Upload merge commit to gerrit without pushing all the commits

git-push-merge-review

#!/bin/bash
# SPDX-FileCopyrightText: 2023 The LineageOS Project
#
# SPDX-License-Identifier: Apache-2.0

usage() {
    echo "Usage ${0} <remote> <merge_sha> <branch>"
}

# Verify argument count
if [ "${#}" -ne 3 ]; then
    usage
    exit 1
fi

REMOTE="${1}"
MERGE_SHA="${2}"
BRANCH="${3}"
FIRST_SHA="$(git show -s --pretty=%P ${MERGE_SHA} | cut -d ' ' -f 1)"
SECOND_SHA="$(git show -s --pretty=%P ${MERGE_SHA} | cut -d ' ' -f 2)"

git push "${REMOTE}" "${MERGE_SHA}":refs/for/"${BRANCH}"%base="${FIRST_SHA}",base="${SECOND_SHA}"