gist for https://attonblog.blogspot.com/2019/08/nodenv.html

nodenv-bash.sh

# $ nodenv init - bash
eval export PATH="/Users/atton/.nodenv/shims:${PATH}"
export NODENV_SHELL=bash
source '/usr/local/Cellar/nodenv/1.3.0/libexec/../completions/nodenv.bash'
command nodenv rehash 2>/dev/null
nodenv() {
  local command
  command="${1:-}"
  if [ "$#" -gt 0 ]; then
    shift
  fi

  case "$command" in
  rehash|shell)
    eval "$(nodenv "sh-$command" "$@")";;
  *)
    command nodenv "$command" "$@";;
  esac
}

nodenv-no-rehash-zsh.sh

# $ nodenv init - --no-rehash zsh
eval export PATH="/Users/atton/.nodenv/shims:${PATH}"
export NODENV_SHELL=zsh
source '/usr/local/Cellar/nodenv/1.3.0/libexec/../completions/nodenv.zsh'
nodenv() {
  local command
  command="${1:-}"
  if [ "$#" -gt 0 ]; then
    shift
  fi

  case "$command" in
  rehash|shell)
    eval "$(nodenv "sh-$command" "$@")";;
  *)
    command nodenv "$command" "$@";;
  esac
}

nodenv.sh

# nodenv init -
eval export PATH="/Users/atton/.nodenv/shims:${PATH}"
export NODENV_SHELL=zsh
source '/usr/local/Cellar/nodenv/1.3.0/libexec/../completions/nodenv.zsh'
command nodenv rehash 2>/dev/null
nodenv() {
  local command
  command="${1:-}"
  if [ "$#" -gt 0 ]; then
    shift
  fi

  case "$command" in
  rehash|shell)
    eval "$(nodenv "sh-$command" "$@")";;
  *)
    command nodenv "$command" "$@";;
  esac
}