feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/lib/third_party/oauthlib/signals.py

@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+"""
+    Implements signals based on blinker if available, otherwise
+    falls silently back to a noop. Shamelessly stolen from flask.signals:
+    https://github.com/mitsuhiko/flask/blob/master/flask/signals.py
+"""
+signals_available = False
+try:
+  from blinker import Namespace
+  signals_available = True
+except ImportError:  # noqa
+
+  class Namespace(object):
+
+    def signal(self, name, doc=None):
+      return _FakeSignal(name, doc)
+
+  class _FakeSignal(object):
+    """If blinker is unavailable, create a fake class with the same
+
+        interface that allows sending of signals but will fail with an
+        error on anything else.  Instead of doing anything on send, it
+        will just ignore the arguments and do nothing instead.
+        """
+
+    def __init__(self, name, doc=None):
+      self.name = name
+      self.__doc__ = doc
+
+    def _fail(self, *args, **kwargs):
+      raise RuntimeError('signalling support is unavailable '
+                         'because the blinker library is '
+                         'not installed.')
+
+    send = lambda *a, **kw: None
+    connect = disconnect = has_receivers_for = receivers_for = \
+        temporarily_connected_to = connected_to = _fail
+    del _fail
+
+
+# The namespace for code signals.  If you are not oauthlib code, do
+# not put signals in here.  Create your own namespace instead.
+_signals = Namespace()
+
+# Core signals.
+scope_changed = _signals.signal('scope-changed')