build: use Travis build stage to release to PyPI (#562)

See #473 (comment)

Author: sloria

.travis.yml

@@ -2,7 +2,7 @@ sudo: false
 language: python
 dist: trusty
 
-matrix:
+jobs:
   fast_finish: true
   include:
     - python: 3.6
@@ -34,6 +34,20 @@ matrix:
     - python: 3.6
       env: TOXENV=checkqa
 
+    - stage: PyPI Release
+      if: tag IS present
+      script: skip
+      install: skip
+      after_success: skip
+      deploy:
+        provider: pypi
+        user: blueyed
+        password:
+          secure: "FY7qbX/N0XRcH8hVk00SsQWvNIkuxKvY7Br4ghRnHvleHG3YulJ7WbJnik+9eoBGeMfJeNyzBfVjpeo1ZIq9IZBiyTdNfG/sZFsC5LOoG/CPxPH3nD9JktI2HoBMnlSbGg/MMHjY+wXuOY647U/3qNedcnQmGztYt6QWi5DRxu8="
+        on:
+          tags: true
+        distributions: "sdist bdist_wheel"
+
   allow_failures:
     - env: TOXENV=py36-djmaster-postgres
 

tox.ini

@@ -65,23 +65,3 @@ deps =
     readme_renderer
 commands =
     python setup.py check -r -s
-
-# Release tooling
-[testenv:build]
-basepython = python3.6
-skip_install = true
-deps =
-    wheel
-    setuptools
-commands =
-    python setup.py -q sdist bdist_wheel
-
-[testenv:release]
-basepython = python3.5
-skip_install = true
-deps =
-    {[testenv:build]deps}
-    twine >= 1.9.1
-commands =
-    {[testenv:build]commands}
-    twine upload -s --skip-existing dist/*