Remove non-version metadata hack (#1268)

* Remove non-version metadata hack

As per our deprecation policy.

* Add news fragment

* It’s a pkg

changelog.d/1268.breaking.md

@@ -0,0 +1,3 @@
+All packaging metadata except from `__version__` and `__version_info__` has been removed from the `attr` and `attrs` modules (for example, `attrs.__url__`).
+
+Please use [`importlib.metadata`](https://docs.python.org/3/library/importlib.metadata.html) or [*importlib_metadata*](https://pypi.org/project/importlib-metadata/) instead.

src/attr/__init__.py

@@ -79,54 +79,21 @@ def _make_getattr(mod_name: str) -> Callable:
     """
 
     def __getattr__(name: str) -> str:
-        dunder_to_metadata = {
+        if name not in ("__version__", "__version_info__"):
-            "__title__": "Name",
-            "__copyright__": "",
-            "__version__": "version",
-            "__version_info__": "version",
-            "__description__": "summary",
-            "__uri__": "",
-            "__url__": "",
-            "__author__": "",
-            "__email__": "",
-            "__license__": "license",
-        }
-        if name not in dunder_to_metadata:
             msg = f"module {mod_name} has no attribute {name}"
             raise AttributeError(msg)
 
-        import sys
+        try:
-        import warnings
-
-        if sys.version_info < (3, 8):
-            from importlib_metadata import metadata
-        else:
             from importlib.metadata import metadata
-
+        except ImportError:
-        if name not in ("__version__", "__version_info__"):
+            from importlib_metadata import metadata
-            warnings.warn(
-                f"Accessing {mod_name}.{name} is deprecated and will be "
-                "removed in a future release. Use importlib.metadata directly "
-                "to query for attrs's packaging metadata.",
-                DeprecationWarning,
-                stacklevel=2,
-            )
 
         meta = metadata("attrs")
-        if name == "__license__":
+
-            return "MIT"
-        if name == "__copyright__":
-            return "Copyright (c) 2015 Hynek Schlawack"
-        if name in ("__uri__", "__url__"):
-            return meta["Project-URL"].split(" ", 1)[-1]
         if name == "__version_info__":
             return VersionInfo._from_version_string(meta["version"])
-        if name == "__author__":
-            return meta["Author-email"].rsplit(" ", 1)[0]
-        if name == "__email__":
-            return meta["Author-email"].rsplit("<", 1)[1][:-1]
 
-        return meta[dunder_to_metadata[name]]
+        return meta["version"]
 
     return __getattr__
 

tests/test_packaging.py

@@ -20,30 +20,6 @@ def _mod(request):
 
 
 class TestLegacyMetadataHack:
-    def test_title(self, mod):
-        """
-        __title__ returns attrs.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "attrs" == mod.__title__
-
-        assert (
-            f"Accessing {mod.__name__}.__title__ is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
-    def test_copyright(self, mod):
-        """
-        __copyright__ returns the correct blurp.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "Copyright (c) 2015 Hynek Schlawack" == mod.__copyright__
-
-        assert (
-            f"Accessing {mod.__name__}.__copyright__ is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
     def test_version(self, mod, recwarn):
         """
         __version__ returns the correct version and doesn't warn.
@@ -52,67 +28,6 @@ class TestLegacyMetadataHack:
 
         assert [] == recwarn.list
 
-    def test_description(self, mod):
-        """
-        __description__ returns the correct description.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "Classes Without Boilerplate" == mod.__description__
-
-        assert (
-            f"Accessing {mod.__name__}.__description__ is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
-    @pytest.mark.parametrize("name", ["__uri__", "__url__"])
-    def test_uri(self, mod, name):
-        """
-        __uri__ & __url__ returns the correct project URL.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "https://www.attrs.org/" == getattr(mod, name)
-
-        assert (
-            f"Accessing {mod.__name__}.{name} is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
-    def test_author(self, mod):
-        """
-        __author__ returns Hynek.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "Hynek Schlawack" == mod.__author__
-
-        assert (
-            f"Accessing {mod.__name__}.__author__ is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
-    def test_email(self, mod):
-        """
-        __email__ returns Hynek's email address.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "hs@ox.cx" == mod.__email__
-
-        assert (
-            f"Accessing {mod.__name__}.__email__ is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
-    def test_license(self, mod):
-        """
-        __license__ returns MIT.
-        """
-        with pytest.deprecated_call() as ws:
-            assert "MIT" == mod.__license__
-
-        assert (
-            f"Accessing {mod.__name__}.__license__ is deprecated"
-            in ws.list[0].message.args[0]
-        )
-
     def test_does_not_exist(self, mod):
         """
         Asking for unsupported dunders raises an AttributeError.