Update directions and makefile to account for testpypi fun

Makefile

@@ -75,3 +75,16 @@ test_rest:
 prepare_release:
 	rm -rf dist build
 	python setup.py bdist_wheel sdist
+
+# Make sure this is ran in a fresh venv of some form
+install_test_release:
+	pip uninstall accelerate -y
+	pip install -i https://testpypi.python.org/pypi --extra-index-url https://pypi.org/simple accelerate
+
+# Run as `make target=testpypi upload_release`
+upload_release:
+	@if [ "$(target)" != "testpypi" ] && [ "$(target)" != "pypi" ]; then \
+		echo "Error: target must be either 'testpypi' or 'pypi'"; \
+		exit 1; \
+	fi
+	twine upload dist/* -r $(target)

setup.py

@@ -105,15 +105,13 @@
 # 5. Run the following commands in the top-level directory:
 #      make prepare_release
 # 6. Upload the package to the pypi test server first:
-#      twine upload dist/* -r testpypi
+#      make target=testpypi upload_release
 # 7. Check that you can install it in a virtualenv by running:
-#      pip install accelerate
-#      pip uninstall accelerate
-#      pip install -i https://test.pypi.org/simple/ accelerate
+#      make install_test_release
 #      accelerate env
 #      accelerate test
 # 8. Upload the final version to actual pypi:
-#      twine upload dist/* -r pypi
+#      make target=pypi upload_release
 # 9. Add release notes to the tag in github once everything is looking hunky-dory.
 # 10. Go back to the main branch and update the version in __init__.py, setup.py to the new version ".dev" and push to
 #     main.