zsh nvm autoload

autoload_nvm.sh

autoload -U add-zsh-hook
load-nvmrc() {
  local node_version="$(nvm version)"
  local nvmrc_path="$(nvm_find_nvmrc)"
  if [ -n "$nvmrc_path" ]; then
    local nvmrc_node_version=$(nvm version "$(cat "${nvmrc_path}")")
    if [ "$nvmrc_node_version" = "N/A" ]; then
      nvm install
    elif [ "$nvmrc_node_version" != "$node_version" ]; then
      nvm use
    fi
  else
    if ! command -v jq &> /dev/null
    then
        echo "This command requires jq"
        echo "See https://stedolan.github.io/jq/"
        echo "Reverting to nvm default version"
        nvm use default
        return 1
    fi
    if [[ ! -r package.json ]]
    then
        echo 'Can not read package.json in this directory'
        echo "Reverting to nvm default version"
        nvm use default
        return 1
    fi
    node_ver=$(jq -r '.engines.node' package.json)
    if [[ $node_ver -eq '' ]]
    then
        echo "package.json does not contain an .engines.node entry"
        echo "Reverting to nvm default version"
        nvm use default
        return 1
    fi
    nvm use $node_ver
  fi
}
add-zsh-hook chpwd load-nvmrc
load-nvmrc