Deprecate setup.py install and easy_install. Ref #917.

changelog.d/917.change.rst

@@ -0,0 +1 @@
+``setup.py install`` and ``easy_install`` commands are now officially deprecated. Use other standards-based installers (like pip) and builders (like build). Workloads reliant on this behavior should pin to this major version of Setuptools.

pytest.ini

@@ -29,3 +29,7 @@ filterwarnings=
 
 	# https://github.com/pypa/setuptools/issues/2823
 	ignore:setup_requires is deprecated.
+
+	# https://github.com/pypa/setuptools/issues/917
+	ignore:setup.py install is deprecated.
+	ignore:easy_install command is deprecated.

setuptools/command/easy_install.py

@@ -153,6 +153,12 @@ class easy_install(Command):
     create_index = PackageIndex
 
     def initialize_options(self):
+        warnings.warn(
+            "easy_install command is deprecated. "
+            "Use build and pip and other standards-based tools.",
+            EasyInstallDeprecationWarning,
+        )
+
         # the --user option seems to be an opt-in one,
         # so the default should be False.
         self.user = 0

setuptools/command/install.py

@@ -30,6 +30,13 @@ class install(orig.install):
     _nc = dict(new_commands)
 
     def initialize_options(self):
+
+        warnings.warn(
+            "setup.py install is deprecated. "
+            "Use build and pip and other standards-based tools.",
+            setuptools.SetuptoolsDeprecationWarning,
+        )
+
         orig.install.initialize_options(self)
         self.old_and_unmanageable = None
         self.single_version_externally_managed = None