help      = "enable warnings"

op = OptionParser.new
op.banner =  "An example of how to daemonize a long running Ruby process."
op.separator ""
op.separator "Usage: dockerdns-daemon [options]"
op.separator ""

op.separator ""
op.separator "Process options:"
op.on("-d", "--daemonize",   daemonize_help) {         options[:daemonize] = true  }
op.on("-c", "--config CONFIGFILE",      config_help)    { |value| options[:config]    = value }
op.on("-p", "--pid PIDFILE", pidfile_help)   { |value| options[:pidfile]   = value }
op.on("-l", "--log LOGFILE", logfile_help)   { |value| options[:logfile]   = value }

op.separator ""
op.separator "Ruby options:"
op.on("-I", "--include PATH", include_help) { |value| $LOAD_PATH.unshift(*value.split(":").map{|v| File.expand_path(v)}) }
op.on(      "--debug",        debug_help)   { $DEBUG = true }
op.on(      "--warn",         warn_help)    { $-w = true    }

op.separator ""
op.separator "Common options:"
op.on("-h", "--help")    { options[:action] = :help    }
op.on("-v", "--version") { options[:action] = :version }

op.separator ""
op.parse!(ARGV)

#==============================================================================
# EXECUTE script
#==============================================================================

require_relative 'lib/server.rb' unless options[:action] == :help

case options[:action]
when :help    then puts op.to_s
when :version then puts Server::VERSION
else
  Server.run!(options)
end