Function applyPublishConfig

scripts/publish-packages.ts:222–274

(pkgDir: string)

 * `dist/` instead of the dev-time `src/index.ts`.
 */
const applyPublishConfig = async (pkgDir: string): Promise<() => Promise<void>> => {
  const pkgJsonPath = join(pkgDir, "package.json");
  const original = await readFile(pkgJsonPath, "utf8");
  const parsed = JSON.parse(original) as {
    publishConfig?: Record<string, unknown>;
    [key: string]: unknown;
  };

  const publishConfig = parsed.publishConfig;
  if (!publishConfig || typeof publishConfig !== "object") {
    return async () => {};
  }

  // Fields we allow publishConfig to override. `access`/`tag`/`registry` are
  // real npm publish-time config keys — they must NOT be hoisted into the
  // top-level manifest.
  const overridable = new Set([
    "exports",
    "main",
    "module",
    "types",
    "typings",
    "bin",
    "browser",
    "files",
  ]);

  const nextPublishConfig: Record<string, unknown> = {};
  let mutated = false;
  for (const [key, value] of Object.entries(publishConfig)) {
    if (overridable.has(key)) {
      parsed[key] = value;
      mutated = true;
    } else {
      nextPublishConfig[key] = value;
    }
  }

  if (!mutated) {
    return async () => {};
  }

  if (Object.keys(nextPublishConfig).length === 0) {
    delete parsed.publishConfig;
  } else {
    parsed.publishConfig = nextPublishConfig;
  }

  await writeFile(pkgJsonPath, `${JSON.stringify(parsed, null, 2)}\n`);
  return async () => {
    await writeFile(pkgJsonPath, original);
  };
};

const publishPackage = async (
  pkgDir: string,