[Unity] esbuild ESM转译的问题

[hypercross]

当前生成的类型定义依赖namespace，对于ts的代码补全来说不甚友好。在编辑器里打Debu之后，期望编辑器补全Debug并自动添加import，但是如果只有一个namespace CS的话就做不到。

可以通过declare module "unityengine" { export = CS.UnityEngine; }这样的方法来实现上述效果，但这样的话就会需要puerts能够识别unityengine这个module，或者通过打包把unityengine转译为CS.UnityEngine。

通过esbuild的esbuild-plugin-external-global插件，可以几乎做到这一点，但是有个问题就是esbuild的__toESM会转换一遍CS.UnityEngine再导出：

var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __commonJS = (cb, mod) => function __require() {
  return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));

// external-global-plugin:unityengine
var require_unityengine = __commonJS({
  "external-global-plugin:unityengine"(exports, module2) {
    module2.exports = CS.UnityEngine;
  }
});

// src/index.ts
var UnityEngine = __toESM(require_unityengine());
var import_unityengine = __toESM(require_unityengine());
console.log(
  CS.UnityEngine.Debug === UnityEngine.Debug,
  UnityEngine.Debug === import_unityengine.Debug
);

但是CS.UnityEngine要在访问CS.UnityEngine.Debug之后，才能在Object.getOwnPropertyNames里看到"Debug"，所以经过__toESM处理之后导入的Debug为undefined。