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from __future__ import annotations
import logging
import warnings
from pathlib import Path
from socket import socket
from typing import TYPE_CHECKING, Callable
from watchgod import DefaultWatcher
from uvicorn.config import Config
from uvicorn.supervisors.basereload import BaseReload
if TYPE_CHECKING:
import os
DirEntry = os.DirEntry[str]
logger = logging.getLogger("uvicorn.error")
class CustomWatcher(DefaultWatcher):
def __init__(self, root_path: Path, config: Config):
default_includes = ["*.py"]
self.includes = [
default
for default in default_includes
if default not in config.reload_excludes
]
self.includes.extend(config.reload_includes)
self.includes = list(set(self.includes))
default_excludes = [".*", ".py[cod]", ".sw.*", "~*"]
self.excludes = [
default
for default in default_excludes
if default not in config.reload_includes
]
self.excludes.extend(config.reload_excludes)
self.excludes = list(set(self.excludes))
self.watched_dirs: dict[str, bool] = {}
self.watched_files: dict[str, bool] = {}
self.dirs_includes = set(config.reload_dirs)
self.dirs_excludes = set(config.reload_dirs_excludes)
self.resolved_root = root_path
super().__init__(str(root_path))
def should_watch_file(self, entry: "DirEntry") -> bool:
cached_result = self.watched_files.get(entry.path)
if cached_result is not None:
return cached_result
entry_path = Path(entry)
# cwd is not verified through should_watch_dir, so we need to verify here
if entry_path.parent == Path.cwd() and Path.cwd() not in self.dirs_includes:
self.watched_files[entry.path] = False
return False
for include_pattern in self.includes:
if str(entry_path).endswith(include_pattern):
self.watched_files[entry.path] = True
return True
if entry_path.match(include_pattern):
for exclude_pattern in self.excludes:
if entry_path.match(exclude_pattern):
self.watched_files[entry.path] = False
return False
self.watched_files[entry.path] = True
return True
self.watched_files[entry.path] = False
return False
def should_watch_dir(self, entry: "DirEntry") -> bool:
cached_result = self.watched_dirs.get(entry.path)
if cached_result is not None:
return cached_result
entry_path = Path(entry)
if entry_path in self.dirs_excludes:
self.watched_dirs[entry.path] = False
return False
for exclude_pattern in self.excludes:
if entry_path.match(exclude_pattern):
is_watched = False
if entry_path in self.dirs_includes:
is_watched = True
for directory in self.dirs_includes:
if directory in entry_path.parents:
is_watched = True
if is_watched:
logger.debug(
"WatchGodReload detected a new excluded dir '%s' in '%s'; "
"Adding to exclude list.",
entry_path.relative_to(self.resolved_root),
str(self.resolved_root),
)
self.watched_dirs[entry.path] = False
self.dirs_excludes.add(entry_path)
return False
if entry_path in self.dirs_includes:
self.watched_dirs[entry.path] = True
return True
for directory in self.dirs_includes:
if directory in entry_path.parents:
self.watched_dirs[entry.path] = True
return True
for include_pattern in self.includes:
if entry_path.match(include_pattern):
logger.info(
"WatchGodReload detected a new reload dir '%s' in '%s'; "
"Adding to watch list.",
str(entry_path.relative_to(self.resolved_root)),
str(self.resolved_root),
)
self.dirs_includes.add(entry_path)
self.watched_dirs[entry.path] = True
return True
self.watched_dirs[entry.path] = False
return False
class WatchGodReload(BaseReload):
def __init__(
self,
config: Config,
target: Callable[[list[socket] | None], None],
sockets: list[socket],
) -> None:
warnings.warn(
'"watchgod" is deprecated, you should switch '
"to watchfiles (`pip install watchfiles`).",
DeprecationWarning,
)
super().__init__(config, target, sockets)
self.reloader_name = "WatchGod"
self.watchers = []
reload_dirs = []
for directory in config.reload_dirs:
if Path.cwd() not in directory.parents:
reload_dirs.append(directory)
if Path.cwd() not in reload_dirs:
reload_dirs.append(Path.cwd())
for w in reload_dirs:
self.watchers.append(CustomWatcher(w.resolve(), self.config))
def should_restart(self) -> list[Path] | None:
self.pause()
for watcher in self.watchers:
change = watcher.check()
if change != set():
return list({Path(c[1]) for c in change})
return None
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