add coverity scan build automation to cron job on Travis CI
diff --git a/build/docker/scripts/covscan.sh b/build/docker/scripts/covscan.sh
new file mode 100755
index 0000000..cb3f283
--- /dev/null
+++ b/build/docker/scripts/covscan.sh
@@ -0,0 +1,50 @@
+#
+# Coverity Scan Travis build script
+# To run this interactively, set the environment variables yourself,
+# and run this inside a docker container.
+#
+# Command-Line Arguments
+#
+# --skipdownload to skip re-downloading the Coverity Scan build package (large)
+#
+# Environment Variables (required)
+#
+# COVERITY_SCAN_NOTIFICATION_EMAIL - email address to notify
+# COVERITY_SCAN_TOKEN - the Coverity Scan token (should be secure)
+#
+# Environment Variables (defaulted)
+#
+# COVERITY_SCAN_BUILD_COMMAND - defaults to "build/docker/scripts/autotools.sh"
+# COVERITY_SCAN_DESCRIPTION - defaults to TRAVIS_BRANCH or "master" if empty
+# COVERITY_SCAN_PROJECT - defaults to "thrift"
+
+set -ex
+
+COVERITY_SCAN_BUILD_COMMAND=${COVERITY_SCAN_BUILD_COMMAND:-build/docker/scripts/autotools.sh}
+COVERITY_SCAN_DESCRIPTION=${COVERITY_SCAN_DESCRIPTION:-${TRAVIS_BRANCH:-master}}
+COVERITY_SCAN_PROJECT=${COVERITY_SCAN_PROJECT:-thrift}
+
+# download the coverity scan package
+
+pushd /tmp
+if [[ "$1" != "--skipdownload" ]]; then
+ rm -rf coverity_tool.tgz cov-analysis*
+ wget https://scan.coverity.com/download/linux64 --post-data "token=$COVERITY_SCAN_TOKEN&project=$COVERITY_SCAN_PROJECT" -O coverity_tool.tgz
+ tar xzf coverity_tool.tgz
+fi
+COVBIN=$(echo $(pwd)/cov-analysis*/bin)
+export PATH=$COVBIN:$PATH
+popd
+
+# build the project with coverity scan
+
+rm -rf cov-int/
+cov-build --dir cov-int $COVERITY_SCAN_BUILD_COMMAND
+tar cJf cov-int.tar.xz cov-int/
+curl --form token="$COVERITY_SCAN_TOKEN" \
+ --form email="$COVERITY_SCAN_NOTIFICATION_EMAIL" \
+ --form file=@cov-int.tar.xz \
+ --form version="$(git describe --tags)" \
+ --form description="$COVERITY_SCAN_DESCRIPTION" \
+ https://scan.coverity.com/builds?project="$COVERITY_SCAN_PROJECT"
+