async function promoteBlueGreen()

in src/actions/promote.ts [144:228]
40 lines of code
3 McCabe index (conditional complexity)

async function promoteBlueGreen(
   kubectl: Kubectl,
   manifests: string[],
   resourceType: ClusterType
) {
   // update container images and pull secrets
   const inputManifestFiles: string[] = updateManifestFiles(manifests)
   const manifestObjects: BlueGreenManifests =
      getManifestObjects(inputManifestFiles)

   const routeStrategy = parseRouteStrategy(
      core.getInput('route-method', {required: true})
   )

   core.startGroup('Deleting old deployment and making new stable deployment')

   const {deployResult} = await (async () => {
      switch (routeStrategy) {
         case RouteStrategy.INGRESS:
            return await promoteBlueGreenIngress(kubectl, manifestObjects)
         case RouteStrategy.SMI:
            return await promoteBlueGreenSMI(kubectl, manifestObjects)
         default:
            return await promoteBlueGreenService(kubectl, manifestObjects)
      }
   })()

   core.endGroup()

   // checking stability of newly created deployments
   core.startGroup('Checking manifest stability')
   const deployedManifestFiles = deployResult.manifestFiles
   const resources: Resource[] = getResources(
      deployedManifestFiles,
      models.DEPLOYMENT_TYPES.concat([
         models.DiscoveryAndLoadBalancerResource.SERVICE
      ])
   )
   await KubernetesManifestUtility.checkManifestStability(
      kubectl,
      resources,
      resourceType
   )
   core.endGroup()

   core.startGroup(
      'Routing to new deployments and deleting old workloads and services'
   )
   if (routeStrategy == RouteStrategy.INGRESS) {
      await routeBlueGreenIngressUnchanged(
         kubectl,
         manifestObjects.serviceNameMap,
         manifestObjects.ingressEntityList
      )

      await deleteGreenObjects(
         kubectl,
         [].concat(
            manifestObjects.deploymentEntityList,
            manifestObjects.serviceEntityList
         )
      )
   } else if (routeStrategy == RouteStrategy.SMI) {
      await routeBlueGreenSMI(
         kubectl,
         NONE_LABEL_VALUE,
         manifestObjects.serviceEntityList
      )
      await deleteGreenObjects(kubectl, manifestObjects.deploymentEntityList)
      await cleanupSMI(kubectl, manifestObjects.serviceEntityList)
   } else {
      await routeBlueGreenService(
         kubectl,
         NONE_LABEL_VALUE,
         manifestObjects.serviceEntityList
      )
      await deleteGreenObjects(kubectl, manifestObjects.deploymentEntityList)
   }
   core.endGroup()

   // annotate resources
   core.startGroup('Annotating resources')
   await annotateAndLabelResources(deployedManifestFiles, kubectl, resources)
   core.endGroup()
}