export async function runCLI()

in packages/jest-core/src/cli/index.ts [37:126]
61 lines of code
13 McCabe index (conditional complexity)

export async function runCLI(
  argv: Config.Argv,
  projects: Array<string>,
): Promise<{
  results: AggregatedResult;
  globalConfig: Config.GlobalConfig;
}> {
  let results: AggregatedResult | undefined;

  // If we output a JSON object, we can't write anything to stdout, since
  // it'll break the JSON structure and it won't be valid.
  const outputStream =
    argv.json || argv.useStderr ? process.stderr : process.stdout;

  const {globalConfig, configs, hasDeprecationWarnings} = await readConfigs(
    argv,
    projects,
  );

  if (argv.debug) {
    logDebugMessages(globalConfig, configs, outputStream);
  }

  if (argv.showConfig) {
    logDebugMessages(globalConfig, configs, process.stdout);
    exit(0);
  }

  if (argv.clearCache) {
    configs.forEach(config => {
      rimraf.sync(config.cacheDirectory);
      process.stdout.write(`Cleared ${config.cacheDirectory}\n`);
    });

    exit(0);
  }

  let configsOfProjectsToRun = configs;
  if (argv.selectProjects) {
    const namesMissingWarning = getProjectNamesMissingWarning(configs);
    if (namesMissingWarning) {
      outputStream.write(namesMissingWarning);
    }
    configsOfProjectsToRun = getConfigsOfProjectsToRun(
      argv.selectProjects,
      configs,
    );
    outputStream.write(getSelectProjectsMessage(configsOfProjectsToRun));
  }

  await _run10000(
    globalConfig,
    configsOfProjectsToRun,
    hasDeprecationWarnings,
    outputStream,
    r => {
      results = r;
    },
  );

  if (argv.watch || argv.watchAll) {
    // If in watch mode, return the promise that will never resolve.
    // If the watch mode is interrupted, watch should handle the process
    // shutdown.
    return new Promise(() => {});
  }

  if (!results) {
    throw new Error(
      'AggregatedResult must be present after test run is complete',
    );
  }

  const {openHandles} = results;

  if (openHandles && openHandles.length) {
    const formatted = formatHandleErrors(openHandles, configs[0]);

    const openHandlesString = pluralize('open handle', formatted.length, 's');

    const message =
      chalk.red(
        `\nJest has detected the following ${openHandlesString} potentially keeping Jest from exiting:\n\n`,
      ) + formatted.join('\n\n');

    console.error(message);
  }

  return {globalConfig, results};
}