Class: RDig::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/rdig.rb

Constant Summary collapse

OPTIONS = 
[
  ['--config',   '-c', GetoptLong::REQUIRED_ARGUMENT,
    "Read aplication configuration from CONFIG."],
  ['--help',     '-h', GetoptLong::NO_ARGUMENT,
    "Display this help message."],
  ['--query',   '-q', GetoptLong::REQUIRED_ARGUMENT,
    "Execute QUERY."],
  ['--version',  '-v', GetoptLong::NO_ARGUMENT,
   	"Display the program version."],
]

Instance Method Summary collapse

Instance Method Details

#command_line_options ⇒ Object

Return a list of the command line options supported by the program.



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# File 'lib/rdig.rb', line 228

def command_line_options
  OPTIONS.collect { |lst| lst[0..-2] }
end

#do_option(opt, value) ⇒ Object

Do the option defined by opt and value.



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# File 'lib/rdig.rb', line 233

def do_option(opt, value)
  case opt
  when '--help'
    help
    exit
  when '--config'
    options.config_file = value
  when '--query'
    options.query = value
  when '--version'
    exit
  else
    fail "Unknown option: #{opt}"
  end 
end

#handle_options ⇒ Object

Read and handle the command line options.



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# File 'lib/rdig.rb', line 250

def handle_options
  opts = GetoptLong.new(*command_line_options)
  opts.each { |opt, value| do_option(opt, value) }
end

#help ⇒ Object

Display the rake command line help.



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# File 'lib/rdig.rb', line 210

def help
  usage
  puts
  puts "Options are ..."
  puts
  OPTIONS.sort.each do |long, short, mode, desc|
    if mode == GetoptLong::REQUIRED_ARGUMENT
      if desc =~ /\b([A-Z]{2,})\b/
        long = long + "=#{$1}"
      end
    end
    printf "  %-20s (%s)\n", long, short
    printf "      %s\n", desc
  end
end

#load_configfile ⇒ Object

Load the configuration



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# File 'lib/rdig.rb', line 256

def load_configfile
  load File.expand_path(options.config_file)
end

#options ⇒ Object

Application options from the command line



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# File 'lib/rdig.rb', line 200

def options
  @options ||= OpenStruct.new
end

#run ⇒ Object

Run the rdig application.



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# File 'lib/rdig.rb', line 261

def run
  puts "RDig version #{RDIGVERSION}"
  handle_options
  begin
    load_configfile
  rescue
    puts $!.backtrace
    fail "No Configfile found!\n#{$!}"
  end

  puts "using Ferret #{Ferret::VERSION}"

  if options.query
    # query the index
    puts "executing query >#{options.query}<"
    results = RDig.searcher.search(options.query)
    puts "total results: #{results[:hitcount]}"
    results[:list].each { |result|
      puts <<-EOF
#{result[:url]}
  #{result[:title]}
  #{result[:extract]}

      EOF
    }
  else
    # rebuild index
    @crawler = Crawler.new
    @crawler.run
  end
end

#usage ⇒ Object

Display the program usage line.



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# File 'lib/rdig.rb', line 205

def usage
  puts "rdig -c configfile {options}"
end