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diff --git a/resources/libraries/bash/entry/with_oper_for_vpp.sh b/resources/libraries/bash/entry/with_oper_for_vpp.sh
new file mode 100644
index 0000000000..23c0d8a9d1
--- /dev/null
+++ b/resources/libraries/bash/entry/with_oper_for_vpp.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2018 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -exuo pipefail
+
+# Typical usage:
+# $ source "./with_oper_for_vpp.sh" "per_patch_perf.sh"
+#
+# This wrapper is mostly useful for Jenkins invocation,
+# because in manual testing people usually already have checked out
+# the branches they want to test (which might not yet be available in Gerrit).
+#
+# Assumptions:
+# + There is a directory holding initial CSIT code to use, this script is there.
+# + First argument is filename of next entry script to execute.
+#   TODO: Support relative paths? Relative to BASH_ENTRY_DIR?
+# Consequences:
+# + A csit branch name is computed.
+# + Possibly overriden, based on CSIT_REF value.
+# + The computed or overriden CSIT refspec is checked out.
+# + The argument entry script is sourced, with arguments shifted.
+
+# "set -eu" handles failures from the following two lines.
+BASH_ENTRY_DIR="$(dirname $(readlink -e "${BASH_SOURCE[0]}"))"
+BASH_FUNCTION_DIR="$(readlink -e "${BASH_ENTRY_DIR}/../function")"
+source "${BASH_FUNCTION_DIR}/common.sh" || {
+    echo "Source failed." >&2
+    exit 1
+}
+common_dirs || die
+source "${BASH_FUNCTION_DIR}/branch.sh" || die "Source failed."
+checkout_csit_for_vpp "${GERRIT_BRANCH}" || die
+cmd="${1}"
+shift
+source "${BASH_ENTRY_DIR}/${cmd}" "$@"