func simpleDryRun(deployment *extensions.Deployment, c clientset.Interface, toRevision int64) (string, error) {
	externalDeployment := &externalextensions.Deployment{}
	if err := api.Scheme.Convert(deployment, externalDeployment, nil); err != nil {
		return "", fmt.Errorf("failed to convert deployment, %v", err)
	}
	versionedClient := versionedClientsetForDeployment(c)
	_, allOldRSs, newRS, err := deploymentutil.GetAllReplicaSets(externalDeployment, versionedClient)
	if err != nil {
		return "", fmt.Errorf("failed to retrieve replica sets from deployment %s: %v", deployment.Name, err)
	}
	allRSs := allOldRSs
	if newRS != nil {
		allRSs = append(allRSs, newRS)
	}

	revisionToSpec := make(map[int64]*v1.PodTemplateSpec)
	for _, rs := range allRSs {
		v, err := deploymentutil.Revision(rs)
		if err != nil {
			continue
		}
		revisionToSpec[v] = &rs.Spec.Template
	}

	if len(revisionToSpec) == 0 {
		return "No rollout history found.", nil
	}

	if toRevision > 0 {
		template, ok := revisionToSpec[toRevision]
		if !ok {
			return "", fmt.Errorf("unable to find specified revision")
		}
		buf := bytes.NewBuffer([]byte{})
		internalTemplate := &api.PodTemplateSpec{}
		if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(template, internalTemplate, nil); err != nil {
			return "", fmt.Errorf("failed to convert podtemplate, %v", err)
		}
		DescribePodTemplate(internalTemplate, buf)
		return buf.String(), nil
	}

	// Sort the revisionToSpec map by revision
	revisions := make([]int64, 0, len(revisionToSpec))
	for r := range revisionToSpec {
		revisions = append(revisions, r)
	}
	sliceutil.SortInts64(revisions)

	template, _ := revisionToSpec[revisions[len(revisions)-1]]
	buf := bytes.NewBuffer([]byte{})
	buf.WriteString("\n")
	internalTemplate := &api.PodTemplateSpec{}
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(template, internalTemplate, nil); err != nil {
		return "", fmt.Errorf("failed to convert podtemplate, %v", err)
	}
	DescribePodTemplate(internalTemplate, buf)
	return buf.String(), nil
}

func Convert_v1beta1_JobSpec_To_batch_JobSpec(in *JobSpec, out *batch.JobSpec, s conversion.Scope) error {
	out.Parallelism = in.Parallelism
	out.Completions = in.Completions
	out.ActiveDeadlineSeconds = in.ActiveDeadlineSeconds
	// unable to generate simple pointer conversion for v1beta1.LabelSelector -> unversioned.LabelSelector
	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v1beta1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}

	// BEGIN non-standard conversion
	// autoSelector has opposite meaning as manualSelector.
	// in both cases, unset means false, and unset is always preferred to false.
	// unset vs set-false distinction is not preserved.
	autoSelector := bool(in.AutoSelector != nil && *in.AutoSelector)
	manualSelector := !autoSelector
	if manualSelector {
		out.ManualSelector = new(bool)
		*out.ManualSelector = true
	} else {
		out.ManualSelector = nil
	}
	// END non-standard conversion

	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func Convert_v1beta1_DeploymentSpec_To_extensions_DeploymentSpec(in *DeploymentSpec, out *extensions.DeploymentSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*DeploymentSpec))(in)
	}
	if in.Replicas != nil {
		out.Replicas = *in.Replicas
	}

	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v1beta1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	if err := Convert_v1beta1_DeploymentStrategy_To_extensions_DeploymentStrategy(&in.Strategy, &out.Strategy, s); err != nil {
		return err
	}
	out.RevisionHistoryLimit = in.RevisionHistoryLimit
	out.MinReadySeconds = in.MinReadySeconds
	out.Paused = in.Paused
	if in.RollbackTo != nil {
		out.RollbackTo = new(extensions.RollbackConfig)
		out.RollbackTo.Revision = in.RollbackTo.Revision
	} else {
		out.RollbackTo = nil
	}
	return nil
}

func Convert_v2alpha1_JobSpec_To_batch_JobSpec(in *JobSpec, out *batch.JobSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*JobSpec))(in)
	}
	out.Parallelism = in.Parallelism
	out.Completions = in.Completions
	out.ActiveDeadlineSeconds = in.ActiveDeadlineSeconds
	// unable to generate simple pointer conversion for unversioned.LabelSelector -> v1.LabelSelector
	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v2alpha1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if in.ManualSelector != nil {
		out.ManualSelector = new(bool)
		*out.ManualSelector = *in.ManualSelector
	} else {
		out.ManualSelector = nil
	}

	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1_DeploymentConfigSpec_To_api_DeploymentConfigSpec(in *DeploymentConfigSpec, out *api.DeploymentConfigSpec, s conversion.Scope) error {
	SetDefaults_DeploymentConfigSpec(in)
	if err := Convert_v1_DeploymentStrategy_To_api_DeploymentStrategy(&in.Strategy, &out.Strategy, s); err != nil {
		return err
	}
	out.MinReadySeconds = in.MinReadySeconds
	if in.Triggers != nil {
		in, out := &in.Triggers, &out.Triggers
		*out = make([]api.DeploymentTriggerPolicy, len(*in))
		for i := range *in {
			if err := Convert_v1_DeploymentTriggerPolicy_To_api_DeploymentTriggerPolicy(&(*in)[i], &(*out)[i], s); err != nil {
				return err
			}
		}
	} else {
		out.Triggers = nil
	}
	out.Replicas = in.Replicas
	out.RevisionHistoryLimit = in.RevisionHistoryLimit
	out.Test = in.Test
	out.Paused = in.Paused
	out.Selector = in.Selector
	if in.Template != nil {
		in, out := &in.Template, &out.Template
		*out = new(pkg_api.PodTemplateSpec)
		if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(*in, *out, s); err != nil {
			return err
		}
	} else {
		out.Template = nil
	}
	return nil
}

func Convert_v1_JobSpec_To_batch_JobSpec(in *JobSpec, out *batch.JobSpec, s conversion.Scope) error {
	out.Parallelism = in.Parallelism
	out.Completions = in.Completions
	out.ActiveDeadlineSeconds = in.ActiveDeadlineSeconds
	// unable to generate simple pointer conversion for v1.LabelSelector -> unversioned.LabelSelector
	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if in.ManualSelector != nil {
		out.ManualSelector = new(bool)
		*out.ManualSelector = *in.ManualSelector
	} else {
		out.ManualSelector = nil
	}

	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1_PodSecurityPolicyReviewSpec_To_api_PodSecurityPolicyReviewSpec(in *PodSecurityPolicyReviewSpec, out *api.PodSecurityPolicyReviewSpec, s conversion.Scope) error {
	if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	out.ServiceAccountNames = in.ServiceAccountNames
	return nil
}

func Convert_v1beta1_DeploymentSpec_To_extensions_DeploymentSpec(in *DeploymentSpec, out *extensions.DeploymentSpec, s conversion.Scope) error {
	if in.Replicas != nil {
		out.Replicas = *in.Replicas
	}
	out.Selector = in.Selector
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	if err := Convert_v1beta1_DeploymentStrategy_To_extensions_DeploymentStrategy(&in.Strategy, &out.Strategy, s); err != nil {
		return err
	}
	out.RevisionHistoryLimit = in.RevisionHistoryLimit
	out.MinReadySeconds = in.MinReadySeconds
	out.Paused = in.Paused
	if in.RollbackTo != nil {
		out.RollbackTo = new(extensions.RollbackConfig)
		out.RollbackTo.Revision = in.RollbackTo.Revision
	} else {
		out.RollbackTo = nil
	}
	if in.ProgressDeadlineSeconds != nil {
		out.ProgressDeadlineSeconds = new(int32)
		*out.ProgressDeadlineSeconds = *in.ProgressDeadlineSeconds
	}
	return nil
}

func Convert_v1beta1_DeploymentSpec_To_extensions_DeploymentSpec(in *DeploymentSpec, out *extensions.DeploymentSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*DeploymentSpec))(in)
	}
	if in.Replicas != nil {
		out.Replicas = int(*in.Replicas)
	}
	if in.Selector != nil {
		out.Selector = make(map[string]string)
		for key, val := range in.Selector {
			out.Selector[key] = val
		}
	} else {
		out.Selector = nil
	}
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	if err := Convert_v1beta1_DeploymentStrategy_To_extensions_DeploymentStrategy(&in.Strategy, &out.Strategy, s); err != nil {
		return err
	}
	if in.RevisionHistoryLimit != nil {
		out.RevisionHistoryLimit = new(int)
		*out.RevisionHistoryLimit = int(*in.RevisionHistoryLimit)
	}
	out.MinReadySeconds = int(in.MinReadySeconds)
	out.Paused = in.Paused
	if in.RollbackTo != nil {
		out.RollbackTo = new(extensions.RollbackConfig)
		out.RollbackTo.Revision = in.RollbackTo.Revision
	} else {
		out.RollbackTo = nil
	}
	return nil
}

func Convert_v1beta1_ReplicaSetSpec_To_extensions_ReplicaSetSpec(in *ReplicaSetSpec, out *extensions.ReplicaSetSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*ReplicaSetSpec))(in)
	}
	if in.Replicas != nil {
		out.Replicas = int(*in.Replicas)
	}
	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v1beta1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if in.Template != nil {
		out.Template = new(api.PodTemplateSpec)
		if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(in.Template, out.Template, s); err != nil {
			return err
		}
	} else {
		out.Template = nil
	}
	return nil
}

func autoConvert_v1_PodSecurityPolicySubjectReviewSpec_To_api_PodSecurityPolicySubjectReviewSpec(in *PodSecurityPolicySubjectReviewSpec, out *api.PodSecurityPolicySubjectReviewSpec, s conversion.Scope) error {
	if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	out.User = in.User
	out.Groups = in.Groups
	return nil
}

func Convert_v1beta1_ReplicaSetSpec_To_extensions_ReplicaSetSpec(in *ReplicaSetSpec, out *extensions.ReplicaSetSpec, s conversion.Scope) error {
	if in.Replicas != nil {
		out.Replicas = *in.Replicas
	}
	out.MinReadySeconds = in.MinReadySeconds
	out.Selector = in.Selector
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1_JobSpec_To_batch_JobSpec(in *JobSpec, out *batch.JobSpec, s conversion.Scope) error {
	out.Parallelism = (*int32)(unsafe.Pointer(in.Parallelism))
	out.Completions = (*int32)(unsafe.Pointer(in.Completions))
	out.ActiveDeadlineSeconds = (*int64)(unsafe.Pointer(in.ActiveDeadlineSeconds))
	out.Selector = (*unversioned.LabelSelector)(unsafe.Pointer(in.Selector))
	out.ManualSelector = (*bool)(unsafe.Pointer(in.ManualSelector))
	if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1beta1_StatefulSetSpec_To_apps_StatefulSetSpec(in *StatefulSetSpec, out *apps.StatefulSetSpec, s conversion.Scope) error {
	if err := api.Convert_Pointer_int32_To_int32(&in.Replicas, &out.Replicas, s); err != nil {
		return err
	}
	out.Selector = (*v1.LabelSelector)(unsafe.Pointer(in.Selector))
	if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	out.VolumeClaimTemplates = *(*[]api.PersistentVolumeClaim)(unsafe.Pointer(&in.VolumeClaimTemplates))
	out.ServiceName = in.ServiceName
	return nil
}

func Convert_v1beta1_JobSpec_To_extensions_JobSpec(in *JobSpec, out *extensions.JobSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*JobSpec))(in)
	}
	if in.Parallelism != nil {
		out.Parallelism = new(int)
		*out.Parallelism = int(*in.Parallelism)
	} else {
		out.Parallelism = nil
	}
	if in.Completions != nil {
		out.Completions = new(int)
		*out.Completions = int(*in.Completions)
	} else {
		out.Completions = nil
	}
	if in.ActiveDeadlineSeconds != nil {
		out.ActiveDeadlineSeconds = new(int64)
		*out.ActiveDeadlineSeconds = *in.ActiveDeadlineSeconds
	} else {
		out.ActiveDeadlineSeconds = nil
	}
	// unable to generate simple pointer conversion for v1beta1.LabelSelector -> unversioned.LabelSelector
	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v1beta1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}

	// BEGIN non-standard conversion
	// autoSelector has opposite meaning as manualSelector.
	// in both cases, unset means false, and unset is always preferred to false.
	// unset vs set-false distinction is not preserved.
	autoSelector := bool(in.AutoSelector != nil && *in.AutoSelector)
	manualSelector := !autoSelector
	if manualSelector {
		out.ManualSelector = new(bool)
		*out.ManualSelector = true
	} else {
		out.ManualSelector = nil
	}
	// END non-standard conversion

	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1_PodSecurityPolicySubjectReviewStatus_To_api_PodSecurityPolicySubjectReviewStatus(in *PodSecurityPolicySubjectReviewStatus, out *api.PodSecurityPolicySubjectReviewStatus, s conversion.Scope) error {
	if in.AllowedBy != nil {
		in, out := &in.AllowedBy, &out.AllowedBy
		*out = new(pkg_api.ObjectReference)
		if err := api_v1.Convert_v1_ObjectReference_To_api_ObjectReference(*in, *out, s); err != nil {
			return err
		}
	} else {
		out.AllowedBy = nil
	}
	out.Reason = in.Reason
	if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func Convert_v1beta1_ReplicaSetSpec_To_extensions_ReplicaSetSpec(in *ReplicaSetSpec, out *extensions.ReplicaSetSpec, s conversion.Scope) error {
	if in.Replicas != nil {
		out.Replicas = *in.Replicas
	}
	if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		if err := Convert_v1beta1_LabelSelector_To_unversioned_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1_JobSpec_To_batch_JobSpec(in *JobSpec, out *batch.JobSpec, s conversion.Scope) error {
	out.Parallelism = in.Parallelism
	out.Completions = in.Completions
	out.ActiveDeadlineSeconds = in.ActiveDeadlineSeconds
	if in.Selector != nil {
		in, out := &in.Selector, &out.Selector
		*out = new(unversioned.LabelSelector)
		if err := Convert_v1_LabelSelector_To_unversioned_LabelSelector(*in, *out, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	out.ManualSelector = in.ManualSelector
	if err := api_v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v2alpha1_JobSpec_To_batch_JobSpec(in *JobSpec, out *batch.JobSpec, s conversion.Scope) error {
	if in.Parallelism != nil {
		in, out := &in.Parallelism, &out.Parallelism
		*out = new(int32)
		**out = **in
	} else {
		out.Parallelism = nil
	}
	if in.Completions != nil {
		in, out := &in.Completions, &out.Completions
		*out = new(int32)
		**out = **in
	} else {
		out.Completions = nil
	}
	if in.ActiveDeadlineSeconds != nil {
		in, out := &in.ActiveDeadlineSeconds, &out.ActiveDeadlineSeconds
		*out = new(int64)
		**out = **in
	} else {
		out.ActiveDeadlineSeconds = nil
	}
	if in.Selector != nil {
		in, out := &in.Selector, &out.Selector
		*out = new(unversioned.LabelSelector)
		if err := Convert_v2alpha1_LabelSelector_To_unversioned_LabelSelector(*in, *out, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if in.ManualSelector != nil {
		in, out := &in.ManualSelector, &out.ManualSelector
		*out = new(bool)
		**out = **in
	} else {
		out.ManualSelector = nil
	}
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func autoConvert_v1alpha1_PetSetSpec_To_apps_PetSetSpec(in *PetSetSpec, out *apps.PetSetSpec, s conversion.Scope) error {
	// WARNING: in.Replicas requires manual conversion: inconvertible types (*int32 vs int)
	out.Selector = in.Selector
	if err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	if in.VolumeClaimTemplates != nil {
		in, out := &in.VolumeClaimTemplates, &out.VolumeClaimTemplates
		*out = make([]api.PersistentVolumeClaim, len(*in))
		for i := range *in {
			// TODO: Inefficient conversion - can we improve it?
			if err := s.Convert(&(*in)[i], &(*out)[i], 0); err != nil {
				return err
			}
		}
	} else {
		out.VolumeClaimTemplates = nil
	}
	out.ServiceName = in.ServiceName
	return nil
}