Clarify how to release (#57)

Author: infothrill

Makefile

@@ -5,8 +5,8 @@
 .PHONY: publish
 publish:
 	@echo "make clean"
-	@echo "python setup.py sdist bdist_wheel"
-	@echo "twine"
+	@echo "tox -e build"
+	@echo "tox -e release"
 
 .PHONY: clean
 clean:

tox.ini

@@ -17,6 +17,26 @@ deps = -rrequirements/doc.txt
 commands=
     sphinx-build -W -b html -d {envtmpdir}/doctrees .  {envtmpdir}/html
 
+# Release tooling
+[testenv:build]
+basepython = python3
+skip_install = true
+deps =
+    wheel
+    setuptools
+commands =
+    python setup.py -q sdist bdist_wheel
+
+[testenv:release]
+basepython = python3
+skip_install = true
+deps =
+    {[testenv:build]deps}
+    twine >= 1.5.0
+commands =
+    {[testenv:build]commands}
+    twine upload --skip-existing dist/*
+
 [travis]
 python =
   3.6: py36, style, docs