Class: LogStash::Runner

Inherits:
Object
  • Object
show all
Includes:
Program
Defined in:
lib/logstash/runner.rb

Instance Method Summary collapse

Methods included from Program

#exit

Instance Method Details

#main(args) ⇒ Object 



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# File 'lib/logstash/runner.rb', line 16

def main(args)
  require "logstash/util"
  require "logstash/util/java_version"
  require "stud/trap"
  require "stud/task"
  @startup_interruption_trap = Stud::trap("INT") { puts "Interrupted"; exit 0 }

  LogStash::Util::set_thread_name(self.class.name)

  if RUBY_VERSION < "1.9.2"
    $stderr.puts "Ruby 1.9.2 or later is required. (You are running: " + RUBY_VERSION + ")"
    return 1
  end

  # Print a warning to STDERR for bad java versions
  LogStash::Util::JavaVersion.warn_on_bad_java_version

  Stud::untrap("INT", @startup_interruption_trap)

  task = run(args)
  exit(task.wait)
end

#run(args) ⇒ Object

def self.main



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# File 'lib/logstash/runner.rb', line 39

def run(args)
  command = args.shift
  commands = {
    "version" => lambda do
      require "logstash/agent"
      agent_args = ["--version"]
      if args.include?("--verbose")
        agent_args << "--verbose"
      end
      return LogStash::Agent.run($0, agent_args)
    end,
    "irb" => lambda do
      require "irb"
      return IRB.start(__FILE__)
    end,
    "pry" => lambda do
      require "pry"
      return binding.pry
    end,
    "docgen" => lambda do
      require 'docs/asciidocgen'
      opts = OptionParser.new
      settings = {}
      opts.on("-o DIR", "--output DIR",
        "Directory to output to; optional. If not specified,"\
        "we write to stdout.") do |val|
        settings[:output] = val
      end
      args = opts.parse(ARGV)
      docs = LogStashConfigAsciiDocGenerator.new
      args.each do |arg|
        docs.generate(arg, settings)
      end
      return 0
    end,
    "agent" => lambda do
      require "logstash/agent"
      # Hack up a runner
      agent = LogStash::Agent.new("/bin/logstash agent", $0)
      begin
        agent.parse(args)
      rescue Clamp::HelpWanted => e
        show_help(e.command)
        return 0
      rescue Clamp::UsageError => e
        # If 'too many arguments' then give the arguments to
        # the next command. Otherwise it's a real error.
        raise if e.message != "too many arguments"
        remaining = agent.remaining_arguments
      end

      return agent.execute
    end
  } # commands

  if commands.include?(command)
    return Stud::Task.new { commands[command].call }
  else
    if command.nil?
      $stderr.puts "No command given"
    else
      if !%w(--help -h help).include?(command)
        # Emit 'no such command' if it's not someone asking for help.
        $stderr.puts "No such command #{command.inspect}"
      end
    end
    $stderr.puts %q[
Usage: logstash <command> [command args]
Run a command with the --help flag to see the arguments.
For example: logstash agent --help

Available commands:
agent - runs the logstash agent
version - emits version info about this logstash
]
    #$stderr.puts commands.keys.map { |s| "  #{s}" }.join("\n")
    return Stud::Task.new { 1 }
  end
end