#!/bin/bash -e

UNSHALLOW=''
if $(git rev-parse --is-shallow-repository); then
  UNSHALLOW='--unshallow'
fi

if [ ! -z "${CI_MERGE_REQUEST_TARGET_BRANCH_NAME+x}" ] && [ "${CI_MERGE_REQUEST_EVENT_TYPE}" != "detached" ]; then
  git fetch -q ${UNSHALLOW} --no-tags origin +"${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}":remotes/origin/"${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}"
  echo origin/"${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}"
  exit 0
fi

if [ ! -z "${CI_PIPELINE_ID+x}" ]; then
  git fetch -q ${UNSHALLOW} --no-tags origin +release:remotes/origin/release +main:remotes/origin/main
else
  git fetch -q
fi

base_release=$(git merge-base --octopus origin/release origin/main HEAD)
base_main=$(git merge-base origin/main HEAD)
if [ "${base_release}" = "${base_main}" ]; then
    dest=origin/release
else
    dest=origin/main
fi
echo ${dest}
exit 0