switch_branches.sh

#!/bin/bash
BASE_PATH="./"

R0=(craft-assetmetadata v2 v3)
R1=(craft-elementstats v1 v2)
R2=(craft-footnotes v1 v2)
R3=(craft-maintenance v2 v3)

for i in {0..10}
do
  var="R$i[@]"
  REPO=("${!var}")

  REPO_PATH=${BASE_PATH}${REPO[0]}

  case $1 in
    c2|craft2) NEW_BRANCH=${REPO[1]} ;;
    c3|craft3) NEW_BRANCH=${REPO[2]} ;;
  esac

  if [ -n "${NEW_BRANCH}" ] && [ -d "${REPO_PATH}" ] && [ -d "${REPO_PATH}/.git" ]
  then
    echo "Switching branch to ${NEW_BRANCH} in ${REPO_PATH}"
    git -C ${REPO_PATH} checkout ${NEW_BRANCH}
  fi
done