This PR impliments the feature request python-poetry#784.

When a folder is explicit defined in `pyproject.toml` as excluded, all nested data, including subfolder, are excluded. It is no longer neccessary to use the glob `folder/**/*`

poetry/masonry/builders/builder.py

@@ -86,6 +86,8 @@ def find_excluded_files(self):  # type: () -> Set[str]
 
         explicitely_excluded = set()
         for excluded_glob in self._package.exclude:
+            if Path(self._path.as_posix(), str(excluded_glob)).is_dir():
+                excluded_glob = Path(str(excluded_glob), "**/*").as_posix()
             for excluded in glob(
                 os.path.join(self._path.as_posix(), str(excluded_glob)), recursive=True
             ):

tests/masonry/builders/test_sdist.py

@@ -410,6 +410,32 @@ def test_default_with_excluded_data(mocker):
         assert "my-package-1.2.3/PKG-INFO" in names
 
 
+def test_src_excluded_nested_data():
+    module_path = fixtures_dir / "default_with_excluded_data_toml"
+    poetry = Factory().create_poetry(module_path)
+    poetry._package.exclude = ["my_package/data"]
+
+    builder = SdistBuilder(poetry, NullEnv(), NullIO())
+    builder.build()
+
+    sdist = module_path / "dist" / "my-package-1.2.3.tar.gz"
+
+    assert sdist.exists()
+
+    with tarfile.open(str(sdist), "r") as tar:
+        names = tar.getnames()
+        assert len(names) == len(set(names))
+        assert "my-package-1.2.3/LICENSE" in names
+        assert "my-package-1.2.3/README.rst" in names
+        assert "my-package-1.2.3/my_package/__init__.py" in names
+        assert "my-package-1.2.3/pyproject.toml" in names
+        assert "my-package-1.2.3/setup.py" in names
+        assert "my-package-1.2.3/PKG-INFO" in names
+        assert "my-package-1.2.3/my_package/data/data1.txt" not in names
+        assert "my-package-1.2.3/my_package/data/sub_data/data2.txt" not in names
+        assert "my-package-1.2.3/my_package/data/sub_data/data3.txt" not in names
+
+
 def test_proper_python_requires_if_two_digits_precision_version_specified():
     poetry = Factory().create_poetry(project("simple_version"))
 

tests/masonry/builders/test_wheel.py

@@ -77,6 +77,23 @@ def test_wheel_excluded_data():
         assert "my_package/data/data1.txt" not in z.namelist()
 
 
+def test_wheel_excluded_nested_data():
+    module_path = fixtures_dir / "default_with_excluded_data_toml"
+    poetry = Factory().create_poetry(module_path)
+    poetry._package.exclude = ["my_package/data"]
+    WheelBuilder.make(poetry, NullEnv(), NullIO())
+
+    whl = module_path / "dist" / "my_package-1.2.3-py3-none-any.whl"
+
+    assert whl.exists()
+
+    with zipfile.ZipFile(str(whl)) as z:
+        assert "my_package/__init__.py" in z.namelist()
+        assert "my_package/data/sub_data/data2.txt" not in z.namelist()
+        assert "my_package/data/sub_data/data3.txt" not in z.namelist()
+        assert "my_package/data/data1.txt" not in z.namelist()
+
+
 def test_wheel_localversionlabel():
     module_path = fixtures_dir / "localversionlabel"
     WheelBuilder.make(Factory().create_poetry(module_path), NullEnv(), NullIO())