diff --git a/tools/workspace-status.sh b/tools/workspace-status.sh
new file mode 100755
index 0000000..9cc40e9
--- /dev/null
+++ b/tools/workspace-status.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# This script will be run by bazel when the build process starts to
+# generate key-value information that represents the status of the
+# workspace. The output should be like
+#
+# KEY1 VALUE1
+# KEY2 VALUE2
+#
+# If the script exits with non-zero code, it's considered as a failure
+# and the output will be discarded.
+
+function rev() {
+  cd $1; git describe --always --match "v[0-9].*" --dirty
+}
+
+echo STABLE_BUILD_GITILES_LABEL $(rev .)