function isCandidateForHotswapping()

in packages/@aws-cdk/toolkit-lib/lib/api/hotswap/hotswap-deployments.ts [434:495]
58 lines of code
4 McCabe index (conditional complexity)

function isCandidateForHotswapping(
  logicalId: string,
  change: cfn_diff.ResourceDifference,
  evaluateCfnTemplate: EvaluateCloudFormationTemplate,
): RejectedChange | ResourceChange {
  // a resource has been removed OR a resource has been added; we can't short-circuit that change
  if (!change.oldValue) {
    return {
      hotswappable: false,
      change: {
        reason: NonHotswappableReason.RESOURCE_CREATION,
        description: `resource '${logicalId}' was created by this deployment`,
        subject: {
          type: 'Resource',
          logicalId,
          resourceType: change.newValue!.Type,
          metadata: evaluateCfnTemplate.metadataFor(logicalId),
        },
      },
    };
  } else if (!change.newValue) {
    return {
      hotswappable: false,
      logicalId,
      change: {
        reason: NonHotswappableReason.RESOURCE_DELETION,
        description: `resource '${logicalId}' was destroyed by this deployment`,
        subject: {
          type: 'Resource',
          logicalId,
          resourceType: change.oldValue.Type,
          metadata: evaluateCfnTemplate.metadataFor(logicalId),
        },
      },
    };
  }

  // a resource has had its type changed
  if (change.newValue.Type !== change.oldValue.Type) {
    return {
      hotswappable: false,
      change: {
        reason: NonHotswappableReason.RESOURCE_TYPE_CHANGED,
        description: `resource '${logicalId}' had its type changed from '${change.oldValue?.Type}' to '${change.newValue?.Type}'`,
        subject: {
          type: 'Resource',
          logicalId,
          resourceType: change.newValue.Type,
          metadata: evaluateCfnTemplate.metadataFor(logicalId),
        },
      },
    };
  }

  return {
    logicalId,
    oldValue: change.oldValue,
    newValue: change.newValue,
    propertyUpdates: change.propertyUpdates,
    metadata: evaluateCfnTemplate.metadataFor(logicalId),
  };
}