#!/usr/bin/env bash

function nvm_fail() {
  echo "$1" >&2
  exit 127
}

has_realpath=""

function find_nvm_dir() {
  if which realpath >& /dev/null; then
    has_realpath=yes
    dirname "$(realpath "$0")"
  else
    command cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd
  fi
}

DIR="$(find_nvm_dir)"

function check_nvm_sh() {
  if [ ! -f "$DIR/nvm.sh" ]; then
    local rp_msg=""
    [ "$has_realpath" == "yes" ] || rp_msg="; missing realpath command for finding nvm-exec's realpath to search for nvm.sh"
    nvm_fail "Unable to find nvm.sh at $DIR$rp_msg"
  fi
}

check_nvm_sh

# shellcheck disable=SC1090
\. "$DIR/nvm.sh" --no-use

if [ -n "$NODE_VERSION" ]; then
  nvm use "$NODE_VERSION" > /dev/null || exit 127
elif ! nvm use >/dev/null 2>&1; then
  echo "No NODE_VERSION provided; no .nvmrc file found" >&2
  exit 127
fi

exec "$@"