serverless/lib/plugins/aws/package/lib/stripNullPropsFromTemplateResources.js

Serverless Framework - Build web, mobile and IoT applications with serverless architectures using AWS Lambda, Azure Functions, Google CloudFunctions & more

'use strict';

const stripNullPropsFromObj = (obj) => {
  Object.entries(obj).forEach(([propName, propVal]) => {
    if (propVal === null) {
      delete obj[propName];
    } else if (typeof propVal === 'object') {
      stripNullPropsFromObj(propVal);
    }
  });
};

module.exports = {
  stripNullPropsFromTemplateResources() {
    const resources = this.serverless.service.provider.compiledCloudFormationTemplate.Resources;

    for (const resource of Object.values(resources)) {
      if (resource.Properties) {
        stripNullPropsFromObj(resource.Properties);
      }
    }
  },
};