old_contents: """nginx plugin constants."""
  import pkg_resources
  
  
  CLI_DEFAULTS = dict(
      server_root="/etc/nginx",
      ctl="nginx",
  )
  """CLI defaults."""
  
  
  MOD_SSL_CONF_DEST = "options-ssl-nginx.conf"
  """Name of the mod_ssl config file as saved in `IConfig.config_dir`."""
  
  MOD_SSL_CONF_SRC = pkg_resources.resource_filename(
      "certbot_nginx", "options-ssl-nginx.conf")
  """Path to the nginx mod_ssl config file found in the Certbot
  distribution."""
  
  UPDATED_MOD_SSL_CONF_DIGEST = ".updated-options-ssl-nginx-conf-digest.txt"
  """Name of the hash of the updated or informed mod_ssl_conf as saved in `IConfig.config_dir`."""
  
  
  ALL_SSL_OPTIONS_HASHES = [
      '0f81093a1465e3d4eaa8b0c14e77b2a2e93568b0fc1351c2b87893a95f0de87c',
      '9a7b32c49001fed4cff8ad24353329472a50e86ade1ef9b2b9e43566a619612e',
      'a6d9f1c7d6b36749b52ba061fff1421f9a0a3d2cfdafbd63c05d06f65b990937',
      '7f95624dd95cf5afc708b9f967ee83a24b8025dc7c8d9df2b556bbc64256b3ff',
      '394732f2bbe3e5e637c3fb5c6e980a1f1b90b01e2e8d6b7cff41dde16e2a756d',
      '4b16fec2bcbcd8a2f3296d886f17f9953ffdcc0af54582452ca1e52f5f776f16',
  ]
  """SHA256 hashes of the contents of all versions of MOD_SSL_CONF_SRC"""
  
  def os_constant(key):
      # XXX TODO: In the future, this could return different constants
      #           based on what OS we are running under.  To see an
      #           approach to how to handle different OSes, see the
      #           apache version of this file.  Currently, we do not
      #           actually have any OS-specific constants on Nginx.
      """
      Get a constant value for operating system
  
      :param key: name of cli constant
      :return: value of constant for active os
      """
      return CLI_DEFAULTS[key]
  
  HSTS_ARGS = ['\"max-age=31536000\"', ' ', 'always']
  
  HEADER_ARGS = {'Strict-Transport-Security': HSTS_ARGS}
  
new_contents: """nginx plugin constants."""
  import pkg_resources
  import platform
  
  if(platform.system() == ('FreeBSD' or 'Darwin')):
      server_root_tmp = "/usr/local/etc/nginx"
  else:
      server_root_tmp = "/etc/nginx"
      
  CLI_DEFAULTS = dict(
      server_root=server_root_tmp
      ctl="nginx",
  )
  """CLI defaults."""
  
  
  MOD_SSL_CONF_DEST = "options-ssl-nginx.conf"
  """Name of the mod_ssl config file as saved in `IConfig.config_dir`."""
  
  MOD_SSL_CONF_SRC = pkg_resources.resource_filename(
      "certbot_nginx", "options-ssl-nginx.conf")
  """Path to the nginx mod_ssl config file found in the Certbot
  distribution."""
  
  UPDATED_MOD_SSL_CONF_DIGEST = ".updated-options-ssl-nginx-conf-digest.txt"
  """Name of the hash of the updated or informed mod_ssl_conf as saved in `IConfig.config_dir`."""
  
  
  ALL_SSL_OPTIONS_HASHES = [
      '0f81093a1465e3d4eaa8b0c14e77b2a2e93568b0fc1351c2b87893a95f0de87c',
      '9a7b32c49001fed4cff8ad24353329472a50e86ade1ef9b2b9e43566a619612e',
      'a6d9f1c7d6b36749b52ba061fff1421f9a0a3d2cfdafbd63c05d06f65b990937',
      '7f95624dd95cf5afc708b9f967ee83a24b8025dc7c8d9df2b556bbc64256b3ff',
      '394732f2bbe3e5e637c3fb5c6e980a1f1b90b01e2e8d6b7cff41dde16e2a756d',
      '4b16fec2bcbcd8a2f3296d886f17f9953ffdcc0af54582452ca1e52f5f776f16',
  ]
  """SHA256 hashes of the contents of all versions of MOD_SSL_CONF_SRC"""
  
  def os_constant(key):
      # XXX TODO: In the future, this could return different constants
      #           based on what OS we are running under.  To see an
      #           approach to how to handle different OSes, see the
      #           apache version of this file.  Currently, we do not
      #           actually have any OS-specific constants on Nginx.
      """
      Get a constant value for operating system
  
      :param key: name of cli constant
      :return: value of constant for active os
      """
      return CLI_DEFAULTS[key]
  
  HSTS_ARGS = ['\"max-age=31536000\"', ' ', 'always']
  
  HEADER_ARGS = {'Strict-Transport-Security': HSTS_ARGS}
  
subject: Update constants.py