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[pull] main from pallets:main #19

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Merged
pull merged 1 commit into from
Aug 25, 2026
Merged

[pull] main from pallets:main #19

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28 changes: 16 additions & 12 deletions src/quart/app.py
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Original file line number Diff line number Diff line change
Expand Up @@ -118,7 +118,7 @@
from .utils import file_path_to_path
from .utils import MustReloadError
from .utils import observe_changes
from .utils import restart
from .utils import run_reloader
from .utils import run_sync
from .wrappers import BaseRequestWebsocket
from .wrappers import Request
Expand Down Expand Up @@ -849,6 +849,10 @@ def _signal_handler(*_: Any) -> None:
if port is None:
port = int(sn_port or "5000")

if use_reloader and os.environ.get("QUART_RUN_MAIN") != "true":
run_reloader()
return

task = self.run_task(
host,
port,
Expand All @@ -858,34 +862,34 @@ def _signal_handler(*_: Any) -> None:
keyfile,
shutdown_trigger=shutdown_event.wait, # type: ignore
)
print(f" * Serving Quart app '{self.name}'") # noqa: T201
print(f" * Debug mode: {self.debug or False}") # noqa: T201
print(" * Please use an ASGI server (e.g. Hypercorn) directly in production") # noqa: T201
scheme = "https" if certfile is not None and keyfile is not None else "http"
print(f" * Running on {scheme}://{host}:{port} (CTRL + C to quit)") # noqa: T201

tasks = [loop.create_task(task)]

if use_reloader:
if os.environ.get("QUART_RUN_MAIN") == "true":
tasks.append(
loop.create_task(observe_changes(asyncio.sleep, shutdown_event))
)

reload_ = False
print(f" * Serving Quart app '{self.name}'") # noqa: T201
print(f" * Debug mode: {self.debug or False}") # noqa: T201
print(" * Please use an ASGI server (e.g. Hypercorn) directly in production") # noqa: T201
scheme = "https" if certfile is not None and keyfile is not None else "http"
print(f" * Running on {scheme}://{host}:{port} (CTRL + C to quit)") # noqa: T201

try:
loop.run_until_complete(asyncio.gather(*tasks))
except MustReloadError:
reload_ = True
pass
finally:
try:
_cancel_all_tasks(loop)
loop.run_until_complete(loop.shutdown_asyncgens())
loop.run_until_complete(loop.shutdown_default_executor())
finally:
asyncio.set_event_loop(None)
loop.close()

if reload_:
restart()
if shutdown_event.is_set():
sys.exit(3)

def run_task(
self,
Expand Down
19 changes: 12 additions & 7 deletions src/quart/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
import asyncio
import inspect
import os
import subprocess
import sys
from collections.abc import AsyncIterator
from collections.abc import Awaitable
Expand Down Expand Up @@ -135,13 +136,6 @@ async def observe_changes(
last_updates[path] = mtime


def restart() -> None:
# Restart this process (only safe for dev/debug)
executable = sys.executable
args = sys.orig_argv[1:]
os.execv(executable, [executable] + args)


async def cancel_tasks(tasks: set[asyncio.Task]) -> None:
# Cancel any pending, and wait for the cancellation to
# complete i.e. finish any remaining work.
Expand All @@ -156,3 +150,14 @@ def raise_task_exceptions(tasks: set[asyncio.Task]) -> None:
for task in tasks:
if not task.cancelled() and task.exception() is not None:
raise task.exception()


def run_reloader() -> None:
while True:
args = [sys.executable, *sys.orig_argv[1:]]
new_environ = os.environ.copy()
new_environ["QUART_RUN_MAIN"] = "true"
exit_code = subprocess.call(args, env=new_environ, close_fds=False)

if exit_code == 3:
sys.exit(0)
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