Function handler

packages/angular/cli/src/command-builder/command-module.ts:97–147

(args: ArgumentsCamelCase<T> & OtherOptions)

  abstract run(options: Options<T> & OtherOptions): Promise<number | void> | number | void;

  async handler(args: ArgumentsCamelCase<T> & OtherOptions): Promise<void> {
    const { _, $0, ...options } = args;
    const { logger } = this.context;

    // Camelize options as yargs will return the object in kebab-case when camel casing is disabled.
    const camelCasedOptions: Record<string, unknown> = {};
    for (const [key, value] of Object.entries(options)) {
      camelCasedOptions[yargsParser.camelCase(key)] = value;
    }

    // Set up autocompletion if appropriate.
    const autocompletionExitCode = await considerSettingUpAutocompletion(this.commandName, logger);
    if (autocompletionExitCode !== undefined) {
      process.exitCode = autocompletionExitCode;

      return;
    }

    // Gather and report analytics.
    const analytics = await this.getAnalytics();
    const stopPeriodicFlushes = analytics && analytics.periodFlush();

    let exitCode: number | void | undefined;
    try {
      if (analytics) {
        this.reportCommandRunAnalytics(analytics);
        this.reportWorkspaceInfoAnalytics(analytics);
      }

      exitCode = await this.run(camelCasedOptions as Options<T> & OtherOptions);
    } catch (e) {
      if (e instanceof schema.SchemaValidationException) {
        logger.fatal(`Error: ${e.message}`);
        exitCode = 1;
      } else if (e instanceof PackageManagerError) {
        const output = e.stderr || e.stdout;
        logger.fatal(
          `Error: Package installation failed: ${e.message}${output ? `\nOutput: ${output}` : ''}`,
        );
        exitCode = 1;
      } else {
        throw e;
      }
    } finally {
      await stopPeriodicFlushes?.();

      if (typeof exitCode === 'number' && exitCode > 0) {
        process.exitCode = exitCode;
      }
    }
  }

  @memoize
  protected async getAnalytics(): Promise<AnalyticsCollector | undefined> {