Allow deleting of UI only

freqtrade/commands/arguments.py

@@ -70,6 +70,8 @@ ARGS_PLOT_DATAFRAME = ["pairs", "indicators1", "indicators2", "plot_limit",
 ARGS_PLOT_PROFIT = ["pairs", "timerange", "export", "exportfilename", "db_url",
                     "trade_source", "timeframe"]
 
+ARGS_INSTALL_UI = ["erase_ui_only"]
+
 ARGS_SHOW_TRADES = ["db_url", "trade_ids", "print_json"]
 
 ARGS_HYPEROPT_LIST = ["hyperopt_list_best", "hyperopt_list_profitable",
@@ -361,7 +363,7 @@ class Arguments:
             help='Install FreqUI',
         )
         install_ui_cmd.set_defaults(func=start_install_ui)
-        self._build_args(optionlist=[], parser=install_ui_cmd)
+        self._build_args(optionlist=ARGS_INSTALL_UI, parser=install_ui_cmd)
 
         # Add Plotting subcommand
         plot_dataframe_cmd = subparsers.add_parser(

freqtrade/commands/cli_options.py

@@ -387,6 +387,12 @@ AVAILABLE_CLI_OPTIONS = {
         help='Clean all existing data for the selected exchange/pairs/timeframes.',
         action='store_true',
     ),
+    "erase_ui_only": Arg(
+        '--erase',
+        help="Clean UI folder, don't download new version.",
+        action='store_true',
+        default=False,
+    ),
     # Templating options
     "template": Arg(
         '--template',

freqtrade/commands/deploy_commands.py

@@ -191,8 +191,10 @@ def start_install_ui(args: Dict[str, Any]) -> None:
     dest_folder = Path(__file__).parents[1] / 'rpc/api_server/ui'
     # First make sure the assets are removed.
     clean_ui_subdir(dest_folder)
+    if args.get('erase_ui_only'):
+        logger.info("Erased UI directory content. Not downloading new version.")
+    else:
+        dl_url = get_ui_download_url()
 
-    dl_url = get_ui_download_url()
-
-    # Download a new version
-    download_and_install_ui(dest_folder, dl_url)
+        # Download a new version
+        download_and_install_ui(dest_folder, dl_url)

tests/commands/test_commands.py

@@ -565,11 +565,24 @@ def test_start_install_ui(mocker):
     args = [
         "install-ui",
     ]
-    start_install_ui(args)
+    start_install_ui(get_args(args))
     assert clean_mock.call_count == 1
     assert get_url_mock.call_count == 1
     assert download_mock.call_count == 1
 
+    clean_mock.reset_mock()
+    get_url_mock.reset_mock()
+    download_mock.reset_mock()
+
+    args = [
+        "install-ui",
+        "--erase",
+    ]
+    start_install_ui(get_args(args))
+    assert clean_mock.call_count == 1
+    assert get_url_mock.call_count == 0
+    assert download_mock.call_count == 0
+
 
 def test_clean_ui_subdir(mocker, tmpdir, caplog):
     mocker.patch("freqtrade.commands.deploy_commands.Path.is_dir",