beesbuild/es/builder/plugins/cjs.mjs

构建工具链

import { findStaticImports } from "mlly";
import MagicString from "magic-string";
function cjsPlugin(option, ctx) {
  if ((option != null ? option : false) === false) return [];
  return {
    name: "cli-cjs",
    renderChunk(code, _chunk, opts) {
      if (opts.format === "es") {
        return CJSToESM(code);
      }
      return null;
    }
  };
}
const CJSyntaxRe = /__filename|__dirname|require\(|require\.resolve\(/;
const CJSShim = `

// -- Unbuild CommonJS Shims --
import __cjs_url__ from 'url';
import __cjs_path__ from 'path';
import __cjs_mod__ from 'module';
const __filename = __cjs_url__.fileURLToPath(import.meta.url);
const __dirname = __cjs_path__.dirname(__filename);
const require = __cjs_mod__.createRequire(import.meta.url);
`;
function CJSToESM(code) {
  if (code.includes(CJSShim) || !CJSyntaxRe.test(code)) {
    return null;
  }
  const lastESMImport = findStaticImports(code).pop();
  const indexToAppend = lastESMImport ? lastESMImport.end : 0;
  const s = new MagicString(code);
  s.appendRight(indexToAppend, CJSShim);
  return {
    code: s.toString(),
    map: s.generateMap()
  };
}
export {
  cjsPlugin
};