serverless/lib/plugins/aws/lib/validate.js

'use strict';

const ServerlessError = require('../../../serverless-error');

module.exports = {
  validate() {
    if (!this.serverless.serviceDir) {
      throw new ServerlessError(
        'This command can only be run inside a service directory',
        'MISSING_SERVICE_DIRECTORY'
      );
    }

    this.options.stage = this.provider.getStage();
    this.options.region = this.provider.getRegion();
  },
};