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templateinstances.go
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templateinstances.go
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package templateinstances
import (
"fmt"
"sort"
"strings"
"github.com/spf13/cobra"
"k8s.io/apimachinery/pkg/runtime"
kapi "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
kcmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/genericclioptions"
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/resource"
"github.com/openshift/origin/pkg/oc/cli/admin/migrate"
templateapi "github.com/openshift/origin/pkg/template/apis/template"
templateclientset "github.com/openshift/origin/pkg/template/generated/internalclientset"
templateinternalclient "github.com/openshift/origin/pkg/template/generated/internalclientset/typed/template/internalversion"
)
type apiType struct {
Kind string
APIVersion string
}
var (
transforms = map[apiType]apiType{
// legacy oapi group
{"DeploymentConfig", "v1"}: {"DeploymentConfig", "apps.openshift.io/v1"},
{"BuildConfig", "v1"}: {"BuildConfig", "build.openshift.io/v1"},
{"Build", "v1"}: {"Build", "build.openshift.io/v1"},
{"Route", "v1"}: {"Route", "route.openshift.io/v1"},
// legacy oapi group, for the lazy
{"DeploymentConfig", ""}: {"DeploymentConfig", "apps.openshift.io/v1"},
{"BuildConfig", ""}: {"BuildConfig", "build.openshift.io/v1"},
{"Build", ""}: {"Build", "build.openshift.io/v1"},
{"Route", ""}: {"Route", "route.openshift.io/v1"},
}
internalMigrateTemplateInstancesLong = templates.LongDesc(fmt.Sprintf(`
Migrate Template Instances to refer to new API groups
This command locates and updates every Template Instance which refers to a particular
group-version-kind to refer to some other, equivalent group-version-kind.
The following transformations will occur:
%s`, prettyPrintMigrations(transforms)))
internalMigrateTemplateInstancesExample = templates.Examples(`
# Perform a dry-run of updating all objects
%[1]s
# To actually perform the update, the confirm flag must be appended
%[1]s --confirm`)
)
func prettyPrintMigrations(versionKinds map[apiType]apiType) string {
lines := make([]string, 0, len(versionKinds))
for initial, final := range versionKinds {
line := fmt.Sprintf(" - %s.%s --> %s.%s", initial.APIVersion, initial.Kind, final.APIVersion, final.Kind)
lines = append(lines, line)
}
sort.Strings(lines)
return strings.Join(lines, "\n")
}
type MigrateTemplateInstancesOptions struct {
templateClient templateinternalclient.TemplateInterface
migrate.ResourceOptions
transforms map[apiType]apiType
}
func NewMigrateTemplateInstancesOptions(streams genericclioptions.IOStreams) *MigrateTemplateInstancesOptions {
return &MigrateTemplateInstancesOptions{
ResourceOptions: migrate.ResourceOptions{
IOStreams: streams,
AllNamespaces: true,
Include: []string{"templateinstance"},
},
transforms: transforms,
}
}
// NewCmdMigrateTemplateInstancesAPI implements a MigrateTemplateInstances command
func NewCmdMigrateTemplateInstances(name, fullName string, f kcmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
o := NewMigrateTemplateInstancesOptions(streams)
cmd := &cobra.Command{
Use: name,
Short: "Update TemplateInstances to point to the latest group-version-kinds",
Long: internalMigrateTemplateInstancesLong,
Example: fmt.Sprintf(internalMigrateTemplateInstancesExample, fullName),
Run: func(cmd *cobra.Command, args []string) {
kcmdutil.CheckErr(o.Complete(name, f, cmd, args))
kcmdutil.CheckErr(o.Validate())
kcmdutil.CheckErr(o.Run())
},
}
o.ResourceOptions.Bind(cmd)
return cmd
}
func (o *MigrateTemplateInstancesOptions) Complete(name string, f kcmdutil.Factory, c *cobra.Command, args []string) error {
if len(args) != 0 {
return fmt.Errorf("%s takes no positional arguments", name)
}
o.ResourceOptions.SaveFn = o.save
if err := o.ResourceOptions.Complete(f, c); err != nil {
return err
}
clientConfig, err := f.ToRESTConfig()
if err != nil {
return err
}
templateClient, err := templateclientset.NewForConfig(clientConfig)
if err != nil {
return err
}
o.templateClient = templateClient.Template()
return nil
}
func (o MigrateTemplateInstancesOptions) Validate() error {
return o.ResourceOptions.Validate()
}
func (o MigrateTemplateInstancesOptions) Run() error {
return o.ResourceOptions.Visitor().Visit(func(info *resource.Info) (migrate.Reporter, error) {
return o.checkAndTransform(info.Object)
})
}
func (o *MigrateTemplateInstancesOptions) checkAndTransform(templateInstanceRaw runtime.Object) (migrate.Reporter, error) {
templateInstance, wasTI := templateInstanceRaw.(*templateapi.TemplateInstance)
if !wasTI {
return nil, fmt.Errorf("unrecognized object %#v", templateInstanceRaw)
}
updated := false
for i, obj := range templateInstance.Status.Objects {
if newType, changed := o.transform(obj.Ref); changed {
templateInstance.Status.Objects[i].Ref.Kind = newType.Kind
templateInstance.Status.Objects[i].Ref.APIVersion = newType.APIVersion
updated = true
}
}
return migrate.ReporterBool(updated), nil
}
func (o *MigrateTemplateInstancesOptions) transform(ref kapi.ObjectReference) (apiType, bool) {
oldType := apiType{ref.Kind, ref.APIVersion}
if newType, ok := o.transforms[oldType]; ok {
return newType, true
}
return oldType, false
}
// save invokes the API to alter an object. The reporter passed to this method is the same returned by
// the migration visitor method. It should return an error if the input type cannot be saved
// It returns migrate.ErrRecalculate if migration should be re-run on the provided object.
func (o *MigrateTemplateInstancesOptions) save(info *resource.Info, reporter migrate.Reporter) error {
templateInstance, wasTI := info.Object.(*templateapi.TemplateInstance)
if !wasTI {
return fmt.Errorf("unrecognized object %#v", info.Object)
}
_, err := o.templateClient.TemplateInstances(templateInstance.Namespace).UpdateStatus(templateInstance)
return migrate.DefaultRetriable(info, err)
}