Lazy load NVM

.zshrc

if [ -s "$HOME/.nvm/nvm.sh" ]; then
  export NVM_DIR="$HOME/.nvm"
  nvm() {
    unset -f nvm
    [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
    nvm $@
  }
  [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"
  DEFAULT_NODE_VER="$(cat "$NVM_DIR/alias/default" 2> /dev/null)"
  while [ -s "$NVM_DIR/alias/$DEFAULT_NODE_VER" ] && [ ! -z "$DEFAULT_NODE_VER" ]; do
    DEFAULT_NODE_VER="$(cat "$NVM_DIR/alias/$DEFAULT_NODE_VER" 2> /dev/null)"
  done
  DEFAULT_NODE_VER_PATH="$(find $NVM_DIR/versions/node -maxdepth 1 -name "v${DEFAULT_NODE_VER#v}*" | sort -rV | head -1)"
  if [ ! -z "$DEFAULT_NODE_VER_PATH" ]; then
    export PATH="$DEFAULT_NODE_VER_PATH/bin:$PATH"
  fi
fi