Speeding up NVM for zsh

Just replace your default loader with this snippet in your .zshrc.

Idea is to postpone initialisation until you enter a directory that contains .nvmrc file.

# NVM
export NVM_DIR="$HOME/.nvm"

# Add any Node version for powerlevel10k to be less noisy
# export PATH="$HOME/.nvm/versions/node/v14.15.5/bin:$PATH"
#[ -s "$(brew --prefix nvm)/nvm.sh" ] && . "$(brew --prefix nvm)/nvm.sh"  # This loads nvm

# Based on official autoload for ZSH https://github.com/nvm-sh/nvm#zsh
autoload -U add-zsh-hook
load-nvmrc() {
  if [ -f ".nvmrc" ]; then
    if ! typeset -f nvm_find_nvmrc > /dev/null; then 
      [ -s "$(brew --prefix nvm)/nvm.sh" ] && . "$(brew --prefix nvm)/nvm.sh" --no-use 
    fi

    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" != "$node_version" ]; then
        nvm use
      fi
    elif [ "$node_version" != "$(nvm version default)" ]; then
      echo "Reverting to nvm default version"
      nvm use default
    fi
  fi
}
add-zsh-hook chpwd load-nvmrc
load-nvmrc