remove selfhacked-util dependency

outer_join/__init__.py

@@ -16,11 +16,11 @@
     BaseTable as _BaseTable,
     Join as _Join,
 )
-from selfhacked.util.func import (
+
+from .util import (
+    cached_property,
     returns as _returns,
 )
-
-from .util import cached_property
 from .util.info import (
     ModelInfo as _ModelInfo,
     FieldInfo as _FieldInfo,

outer_join/util/__init__.py

@@ -1,8 +1,33 @@
+import typing as _typing
 from django.utils.functional import (
     cached_property as _cached_property,
 )
+from functools import (
+    wraps as _wraps,
+)
 
-cached_property = _cached_property
+from .typing import (
+    T as _T,
+)
 
 # PyCharm doesn't like aliases for cached_property, so we unify import from here
 # Avoid cleanup import by PyCharm
+cached_property = _cached_property
+
+
+class returns(object):
+    """
+    This code can be found in selfhacked-util
+    However it's the only thing we need from the package,
+    so we are copying the code here and getting rid of the dependency.
+    """
+
+    def __init__(self, type: _typing.Type[_T]):
+        self.__type = type
+
+    def __call__(self, func) -> _T:
+        @_wraps(func)
+        def __new_func(*args, **kwargs):
+            return self.__type(func(*args, **kwargs))
+
+        return __new_func

outer_join/util/info.py

@@ -9,11 +9,11 @@
 from django.forms import (
     model_to_dict as _model_to_dict,
 )
-from selfhacked.util.func import (
+
+from . import (
+    cached_property,
     returns as _returns,
 )
-
-from . import cached_property
 from .datatypes import (
     ImmutableDict as _ImmutableDict,
 )

setup.py

@@ -23,7 +23,6 @@
 
     install_requires=[
         'Django>=1.11',
-        'selfhacked-util @ https://github.com/SelfHacked/selfhacked-util/archive/master.zip',
     ],
 
     extras_require={