old_contents: from coalib.bearlib.abstractions.Linter import linter
  from dependency_management.requirements.CabalRequirement import (
      CabalRequirement)
  
  
  @linter(executable='ghc-mod',
          output_format='regex',
          output_regex=r'.+:(?P<line>\d+):(?P<column>\d+):'
                       r'(?P<message>.+)')
  class GhcModBear:
      """
      Syntax checking with ``ghc`` for Haskell files.
  
      See <https://hackage.haskell.org/package/ghc-mod> for more information!
      """
  
      LANGUAGES = {'Haskell'}
      REQUIREMENTS = {CabalRequirement(package='ghc-mod', version='5.6.0')}
      AUTHORS = {'The coala developers'}
      AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
      LICENSE = 'AGPL-3.0'
      ASCIINEMA_URL = 'https://asciinema.org/a/98873'
      CAN_DETECT = {'Syntax'}
  
      @staticmethod
      def create_arguments(filename, file, config_file):
          # -b '. ' is the argument given for ghc-mod for seperation of messages
          return '-b', '. ', 'check', filename
  
new_contents: from coalib.bearlib.abstractions.Linter import linter
  from dependency_management.requirements.AnyOneOfRequirements import (
      AnyOneOfRequirements)
  from dependency_management.requirements.CabalRequirement import (
      CabalRequirement)
  from dependency_management.requirements.DistributionRequirement import (
      DistributionRequirement)
  
  
  @linter(executable='ghc-mod',
          output_format='regex',
          output_regex=r'.+:(?P<line>\d+):(?P<column>\d+):'
                       r'(?P<message>.+)')
  class GhcModBear:
      """
      Syntax checking with ``ghc`` for Haskell files.
  
      See <https://hackage.haskell.org/package/ghc-mod> for more information!
      """
  
      LANGUAGES = {'Haskell'}
      REQUIREMENTS = {
          AnyOneOfRequirements(
              [CabalRequirement('ghc-mod', '5.6.0'),
               DistributionRequirement('ghc-mod')
               ]
          ),
      }
      AUTHORS = {'The coala developers'}
      AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
      LICENSE = 'AGPL-3.0'
      ASCIINEMA_URL = 'https://asciinema.org/a/98873'
      CAN_DETECT = {'Syntax'}
  
      @staticmethod
      def create_arguments(filename, file, config_file):
          # -b '. ' is the argument given for ghc-mod for seperation of messages
          return '-b', '. ', 'check', filename
  
subject: Add DistributionRequirement