Merge pull request #704 from rstudio/bugfix/test-tensorflow-1.12

Add TensorFlow 1.12 and 2.0 to Travis

Author: javierluraschi

.travis.yml

@@ -4,11 +4,34 @@ language: r
 dist: trusty
 sudo: false
 
-env:
-  - KERAS_BACKEND="tensorflow"
-  - KERAS_BACKEND="theano" THEANO_FLAGS=optimizer=fast_compile
-  - KERAS_IMPLEMENTATION="tensorflow"
-
+matrix:
+  include:
+    - name: "TensorFlow (Keras)"
+      env:
+        - KERAS_BACKEND="tensorflow"
+        - KERAS_IMPLEMENTATION="tensorflow"
+    - name: "Theano"
+      env:
+        - KERAS_BACKEND="theano"
+        - THEANO_FLAGS=optimizer=fast_compile
+    - name: "TensorFlow (TensorFlow)"
+      env:
+        - KERAS_BACKEND="tensorflow"
+        - KERAS_IMPLEMENTATION="tensorflow"
+    - name: "TensorFlow (TensorFlow 1.12)"
+      env:
+        - KERAS_IMPLEMENTATION="tensorflow"
+        - TENSORFLOW_WHEEL="https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.12.0-cp27-none-linux_x86_64.whl"
+    - name: "TensorFlow (TensorFlow 2.0-preview)"
+      env:
+        - KERAS_IMPLEMENTATION="tensorflow"
+        - TENSORFLOW_WHEEL="https://files.pythonhosted.org/packages/b8/48/983c8af6e63cfeebb6bb89866c38ea7d16491b8f72309f27df41b33a751e/tf_nightly_2.0_preview-1.13.0.dev20190117-cp27-cp27mu-manylinux1_x86_64.whl"
+  allow_failures:
+    - name: "TensorFlow (TensorFlow 2.0-preview)"
+      env:
+        - KERAS_IMPLEMENTATION="tensorflow"
+        - TENSORFLOW_WHEEL="https://files.pythonhosted.org/packages/b8/48/983c8af6e63cfeebb6bb89866c38ea7d16491b8f72309f27df41b33a751e/tf_nightly_2.0_preview-1.13.0.dev20190117-cp27-cp27mu-manylinux1_x86_64.whl"
+        
 cache:
   packages: true
   directories:
@@ -17,6 +40,11 @@ cache:
 
 before_script:
   - pip2.7 install --upgrade --ignore-installed --user travis virtualenv
-  - pip2.7 install --upgrade --ignore-installed --user travis keras h5py pyyaml requests Pillow scipy theano tensorflow
-
-
+  - pip2.7 install --upgrade --ignore-installed --user travis keras h5py pyyaml requests Pillow scipy theano
+  - |
+    if [[ ! -z "$TENSORFLOW_WHEEL" ]]; then
+      pip2.7 install --upgrade --ignore-installed --user travis $TENSORFLOW_WHEEL
+    else
+      pip2.7 install --upgrade --ignore-installed --user travis tensorflow
+      pip show tensorflow
+    fi