conversion.go

/*
Copyright 2015 The Kubernetes Authors All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package v1beta1

import (
	"fmt"
	"reflect"

	"k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/unversioned"
	v1 "k8s.io/kubernetes/pkg/api/v1"
	"k8s.io/kubernetes/pkg/apis/extensions"
	"k8s.io/kubernetes/pkg/conversion"
	"k8s.io/kubernetes/pkg/runtime"
	"k8s.io/kubernetes/pkg/util/intstr"
)

func addConversionFuncs(scheme *runtime.Scheme) {
	// Add non-generated conversion functions
	err := scheme.AddConversionFuncs(
		Convert_api_PodSpec_To_v1_PodSpec,
		Convert_v1_PodSpec_To_api_PodSpec,
		Convert_extensions_ScaleStatus_To_v1beta1_ScaleStatus,
		Convert_v1beta1_ScaleStatus_To_extensions_ScaleStatus,
		Convert_extensions_DeploymentSpec_To_v1beta1_DeploymentSpec,
		Convert_v1beta1_DeploymentSpec_To_extensions_DeploymentSpec,
		Convert_extensions_DeploymentStrategy_To_v1beta1_DeploymentStrategy,
		Convert_v1beta1_DeploymentStrategy_To_extensions_DeploymentStrategy,
		Convert_extensions_RollingUpdateDeployment_To_v1beta1_RollingUpdateDeployment,
		Convert_v1beta1_RollingUpdateDeployment_To_extensions_RollingUpdateDeployment,
		Convert_extensions_ReplicaSetSpec_To_v1beta1_ReplicaSetSpec,
		Convert_v1beta1_ReplicaSetSpec_To_extensions_ReplicaSetSpec,
		Convert_extensions_JobSpec_To_v1beta1_JobSpec,
		Convert_v1beta1_JobSpec_To_extensions_JobSpec,
	)
	if err != nil {
		// If one of the conversion functions is malformed, detect it immediately.
		panic(err)
	}

	// Add field label conversions for kinds having selectable nothing but ObjectMeta fields.
	for _, kind := range []string{"DaemonSet", "Deployment", "Ingress"} {
		err = api.Scheme.AddFieldLabelConversionFunc("extensions/v1beta1", kind,
			func(label, value string) (string, string, error) {
				switch label {
				case "metadata.name", "metadata.namespace":
					return label, value, nil
				default:
					return "", "", fmt.Errorf("field label %q not supported for %q", label, kind)
				}
			})
		if err != nil {
			// If one of the conversion functions is malformed, detect it immediately.
			panic(err)
		}
	}

	err = api.Scheme.AddFieldLabelConversionFunc("extensions/v1beta1", "Job",
		func(label, value string) (string, string, error) {
			switch label {
			case "metadata.name", "metadata.namespace", "status.successful":
				return label, value, nil
			default:
				return "", "", fmt.Errorf("field label not supported: %s", label)
			}
		})
	if err != nil {
		// If one of the conversion functions is malformed, detect it immediately.
		panic(err)
	}
}

// The following two PodSpec conversions functions where copied from pkg/api/conversion.go
// for the generated functions to work properly.
// This should be fixed: https://github.com/kubernetes/kubernetes/issues/12977
func Convert_api_PodSpec_To_v1_PodSpec(in *api.PodSpec, out *v1.PodSpec, s conversion.Scope) error {
	return v1.Convert_api_PodSpec_To_v1_PodSpec(in, out, s)
}

func Convert_v1_PodSpec_To_api_PodSpec(in *v1.PodSpec, out *api.PodSpec, s conversion.Scope) error {
	return v1.Convert_v1_PodSpec_To_api_PodSpec(in, out, s)
}

func Convert_extensions_ScaleStatus_To_v1beta1_ScaleStatus(in *extensions.ScaleStatus, out *ScaleStatus, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*extensions.ScaleStatus))(in)
	}
	out.Replicas = int32(in.Replicas)

	out.Selector = nil
	out.TargetSelector = ""
	if in.Selector != nil {
		if in.Selector.MatchExpressions == nil || len(in.Selector.MatchExpressions) == 0 {
			out.Selector = in.Selector.MatchLabels
		}

		selector, err := unversioned.LabelSelectorAsSelector(in.Selector)
		if err != nil {
			return fmt.Errorf("invalid label selector: %v", err)
		}
		out.TargetSelector = selector.String()
	}
	return nil
}

func Convert_v1beta1_ScaleStatus_To_extensions_ScaleStatus(in *ScaleStatus, out *extensions.ScaleStatus, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*ScaleStatus))(in)
	}
	out.Replicas = int(in.Replicas)

	// Normally when 2 fields map to the same internal value we favor the old field, since
	// old clients can't be expected to know about new fields but clients that know about the
	// new field can be expected to know about the old field (though that's not quite true, due
	// to kubectl apply). However, these fields are readonly, so any non-nil value should work.
	if in.TargetSelector != "" {
		labelSelector, err := unversioned.ParseToLabelSelector(in.TargetSelector)
		if err != nil {
			out.Selector = nil
			return fmt.Errorf("failed to parse target selector: %v", err)
		}
		out.Selector = labelSelector
	} else if in.Selector != nil {
		out.Selector = new(unversioned.LabelSelector)
		selector := make(map[string]string)
		for key, val := range in.Selector {
			selector[key] = val
		}
		out.Selector.MatchLabels = selector
	} else {
		out.Selector = nil
	}
	return nil
}

func Convert_extensions_DeploymentSpec_To_v1beta1_DeploymentSpec(in *extensions.DeploymentSpec, out *DeploymentSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*extensions.DeploymentSpec))(in)
	}
	out.Replicas = new(int32)
	*out.Replicas = int32(in.Replicas)
	if in.Selector != nil {
		out.Selector = new(LabelSelector)
		if err := Convert_unversioned_LabelSelector_To_v1beta1_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}
	if err := v1.Convert_api_PodTemplateSpec_To_v1_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	if err := Convert_extensions_DeploymentStrategy_To_v1beta1_DeploymentStrategy(&in.Strategy, &out.Strategy, s); err != nil {
		return err
	}
	if in.RevisionHistoryLimit != nil {
		out.RevisionHistoryLimit = new(int32)
		*out.RevisionHistoryLimit = int32(*in.RevisionHistoryLimit)
	}
	out.MinReadySeconds = int32(in.MinReadySeconds)
	out.Paused = in.Paused
	if in.RollbackTo != nil {
		out.RollbackTo = new(RollbackConfig)
		out.RollbackTo.Revision = int64(in.RollbackTo.Revision)
	} else {
		out.RollbackTo = nil
	}
	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 = 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
	}
	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_extensions_DeploymentStrategy_To_v1beta1_DeploymentStrategy(in *extensions.DeploymentStrategy, out *DeploymentStrategy, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*extensions.DeploymentStrategy))(in)
	}
	out.Type = DeploymentStrategyType(in.Type)
	if in.RollingUpdate != nil {
		out.RollingUpdate = new(RollingUpdateDeployment)
		if err := Convert_extensions_RollingUpdateDeployment_To_v1beta1_RollingUpdateDeployment(in.RollingUpdate, out.RollingUpdate, s); err != nil {
			return err
		}
	} else {
		out.RollingUpdate = nil
	}
	return nil
}

func Convert_v1beta1_DeploymentStrategy_To_extensions_DeploymentStrategy(in *DeploymentStrategy, out *extensions.DeploymentStrategy, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*DeploymentStrategy))(in)
	}
	out.Type = extensions.DeploymentStrategyType(in.Type)
	if in.RollingUpdate != nil {
		out.RollingUpdate = new(extensions.RollingUpdateDeployment)
		if err := Convert_v1beta1_RollingUpdateDeployment_To_extensions_RollingUpdateDeployment(in.RollingUpdate, out.RollingUpdate, s); err != nil {
			return err
		}
	} else {
		out.RollingUpdate = nil
	}
	return nil
}

func Convert_extensions_RollingUpdateDeployment_To_v1beta1_RollingUpdateDeployment(in *extensions.RollingUpdateDeployment, out *RollingUpdateDeployment, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*extensions.RollingUpdateDeployment))(in)
	}
	if out.MaxUnavailable == nil {
		out.MaxUnavailable = &intstr.IntOrString{}
	}
	if err := s.Convert(&in.MaxUnavailable, out.MaxUnavailable, 0); err != nil {
		return err
	}
	if out.MaxSurge == nil {
		out.MaxSurge = &intstr.IntOrString{}
	}
	if err := s.Convert(&in.MaxSurge, out.MaxSurge, 0); err != nil {
		return err
	}
	return nil
}

func Convert_v1beta1_RollingUpdateDeployment_To_extensions_RollingUpdateDeployment(in *RollingUpdateDeployment, out *extensions.RollingUpdateDeployment, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*RollingUpdateDeployment))(in)
	}
	if err := s.Convert(in.MaxUnavailable, &out.MaxUnavailable, 0); err != nil {
		return err
	}
	if err := s.Convert(in.MaxSurge, &out.MaxSurge, 0); err != nil {
		return err
	}
	return nil
}

func Convert_extensions_ReplicaSetSpec_To_v1beta1_ReplicaSetSpec(in *extensions.ReplicaSetSpec, out *ReplicaSetSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*extensions.ReplicaSetSpec))(in)
	}
	out.Replicas = new(int32)
	*out.Replicas = int32(in.Replicas)
	if in.Selector != nil {
		out.Selector = new(LabelSelector)
		if err := Convert_unversioned_LabelSelector_To_v1beta1_LabelSelector(in.Selector, out.Selector, s); err != nil {
			return err
		}
	} else {
		out.Selector = nil
	}

	if err := v1.Convert_api_PodTemplateSpec_To_v1_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 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 err := v1.Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}

func Convert_extensions_JobSpec_To_v1beta1_JobSpec(in *extensions.JobSpec, out *JobSpec, s conversion.Scope) error {
	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
		defaulting.(func(*extensions.JobSpec))(in)
	}
	if in.Parallelism != nil {
		out.Parallelism = new(int32)
		*out.Parallelism = int32(*in.Parallelism)
	} else {
		out.Parallelism = nil
	}
	if in.Completions != nil {
		out.Completions = new(int32)
		*out.Completions = int32(*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 unversioned.LabelSelector -> v1beta1.LabelSelector
	if in.Selector != nil {
		out.Selector = new(LabelSelector)
		if err := Convert_unversioned_LabelSelector_To_v1beta1_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.
	manualSelector := in.ManualSelector != nil && *in.ManualSelector
	autoSelector := !manualSelector
	if autoSelector {
		out.AutoSelector = new(bool)
		*out.AutoSelector = true
	} else {
		out.AutoSelector = nil
	}
	// END non-standard conversion

	if err := Convert_api_PodTemplateSpec_To_v1_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	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 := Convert_v1_PodTemplateSpec_To_api_PodTemplateSpec(&in.Template, &out.Template, s); err != nil {
		return err
	}
	return nil
}