Patched sdist in PEP 517 to include pyproject.toml

changelog.d/1632.breaking

@@ -0,0 +1 @@
+Include ``pyproject.toml`` in sdist built with PEP 517 build hooks.

setuptools/build_meta.py

@@ -36,6 +36,7 @@
 import setuptools
 import distutils
 from setuptools.py31compat import TemporaryDirectory
+from setuptools.command.sdist import sdist
 
 from pkg_resources import parse_requirements
 from pkg_resources.py31compat import makedirs
@@ -209,9 +210,13 @@ def build_wheel(self, wheel_directory, config_settings=None,
                                          wheel_directory, config_settings)
 
     def build_sdist(self, sdist_directory, config_settings=None):
-        return self._build_with_temp_dir(['sdist', '--formats', 'gztar'],
-                                         '.tar.gz', sdist_directory,
-                                         config_settings)
+        orig, sdist.include_pyproject_toml = sdist.include_pyproject_toml, True
+        try:
+            return self._build_with_temp_dir(['sdist', '--formats', 'gztar'],
+                                             '.tar.gz', sdist_directory,
+                                             config_settings)
+        finally:
+            sdist.include_pyproject_toml = orig
 
 
 class _BuildMetaLegacyBackend(_BuildMetaBackend):

setuptools/command/sdist.py

@@ -24,6 +24,8 @@ def walk_revctrl(dirname=''):
 class sdist(sdist_add_defaults, orig.sdist):
     """Smart sdist that finds anything supported by revision control"""
 
+    include_pyproject_toml = False
+
     user_options = [
         ('formats=', None,
          "formats for source distribution (comma-separated list)"),
@@ -45,6 +47,8 @@ def run(self):
         ei_cmd = self.get_finalized_command('egg_info')
         self.filelist = ei_cmd.filelist
         self.filelist.append(os.path.join(ei_cmd.egg_info, 'SOURCES.txt'))
+        if self.include_pyproject_toml:
+            self.filelist.append('pyproject.toml')
         self.check_readme()
 
         # Run sub commands

setuptools/tests/test_build_meta.py

@@ -262,6 +262,27 @@ def test_build_sdist_version_change(self, build_backend):
         assert os.path.isfile(
             os.path.join(os.path.abspath("out_sdist"), sdist_name))
 
+    def test_build_sdist_pyproject_toml_exists(self, tmpdir_cwd):
+        files = {
+            'setup.py': DALS("""
+                __import__('setuptools').setup(
+                    name='foo',
+                    version='0.0.0',
+                    py_modules=['hello']
+                )"""),
+            'hello.py': '',
+            'pyproject.toml': DALS("""
+                [build-system]
+                requires = ["setuptools", "wheel"]
+                build-backend = "setuptools.build_meta
+                """),
+        }
+        build_files(files)
+        build_backend = self.get_build_backend()
+        targz_path = build_backend.build_sdist("temp")
+        with tarfile.open(os.path.join("temp", targz_path)) as tar:
+            assert any('pyproject.toml' in name for name in tar.getnames())
+
     def test_build_sdist_setup_py_exists(self, tmpdir_cwd):
         # If build_sdist is called from a script other than setup.py,
         # ensure setup.py is included