Support namespace packages without __init__.pyi files in typeshed

data/test_typeshed/stubs/nspkg/METADATA.toml

@@ -0,0 +1,2 @@
+version = "0.1"
+requires = []

scripts/build_wheel.py

@@ -92,11 +92,13 @@ def __init__(self, typeshed_dir: str, distribution: str) -> None:
         self.distribution = distribution
         self._base_dir = os.path.join(typeshed_dir, THIRD_PARTY_NAMESPACE, distribution)
         # Python 3 (and mixed Python 2 and 3) stubs exist if at least one
-        # *.pyi file exists on the top-level or one level down, *excluding*
-        # the @python2 directory.
+        # *.pyi file exists on the top-level or in subdirectories, *excluding*
+        # the @python2 directory. May be more than one level down in the case
+        # of namespace packages (which lack __init__.pyi or any pyi files)
         self.py3_stubs = (
             len(glob(f"{self._base_dir}/*.pyi")) >= 1
             or len(glob(f"{self._base_dir}/[!@]*/*.pyi")) >= 1
+            or len(glob(f"{self._base_dir}/[!@]*/**/*.pyi")) >= 1
         )
         # Python 2 stubs exist if a @python2 directory exists.
         self.py2_stubs = PY2_NAMESPACE in os.listdir(self._base_dir)

tests/test_unit.py

@@ -8,6 +8,7 @@
     sort_by_dependency,
     transitive_deps,
     strip_types_prefix,
+    BuildData,
     SUFFIX,
     PY2_SUFFIX,
 )
@@ -97,7 +98,7 @@ def test_sort_by_dependency() -> None:
 
 
 def test_collect_setup_entries() -> None:
-    stubs = os.path.join("data", "test_typeshed_stubs")
+    stubs = os.path.join("data", "test_typeshed", "stubs")
     entries = collect_setup_entries(os.path.join(stubs, "singlefilepkg"), SUFFIX)
     assert entries == ({"singlefilepkg-stubs": ["__init__.pyi", "METADATA.toml"]})
 
@@ -121,9 +122,29 @@ def test_collect_setup_entries() -> None:
         }
     )
 
+    entries = collect_setup_entries(os.path.join(stubs, "nspkg"), SUFFIX)
+    assert entries == (
+        {
+            "nspkg-stubs": [
+                "innerpkg/__init__.pyi",
+                "METADATA.toml",
+            ]
+        }
+    )
+
+
+def test_build_data() -> None:
+    typeshed = os.path.join("data", "test_typeshed")
+    singlefilepkg_bd = BuildData(typeshed, "singlefilepkg")
+    assert singlefilepkg_bd.py3_stubs
+    assert not singlefilepkg_bd.py2_stubs
+    nspkg_bd = BuildData(typeshed, "nspkg")
+    assert nspkg_bd.py3_stubs
+    assert not nspkg_bd.py2_stubs
+
 
 def test_collect_setup_entries_bogusfile() -> None:
-    stubs = os.path.join("data", "test_typeshed_stubs")
+    stubs = os.path.join("data", "test_typeshed", "stubs")
     with pytest.raises(ValueError, match="Only stub files are allowed: bogusfile.txt"):
         collect_setup_entries(os.path.join(stubs, "bogusfiles"), SUFFIX)