separate subcommands for setuptools class

Original author: Anderson Bravalheri

1 files changed, 20 insertions, 1 deletions

diff --git a/setuptools/command/build.py b/setuptools/command/build.py
index 6f0e560c..932de472 100644
--- a/setuptools/command/build.py
+++ b/setuptools/command/build.py
@@ -1,5 +1,24 @@
 from distutils.command.build import build as _build
+import warnings
+
+from setuptools import SetuptoolsDeprecationWarning
+
+
+_ORIGINAL_SUBCOMMANDS = {"build_py", "build_clib", "build_ext", "build_scripts"}
 
 
 class build(_build):
-    pass
+    # copy to avoid sharing the object with parent class
+    sub_commands = _build.sub_commands[:]
+
+    def run(self):
+        subcommands = {cmd[0] for cmd in _build.sub_commands}
+        if subcommands - _ORIGINAL_SUBCOMMANDS:
+            msg = """
+            It seems that you are using `distutils.command.build.build` to add
+            new subcommands. Using `distutils` directly is considered deprecated,
+            please use `setuptools.command.build`.
+            """
+            warnings.warns(msg, SetuptoolsDeprecationWarning)
+            self.sub_commands = _build.sub_commands
+        super().run()