#!/usr/bin/env bash

usage() {
  echo "Usage $0 RUBY_VERSION [ARGS...]"
  exit $1
}

[ $# -lt 1 ] && usage 1
[ "${1:-}" = "--help" ] && usage 0

ruby="$1"
shift

if command -v chruby-exec >/dev/null 2>&1; then
  exec chruby-exec "$ruby" -- "$@"
elif command -v rvm-exec >/dev/null 2>&1; then
  exec rvm-exec "$ruby" "$@"
elif command -v rbenv >/dev/null 2>&1; then
  export RBENV_VERSION="$ruby"
  exec rbenv exec "$@"
else
  echo "No Ruby version manager found, tried chruby, rvm, rbenv" >&2
  exit 1
fi