Squashed 'libs/protobuf/' content from commit fcd3b9a85

git-subtree-dir: libs/protobuf
git-subtree-split: fcd3b9a85ef36e46643dc30176cea1a7ad62e02b

kokoro/docs/trampoline.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Copied from https://github.com/googleapis/google-cloud-python/blob/main/.kokoro/trampoline.sh
+
+set -eo pipefail
+
+python3 "${KOKORO_GFILE_DIR}/trampoline_v1.py"  || ret_code=$?
+
+chmod +x ${KOKORO_GFILE_DIR}/trampoline_cleanup.sh
+${KOKORO_GFILE_DIR}/trampoline_cleanup.sh || true
+
+exit ${ret_code}