Hotfix issue #574, bump version to 4.39.1

docs/main/changelog.rst

@@ -7,6 +7,12 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+4.39.1
+------
+- Fix bug `#574 <https://github.com/ets-labs/python-dependency-injector/issues/574>`_:
+  "``@inject`` breaks ``inspect.iscoroutinefunction``". Thanks to
+  `@burritoatspoton (Rafał Burczyński) <https://github.com/burritoatspoton>`_ for reporting the issue.
+
 4.39.0
 ------
 - Optimize injections and wiring from x1.5 to x7 times depending on the use case.

src/dependency_injector/__init__.py

@@ -1,6 +1,6 @@
 """Top-level package."""
 
-__version__ = "4.39.0"
+__version__ = "4.39.1"
 """Version number.
 
 :type: str

src/dependency_injector/_cwiring.pyx

@@ -9,23 +9,27 @@ import types
 from . import providers
 from .wiring import _Marker
 
+from .providers cimport Provider
+
 
 def _get_sync_patched(fn):
     @functools.wraps(fn)
     def _patched(*args, **kwargs):
         cdef object result
         cdef dict to_inject
+        cdef object arg_key
+        cdef Provider provider
 
         to_inject = kwargs.copy()
-        for injection, provider in _patched.__injections__.items():
+        for arg_key, provider in _patched.__injections__.items():
-            if injection not in kwargs or isinstance(kwargs[injection], _Marker):
+            if arg_key not in kwargs or isinstance(kwargs[arg_key], _Marker):
-                to_inject[injection] = provider()
+                to_inject[arg_key] = provider()
 
         result = fn(*args, **to_inject)
 
         if _patched.__closing__:
-            for injection, provider in _patched.__closing__.items():
+            for arg_key, provider in _patched.__closing__.items():
-                if injection in kwargs and not isinstance(kwargs[injection], _Marker):
+                if arg_key in kwargs and not isinstance(kwargs[arg_key], _Marker):
                     continue
                 if not isinstance(provider, providers.Resource):
                     continue
@@ -35,22 +39,24 @@ def _get_sync_patched(fn):
     return _patched
 
 
-def _get_async_patched(fn):
+async def _async_inject(object fn, tuple args, dict kwargs, dict injections, dict closings):
-    @functools.wraps(fn)
-    async def _patched(*args, **kwargs):
     cdef object result
     cdef dict to_inject
     cdef list to_inject_await = []
     cdef list to_close_await = []
+    cdef object arg_key
+    cdef Provider provider
 
     to_inject = kwargs.copy()
-        for injection, provider in _patched.__injections__.items():
+    for arg_key, provider in injections.items():
-            if injection not in kwargs or isinstance(kwargs[injection], _Marker):
+        if arg_key not in kwargs or isinstance(kwargs[arg_key], _Marker):
             provide = provider()
-                if _isawaitable(provide):
+            if provider.is_async_mode_enabled():
-                    to_inject_await.append((injection, provide))
+                to_inject_await.append((arg_key, provide))
+            elif _isawaitable(provide):
+                to_inject_await.append((arg_key, provide))
             else:
-                    to_inject[injection] = provide
+                to_inject[arg_key] = provide
 
     if to_inject_await:
         async_to_inject = await asyncio.gather(*(provide for _, provide in to_inject_await))
@@ -59,10 +65,9 @@ def _get_async_patched(fn):
 
     result = await fn(*args, **to_inject)
 
-        if _patched.__closing__:
+    if closings:
-            for injection, provider in _patched.__closing__.items():
+        for arg_key, provider in closings.items():
-                if injection in kwargs \
+            if arg_key in kwargs and isinstance(kwargs[arg_key], _Marker):
-                        and isinstance(kwargs[injection], _Marker):
                 continue
             if not isinstance(provider, providers.Resource):
                 continue
@@ -74,11 +79,6 @@ def _get_async_patched(fn):
 
     return result
 
-    # Hotfix for iscoroutinefunction() for Cython < 3.0.0; can be removed after migration to Cython 3.0.0+
-    _patched._is_coroutine = asyncio.coroutines._is_coroutine
-
-    return _patched
-
 
 cdef bint _isawaitable(object instance):
     """Return true if object can be passed to an ``await`` expression."""

src/dependency_injector/providers.pxd

@@ -25,6 +25,10 @@ cdef class Provider(object):
     cdef tuple __overrides
     cdef int __async_mode
 
+    cpdef bint is_async_mode_enabled(self)
+    cpdef bint is_async_mode_disabled(self)
+    cpdef bint is_async_mode_undefined(self)
+
     cpdef object _provide(self, tuple args, dict kwargs)
     cpdef void _copy_overridings(self, Provider copied, dict memo)
 

src/dependency_injector/providers.pyx

@@ -406,15 +406,15 @@ cdef class Provider(object):
         """
         self.__async_mode = ASYNC_MODE_UNDEFINED
 
-    def is_async_mode_enabled(self):
+    cpdef bint is_async_mode_enabled(self):
         """Check if async mode is enabled."""
         return self.__async_mode == ASYNC_MODE_ENABLED
 
-    def is_async_mode_disabled(self):
+    cpdef bint is_async_mode_disabled(self):
         """Check if async mode is disabled."""
         return self.__async_mode == ASYNC_MODE_DISABLED
 
-    def is_async_mode_undefined(self):
+    cpdef bint is_async_mode_undefined(self):
         """Check if async mode is undefined."""
         return self.__async_mode == ASYNC_MODE_UNDEFINED
 

src/dependency_injector/wiring.py

@@ -1,5 +1,5 @@
 """Wiring module."""
-
+import functools
 import inspect
 import importlib
 import importlib.machinery
@@ -895,4 +895,19 @@ _loader = AutoLoader()
 
 # Optimizations
 from ._cwiring import _get_sync_patched  # noqa
-from ._cwiring import _get_async_patched  # noqa
+from ._cwiring import _async_inject  # noqa
+
+
+# Wiring uses the following Python wrapper because there is
+# no possibility to compile a first-type citizen coroutine in Cython.
+def _get_async_patched(fn):
+    @functools.wraps(fn)
+    async def _patched(*args, **kwargs):
+        return await _async_inject(
+            fn,
+            args,
+            kwargs,
+            _patched.__injections__,
+            _patched.__closing__,
+        )
+    return _patched

tests/unit/wiring/test_introspection_py36.py

@@ -0,0 +1,22 @@
+"""Tests for compatibility of @inject-patched functions with asyncio and inspect module checks."""
+
+import asyncio
+import inspect
+
+from dependency_injector.wiring import inject
+
+
+def test_asyncio_iscoroutinefunction():
+    @inject
+    async def foo():
+        ...
+
+    assert asyncio.iscoroutinefunction(foo)
+
+
+def test_inspect_iscoroutinefunction():
+    @inject
+    async def foo():
+        ...
+
+    assert inspect.iscoroutinefunction(foo)