Implement bazel-based builds in Travis.

This refactored test build scripts to enable
bazel-build scripts in Travis.

1 files changed, 34 insertions, 0 deletions

diff --git a/ci/travis.sh b/ci/travis.sh
new file mode 100755
index 0000000..24a557e
--- /dev/null
+++ b/ci/travis.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env sh
+set -evx
+
+# if possible, ask for the precise number of processors,
+# otherwise take 2 processors as reasonable default; see
+# https://docs.travis-ci.com/user/speeding-up-the-build/#Makefile-optimization
+if [ -x /usr/bin/getconf ]; then
+    NPROCESSORS=$(/usr/bin/getconf _NPROCESSORS_ONLN)
+else
+    NPROCESSORS=2
+fi
+# as of 2017-09-04 Travis CI reports 32 processors, but GCC build
+# crashes if parallelized too much (maybe memory consumption problem),
+# so limit to 4 processors for the time being.
+if [ $NPROCESSORS -gt 4 ] ; then
+	echo "$0:Note: Limiting processors to use by make from $NPROCESSORS to 4."
+	NPROCESSORS=4
+fi
+# Tell make to use the processors. No preceding '-' required.
+MAKEFLAGS="j${NPROCESSORS}"
+export MAKEFLAGS
+
+env | sort
+
+mkdir build || true
+cd build
+cmake -Dgtest_build_samples=ON \
+      -Dgtest_build_tests=ON \
+      -Dgmock_build_tests=ON \
+      -DCMAKE_CXX_FLAGS=$CXX_FLAGS \
+      -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+      ..
+make
+CTEST_OUTPUT_ON_FAILURE=1 make test