esbuild-shim-plugin/dist/index.js

A plugin for esbuild to shim imports for commonjs and esm modules.

// index.ts
var shimPlugin = () => ({
  name: "shimPlugin",
  setup(build) {
    const options = build.initialOptions;
    const format = (options?.define ?? {})["TSUP_FORMAT"]?.toLowerCase().replaceAll('"', "") ?? options.format;
    if (!format) {
      throw new Error(`options.format needs to be defined in order to use plugin`);
    }
    if (format !== "esm" && format !== "cjs") {
      throw new TypeError(`options.format must be either "esm" or "cjs". Got "${format}"`);
    }
    if (format === "esm") {
      options.banner = {
        js: `
const Module = await import('node:module'); 
const require = /* @__PURE__ */ (Module?.default?.createRequire ?? Module?.createRequire)(import.meta.url);
const __filename = /* @__PURE__ */ (await import("node:url")).fileURLToPath(import.meta.url);
const __dirname = /* @__PURE__ */ (await import("node:path")).dirname(__filename);`
      };
    }
    if (format === "cjs") {
      options.banner = {
        js: `
const importMetaUrl = /* @__PURE__ */ require("node:url").pathToFileURL(__filename).toString();
const importMetaFilename = /* @__PURE__ */ __filename;
const importMetaDirname = /* @__PURE__ */ __dirname;
const importMetaResolve = /* @__PURE__ */ require.resolve;`
      };
      options.define = {
        "import.meta.url": "importMetaUrl",
        "import.meta.filename": "importMetaFilename",
        "import.meta.dirname": "importMetaDirname",
        "import.meta.resolve": "importMetaResolve"
      };
    }
  }
});
var index_default = shimPlugin;
export {
  index_default as default,
  shimPlugin
};