old_contents: #!/usr/bin/env python
  import sys, os
  
  import chpl_arch
  import chpl_compiler
  import chpl_platform
  from utils import memoize
  import utils
  
  @memoize
  def get():
      comm_val = os.environ.get('CHPL_COMM')
      if not comm_val:
          platform_val = chpl_platform.get('target')
          compiler_val = chpl_compiler.get('target')
  
          # use ugni on cray-x* machines using the module and supported compiler
          #
          # Check that target arch is not knc. Don't use chpl_arch.get(), though,
          # since it already calls into this get() function. This check only
          # happens for X* systems using the Cray programming environment, so it
          # is safe to assume the relevant craype module will be used that sets
          # CRAY_CPU_TARGET.
          if (platform_val.startswith('cray-x') and
                  utils.using_chapel_module() and
                  compiler_val in ('cray-prgenv-gnu', 'cray-prgenv-intel') and
                  os.getenv('CRAY_CPU_TARGET', '') != 'knc'):
              comm_val = 'ugni'
          # automatically uses gasnet when on a cray-x* or cray-cs machine
          elif platform_val.startswith('cray-'):
              comm_val = 'gasnet'
          else:
              comm_val = 'none'
      return comm_val
  
  
  def _main():
      comm_val = get()
      sys.stdout.write("{0}\n".format(comm_val))
  
  
  if __name__ == '__main__':
      _main()
  
new_contents: #!/usr/bin/env python
  import sys, os
  
  import chpl_compiler
  import chpl_platform
  from utils import memoize
  import utils
  
  @memoize
  def get():
      comm_val = os.environ.get('CHPL_COMM')
      if not comm_val:
          platform_val = chpl_platform.get('target')
          compiler_val = chpl_compiler.get('target')
  
          # use ugni on cray-x* machines using the module and supported compiler
          #
          # Check that target arch is not knc. Don't use chpl_arch.get(), though,
          # since it already calls into this get() function. This check only
          # happens for X* systems using the Cray programming environment, so it
          # is safe to assume the relevant craype module will be used that sets
          # CRAY_CPU_TARGET.
          if (platform_val.startswith('cray-x') and
                  utils.using_chapel_module() and
                  compiler_val in ('cray-prgenv-gnu', 'cray-prgenv-intel') and
                  os.getenv('CRAY_CPU_TARGET', '') != 'knc'):
              comm_val = 'ugni'
          # automatically uses gasnet when on a cray-x* or cray-cs machine
          elif platform_val.startswith('cray-'):
              comm_val = 'gasnet'
          else:
              comm_val = 'none'
      return comm_val
  
  
  def _main():
      comm_val = get()
      sys.stdout.write("{0}\n".format(comm_val))
  
  
  if __name__ == '__main__':
      _main()
  
subject: remove unneeded chpl_arch import.