Allow third-party versions to end in asterisk (#6129)

This is a first step towards #6095, where x.y and x.y.* are treated as
equivalent. The next step is to update existing versions to use x.y.*
where applicable and then treat x.y differently.

Co-authored-by: Akuli <akuviljanen17@gmail.com>

CONTRIBUTING.md

@@ -95,15 +95,17 @@ The metadata file describes the stubs package using the
 [TOML file format](https://toml.io/en/). Currently, the following keys are
 supported:
 
-* `version`: The latest version of the library that the stubs support.
+* `version`: The versions of the library that the stubs support.
   For libraries that reflect API changes in the version number only
-  the parts indicating the API level should be specified. In the case
-  of [Semantic Versioning](https://semver.org/) that is the first two
-  components. When the stubs are updated to a newer version
+  the parts indicating the API level should be specified, with an
+  asterisk representing the API-independent part. In the case
+  of [Semantic Versioning](https://semver.org/), this version could look
+  like this: `2.7.*`. When the stubs are updated to a newer version
   of the library, the version of the stub should be bumped (note that
   previous versions are still available on PyPI). Some legacy stubs are
   marked with version `0.1`, indicating that their supported version is
-  unknown and needs to be updated.
+  unknown and needs to be updated. Other stubs don't use the asterisk
+  to denote the API-independent part.
 * `python2` (default: `false`): If set to `true`, the top-level stubs
   support both Python 2 and Python 3.
 * `requires` (optional): A list of other stub packages or packages with type

tests/check_consistent.py

@@ -169,7 +169,7 @@ def check_metadata():
         assert "version" in data, f"Missing version for {distribution}"
         version = data["version"]
         msg = f"Unsupported Python version {version}"
-        assert re.match(r"^\d+\.\d+(\.\d+)?$", version), msg
+        assert re.match(r"^\d+(\.\d+)*(\.\*)?$", version), msg
         for key in data:
             assert key in metadata_keys, f"Unexpected key {key} for {distribution}"
         assert isinstance(data.get("python2", False), bool), f"Invalid python2 value for {distribution}"

tests/stubtest_third_party.py

@@ -47,9 +47,12 @@ def run_stubtest(dist: Path) -> None:
         pip_exe = str(venv_dir / "bin" / "pip")
         python_exe = str(venv_dir / "bin" / "python")
 
-        dist_version = metadata.get("version")
-        if dist_version is None or dist_version == "0.1":
+        dist_version = metadata["version"]
+        assert isinstance(dist_version, str)
+        if dist_version == "0.1":
             dist_req = dist.name
+        elif dist_version.endswith(".*"):
+            dist_req = f"{dist.name}=={dist_version}"
         else:
             dist_req = f"{dist.name}=={dist_version}.*"