How toAutoload the correct Node version with NVM

If you use NVM to change your Node.js version, and you work on different projects you may found yourself having to remember to switch versions.

If you have a .nvmrc file in the project with the Node version, you can add the following lines to your .zshrc:

autoload -U add-zsh-hook

load-nvmrc() {
  local nvmrc_path

  if [ -n "$nvmrc_path" ]; then
    local nvmrc_node_version
    nvmrc_node_version=$(nvm version "$(cat "${nvmrc_path}")")

    if [ "$nvmrc_node_version" = "N/A" ]; then
      nvm install
    elif [ "$nvmrc_node_version" != "$(nvm version)" ]; then
      nvm use
  elif [ -n "$(PWD=$OLDPWD nvm_find_nvmrc)" ] && [ "$(nvm version)" != "$(nvm version default)" ]; then
    echo "Reverting to nvm default version"
    nvm use default

add-zsh-hook chpwd load-nvmrc

That script will try to load the version specified in your .nvmrc whenever you navigate in your terminal to the folder with that file.