[stubgenc] Add convenience script to run stubgenc test locally

Author: sizmailov

misc/test-stugenc.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# This script is expected to be run from root of the mypy repo.
+# A convenience script to be run locally, matches .github/workflows/test_stubgenc.yml
+
+# Install dependencies, demo project and mypy
+python -m pip install -r test-requirements.txt
+python -m pip install pybind11 numpy
+python -m pip install git+https://github.com/sizmailov/python_example.git@pybind11-mypy-demo
+python -m pip install .
+
+# Remove expected stubs and generate new inplace
+rm -rf test-data/stubgen/python_example
+stubgen -p python_example -o test-data/stubgen/
+
+# Compare generated stubs to expected ones
+git diff --exit-code test-data/stubgen/python_example