Add options to pytest parser to prevent starting live server

Author: vitalk

pytest_flask/plugin.py

@@ -113,6 +113,18 @@ def test_something(app):
             monkeypatch.setitem(app.config, key.upper(), value)
 
 
+def pytest_addoption(parser):
+    group = parser.getgroup('flask')
+    group.addoption('--start-live-server',
+                    action="store_true", dest="start_live_server", default=True,
+                    help="start server automatically when live_server "
+                         "fixture is applyed.")
+    group.addoption('--no-start-live-server',
+                    action="store_false", dest="start_live_server",
+                    help="don't start server automatically when live_server "
+                         "fixture is applyed.")
+
+
 def pytest_configure(config):
     config.addinivalue_line(
         'markers',