Function lessLoader

src/index.js:24–166

* Webpack loader that compiles Less to CSS. * @this {LoaderContext} * @param {string} content content * @returns {Promise } loader result

(content)

 * @returns {Promise<void>} loader result
 */
async function lessLoader(content) {
  const options = this.getOptions(/** @type {Schema} */ (schema));
  const callback = this.async();
  let implementation;

  try {
    implementation = await getLessImplementation(this, options.implementation);
  } catch (error) {
    callback(/** @type {Error} */ (error));

    return;
  }

  if (!implementation) {
    callback(
      new Error(
        `The Less implementation "${options.implementation}" not found`,
      ),
    );

    return;
  }

  const { lessOptions, pendingDependencyTasks } = getLessOptions(
    this,
    options,
    implementation,
  );
  const useSourceMap =
    typeof options.sourceMap === "boolean" ? options.sourceMap : this.sourceMap;

  if (useSourceMap) {
    lessOptions.sourceMap = {
      sourceMapBasepath: "",
      outputSourceFiles: true,
      // @ts-expect-error bad types
      disableSourcemapAnnotation: true,
    };
  }

  let data = content;

  if (typeof options.additionalData !== "undefined") {
    data =
      typeof options.additionalData === "function"
        ? `${await options.additionalData(data, this)}`
        : `${options.additionalData}\n${data}`;
  }

  const logger = this.getLogger("less-loader");
  const loaderContext = this;
  const lessLogAsWarnOrErr = options.lessLogAsWarnOrErr !== false;
  const loggerListener = {
    /** @param {string} message message */
    error(message) {
      if (lessLogAsWarnOrErr) {
        loaderContext.emitError(new Error(message));
      } else {