Add environment variable to enable development mode

Closes #14530

trytond/doc/topics/start_server.rst

@@ -42,6 +42,7 @@ Following environment variables can be set:
  * ``TRYTOND_COROUTINE``: Use coroutine for concurrency.
  * ``TRYTOND_DATABASE_NAMES``: A list of database names in CSV format, using
    python default dialect.
+ * ``TRYTOND_DEV``: A boolean to enable development mode.
 
 .. warning:: You must manage to serve the static files from the web root.
 

trytond/trytond/commandline.py

@@ -75,6 +75,7 @@ def get_parser():
     parser.add_argument("-v", "--verbose", action='count',
         dest="verbose", default=0, help="increase verbosity")
     parser.add_argument('--dev', dest='dev', action='store_true',
+        default=bool(int(os.getenv('TRYTOND_DEV', 0))),
         help='enable development mode')
 
     logging_config = os.environ.get('TRYTOND_LOGGING_CONFIG')

trytond/trytond/wsgi.py

@@ -70,7 +70,7 @@ class TrytondWSGI(object):
                 })
         self.protocols = [JSONProtocol, XMLProtocol]
         self.error_handlers = []
-        self.dev = False
+        self.dev = bool(int(os.getenv('TRYTOND_DEV', 0)))
 
     def route(self, string, methods=None, defaults=None):
         def decorator(func):