Reload extra files in the current directory with inotify

[davegaeddert]

It seems that adding an extra watch file in the current directory, like .env, will cause inotify to crash because the os.path.dirname(".env") == "". Using ./.env works though (dirname is then .) or an absolute path works too.

gunicorn/gunicorn/reloader.py

Lines 84 to 91 in a86ea1e

	def add_extra_file(self, filename):
	dirname = os.path.dirname(filename)
	if dirname in self._dirs:
	return
	self._watcher.add_watch(dirname, mask=self.event_mask)
	self._dirs.add(dirname)

Curious what you think? If this is something that should be allowed, then I wonder if you could just do something like this to protect against it:

if not dirname:
    dirname = "."

Thanks!

[pajod]

While Gunicorn should definitely not crash with an ugly message.. passing relative paths should probably be discouraged anyway, given the non-obvious (and as of now, undocumented) interaction with the --chdir setting.