Module: Asciidoctor::Reducer::Cli

Defined in:
lib/asciidoctor/reducer/cli.rb

Class Method Summary collapse

Class Method Details

.parse(args) ⇒ Object 



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# File 'lib/asciidoctor/reducer/cli.rb', line 9

def parse args
  options = { attributes: {}, log_level: LOG_LEVELS['warn'], safe: :unsafe }

  opt_parser = ::OptionParser.new do |opts|
    opts.program_name = 'asciidoctor-reducer'
    opts.banner = <<~END
    Usage: #{opts.program_name} [OPTION]... FILE

    #{::Gem.loaded_specs['asciidoctor-reducer'].summary}

    END

    opts.on '-a KEY[=VALUE]', '--attribute=KEY[=VALUE]',
      'set a document attribute in the AsciiDoc document: [key, key!, key=value]',
      'may be specified multiple times' do |attr|
      key, val = attr.split '=', 2
      val ||= ''
      options[:attributes][key] = val
    end

    opts.on '--log-level LEVEL', %w(debug info warn error fatal),
      'set the minimum level of messages to log: [debug, info, warn, error, fatal] (default: warn)' do |level|
      options[:log_level] = level
    end

    opts.on '-o FILE', '--output=FILE', 'set the output filename or stream' do |file|
      options[:output_file] = file
    end

    opts.on '--preserve-conditionals', 'preserve preprocessor conditional directives in the reduced source' do
      options[:preserve_conditionals] = true
    end

    opts.on '-q', '--quiet', 'suppress all application log messages' do
      options[:log_level] = nil
    end

    opts.on '-rLIBRARY', '--require LIBRARY', 'require the specified library or libraries before reducing',
      'may be specified multiple times' do |path|
      (options[:requires] ||= []).concat path.split ','
    end

    opts.on '-S', '--safe-mode SAFE_MODE', ['unsafe', 'safe', 'server', 'secure'],
      'set safe mode level: [unsafe, safe, server, secure] (default: unsafe)' do |name|
      options[:safe] = name.to_sym
    end

    opts.on '--trace', 'trace the cause of application errors (default: false)' do
      options[:trace] = true
    end

    opts.on '-v', '--version', 'display the version information and exit' do
      print_version opts
      return 0
    end

    opts.on '-h', '--help', 'display this help text and exit' do
      print_help opts
      return 0
    end
  end

  if (args = opt_parser.parse args).empty?
    opt_parser.warn 'Please specify an AsciiDoc file to reduce.'
    print_help opt_parser
    1
  elsif args.size == 1
    if (requires = options.delete :requires)
      requires.uniq.each do |path|
        require path
      rescue ::LoadError
        $stderr.puts %(#{opt_parser.program_name}: '#{path}' could not be required (reason: #{$!.message}))
        return 1
      end
    end
    options[:input_file] = args[0]
    options[:output_file] = '-' unless options[:output_file]
    [0, options]
  else
    opt_parser.warn %(extra arguments detected (unparsed arguments: #{(args.drop 1).join ' '}))
    print_help opt_parser
    1
  end
rescue ::OptionParser::InvalidOption
  $stderr.puts %(#{opt_parser.program_name}: #{$!.message})
  print_help opt_parser
  1
end

.run(args = ARGV) ⇒ Object 



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# File 'lib/asciidoctor/reducer/cli.rb', line 98

def run args = ARGV
  code, options = parse (Array args)
  return code unless code == 0 && options
  trace = options.delete :trace
  old_logger = ::Asciidoctor::LoggerManager.logger
  if (log_level = options.delete :log_level)
    (options[:logger] = ::Asciidoctor::Logger.new $stderr).level = log_level
  else
    options[:logger] = nil
  end
  options[:to] = (output_file = options.delete :output_file) == '-' ? $stdout : (::Pathname.new output_file)
  input = (input_file = options.delete :input_file) == '-' ? $stdin : (::Pathname.new input_file)
  ::Asciidoctor::Reducer.reduce input, options
  0
rescue ::SignalException
  $stderr.puts if ::Interrupt === $!
  $!.signo
rescue
  raise $! if trace
  $stderr.puts %(asciidoctor-reducer: #{$!.message.delete_prefix 'asciidoctor: '})
  $stderr.puts '  Use --trace to show backtrace'
  1
ensure
  ::Asciidoctor::LoggerManager.logger = old_logger if old_logger
end