execute

# File lib/rubygems/commands/query_command.rb, line 60
  def execute
    exit_code = 0

    name = options[:name]
    prerelease = options[:prerelease]

    if options[:installed] then
      if name.source.empty? then
        alert_error "You must specify a gem name"
        exit_code |= 4
      elsif installed? name, options[:version] then
        say "true"
      else
        say "false"
        exit_code |= 1
      end

      terminate_interaction exit_code
    end

    req = Gem::Requirement.default
    # TODO: deprecate for real
    dep = Gem::Deprecate.skip_during { Gem::Dependency.new name, req }

    if local? then
      if prerelease and not both? then
        alert_warning "prereleases are always shown locally"
      end

      if ui.outs.tty? or both? then
        say
        say "*** LOCAL GEMS ***"
        say
      end

      specs = Gem::Specification.find_all { |s|
        s.name =~ name and req =~ s.version
      }

      spec_tuples = specs.map do |spec|
        [[spec.name, spec.version, spec.original_platform, spec], :local]
      end

      output_query_results spec_tuples
    end

    if remote? then
      if ui.outs.tty? or both? then
        say
        say "*** REMOTE GEMS ***"
        say
      end

      all = options[:all]

      fetcher = Gem::SpecFetcher.fetcher
      spec_tuples = fetcher.find_matching dep, all, false, prerelease

      spec_tuples += fetcher.find_matching dep, false, false, true if
        prerelease and all

      output_query_results spec_tuples
    end
  end