npm -> pnpm redirector

npm-pnpm-redirector.sh

# npm -> pnpm redirector
# For those people who hate typing "pnpm" or even saying it
#
# INSTRUCTIONS
# APPEND the following lines in our ~/.bashrc or ~/.zshrc

### npm -> pnpm shim start (https://gist.github.com/sidx1024/22b07c6dda9ca707d7b91e148d2e86ef)
export REAL_NPM_BIN="$(command -v npm)"

_find_pm_root() {
  local dir="${PWD}"
  while [ "$dir" != "/" ]; do
    if [ -f "$dir/pnpm-lock.yaml" ] || [ -f "$dir/pnpm-workspace.yaml" ]; then
      printf '%s\n' "$dir"
      return 0
    fi
    dir="$(dirname "$dir")"
  done
  return 1
}

_is_flag() {
  case "$1" in
    -*) return 0 ;;
    *)  return 1 ;;
  esac
}

npm() {
  local real_npm="${REAL_NPM_BIN:-$(command -v npm)}"
  local pm_root
  if typeset -f _find_pm_root > /dev/null 2>&1; then                                                                                                    
    pm_root="$(_find_pm_root)" || pm_root=""                                                                                                            
  else                                                                                                                                                  
    pm_root=""                                                                                                                                          
  fi 

  if [ -z "$pm_root" ]; then
    command "$real_npm" "$@"
    return $?
  fi

  if [ $# -eq 0 ]; then
    echo "\033[33m↪ Redirecting to: pnpm\033[0m" >&2
    command pnpm
    return $?
  fi

  local cmd="$1"
  shift

  case "$cmd" in
    install|i|add|uninstall|remove|rm|update|up|exec|x|run|test|start|stop|restart)
      for arg in "$@"; do
        case "$arg" in
          -g|--global)
            command "$real_npm" "$cmd" "$@"
            return $?
            ;;
        esac
      done
      ;;
  esac

  case "$cmd" in
    install|i)
      local has_pkg=0
      for arg in "$@"; do
        if ! _is_flag "$arg"; then
          has_pkg=1
          break
        fi
      done

      if [ "$has_pkg" -eq 1 ]; then
        echo "\033[33m↪ Redirecting: npm $cmd $@ → pnpm add $@\033[0m" >&2
        command pnpm add "$@"
      else
        echo "\033[33m↪ Redirecting: npm $cmd $@ → pnpm install $@\033[0m" >&2
        command pnpm install "$@"
      fi
      return $?
      ;;

    ci)
      echo "\033[33m↪ Redirecting: npm ci → pnpm install --frozen-lockfile\033[0m" >&2
      command pnpm install --frozen-lockfile "$@"
      return $?
      ;;

    add)
      echo "\033[33m↪ Redirecting: npm add $@ → pnpm add $@\033[0m" >&2
      command pnpm add "$@"
      return $?
      ;;

    uninstall|remove|rm)
      echo "\033[33m↪ Redirecting: npm $cmd $@ → pnpm remove $@\033[0m" >&2
      command pnpm remove "$@"
      return $?
      ;;

    update|up)
      echo "\033[33m↪ Redirecting: npm $cmd $@ → pnpm update $@\033[0m" >&2
      command pnpm update "$@"
      return $?
      ;;

    exec|x)
      echo "\033[33m↪ Redirecting: npm $cmd $@ → pnpm dlx $@\033[0m" >&2
      command pnpm dlx "$@"
      return $?
      ;;

    run)
      echo "\033[33m↪ Redirecting: npm run $@ → pnpm run $@\033[0m" >&2
      command pnpm run "$@"
      return $?
      ;;

    test)
      echo "\033[33m↪ Redirecting: npm test $@ → pnpm test $@\033[0m" >&2
      command pnpm test "$@"
      return $?
      ;;

    start)
      echo "\033[33m↪ Redirecting: npm start $@ → pnpm start $@\033[0m" >&2
      command pnpm start "$@"
      return $?
      ;;

    stop)
      echo "\033[33m↪ Redirecting: npm stop $@ → pnpm stop $@\033[0m" >&2
      command pnpm stop "$@"
      return $?
      ;;

    restart)
      echo "\033[33m↪ Redirecting: npm restart $@ → pnpm restart $@\033[0m" >&2
      command pnpm restart "$@"
      return $?
      ;;

    init)
      command "$real_npm" init "$@"
      return $?
      ;;

    publish|login|logout|whoami|owner|access|dist-tag|team|org|token|profile)
      command "$real_npm" "$cmd" "$@"
      return $?
      ;;

    *)
      echo "\033[33m↪ Redirecting: npm $cmd $@ → pnpm $cmd $@\033[0m" >&2
      command pnpm "$cmd" "$@"
      command "$real_npm" "$cmd" "$@"
      return $?
      ;;
  esac
}
### npm -> pnpm shim end