WIP

sanic/cli/app.py

@@ -59,10 +59,13 @@ Or, a path to a directory to run as a simple HTTP server:
             os.environ.get("SANIC_RELOADER_PROCESS", "") != "true"
         )
         self.args: List[Any] = []
+        self.groups: List[Group] = []
 
     def attach(self):
         for group in Group._registry:
-            group.create(self.parser).attach()
+            instance = group.create(self.parser)
+            instance.attach()
+            self.groups.append(instance)
 
     def run(self):
         # This is to provide backwards compat -v to display version
@@ -142,6 +145,8 @@ Or, a path to a directory to run as a simple HTTP server:
         return app
 
     def _build_run_kwargs(self):
+        for group in self.groups:
+            group.prepare(self.args)
         ssl: Union[None, dict, str, list] = []
         if self.args.tlshost:
             ssl.append(None)

sanic/cli/arguments.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from argparse import ArgumentParser, _ArgumentGroup
+from os import getpid
 from typing import List, Optional, Type, Union
 
 from sanic_routing import __version__ as __routing_version__  # type: ignore
@@ -38,6 +39,9 @@ class Group:
             "--no-" + args[0][2:], *args[1:], action="store_false", **kwargs
         )
 
+    def prepare(self, args) -> None:
+        ...
+
 
 class GeneralGroup(Group):
     name = None
@@ -91,21 +95,33 @@ class HTTPVersionGroup(Group):
         group.add_argument(
             "--http",
             dest="http",
+            action="append",
             type=int,
-            default=1,
+            default=0,
             help=(
-                "Which HTTP version to use: HTTP/1.1 or HTTP/3. Value should "
+                "Which HTTP version to use: HTTP/1.1 or HTTP/3. Value should\n"
-                "be either 1 or 3 [default 1]"
+                "be either 0, 1, or 3, where '0' means use whatever versions\n"
+                "are available [default 0]"
             ),
         )
+        group.add_argument(
+            "-1",
+            dest="http",
+            action="append_const",
+            const=1,
+            help=("Run Sanic server using HTTP/1.1"),
+        )
         group.add_argument(
             "-3",
             dest="http",
-            action="store_const",
+            action="append_const",
             const=3,
             help=("Run Sanic server using HTTP/3"),
         )
 
+    def prepare(self, args):
+        print(args.http)
+
 
 class SocketGroup(Group):
     name = "Socket binding"