Allow changing the languagetool download version

Author: pidefrem

language_tool_python/download_lt.py

@@ -31,7 +31,7 @@
 BASE_URL = os.environ.get('LTP_DOWNLOAD_HOST', 'https://www.languagetool.org/download/')
 FILENAME = 'LanguageTool-{version}.zip'
 
-LATEST_VERSION = '6.2'
+LT_DOWNLOAD_VERSION = '6.2'
 
 JAVA_VERSION_REGEX = re.compile(
     r'^(?:java|openjdk) version "(?P<major1>\d+)(|\.(?P<major2>\d+)\.[^"]+)"',
@@ -116,7 +116,7 @@ def http_get(url, out_file, proxies=None):
     if req.status_code == 403:  # Not found on AWS
         raise Exception('Could not find at URL {}.'.format(url))
     progress = tqdm.tqdm(unit="B", unit_scale=True, total=total,
-                         desc=f'Downloading LanguageTool {LATEST_VERSION}')
+                         desc=f'Downloading LanguageTool {LT_DOWNLOAD_VERSION}')
     for chunk in req.iter_content(chunk_size=1024):
         if chunk:  # filter out keep-alive new chunks
             progress.update(len(chunk))
@@ -148,7 +148,7 @@ def download_zip(url, directory):
     logger.info('Downloaded {} to {}.'.format(url, directory))
 
 
-def download_lt(language_tool_version: Optional[str] = LATEST_VERSION):
+def download_lt(language_tool_version: Optional[str] = LT_DOWNLOAD_VERSION):
     confirm_java_compatibility()
 
     download_folder = get_language_tool_download_path()

language_tool_python/server.py

@@ -12,7 +12,7 @@
 import urllib.parse
 
 from .config_file import LanguageToolConfig
-from .download_lt import download_lt
+from .download_lt import download_lt, LT_DOWNLOAD_VERSION
 from .language_tag import LanguageTag
 from .match import Match
 from .utils import (
@@ -45,10 +45,14 @@ class LanguageTool:
     _consumer_thread: threading.Thread = None
     _PORT_RE = re.compile(r"(?:https?://.*:|port\s+)(\d+)", re.I)
 
-    def __init__(self, language=None, motherTongue=None,
-                 remote_server=None, newSpellings=None,
-                 new_spellings_persist=True,
-                 host=None, config=None):
+    def __init__(
+            self, language=None, motherTongue=None,
+            remote_server=None, newSpellings=None,
+            new_spellings_persist=True,
+            host=None, config=None,
+            language_tool_download_version: str = LT_DOWNLOAD_VERSION
+    ):
+        self.language_tool_download_version = language_tool_download_version
         self._new_spellings = None
         self._new_spellings_persist = new_spellings_persist
         self._host = host or socket.gethostbyname('localhost')
@@ -276,7 +280,7 @@ def _start_server_on_free_port(self):
 
     def _start_local_server(self):
         # Before starting local server, download language tool if needed.
-        download_lt()
+        download_lt(self.language_tool_download_version)
         err = None
         try:
             if DEBUG_MODE: