add creds for build cache (#313)

* export BAZEL_BUILD_EXTRA_OPTIONS, GCP_SERVICE_ACCOUNT_KEY_PATH from do_ci.sh

* Update ci/do_ci.sh

Co-authored-by: Jacob Bohanon <[email protected]>

* update BAZEL_BUILD_EXTRA_OPTIONS line

---------

Co-authored-by: Jacob Bohanon <[email protected]>

Author: ben-taussig-solo

ci/do_ci.sh

@@ -42,6 +42,12 @@ export BAZEL_EXTRA_TEST_OPTIONS="--test_env=ENVOY_IP_TEST_VERSIONS=v4only --test
 export ENVOY_CONTRIB_BUILD_TARGET="//source/exe:envoy-static"
 export ENVOY_CONTRIB_BUILD_DEBUG_INFORMATION="//source/exe:envoy-static.dwp"
 
+BAZEL_BUILD_EXTRA_OPTIONS+=" --remote_cache=${BAZEL_REMOTE_CACHE}"
+
+export  GCP_SERVICE_ACCOUNT_KEY_PATH=$(mktemp -t gcp_service_account.XXXXXX.json)
+echo "${GCP_SERVICE_ACCOUNT_KEY}" | base64 --decode > "${GCP_SERVICE_ACCOUNT_KEY_PATH}"
+BAZEL_BUILD_EXTRA_OPTIONS+=" --google_credentials=${GCP_SERVICE_ACCOUNT_KEY_PATH}"
+
 if [ "${BUILD_TYPE:-}" != "" ] ; then
   BUILD_CONFIG="--config=$BUILD_TYPE"
 fi