Bash retry function

retry.sh

function retry {
  local retries=3
  local count=0
  until "$@"; do
    exit=$?
    wait=$((10 ** $count))
    count=$(($count + 1))
    if [ $count -lt $retries ]; then
      echo "Retry $count/$retries exited $exit, retrying in $wait seconds..."
      sleep $wait
    else
      echo "Retry $count/$retries exited $exit, no more retries left."
      return $exit
    fi
  done
  return 0
}