Allow package-data for stubs packages

CHANGELOG.rst

@@ -6,6 +6,8 @@ Changelog
    Development Version
    ====================
 
+* Added support for specifying package-data for stub packages, #248.
+
 
 Version 0.24.1
 ==============

src/validate_pyproject/formats.py

@@ -313,6 +313,15 @@ def python_module_name_relaxed(value: str) -> bool:
     return python_module_name(value.replace("-", "_"))
 
 
+def package_data_module_name_or_wildcard(value: str) -> bool:
+    """Python module name, stubs package name or wildcard used for package-data."""
+    if value == "*":
+        return True
+    if python_module_name(value):
+        return True
+    return pep561_stub_name(value)
+
+
 def python_entrypoint_group(value: str) -> bool:
     """See ``Data model > group`` in the :ref:`PyPA's entry-points specification
     <pypa:entry-points>`.

src/validate_pyproject/plugins/setuptools.schema.json

@@ -115,9 +115,7 @@
       ],
       "type": "object",
       "additionalProperties": false,
-      "propertyNames": {
-        "anyOf": [{"type": "string", "format": "python-module-name"}, {"const": "*"}]
-      },
+      "propertyNames": {"type": "string", "format": "package-data-module-name-or-wildcard"},
       "patternProperties": {
         "^.*$": {"type": "array", "items": {"type": "string"}}
       }
@@ -139,9 +137,7 @@
       ],
       "type": "object",
       "additionalProperties": false,
-      "propertyNames": {
-        "anyOf": [{"type": "string", "format": "python-module-name"}, {"const": "*"}]
-      },
+      "propertyNames": {"type": "string", "format": "package-data-module-name-or-wildcard"},
       "patternProperties": {
           "^.*$": {"type": "array", "items": {"type": "string"}}
       }

tests/examples/setuptools/08-pyproject.toml

@@ -16,3 +16,7 @@ packages = ["mypkg-stubs"]
 
 [tool.setuptools.package-data]
 "*" = ["*.pyi"]
+"mypkg-stubs" = ["METADATA.toml"]
+
+[tool.setuptools.exclude-package-data]
+"mypkg-stubs" = ["*.rst"]