Updates travis script to replace pytest with Bazel

.bazelrc

@@ -0,0 +1,18 @@
+#Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+build --verbose_failures
+test --keep_going
+test --build_tests_only
+test --test_output=errors
+test --test_verbose_timeout_warnings

.flake8

@@ -0,0 +1,43 @@
+#Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+[flake8]
+inline-quotes = double
+max-line-length = 88
+max-complexity = 10
+exclude = .git,
+          .tox,
+          .pytest_cache,
+          __pycache__
+ignore = C901,
+         E101,
+         E111,
+         E114,
+         E121,
+         E125,
+         E126,
+         E129,
+         E221,
+         E265,
+         E271,
+         E305,
+         E306,
+         E501,
+         E502,
+         E731,
+         E741,
+         F401,
+         F812,
+         W191,
+         W503,
+         W504,

.travis.yml

@@ -12,19 +12,43 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 language: python
-python:
-  - "2.7"
-  - "3.5"
-  - "3.6"
-install:
-  - pip install -U pip
+
+before_install:
+  - wget -O install.sh "https://github.com/bazelbuild/bazel/releases/download/0.26.1/bazel-0.26.1-installer-linux-x86_64.sh"
+  - chmod +x install.sh
+  - ./install.sh --user
+  - rm -f install.sh
+  - sudo apt-get -y install libopenexr-dev
+  - sudo apt-get -y install libgles2-mesa-dev
+  - sudo apt-get -y install libc-ares-dev
+  - pip install -U absl-py
+  - pip install -U scipy
+  - pip install -U OpenEXR
+  - pip install -U flake8
   - pip install -U python-coveralls
-  - pip install -U tox-travis
-  - pip install -U tox-pip-version
+
+jobs:
+  include:
+    - os: linux
+      python: 2.7
+      install:
+        - pip install -U tensorflow
+    - os: linux
+      python: 3.6
+      install:
+        - pip install -U tensorflow
+    - os: linux
+      python: 3.6
+      install:
+        - pip install -U tf-nightly-2.0-preview
+
 script:
-  - tox
+  - bazel test //tensorflow_graphics/...
+  - flake8 --config=.flake8 ./tensorflow_graphics/
+
 after_success:
   - coveralls
+
 notifications:
   email:
     recipients: