Class: Rubocop::CLI

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

Overview

The CLI is a class responsible of handling all the command line interface logic.

Constant Summary collapse

DEFAULT_FORMATTER = 
'progress'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/rubocop/cli.rb', line 18

def initialize
  @cops = Cop::Cop.all
  @errors = []
  @options = {}
  ConfigStore.prepare
end

Instance Attribute Details

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/rubocop/cli.rb', line 14

def options
  @options
end

#wants_to_quit ⇒ Object Also known as: wants_to_quit?

If set true while running, RuboCop will abort processing and exit gracefully.



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# File 'lib/rubocop/cli.rb', line 13

def wants_to_quit
  @wants_to_quit
end

Class Method Details

.parse(file) {|source_buffer| ... } ⇒ Object

Yields:

  • (source_buffer) 


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# File 'lib/rubocop/cli.rb', line 277

def self.parse(file)
  parser = Parser::CurrentRuby.new

  # On JRuby and Rubinius, there's a risk that we hang in
  # tokenize() if we don't set the all errors as fatal flag.
  parser.diagnostics.all_errors_are_fatal = RUBY_ENGINE != 'ruby'
  parser.diagnostics.ignore_warnings      = false

  diagnostics = []
  parser.diagnostics.consumer = lambda do |diagnostic|
    diagnostics << diagnostic
  end

  source_buffer = Parser::Source::Buffer.new(file, 1)
  yield source_buffer

  begin
    ast, comments, tokens = parser.tokenize(source_buffer)
  rescue Parser::SyntaxError # rubocop:disable HandleExceptions
    # All errors are in diagnostics. No need to handle exception.
  end

  if tokens
    tokens = tokens.map do |t|
      type, details = *t
      text, range = *details
      Rubocop::Cop::Token.new(range, type, text)
    end
  end

  syntax_offences = diagnostics.map do |d|
    Cop::Offence.new(d.level, d.location, "#{d.message}",
                     'Syntax')
  end

  source = source_buffer.source.split($RS)

  [ast, comments, tokens, source_buffer, source, syntax_offences]
end

Instance Method Details

#convert_deprecated_options!(args) ⇒ Object

rubocop:enable MethodLength



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# File 'lib/rubocop/cli.rb', line 214

def convert_deprecated_options!(args)
  args.map! do |arg|
    case arg
    when '-e', '--emacs'
      deprecate("#{arg} option", '--format emacs', '1.0.0')
      %w(--format emacs)
    else
      arg
    end
  end.flatten!
end

#disabled_lines_in(source) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 246

def disabled_lines_in(source)
  disabled_lines = Hash.new([])
  disabled_section = {}
  regexp = '# rubocop : (%s)\b ((?:\w+,? )+)'.gsub(' ', '\s*')
  section_regexp = '^\s*' + sprintf(regexp, '(?:dis|en)able')
  single_line_regexp = '\S.*' + sprintf(regexp, 'disable')

  source.each_with_index do |line, ix|
    each_mentioned_cop(/#{section_regexp}/, line) do |cop_name, kind|
      disabled_section[cop_name] = (kind == 'disable')
    end
    disabled_section.keys.each do |cop_name|
      disabled_lines[cop_name] += [ix + 1] if disabled_section[cop_name]
    end

    each_mentioned_cop(/#{single_line_regexp}/, line) do |cop_name, kind|
      disabled_lines[cop_name] += [ix + 1] if kind == 'disable'
    end
  end
  disabled_lines
end

#display_error_summary(errors) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 235

def display_error_summary(errors)
  return if errors.empty?
  plural = errors.count > 1 ? 's' : ''
  puts "\n#{errors.count} error#{plural} occurred:".color(:red)
  errors.each { |error| puts error }
  puts 'Errors are usually caused by RuboCop bugs.'
  puts 'Please, report your problems to RuboCop\'s issue tracker.'
  puts 'Mention the following information in the issue report:'
  puts Rubocop::Version.version(true)
end

#each_mentioned_cop(regexp, line) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 268

def each_mentioned_cop(regexp, line)
  match = line.match(regexp)
  if match
    kind, cops = match.captures
    cops = Cop::Cop.all.map(&:cop_name).join(',') if cops.include?('all')
    cops.split(/,\s*/).each { |cop_name| yield cop_name, kind }
  end
end

#handle_error(e, message) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 132

def handle_error(e, message)
  @errors << message
  warn message
  if @options[:debug]
    puts e.message, e.backtrace
  else
    warn 'To see the complete backtrace run rubocop -d.'
  end
end

#inspect_file(file) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 79

def inspect_file(file)
  begin
    ast, comments, tokens, source_buffer, source, syntax_offences =
      CLI.parse(file) { |sb| sb.read }

  rescue Encoding::UndefinedConversionError, ArgumentError => e
    handle_error(e, "An error occurred while parsing #{file}.".color(:red))
    return []
  end

  # If we got any syntax errors, return only the syntax offences.
  # Parser may return nil for AST even though there are no syntax errors.
  # e.g. sources which contain only comments
  return syntax_offences unless syntax_offences.empty?

  config = ConfigStore.for(file)
  disabled_lines = disabled_lines_in(source)

  set_config_for_all_cops(config)

  @cops.reduce([]) do |offences, cop_class|
    cop_name = cop_class.cop_name
    if config.cop_enabled?(cop_name)
      cop = setup_cop(cop_class, disabled_lines)
      if !@options[:only] || @options[:only] == cop_name
        begin
          cop.inspect(source_buffer, source, tokens, ast, comments)
        rescue => e
          handle_error(e,
                       "An error occurred while #{cop.name}".color(:red) +
                       " cop was inspecting #{file}.".color(:red))
        end
      end
      offences.concat(cop.offences)
    end
    offences
  end.sort
end

#parse_options(args) ⇒ Object

rubocop:disable MethodLength



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# File 'lib/rubocop/cli.rb', line 143

def parse_options(args)
  convert_deprecated_options!(args)

  OptionParser.new do |opts|
    opts.banner = 'Usage: rubocop [options] [file1, file2, ...]'

    opts.on('-d', '--debug', 'Display debug info.') do |d|
      @options[:debug] = d
    end
    opts.on('-L', '--list-cops', 'List class name of cops.') do |c|
      @options[:list_cops] = c
    end
    opts.on('-c', '--config FILE', 'Specify configuration file.') do |f|
      @options[:config] = f
      ConfigStore.set_options_config(@options[:config])
    end
    opts.on('--only COP', 'Run just one cop.') do |s|
      @options[:only] = s
      validate_only_option
    end
    opts.on('-f', '--format FORMATTER',
            'Choose an output formatter. This option',
            'can be specified multiple times to enable',
            'multiple formatters at the same time.',
            '  [p]rogress (default)',
            '  [s]imple',
            '  [c]lang',
            '  [e]macs',
            '  [j]son',
            '  custom formatter class name') do |key|
      @options[:formatters] ||= []
      @options[:formatters] << [key]
    end
    opts.on('-o', '--out FILE',
            'Write output to a file instead of STDOUT.',
            'This option applies to the previously',
            'specified --format, or the default format',
            'if no format is specified.') do |path|
      @options[:formatters] ||= [[DEFAULT_FORMATTER]]
      @options[:formatters].last << path
    end
    opts.on('-r', '--require FILE', 'Require Ruby file.') do |f|
      require f
    end
    opts.on('-R', '--rails', 'Run extra Rails cops.') do |r|
      @options[:rails] = r
    end
    opts.on('-l', '--lint', 'Run only lint cops.') do |l|
      @options[:lint] = l
    end
    opts.on('-a', '--auto-correct', 'Auto-correct offences.') do |a|
      @options[:autocorrect] = a
    end
    opts.on('-s', '--silent', 'Silence summary.') do |s|
      @options[:silent] = s
    end
    opts.on('-n', '--no-color', 'Disable color output.') do |s|
      Sickill::Rainbow.enabled = false
    end
    opts.on('-v', '--version', 'Display version.') do
      puts Rubocop::Version.version(false)
      exit(0)
    end
    opts.on('-V', '--verbose-version', 'Display verbose version.') do
      puts Rubocop::Version.version(true)
      exit(0)
    end
  end.parse!(args)
end

#ruby_files(root = Dir.pwd) ⇒ Array

Finds all Ruby source files under the current or other supplied directory. A Ruby source file is defined as a file with the .rb extension or a file with no extension that has a ruby shebang line as its first line. It is possible to specify includes and excludes using the config file, so you can include other Ruby files like Rakefiles and gemspecs.

Parameters:

  • root (defaults to: Dir.pwd) —

    Root directory under which to search for ruby source files

Returns:

  • (Array) —

    Array of filenames



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# File 'lib/rubocop/cli.rb', line 347

def ruby_files(root = Dir.pwd)
  files = Dir["#{root}/**/*"].select { |file| FileTest.file?(file) }

  rb = []

  rb += files.select { |file| File.extname(file) == '.rb' }
  rb += files.select do |file|
    if File.extname(file) == '' && !excluded_file?(file)
      begin
        File.open(file) { |f| f.readline } =~ /#!.*ruby/
      rescue EOFError, ArgumentError => e
        log_error(e, "Unprocessable file #{file.inspect}: ")
        false
      end
    end
  end

  rb += files.select do |file|
    config = ConfigStore.for(file)
    config.file_to_include?(file)
  end

  rb.reject { |file| excluded_file?(file) }.uniq
end

#run(args = ARGV) ⇒ Fixnum

Entry point for the application logic. Here we do the command line arguments processing and inspect the target files

Returns:

  • (Fixnum) —

    UNIX exit code



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# File 'lib/rubocop/cli.rb', line 29

def run(args = ARGV)
  trap_interrupt

  begin
    parse_options(args)
  rescue => e
    $stderr.puts e.message
    return 1
  end

  # filter out Rails cops unless requested
  @cops.reject!(&:rails?) unless @options[:rails]

  # filter out style cops when --lint is passed
  @cops.select!(&:lint?) if @options[:lint]

  target_files = target_files(args)
  target_files.each(&:freeze).freeze
  inspected_files = []
  any_failed = false

  formatter_set.started(target_files)

  target_files.each do |file|
    break if wants_to_quit?

    puts "Scanning #{file}" if @options[:debug]
    formatter_set.file_started(file, {})

    offences = inspect_file(file)

    any_failed = true unless offences.empty?
    inspected_files << file
    formatter_set.file_finished(file, offences.freeze)
  end

  formatter_set.finished(inspected_files.freeze)
  formatter_set.close_output_files

  display_error_summary(@errors) unless @options[:silent]

  !any_failed && !wants_to_quit ? 0 : 1
end

#set_config_for_all_cops(config) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 118

def set_config_for_all_cops(config)
  @cops.each do |cop_class|
    cop_class.config = config.for_cop(cop_class.cop_name)
  end
end

#setup_cop(cop_class, disabled_lines = nil) ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 124

def setup_cop(cop_class, disabled_lines = nil)
  cop = cop_class.new
  cop.debug = @options[:debug] || @options[:list_cops]
  cop.autocorrect = @options[:autocorrect]
  cop.disabled_lines = disabled_lines[cop_class.cop_name] if disabled_lines
  cop
end

#target_files(args) ⇒ Array

Generate a list of target files by expanding globing patterns (if any). If args is empty recursively finds all Ruby source files under the current directory

Returns:

  • (Array) —

    array of filenames



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# File 'lib/rubocop/cli.rb', line 321

def target_files(args)
  return ruby_files if args.empty?

  files = []

  args.each do |target|
    if File.directory?(target)
      files += ruby_files(target.chomp(File::SEPARATOR))
    elsif target =~ /\*/
      files += Dir[target]
    else
      files << target
    end
  end

  files.map { |f| File.expand_path(f) }.uniq
end

#trap_interrupt ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 226

def trap_interrupt
  Signal.trap('INT') do
    exit!(1) if wants_to_quit?
    self.wants_to_quit = true
    $stderr.puts
    $stderr.puts 'Exiting... Interrupt again to exit immediately.'
  end
end

#validate_only_option ⇒ Object 



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# File 'lib/rubocop/cli.rb', line 73

def validate_only_option
  if @cops.none? { |c| c.cop_name == @options[:only] }
    fail ArgumentError, "Unrecognized cop name: #{@options[:only]}."
  end
end