Add Travis CI for Ubuntu 18.04, use docker run as Travis does not h…

…ave Ubuntu 18.04 support directly.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

.travis.yml

@@ -14,42 +14,54 @@ before_script:
 
 matrix:
   include:
-    - language: python
+    - name: "Ubuntu 14.04 Python 2.7"
+      language: python
       python:
         - 2.7
       before_install:
         - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
       script:
         - bazel test -s --verbose_failures -- //tensorflow_io/... -//tensorflow_io/ignite:ignite_py_test -//tensorflow_io/video:video_py_test
-    - language: python
+    - name: "Ubuntu 14.04 Python 3.4"
+      language: python
       python:
         - 3.4
       before_install:
         - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
       script:
         - bazel test -s --verbose_failures -- //tensorflow_io/... -//tensorflow_io/ignite:ignite_py_test -//tensorflow_io/video:video_py_test
-    - language: python
+    - name: "Ubuntu 14.04 Python 3.5"
+      language: python
       python:
         - 3.5
       before_install:
         - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
       script:
         - bazel test -s --verbose_failures -- //tensorflow_io/... -//tensorflow_io/ignite:ignite_py_test -//tensorflow_io/video:video_py_test
-    - language: python
+    - name: "Ubuntu 14.04 Python 3.6"
+      language: python
       python:
         - 3.6
       before_install:
         - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
       script:
         - bazel test -s --verbose_failures -- //tensorflow_io/... -//tensorflow_io/ignite:ignite_py_test -//tensorflow_io/video:video_py_test
-    - language: r
+    - name: "Ubuntu 18.04 Python 2.7"
+      script:
+        - docker run -i -t -e PYTHON_VERSION= -e BAZEL_VERSION=0.20.0 -e BAZEL_OS=linux --rm -v $PWD:/workspace -w /workspace --net=host ubuntu:18.04 bash -x -c ".travis/python.ubuntu.18.04.sh && apt-get -y -qq install libavformat57 libavcodec57 libavutil55 libswscale4 && bazel test -s --verbose_failures -- //tensorflow_io/... -//tensorflow_io/ignite:ignite_py_test"
+    - name: "Ubuntu 18.04 Python 3.6"
+      script:
+        - docker run -i -t -e PYTHON_VERSION=3 -e BAZEL_VERSION=0.20.0 -e BAZEL_OS=linux --rm -v $PWD:/workspace -w /workspace --net=host ubuntu:18.04 bash -x -c ".travis/python.ubuntu.18.04.sh && apt-get -y -qq install libavformat57 libavcodec57 libavutil55 libswscale4 && bazel test -s --verbose_failures -- //tensorflow_io/... -//tensorflow_io/ignite:ignite_py_test"
+    - name: "Ubuntu 14.04 R 3.2"
+      language: r
       r:
         - 3.2
       before_install:
         - cd R-package
       script:
         - R -e "devtools::test()"
-    - language: r
+    - name: "Ubuntu 14.04 R 3.5"
+      language: r
       r:
         - 3.5
       before_install:

.travis/python.ubuntu.18.04.sh

@@ -0,0 +1,20 @@
+set -x -e
+
+# Test on Travis inside Ubuntu18.04 docker image
+apt-get -y -qq update
+apt-get -y -qq install python${PYTHON_VERSION}-pip curl wget unzip make
+if [[ "" != "${PYTHON_VERSION}" ]]; then
+  ln -s /usr/bin/python${PYTHON_VERSION} /usr/bin/python
+  ln -s /usr/bin/pip${PYTHON_VERSION} /usr/bin/pip
+fi
+# Show gcc and python version in Travis CI
+gcc -v
+python --version
+# Install bazel
+URL="https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-installer-${BAZEL_OS}-x86_64.sh"
+wget -O install.sh "${URL}"
+chmod +x install.sh
+./install.sh
+rm -f install.sh
+# Configure TensorFlow
+./configure.sh

configure.sh

@@ -21,7 +21,7 @@ function write_action_env_to_bazelrc() {
   write_to_bazelrc "build --action_env $1=\"$2\""
 }
 
-rm .bazelrc
+rm -f .bazelrc
 if python -c "import tensorflow" &> /dev/null; then
     echo 'using installed tensorflow'
 else