Move routes stubs to @python2 directory (#5637)

* Move routes stubs to @python2 directory

* Ignore Python-2-only stubs for stubtest

* Use standard idiom for re-exporting items

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

pyrightconfig.json

@@ -15,7 +15,6 @@
         "stubs/openssl-python",
         "stubs/pathlib2",
         "stubs/pymssql",
-        "stubs/Routes",
         "stubs/scribe",
         "stubs/tornado"
     ],

pyrightconfig.stricter.json

@@ -16,7 +16,6 @@
         "stubs/openssl-python",
         "stubs/pathlib2",
         "stubs/pymssql",
-        "stubs/Routes",
         "stubs/scribe",
         "stubs/tornado",
         // Modules that are incomplete in some way.

requirements-tests-py3.txt

@@ -5,4 +5,4 @@ flake8==3.9.2
 flake8-bugbear==21.4.3
 flake8-pyi==20.10.0
 isort==5.8.0
-pytype==2021.5.25
+pytype==2021.06.17

stubs/Routes/@python2/routes/__init__.pyi

@@ -1,4 +1,5 @@
-from . import mapper, util
+from .mapper import Mapper as Mapper
+from .util import URLGenerator as URLGenerator, redirect_to as redirect_to, url_for as url_for
 
 class _RequestConfig:
     def __getattr__(self, name): ...
@@ -7,8 +8,3 @@ class _RequestConfig:
     def load_wsgi_environ(self, environ): ...
 
 def request_config(original=...): ...
-
-Mapper = mapper.Mapper
-redirect_to = util.redirect_to
-url_for = util.url_for
-URLGenerator = util.URLGenerator

stubs/Routes/METADATA.toml

@@ -1,3 +1 @@
 version = "0.1"
-python2 = true
-python3 = false

tests/stubtest_third_party.py

@@ -8,6 +8,7 @@ import sys
 import tempfile
 import toml
 import venv
+from glob import glob
 from pathlib import Path
 
 
@@ -37,7 +38,7 @@ def run_stubtest(dist: Path) -> None:
         metadata = dict(toml.loads(f.read()))
 
     # Ignore stubs that don't support Python 2
-    if not bool(metadata.get("python3", True)):
+    if not bool(metadata.get("python3", True)) or not has_py3_stubs(dist):
         return
 
     with tempfile.TemporaryDirectory() as tmp:
@@ -105,6 +106,10 @@ def run_stubtest(dist: Path) -> None:
             print(f"stubtest succeeded for {dist.name}", file=sys.stderr)
 
 
+def has_py3_stubs(dist: Path) -> bool:
+    return len(glob(f"{dist}/*.pyi")) > 0 or len(glob(f"{dist}/[!@]*/__init__.pyi")) > 0
+
+
 def main():
     parser = argparse.ArgumentParser()
     parser.add_argument("--num-shards", type=int, default=1)