Function main

packages/angular_devkit/schematics_cli/bin/schematics.ts:220–409

({
  args,
  stdout = process.stdout,
  stderr = process.stderr,
}: MainOptions)

}

export async function main({
  args,
  stdout = process.stdout,
  stderr = process.stderr,
}: MainOptions): Promise<0 | 1> {
  const { cliOptions, schematicOptions, _ } = parseOptions(args);

  /** Create the DevKit Logger used through the CLI. */
  const logger = createConsoleLogger(!!cliOptions.verbose, stdout, stderr, {
    info: (s) => s,
    debug: (s) => s,
    warn: (s) => styleText(['bold', 'yellow'], s),
    error: (s) => styleText(['bold', 'red'], s),
    fatal: (s) => styleText(['bold', 'red'], s),
  });

  if (cliOptions.help) {
    logger.info(getUsage());

    return 0;
  }

  /** Get the collection an schematic name from the first argument. */
  const { collection: collectionName, schematic: schematicName } = parseSchematicName(
    _.shift() || null,
  );

  const isLocalCollection = collectionName.startsWith('.') || collectionName.startsWith('/');

  /** Gather the arguments for later use. */
  const debug = cliOptions.debug ?? isLocalCollection;
  const dryRunPresent = cliOptions['dry-run'] != null;
  const dryRun = cliOptions['dry-run'] ?? debug;
  const force = !!cliOptions.force;
  const allowPrivate = !!cliOptions['allow-private'];

  /** Create the workflow scoped to the working directory that will be executed with this run. */
  const workflow = new NodeWorkflow(process.cwd(), {
    force,
    dryRun,
    resolvePaths: [process.cwd(), __dirname],
    schemaValidation: true,
    packageManager: getPackageManagerName(),
  });

  /** If the user wants to list schematics, we simply show all the schematic names. */
  if (cliOptions['list-schematics']) {
    return _listSchematics(workflow, collectionName, logger);
  }

  if (!schematicName) {
    logger.info(getUsage());

    return 1;
  }

  if (debug) {
    logger.info(