Function setupPreset

packages/jest-config/src/normalize.ts:170–259

(
  options: Config.InitialOptionsWithRootDir,
  optionsPreset: string,
)

};

const setupPreset = async (
  options: Config.InitialOptionsWithRootDir,
  optionsPreset: string,
): Promise<Config.InitialOptionsWithRootDir> => {
  let preset: Config.InitialOptions;
  const presetPath = replaceRootDirInPath(options.rootDir, optionsPreset);
  const presetModule = Resolver.findNodeModule(
    presetPath.startsWith('.') || path.isAbsolute(presetPath)
      ? presetPath
      : `${presetPath}/${PRESET_NAME}`,
    {
      basedir: options.rootDir,
      extensions: PRESET_EXTENSIONS,
    },
  );

  try {
    if (!presetModule) {
      throw new Error(`Cannot find module '${presetPath}'`);
    }

    // Force re-evaluation to support multiple projects
    try {
      delete require.cache[require.resolve(presetModule)];
    } catch {}

    preset = await requireOrImportModule(presetModule);
  } catch (error: any) {
    if (error instanceof SyntaxError || error instanceof TypeError) {
      throw createConfigError(
        `  Preset ${chalk.bold(presetPath)} is invalid:\n\n  ${
          error.message
        }\n  ${error.stack}`,
      );
    }

    if (error.message.includes('Cannot find module')) {
      if (error.message.includes(presetPath)) {
        const preset = Resolver.findNodeModule(presetPath, {
          basedir: options.rootDir,
        });

        if (preset) {
          throw createConfigError(
            `  Module ${chalk.bold(
              presetPath,
            )} should have "jest-preset.js" or "jest-preset.json" file at the root.`,
          );
        }
        throw createConfigError(
          `  Preset ${chalk.bold(
            presetPath,
          )} not found relative to rootDir ${chalk.bold(options.rootDir)}.`,
        );
      }
      throw createConfigError(
        `  Missing dependency in ${chalk.bold(presetPath)}:\n\n  ${
          error.message