Bespoke IaC configuration depending on stage being deployed

alarms.ts

import { config } from "@shared/config";
import { Stages } from "@models/Stages";
import hello from "@functions/hello";

export const configureAlarms = () => {
  // only add alarm if prod or staging
  if (config.stage === Stages.prod || config.stage === Stages.staging) {
    return {
      HelloFunctionErrorAlarm: {
        Type: "AWS::CloudWatch::Alarm",
        Properties: {
          AlarmName: "HelloFunctionErrorAlarm",
          AlarmDescription: "Alarm if lambda errors more than threshold",
          Namespace: "AWS/Lambda",
          MetricName: "Errors",
          Dimensions: [
            {
              Name: "FunctionName",
              Value: hello.name,
            },
          ],
          Statistic: "Sum",
          ComparisonOperator: "GreaterThanThreshold",
          Threshold: 0,
          EvaluationPeriods: 5,
          Period: 60,
          TreatMissingData: "breaching",
        },
      },
    };
  }

  return {};
};