Update dependency to cysystemd

closes #8187

docs/advanced-setup.md

@@ -192,7 +192,7 @@ $RepeatedMsgReduction on
 
 ### Logging to journald
 
-This needs the `systemd` python package installed as the dependency, which is not available on Windows. Hence, the whole journald logging functionality is not available for a bot running on Windows.
+This needs the `cysystemd` python package installed as dependency (`pip install cysystemd`), which is not available on Windows. Hence, the whole journald logging functionality is not available for a bot running on Windows.
 
 To send Freqtrade log messages to `journald` system service use the `--logfile` command line option with the value in the following format:
 

freqtrade/loggers.py

@@ -103,7 +103,7 @@ def setup_logging(config: Config) -> None:
             logging.root.addHandler(handler_sl)
         elif s[0] == 'journald':  # pragma: no cover
             try:
-                from systemd.journal import JournaldLogHandler
+                from cysystemd.journal import JournaldLogHandler
             except ImportError:
                 raise OperationalException("You need the systemd python package be installed in "
                                            "order to use logging to journald.")

tests/conftest.py

@@ -2573,7 +2573,7 @@ def import_fails() -> None:
     realimport = builtins.__import__
 
     def mockedimport(name, *args, **kwargs):
-        if name in ["filelock", 'systemd.journal', 'uvloop']:
+        if name in ["filelock", 'cysystemd.journal', 'uvloop']:
             raise ImportError(f"No module named '{name}'")
         return realimport(name, *args, **kwargs)
 

tests/test_configuration.py

@@ -701,15 +701,16 @@ def test_set_loggers_journald(mocker):
               'logfile': 'journald',
               }
 
+    setup_logging_pre()
     setup_logging(config)
-    assert len(logger.handlers) == 2
+    assert len(logger.handlers) == 3
     assert [x for x in logger.handlers if type(x).__name__ == "JournaldLogHandler"]
     assert [x for x in logger.handlers if type(x) == logging.StreamHandler]
     # reset handlers to not break pytest
     logger.handlers = orig_handlers
 
 
-def test_set_loggers_journald_importerror(mocker, import_fails):
+def test_set_loggers_journald_importerror(import_fails):
     logger = logging.getLogger()
     orig_handlers = logger.handlers
     logger.handlers = []