How to use hygen - 3 common examples

async runGenerator(context: ScaffoldContext, moduleRoot: Path) {
    const { tool } = this;
    const args = [context.generator, context.action];

    try {
      return await engine(context.argv, {
        // @ts-ignore Broken upstream
        createPrompter: /* istanbul ignore next */ () => ({ prompt: this.handlePrompt }),
        cwd: tool.options.root,
        debug: tool.config.debug,
        exec: this.handleExec,
        logger: new Logger(this.handleLog),
        templates: moduleRoot.append('templates').path(),
      });
    } catch (error) {
      // Intercept hygen error to provide a better error message
      if (error.message.startsWith("I can't find action")) {
        throw new Error(this.tool.msg('errors:scaffoldNoTemplates', { path: args.join('/') }));
      }

      throw error;
    }

return Kefir.stream(emitter => {
        runner(argv, {
          // NOTE: This is relative to dist, where the build result is.
          templates: path.join(__dirname, '..', 'templates'),
          cwd: state.cwd,
          logger: new Logger(emitter),
          createPrompter: () => inquirer,
          exec: (action, body) => {
            const opts = body && body.length > 0 ? { input: body } : {};
            return execa(action, { ...opts, shell: true });
          },
          debug: false
        })
          .then(result => {
            emitter.value({ type: 'CREATED', payload: { result } });
          })
          .catch(error => {
            emitter.value({ type: 'FAILED', error: true, payload: { error } });

async runGenerator(context: ScaffoldContext, moduleRoot: Path) {
    const { tool } = this;
    const args = [context.generator, context.action];

    try {
      return await engine(context.argv, {
        // @ts-ignore Broken upstream
        createPrompter: /* istanbul ignore next */ () => ({ prompt: this.handlePrompt }),
        cwd: tool.options.root,
        debug: tool.config.debug,
        exec: this.handleExec,
        logger: new Logger(this.handleLog),
        templates: moduleRoot.append('templates').path(),
      });
    } catch (error) {
      // Intercept hygen error to provide a better error message
      if (error.message.startsWith("I can't find action")) {
        throw new Error(this.tool.msg('errors:scaffoldNoTemplates', { path: args.join('/') }));
      }

      throw error;
    }
  }