worker-loader/dist/utils.js

worker loader module for webpack

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getDefaultFilename = getDefaultFilename;
exports.getDefaultChunkFilename = getDefaultChunkFilename;
exports.getExternalsType = getExternalsType;
exports.workerGenerator = workerGenerator;
exports.sourceURLWebpackRegex = exports.sourceMappingURLRegex = void 0;

var _loaderUtils = require("loader-utils");

function getDefaultFilename(filename) {
  if (typeof filename === "function") {
    return filename;
  }

  return filename.replace(/\.([a-z]+)(\?.+)?$/i, ".worker.$1$2");
}

function getDefaultChunkFilename(chunkFilename) {
  return chunkFilename.replace(/\.([a-z]+)(\?.+)?$/i, ".worker.$1$2");
}

function getExternalsType(compilerOptions) {
  // For webpack@4
  if (compilerOptions.output.libraryTarget) {
    return compilerOptions.output.libraryTarget;
  } // For webpack@5


  if (compilerOptions.externalsType) {
    return compilerOptions.externalsType;
  }

  if (compilerOptions.output.library) {
    return compilerOptions.output.library.type;
  }

  if (compilerOptions.output.module) {
    return "module";
  }

  return "var";
}

function workerGenerator(loaderContext, workerFilename, workerSource, options) {
  let workerConstructor;
  let workerOptions;

  if (typeof options.worker === "undefined") {
    workerConstructor = "Worker";
  } else if (typeof options.worker === "string") {
    workerConstructor = options.worker;
  } else {
    ({
      type: workerConstructor,
      options: workerOptions
    } = options.worker);
  }

  const esModule = typeof options.esModule !== "undefined" ? options.esModule : true;
  const fnName = `${workerConstructor}_fn`;

  if (options.inline) {
    const InlineWorkerPath = (0, _loaderUtils.stringifyRequest)(loaderContext, `!!${require.resolve("./runtime/inline.js")}`);
    let fallbackWorkerPath;

    if (options.inline === "fallback") {
      fallbackWorkerPath = `__webpack_public_path__ + ${JSON.stringify(workerFilename)}`;
    }

    return `
${esModule ? `import worker from ${InlineWorkerPath};` : `var worker = require(${InlineWorkerPath});`}

${esModule ? "export default" : "module.exports ="} function ${fnName}() {\n  return worker(${JSON.stringify(workerSource)}, ${JSON.stringify(workerConstructor)}, ${JSON.stringify(workerOptions)}, ${fallbackWorkerPath});\n}\n`;
  }

  return `${esModule ? "export default" : "module.exports ="} function ${fnName}() {\n  return new ${workerConstructor}(__webpack_public_path__ + ${JSON.stringify(workerFilename)}${workerOptions ? `, ${JSON.stringify(workerOptions)}` : ""});\n}\n`;
} // Matches only the last occurrence of sourceMappingURL


const innerRegex = /\s*[#@]\s*sourceMappingURL\s*=\s*(.*?(?=[\s'"]|\\n|\*\/|$)(?:\\n)?)\s*/;
/* eslint-disable prefer-template */

const sourceMappingURLRegex = RegExp("(?:" + "/\\*" + "(?:\\s*\r?\n(?://)?)?" + "(?:" + innerRegex.source + ")" + "\\s*" + "\\*/" + "|" + "//(?:" + innerRegex.source + ")" + ")" + "\\s*");
exports.sourceMappingURLRegex = sourceMappingURLRegex;
const sourceURLWebpackRegex = RegExp("\\/\\/#\\ssourceURL=webpack-internal:\\/\\/\\/(.*?)\\\\n");
/* eslint-enable prefer-template */

exports.sourceURLWebpackRegex = sourceURLWebpackRegex;