docs: do ci on docs

.travis.yml

@@ -9,5 +9,6 @@ env:
   - TEST_TYPE=normal
   - TEST_TYPE=coverage
   - TEST_TYPE=asan
+  - TEST_TYPE=docs
 
 script: docker run -t -i -v $TRAVIS_BUILD_DIR:/source lyft/envoy-build:latest /bin/bash -c "cd /source && ci/do_ci.sh $TEST_TYPE"

ci/build_container/build_container.sh

@@ -4,12 +4,15 @@ set -e
 
 # Setup basic requirements and install them.
 apt-get update
-apt-get install -y wget software-properties-common make cmake git python clang-format-3.6 bc
+apt-get install -y wget software-properties-common make cmake git python python-pip clang-format-3.6 bc
 add-apt-repository -y ppa:ubuntu-toolchain-r/test
 apt-get update
 apt-get install -y g++-4.9
 rm -rf /var/lib/apt/lists/*
 
+# virtualenv
+pip install virtualenv
+
 # Build artifacts
 THIRDPARTY_BUILD=/thirdparty_build
 mkdir $THIRDPARTY_BUILD

ci/do_ci.sh

@@ -8,7 +8,11 @@ NUM_CPUS=`grep -c ^processor /proc/cpuinfo`
 
 echo "building using $NUM_CPUS CPUs"
 
-if [[ "$1" == "coverage" ]]; then
+if [[ "$1" == "docs" ]]; then
+  echo "docs build..."
+  make docs
+  exit 0
+elif [[ "$1" == "coverage" ]]; then
   echo "coverage build..."
   EXTRA_CMAKE_FLAGS="-DENVOY_CODE_COVERAGE:BOOL=ON"
   TEST_TARGET="envoy.check-coverage"