Use rst2pyi to generate type stubs and package

.gitignore

@@ -12,6 +12,8 @@
 
 # Packages
 ############
+dist/
+*.egg-info
 
 # Logs and Databases
 ######################
@@ -25,6 +27,7 @@
 ######################
 build/
 bin/
+circuitpython-stubs/
 
 # Test failure outputs
 ######################

Makefile

@@ -17,6 +17,13 @@ CONFDIR      = .
 FORCE         = -E
 VERBOSE       = -v
 
+# path to generated type stubs
+STUBDIR       = circuitpython-stubs
+# Run "make VALIDATE= stubs" to avoid validating generated stub files
+VALIDATE      = -v
+# path to pypi source distributions
+DISTDIR       = dist
+
 # Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the
 # full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the
 # executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
@@ -31,7 +38,7 @@ I18NSPHINXOPTS  = $(BASEOPTS)
 
 TRANSLATE_SOURCES = extmod lib main.c ports/atmel-samd ports/nrf py shared-bindings shared-module supervisor
 
-.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext stubs
 
 help:
 	@echo "Please use \`make <target>' where <target> is one of"
@@ -60,6 +67,7 @@ help:
 
 clean:
 	rm -rf $(BUILDDIR)/*
+	rm -rf $(STUBDIR) $(DISTDIR)
 
 html:
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
@@ -203,3 +211,7 @@ translate: locale/circuitpython.pot
 
 check-translate: locale/circuitpython.pot $(wildcard locale/*.po)
 	$(PYTHON) tools/check_translations.py $^
+
+stubs:
+	rst2pyi $(VALIDATE) shared-bindings/ $(STUBDIR)
+	python setup.py sdist

requirements-dev.txt

@@ -0,0 +1 @@
+rst2pyi=0.1.0

setup.py

@@ -0,0 +1,22 @@
+from datetime import datetime
+from setuptools import setup
+from pathlib import Path
+
+stub_root = Path("circuitpython-stubs")
+stubs = [p.relative_to(stub_root).as_posix() for p in stub_root.glob("*.pyi")]
+
+now = datetime.utcnow()
+version = now.strftime("%Y.%m.%d")
+
+setup(
+    name="circuitpython-stubs",
+    description="PEP 561 type stubs for CircuitPython",
+    url="https://github.com/adafruit/circuitpython",
+    author="John Reese",
+    author_email="john@noswap.com",
+    version=version,
+    license="MIT",
+    package_data={"circuitpython-stubs": stubs},
+    packages=["circuitpython-stubs"],
+    setup_requires=["setuptools>=38.6.0"],
+)