@darkobits/ts/lib/cleanup-plugin.js

Vite-based toolchain for Node projects.

import chalk from "chalk";
import log from "./log.js";
const prefix = chalk.dim.cyan("cleanup-plugin");
const EMPTY_CHUNK_PATTERN = /^\s*\/\/# sourceMappingURL=.*\s*$/;
const isEmptyChunkCode = (code) => {
  if (!code)
    return false;
  const trimmedCode = code.trim();
  return EMPTY_CHUNK_PATTERN.test(trimmedCode);
};
function removeEmptyChunks(bundle) {
  for (const [fileName, chunk] of Object.entries(bundle)) {
    if (chunk.type !== "chunk" || !fileName.endsWith(".js"))
      continue;
    if (isEmptyChunkCode(chunk.code)) {
      Reflect.deleteProperty(bundle, fileName);
      log.verbose(prefix, "Prevented empty chunk from being emitted:", chalk.green(fileName));
      const mapFileName = `${fileName}.map`;
      if (bundle[mapFileName]) {
        Reflect.deleteProperty(bundle, mapFileName);
        log.verbose(prefix, "Prevented empty chunk source map from being emitted:", chalk.green(mapFileName));
      }
    }
  }
}
function cleanupPlugin(options) {
  return {
    name: "ts:cleanup-plugin",
    enforce: "post",
    generateBundle: (outputOptions, bundle) => {
      if (options.removeEmptyChunks)
        removeEmptyChunks(bundle);
    }
  };
}
export {
  cleanupPlugin as default
};
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