ZSH script to automatically switch Node.js version based on .nvmrc file

nvm-auto-switch.sh

#!/bin/zsh
# =============================================================================
# NVM Auto-Switch
# =============================================================================
# Automatically switches Node.js version when entering a directory with .nvmrc
#
# Features:
# - Detects .nvmrc file in current directory
# - Installs Node version if not available
# - Switches to the specified version automatically
# - Reverts to default version when leaving project directory
#
# Usage:
# Add this line to your .zshrc:
#   source ~/zsh-scripts/nvm-auto-switch.sh
#
# Requirements:
# - nvm (Node Version Manager) must be installed and loaded before this script
# - zsh shell
#
# References:
# - https://github.com/nvm-sh/nvm#nvmrc
# - https://github.com/beatrizsmerino/vitepress-setup
# =============================================================================

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" != "$node_version" ]; then
      nvm use
    fi
  elif [ "$node_version" != "$(nvm version default)" ]; then
    echo "Reverting to nvm default version"
    nvm use default
  fi
}

add-zsh-hook chpwd load-nvmrc
load-nvmrc