Catch sooner if gevent is not installed.

bazarr/main.py

@@ -2,7 +2,20 @@
 
 bazarr_version = '0.7.2'
 
-from gevent import monkey
+# Try to import gevent and exit if it's not available. This one is required to use websocket.
+try:
+    from gevent import monkey
+except ImportError as e:
+    logging.exception('BAZARR require gevent Python module to be installed using pip.')
+    try:
+        stop_file = open(os.path.join(args.config_dir, "bazarr.stop"), "w")
+    except Exception as e:
+        logging.error('BAZARR Cannot create bazarr.stop file.')
+    else:
+        stop_file.write('')
+        stop_file.close()
+        os._exit(0)
+
 monkey.patch_all()
 
 import gc
@@ -26,10 +39,10 @@ from init import *
 from update_db import *
 from notifier import update_notifier
 from logger import configure_logging, empty_log
+import gevent
 from gevent.pywsgi import WSGIServer
 from geventwebsocket import WebSocketError
 from geventwebsocket.handler import WebSocketHandler
-# from cherrypy.wsgiserver import CherryPyWSGIServer
 from io import BytesIO
 from six import text_type
 from beaker.middleware import SessionMiddleware
@@ -80,20 +93,6 @@ if "PYCHARM_HOSTED" in os.environ:
 else:
     bottle.ERROR_PAGE_TEMPLATE = bottle.ERROR_PAGE_TEMPLATE.replace('if DEBUG and', 'if')
 
-# Install gevent under user directory if it'S not already available. This one is required to use websocket.
-try:
-    import gevent
-except ImportError as e:
-    logging.exception('BAZARR require gevent Python module to be installed using pip.')
-    try:
-        stop_file = open(os.path.join(args.config_dir, "bazarr.stop"), "w")
-    except Exception as e:
-        logging.error('BAZARR Cannot create bazarr.stop file.')
-    else:
-        stop_file.write('')
-        stop_file.close()
-        os._exit(0)
-
 # Reset restart required warning on start
 conn = sqlite3.connect(os.path.join(args.config_dir, 'db', 'bazarr.db'), timeout=30)
 c = conn.cursor()