FiSH function/alias for nvm

nvm.fish

function nvm
  bash -c 'source ~/.nvm/nvm.sh; nvm "$@"' nvm $argv

  set -l node_dir "$HOME/.nvm"

  switch (echo $argv[1])
    case install
    case use
      set -l node_version (ls $node_dir | grep $argv[2])
      set -l node_version (echo $node_version | cut -d " " -f1)

      set -U fish_user_paths "$node_dir/$node_version/bin"
  end
end