class Rubocop::CLI

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