old_contents: from os.path import abspath, dirname, join
  
  from coalib.bearlib.abstractions.Linter import linter
  
  
  scalastyle_config_file = join(dirname(abspath(__file__)),
                                'scalastyle_config.xml')
  
  
  @linter(executable='java',
          output_format='regex',
          output_regex=r'(?P<severity>warning) file=.+ message=(?P<message>.+) '
                       r'line=(?P<line>\d+)(?: column=(?P<column>\d+))?')
  class ScalaLintBear:
      """
      Check Scala code for codestyle, but also semantical problems,
      e.g. cyclomatic complexity.
      """
  
      LANGUAGES = {'Scala'}
      AUTHORS = {'The coala developers'}
      AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
      LICENSE = 'AGPL-3.0'
      INCLUDE_LOCAL_FILES = {'scalastyle.jar', 'scalalint_config.xml'}
      CAN_DETECT = {'Formatting', 'Complexity'}
  
      def setup_dependencies(self):
          type(self).jar = self.download_cached_file(
              'https://oss.sonatype.org/content/repositories/releases/org/'
              'scalastyle/scalastyle_2.10/0.8.0/scalastyle_2.10-0.8.0-batch.jar',
              'scalastyle.jar')
  
      @staticmethod
      def create_arguments(filename, file, config_file,
                           scalalint_config: str=scalastyle_config_file):
          """
          :param scalalint_config: Path to a custom configuration file.
          """
          return ('-jar', ScalaLintBear.jar, filename, '--config',
                  scalalint_config)
  
new_contents: from os.path import abspath, dirname, join
  
  from coalib.bearlib.abstractions.Linter import linter
  from dependency_management.requirements.DistributionRequirement import (
      DistributionRequirement)
  
  
  scalastyle_config_file = join(dirname(abspath(__file__)),
                                'scalastyle_config.xml')
  
  
  @linter(executable='java',
          output_format='regex',
          output_regex=r'(?P<severity>warning) file=.+ message=(?P<message>.+) '
                       r'line=(?P<line>\d+)(?: column=(?P<column>\d+))?')
  class ScalaLintBear:
      """
      Check Scala code for codestyle, but also semantical problems,
      e.g. cyclomatic complexity.
      """
  
      LANGUAGES = {'Scala'}
      REQUIREMENTS = {DistributionRequirement(apt_get='default-jre')}
      AUTHORS = {'The coala developers'}
      AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
      LICENSE = 'AGPL-3.0'
      INCLUDE_LOCAL_FILES = {'scalastyle.jar', 'scalalint_config.xml'}
      CAN_DETECT = {'Formatting', 'Complexity'}
  
      def setup_dependencies(self):
          type(self).jar = self.download_cached_file(
              'https://oss.sonatype.org/content/repositories/releases/org/'
              'scalastyle/scalastyle_2.10/0.8.0/scalastyle_2.10-0.8.0-batch.jar',
              'scalastyle.jar')
  
      @staticmethod
      def create_arguments(filename, file, config_file,
                           scalalint_config: str=scalastyle_config_file):
          """
          :param scalalint_config: Path to a custom configuration file.
          """
          return ('-jar', ScalaLintBear.jar, filename, '--config',
                  scalalint_config)
  
subject: Add DistributionRequirement