Generate docs on travis

Author: edenhill

.travis.yml

@@ -29,7 +29,7 @@ matrix:
   # Source package verification with Python 3.6
   - os: osx
     python: "3.6"
-    env: DYLD_LIBRARY_PATH="$PWD/tmp-build/lib"
+    env: DYLD_LIBRARY_PATH="$PWD/tmp-build/lib" MK_DOCS="y" EXTRA_PKGS="sphinx sphinx_rtd_theme avro-python3"
     before_install:
         - pip install -U pip && pip install virtualenv
         - brew update && brew upgrade pyenv
@@ -59,6 +59,7 @@ install:
  - if [[ -z $CIBW_BEFORE_BUILD ]]; then pip install pytest-timeout flake8 ; fi
  - if [[ -z $CIBW_BEFORE_BUILD ]]; then rm -rf tmp-build ; tools/bootstrap-librdkafka.sh --require-ssl ${LIBRDKAFKA_VERSION} tmp-build ; fi
  - if [[ -n $TRAVIS_TAG && -n $CIBW_BEFORE_BUILD ]]; then pip install cibuildwheel --force-reinstall; fi
+ - if [[ ! -z $EXTRA_PKGS ]]; then pip install $(echo $EXTRA_PKGS) ; fi
 
 script:
  - if [[ -z $CIBW_BEFORE_BUILD ]]; then pip install -v --global-option=build_ext --global-option="-Itmp-build/include/" --global-option="-Ltmp-build/lib" . .[avro] ; fi
@@ -70,6 +71,7 @@ script:
  - if [[ -n $TRAVIS_TAG && -n $CIBW_BEFORE_BUILD ]]; then cibuildwheel --output-dir wheelhouse1 && tools/fixup-wheels.sh wheelhouse1 wheelhouse ; fi
  - if [[ -n $TRAVIS_TAG && $TRAVIS_OS_NAME == linux && -n $CIBW_BEFORE_BUILD ]]; then tools/test-manylinux.sh ; fi
  - if [[ -n $TRAVIS_TAG && $TRAVIS_OS_NAME == osx && -n $CIBW_BEFORE_BUILD ]]; then tools/test-osx.sh; fi
+ - if [[ $MK_DOCS == y ]]; then make docs ; fi
 
 deploy:
  provider: s3