class Byebug::Runner

def abort_with_err(msg)
  Byebug.errmsg(msg)
  abort
end

def debug_program(options)
  unless File.executable?(Byebug.debugged_program)
    output = `ruby -c "#{Byebug.debugged_program}" 2>&1`
    if $CHILD_STATUS.exitstatus != 0
      Byebug.puts output
      exit $CHILD_STATUS.exitstatus
    end
  end
  status = Byebug.debug_load(Byebug.debugged_program, options[:stop])
  Byebug.puts "#{status}\n#{status.backtrace}" if status
end

def debugged_program_from_argv
  abort_with_err('You must specify a program to debug...') if ARGV.empty?
  prog_script_try = which(ARGV.first)
  if prog_script_try == which('ruby')
    ARGV.shift
    return which(ARGV.first)
  end
  prog_script_try
end

def run
  opts = Byebug::Options.parse
  return Byebug.puts("\n  Running byebug #{VERSION}\n") if opts[:version]
  return Byebug.puts("#{opts.help}\n") if opts[:help]
  if opts[:remote]
    port, host = opts[:remote].pop.to_i, opts[:remote].pop || 'localhost'
    Byebug.puts "Connecting to byebug server #{host}:#{port}..."
    Byebug.start_client(host, port)
    return
  end
  Byebug.debugged_program = debugged_program_from_argv
  abort_with_err("The script doesn't exist") unless Byebug.debugged_program
  # Set up trace hook for byebug
  Byebug.start
  # load initrc script (e.g. .byebugrc)
  Byebug.run_init_script(StringIO.new) if opts[:rc]
  # Post Mortem mode status
  Byebug::Setting[:post_mortem] = opts[:'post-mortem']
  # Line Tracing Status
  Byebug::Setting[:linetrace] = opts[:trace]
  loop do
    debug_program(opts)
    break if opts[:quit]
    processor = Byebug::ControlCommandProcessor.new
    processor.process_commands
  end
end