NB: npm bin wrapper for zsh

nb.plugin.zsh

#!/usr/bin/env zsh

nb() {
  local npmbin="`npm bin`"
  if [ ! -d "$npmbin" ]; then
    echo "NB is not available at $npmbin"
    return 1
  fi
  local command="$1"
  builtin shift 1
  "$npmbin/$command" $*
}

_nb() {
  _arguments -C \
    '1: :->cmds' \
    '*:: :->args' && ret=0

  case $state in
    cmds)
      local npmbin="`npm bin`"
      if [ ! -d "$npmbin" ]; then
        return 1
      fi
      _path_files -W "$npmbin"
      ret=0
      ;;
    args)
      _normal && ret=0
      ;;
  esac

  return ret
}

compdef _nb nb