hosts.windows should be in DOS/CRLF format.

This patch fixes Ultimate-Hosts-Blacklist/Ultimate.Hosts.Blacklist#641.

Contributors:
  * @zcwitkowski

ultimate_hosts_blacklist/deployment_launcher/generator.py

@@ -53,6 +53,7 @@ def generate_next_file(
  input_files: List[str],
  template: Optional[str] = None,
  endline: Optional[str] = None,
+ write_mode: Optional[str] = "lf"
 ) -> None:
  """
  A general function which write into the next file.
@@ -71,6 +72,22 @@ def generate_next_file(
  The last line to write.
  """
 
+ windows_lf = "\r\n"
+ unix_lf = "\n"
+
+ if write_mode.lower() == "lf":
+ line_ending = unix_lf
+
+ if template:
+ template = template.replace(windows_lf, unix_lf)
+ elif write_mode.lower() == "crlf":
+ line_ending = windows_lf
+
+ if template:
+ template = template.replace(unix_lf, windows_lf)
+ else:
+ raise ValueError("<write_mode> not supported.")
+
  dir_helper = DirectoryHelper(directory_path)
 
  if dir_helper.exists():
@@ -94,15 +111,15 @@ def generate_next_file(
  logging.info("Started Generation of %r", destination)
 
  with open(
- destination, "a+", encoding="utf-8"
+ destination, "a+", encoding="utf-8", newline=line_ending
  ) as destination_file_stream:
  if i == 0 and template and not template_written:
  logging.debug("Writting template:\n%s", template)
  destination_file_stream.write(template)
 
  template_written = True
 
- destination_file_stream.write(f"{format_to_apply.format(line)}\n")
+ destination_file_stream.write(f"{format_to_apply.format(line)}{line_ending}")
 
  if destination_file_stream.tell() >= outputs.MAX_FILE_SIZE_IN_BYTES:
  logging.info(
@@ -305,9 +322,9 @@ def windows_hosts(*args: List[str]) -> None:
  args,
  template=template,
  endline="# END HOSTS LIST ### DO NOT EDIT THIS LINE AT ALL ###",
+ write_mode="crlf"
  )
 
-
 def readme_md(
  *, domains_files: List[str], ip_files: List[str], info_files: List[str]
 ) -> None: