mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-30 23:15:14 +00:00
Move, but do not refactor, printers to their own package
This commit is contained in:
Clayton Coleman
parent
c36eee2a0c
commit
6d1c7308a5
@ -1,86 +0,0 @@
|
||||
/*
|
||||
Copyright 2014 The Kubernetes Authors.
|
||||
|
||||
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 kubectl
|
||||
|
||||
import (
|
||||
"sort"
|
||||
|
||||
"k8s.io/kubernetes/pkg/api"
|
||||
"k8s.io/kubernetes/pkg/kubelet/qos"
|
||||
)
|
||||
|
||||
type SortableResourceNames []api.ResourceName
|
||||
|
||||
func (list SortableResourceNames) Len() int {
|
||||
return len(list)
|
||||
}
|
||||
|
||||
func (list SortableResourceNames) Swap(i, j int) {
|
||||
list[i], list[j] = list[j], list[i]
|
||||
}
|
||||
|
||||
func (list SortableResourceNames) Less(i, j int) bool {
|
||||
return list[i] < list[j]
|
||||
}
|
||||
|
||||
// SortedResourceNames returns the sorted resource names of a resource list.
|
||||
func SortedResourceNames(list api.ResourceList) []api.ResourceName {
|
||||
resources := make([]api.ResourceName, 0, len(list))
|
||||
for res := range list {
|
||||
resources = append(resources, res)
|
||||
}
|
||||
sort.Sort(SortableResourceNames(resources))
|
||||
return resources
|
||||
}
|
||||
|
||||
type SortableResourceQuotas []api.ResourceQuota
|
||||
|
||||
func (list SortableResourceQuotas) Len() int {
|
||||
return len(list)
|
||||
}
|
||||
|
||||
func (list SortableResourceQuotas) Swap(i, j int) {
|
||||
list[i], list[j] = list[j], list[i]
|
||||
}
|
||||
|
||||
func (list SortableResourceQuotas) Less(i, j int) bool {
|
||||
return list[i].Name < list[j].Name
|
||||
}
|
||||
|
||||
type SortableVolumeMounts []api.VolumeMount
|
||||
|
||||
func (list SortableVolumeMounts) Len() int {
|
||||
return len(list)
|
||||
}
|
||||
|
||||
func (list SortableVolumeMounts) Swap(i, j int) {
|
||||
list[i], list[j] = list[j], list[i]
|
||||
}
|
||||
|
||||
func (list SortableVolumeMounts) Less(i, j int) bool {
|
||||
return list[i].MountPath < list[j].MountPath
|
||||
}
|
||||
|
||||
// SortedQoSResourceNames returns the sorted resource names of a QoS list.
|
||||
func SortedQoSResourceNames(list qos.QOSList) []api.ResourceName {
|
||||
resources := make([]api.ResourceName, 0, len(list))
|
||||
for res := range list {
|
||||
resources = append(resources, api.ResourceName(res))
|
||||
}
|
||||
sort.Sort(SortableResourceNames(resources))
|
||||
return resources
|
||||
}
|
||||
159
pkg/printers/humanreadable.go
Normal file
159
pkg/printers/humanreadable.go
Normal file
@ -0,0 +1,159 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"reflect"
|
||||
"strings"
|
||||
|
||||
"github.com/golang/glog"
|
||||
)
|
||||
|
||||
type handlerEntry struct {
|
||||
columns []string
|
||||
columnsWithWide []string
|
||||
printFunc reflect.Value
|
||||
args []reflect.Value
|
||||
}
|
||||
|
||||
// HumanReadablePrinter is an implementation of ResourcePrinter which attempts to provide
|
||||
// more elegant output. It is not threadsafe, but you may call PrintObj repeatedly; headers
|
||||
// will only be printed if the object type changes. This makes it useful for printing items
|
||||
// received from watches.
|
||||
type HumanReadablePrinter struct {
|
||||
handlerMap map[reflect.Type]*handlerEntry
|
||||
options PrintOptions
|
||||
lastType reflect.Type
|
||||
hiddenObjNum int
|
||||
}
|
||||
|
||||
// NewHumanReadablePrinter creates a HumanReadablePrinter.
|
||||
func NewHumanReadablePrinter(options PrintOptions) *HumanReadablePrinter {
|
||||
printer := &HumanReadablePrinter{
|
||||
handlerMap: make(map[reflect.Type]*handlerEntry),
|
||||
options: options,
|
||||
}
|
||||
printer.addDefaultHandlers()
|
||||
return printer
|
||||
}
|
||||
|
||||
// formatResourceName receives a resource kind, name, and boolean specifying
|
||||
// whether or not to update the current name to "kind/name"
|
||||
func formatResourceName(kind, name string, withKind bool) string {
|
||||
if !withKind || kind == "" {
|
||||
return name
|
||||
}
|
||||
|
||||
return kind + "/" + name
|
||||
}
|
||||
|
||||
// GetResourceKind returns the type currently set for a resource
|
||||
func (h *HumanReadablePrinter) GetResourceKind() string {
|
||||
return h.options.Kind
|
||||
}
|
||||
|
||||
// EnsurePrintWithKind sets HumanReadablePrinter options "WithKind" to true
|
||||
// and "Kind" to the string arg it receives, pre-pending this string
|
||||
// to the "NAME" column in an output of resources.
|
||||
func (h *HumanReadablePrinter) EnsurePrintWithKind(kind string) {
|
||||
h.options.WithKind = true
|
||||
h.options.Kind = kind
|
||||
}
|
||||
|
||||
// EnsurePrintHeaders sets the HumanReadablePrinter option "NoHeaders" to false
|
||||
// and removes the .lastType that was printed, which forces headers to be
|
||||
// printed in cases where multiple lists of the same resource are printed
|
||||
// consecutively, but are separated by non-printer related information.
|
||||
func (h *HumanReadablePrinter) EnsurePrintHeaders() {
|
||||
h.options.NoHeaders = false
|
||||
h.lastType = nil
|
||||
}
|
||||
|
||||
// Handler adds a print handler with a given set of columns to HumanReadablePrinter instance.
|
||||
// See validatePrintHandlerFunc for required method signature.
|
||||
func (h *HumanReadablePrinter) Handler(columns, columnsWithWide []string, printFunc interface{}) error {
|
||||
printFuncValue := reflect.ValueOf(printFunc)
|
||||
if err := h.validatePrintHandlerFunc(printFuncValue); err != nil {
|
||||
glog.Errorf("Unable to add print handler: %v", err)
|
||||
return err
|
||||
}
|
||||
|
||||
objType := printFuncValue.Type().In(0)
|
||||
h.handlerMap[objType] = &handlerEntry{
|
||||
columns: columns,
|
||||
columnsWithWide: columnsWithWide,
|
||||
printFunc: printFuncValue,
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// validatePrintHandlerFunc validates print handler signature.
|
||||
// printFunc is the function that will be called to print an object.
|
||||
// It must be of the following type:
|
||||
// func printFunc(object ObjectType, w io.Writer, options PrintOptions) error
|
||||
// where ObjectType is the type of the object that will be printed.
|
||||
func (h *HumanReadablePrinter) validatePrintHandlerFunc(printFunc reflect.Value) error {
|
||||
if printFunc.Kind() != reflect.Func {
|
||||
return fmt.Errorf("invalid print handler. %#v is not a function", printFunc)
|
||||
}
|
||||
funcType := printFunc.Type()
|
||||
if funcType.NumIn() != 3 || funcType.NumOut() != 1 {
|
||||
return fmt.Errorf("invalid print handler." +
|
||||
"Must accept 3 parameters and return 1 value.")
|
||||
}
|
||||
if funcType.In(1) != reflect.TypeOf((*io.Writer)(nil)).Elem() ||
|
||||
funcType.In(2) != reflect.TypeOf((*PrintOptions)(nil)).Elem() ||
|
||||
funcType.Out(0) != reflect.TypeOf((*error)(nil)).Elem() {
|
||||
return fmt.Errorf("invalid print handler. The expected signature is: "+
|
||||
"func handler(obj %v, w io.Writer, options PrintOptions) error", funcType.In(0))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) HandledResources() []string {
|
||||
keys := make([]string, 0)
|
||||
|
||||
for k := range h.handlerMap {
|
||||
// k.String looks like "*api.PodList" and we want just "pod"
|
||||
api := strings.Split(k.String(), ".")
|
||||
resource := api[len(api)-1]
|
||||
if strings.HasSuffix(resource, "List") {
|
||||
continue
|
||||
}
|
||||
resource = strings.ToLower(resource)
|
||||
keys = append(keys, resource)
|
||||
}
|
||||
return keys
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) AfterPrint(output io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) unknown(data []byte, w io.Writer) error {
|
||||
_, err := fmt.Fprintf(w, "Unknown object: %s", string(data))
|
||||
return err
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) printHeader(columnNames []string, w io.Writer) error {
|
||||
if _, err := fmt.Fprintf(w, "%s\n", strings.Join(columnNames, "\t")); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
62
pkg/printers/interface.go
Normal file
62
pkg/printers/interface.go
Normal file
@ -0,0 +1,62 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"io"
|
||||
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
)
|
||||
|
||||
// ResourcePrinter is an interface that knows how to print runtime objects.
|
||||
type ResourcePrinter interface {
|
||||
// Print receives a runtime object, formats it and prints it to a writer.
|
||||
PrintObj(runtime.Object, io.Writer) error
|
||||
HandledResources() []string
|
||||
//Can be used to print out warning/clarifications if needed
|
||||
//after all objects were printed
|
||||
AfterPrint(io.Writer, string) error
|
||||
}
|
||||
|
||||
// ResourcePrinterFunc is a function that can print objects
|
||||
type ResourcePrinterFunc func(runtime.Object, io.Writer) error
|
||||
|
||||
// PrintObj implements ResourcePrinter
|
||||
func (fn ResourcePrinterFunc) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
return fn(obj, w)
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (fn ResourcePrinterFunc) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
func (fn ResourcePrinterFunc) AfterPrint(io.Writer, string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
type PrintOptions struct {
|
||||
NoHeaders bool
|
||||
WithNamespace bool
|
||||
WithKind bool
|
||||
Wide bool
|
||||
ShowAll bool
|
||||
ShowLabels bool
|
||||
AbsoluteTimestamps bool
|
||||
Kind string
|
||||
ColumnLabels []string
|
||||
}
|
||||
@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package kubectl
|
||||
package internalversion
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
@ -1,5 +1,5 @@
|
||||
/*
|
||||
Copyright 2014 The Kubernetes Authors.
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
@ -14,11 +14,10 @@ See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package kubectl
|
||||
package internalversion
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"io/ioutil"
|
||||
@ -27,18 +26,14 @@ import (
|
||||
"sort"
|
||||
"strings"
|
||||
"text/tabwriter"
|
||||
"text/template"
|
||||
"time"
|
||||
|
||||
"k8s.io/apimachinery/pkg/api/meta"
|
||||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||||
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
|
||||
"k8s.io/apimachinery/pkg/labels"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
"k8s.io/apimachinery/pkg/runtime/schema"
|
||||
utilerrors "k8s.io/apimachinery/pkg/util/errors"
|
||||
"k8s.io/apimachinery/pkg/util/sets"
|
||||
"k8s.io/client-go/util/jsonpath"
|
||||
"k8s.io/kubernetes/federation/apis/federation"
|
||||
"k8s.io/kubernetes/pkg/api"
|
||||
"k8s.io/kubernetes/pkg/api/events"
|
||||
@ -52,18 +47,6 @@ import (
|
||||
"k8s.io/kubernetes/pkg/apis/storage"
|
||||
storageutil "k8s.io/kubernetes/pkg/apis/storage/util"
|
||||
"k8s.io/kubernetes/pkg/util/node"
|
||||
|
||||
"github.com/ghodss/yaml"
|
||||
"github.com/golang/glog"
|
||||
)
|
||||
|
||||
const (
|
||||
tabwriterMinWidth = 10
|
||||
tabwriterWidth = 4
|
||||
tabwriterPadding = 3
|
||||
tabwriterPadChar = ' '
|
||||
tabwriterFlags = 0
|
||||
loadBalancerWidth = 16
|
||||
)
|
||||
|
||||
// GetPrinter takes a format type, an optional format argument. It will return true
|
||||
@ -156,339 +139,6 @@ func GetPrinter(format, formatArgument string, noHeaders, allowMissingTemplateKe
|
||||
return printer, true, nil
|
||||
}
|
||||
|
||||
// ResourcePrinter is an interface that knows how to print runtime objects.
|
||||
type ResourcePrinter interface {
|
||||
// Print receives a runtime object, formats it and prints it to a writer.
|
||||
PrintObj(runtime.Object, io.Writer) error
|
||||
HandledResources() []string
|
||||
//Can be used to print out warning/clarifications if needed
|
||||
//after all objects were printed
|
||||
AfterPrint(io.Writer, string) error
|
||||
}
|
||||
|
||||
// ResourcePrinterFunc is a function that can print objects
|
||||
type ResourcePrinterFunc func(runtime.Object, io.Writer) error
|
||||
|
||||
// PrintObj implements ResourcePrinter
|
||||
func (fn ResourcePrinterFunc) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
return fn(obj, w)
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (fn ResourcePrinterFunc) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
func (fn ResourcePrinterFunc) AfterPrint(io.Writer, string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// VersionedPrinter takes runtime objects and ensures they are converted to a given API version
|
||||
// prior to being passed to a nested printer.
|
||||
type VersionedPrinter struct {
|
||||
printer ResourcePrinter
|
||||
converter runtime.ObjectConvertor
|
||||
versions []schema.GroupVersion
|
||||
}
|
||||
|
||||
// NewVersionedPrinter wraps a printer to convert objects to a known API version prior to printing.
|
||||
func NewVersionedPrinter(printer ResourcePrinter, converter runtime.ObjectConvertor, versions ...schema.GroupVersion) ResourcePrinter {
|
||||
return &VersionedPrinter{
|
||||
printer: printer,
|
||||
converter: converter,
|
||||
versions: versions,
|
||||
}
|
||||
}
|
||||
|
||||
func (p *VersionedPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj implements ResourcePrinter
|
||||
func (p *VersionedPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
if len(p.versions) == 0 {
|
||||
return fmt.Errorf("no version specified, object cannot be converted")
|
||||
}
|
||||
converted, err := p.converter.ConvertToVersion(obj, schema.GroupVersions(p.versions))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return p.printer.PrintObj(converted, w)
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *VersionedPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// NamePrinter is an implementation of ResourcePrinter which outputs "resource/name" pair of an object.
|
||||
type NamePrinter struct {
|
||||
Decoder runtime.Decoder
|
||||
Typer runtime.ObjectTyper
|
||||
}
|
||||
|
||||
func (p *NamePrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj is an implementation of ResourcePrinter.PrintObj which decodes the object
|
||||
// and print "resource/name" pair. If the object is a List, print all items in it.
|
||||
func (p *NamePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
if meta.IsListType(obj) {
|
||||
items, err := meta.ExtractList(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if errs := runtime.DecodeList(items, p.Decoder, unstructured.UnstructuredJSONScheme); len(errs) > 0 {
|
||||
return utilerrors.NewAggregate(errs)
|
||||
}
|
||||
for _, obj := range items {
|
||||
if err := p.PrintObj(obj, w); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
name := "<unknown>"
|
||||
if acc, err := meta.Accessor(obj); err == nil {
|
||||
if n := acc.GetName(); len(n) > 0 {
|
||||
name = n
|
||||
}
|
||||
}
|
||||
|
||||
if kind := obj.GetObjectKind().GroupVersionKind(); len(kind.Kind) == 0 {
|
||||
// this is the old code. It's unnecessary on decoded external objects, but on internal objects
|
||||
// you may have to do it. Tests are definitely calling it with internals and I'm not sure who else
|
||||
// is
|
||||
if gvks, _, err := p.Typer.ObjectKinds(obj); err == nil {
|
||||
// TODO: this is wrong, it assumes that meta knows about all Kinds - should take a RESTMapper
|
||||
_, resource := meta.KindToResource(gvks[0])
|
||||
fmt.Fprintf(w, "%s/%s\n", resource.Resource, name)
|
||||
} else {
|
||||
fmt.Fprintf(w, "<unknown>/%s\n", name)
|
||||
}
|
||||
|
||||
} else {
|
||||
// TODO: this is wrong, it assumes that meta knows about all Kinds - should take a RESTMapper
|
||||
_, resource := meta.KindToResource(kind)
|
||||
fmt.Fprintf(w, "%s/%s\n", resource.Resource, name)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *NamePrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// JSONPrinter is an implementation of ResourcePrinter which outputs an object as JSON.
|
||||
type JSONPrinter struct {
|
||||
}
|
||||
|
||||
func (p *JSONPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj is an implementation of ResourcePrinter.PrintObj which simply writes the object to the Writer.
|
||||
func (p *JSONPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
switch obj := obj.(type) {
|
||||
case *runtime.Unknown:
|
||||
var buf bytes.Buffer
|
||||
err := json.Indent(&buf, obj.Raw, "", " ")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
buf.WriteRune('\n')
|
||||
_, err = buf.WriteTo(w)
|
||||
return err
|
||||
}
|
||||
|
||||
data, err := json.MarshalIndent(obj, "", " ")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
data = append(data, '\n')
|
||||
_, err = w.Write(data)
|
||||
return err
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *JSONPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// YAMLPrinter is an implementation of ResourcePrinter which outputs an object as YAML.
|
||||
// The input object is assumed to be in the internal version of an API and is converted
|
||||
// to the given version first.
|
||||
type YAMLPrinter struct {
|
||||
version string
|
||||
converter runtime.ObjectConvertor
|
||||
}
|
||||
|
||||
func (p *YAMLPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj prints the data as YAML.
|
||||
func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
switch obj := obj.(type) {
|
||||
case *runtime.Unknown:
|
||||
data, err := yaml.JSONToYAML(obj.Raw)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = w.Write(data)
|
||||
return err
|
||||
}
|
||||
|
||||
output, err := yaml.Marshal(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = fmt.Fprint(w, string(output))
|
||||
return err
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *YAMLPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
type handlerEntry struct {
|
||||
columns []string
|
||||
columnsWithWide []string
|
||||
printFunc reflect.Value
|
||||
args []reflect.Value
|
||||
}
|
||||
|
||||
type PrintOptions struct {
|
||||
NoHeaders bool
|
||||
WithNamespace bool
|
||||
WithKind bool
|
||||
Wide bool
|
||||
ShowAll bool
|
||||
ShowLabels bool
|
||||
AbsoluteTimestamps bool
|
||||
Kind string
|
||||
ColumnLabels []string
|
||||
}
|
||||
|
||||
// HumanReadablePrinter is an implementation of ResourcePrinter which attempts to provide
|
||||
// more elegant output. It is not threadsafe, but you may call PrintObj repeatedly; headers
|
||||
// will only be printed if the object type changes. This makes it useful for printing items
|
||||
// received from watches.
|
||||
type HumanReadablePrinter struct {
|
||||
handlerMap map[reflect.Type]*handlerEntry
|
||||
options PrintOptions
|
||||
lastType reflect.Type
|
||||
hiddenObjNum int
|
||||
}
|
||||
|
||||
// NewHumanReadablePrinter creates a HumanReadablePrinter.
|
||||
func NewHumanReadablePrinter(options PrintOptions) *HumanReadablePrinter {
|
||||
printer := &HumanReadablePrinter{
|
||||
handlerMap: make(map[reflect.Type]*handlerEntry),
|
||||
options: options,
|
||||
}
|
||||
printer.addDefaultHandlers()
|
||||
return printer
|
||||
}
|
||||
|
||||
// formatResourceName receives a resource kind, name, and boolean specifying
|
||||
// whether or not to update the current name to "kind/name"
|
||||
func formatResourceName(kind, name string, withKind bool) string {
|
||||
if !withKind || kind == "" {
|
||||
return name
|
||||
}
|
||||
|
||||
return kind + "/" + name
|
||||
}
|
||||
|
||||
// GetResourceKind returns the type currently set for a resource
|
||||
func (h *HumanReadablePrinter) GetResourceKind() string {
|
||||
return h.options.Kind
|
||||
}
|
||||
|
||||
// EnsurePrintWithKind sets HumanReadablePrinter options "WithKind" to true
|
||||
// and "Kind" to the string arg it receives, pre-pending this string
|
||||
// to the "NAME" column in an output of resources.
|
||||
func (h *HumanReadablePrinter) EnsurePrintWithKind(kind string) {
|
||||
h.options.WithKind = true
|
||||
h.options.Kind = kind
|
||||
}
|
||||
|
||||
// EnsurePrintHeaders sets the HumanReadablePrinter option "NoHeaders" to false
|
||||
// and removes the .lastType that was printed, which forces headers to be
|
||||
// printed in cases where multiple lists of the same resource are printed
|
||||
// consecutively, but are separated by non-printer related information.
|
||||
func (h *HumanReadablePrinter) EnsurePrintHeaders() {
|
||||
h.options.NoHeaders = false
|
||||
h.lastType = nil
|
||||
}
|
||||
|
||||
// Handler adds a print handler with a given set of columns to HumanReadablePrinter instance.
|
||||
// See validatePrintHandlerFunc for required method signature.
|
||||
func (h *HumanReadablePrinter) Handler(columns, columnsWithWide []string, printFunc interface{}) error {
|
||||
printFuncValue := reflect.ValueOf(printFunc)
|
||||
if err := h.validatePrintHandlerFunc(printFuncValue); err != nil {
|
||||
glog.Errorf("Unable to add print handler: %v", err)
|
||||
return err
|
||||
}
|
||||
|
||||
objType := printFuncValue.Type().In(0)
|
||||
h.handlerMap[objType] = &handlerEntry{
|
||||
columns: columns,
|
||||
columnsWithWide: columnsWithWide,
|
||||
printFunc: printFuncValue,
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// validatePrintHandlerFunc validates print handler signature.
|
||||
// printFunc is the function that will be called to print an object.
|
||||
// It must be of the following type:
|
||||
// func printFunc(object ObjectType, w io.Writer, options PrintOptions) error
|
||||
// where ObjectType is the type of the object that will be printed.
|
||||
func (h *HumanReadablePrinter) validatePrintHandlerFunc(printFunc reflect.Value) error {
|
||||
if printFunc.Kind() != reflect.Func {
|
||||
return fmt.Errorf("invalid print handler. %#v is not a function", printFunc)
|
||||
}
|
||||
funcType := printFunc.Type()
|
||||
if funcType.NumIn() != 3 || funcType.NumOut() != 1 {
|
||||
return fmt.Errorf("invalid print handler." +
|
||||
"Must accept 3 parameters and return 1 value.")
|
||||
}
|
||||
if funcType.In(1) != reflect.TypeOf((*io.Writer)(nil)).Elem() ||
|
||||
funcType.In(2) != reflect.TypeOf((*PrintOptions)(nil)).Elem() ||
|
||||
funcType.Out(0) != reflect.TypeOf((*error)(nil)).Elem() {
|
||||
return fmt.Errorf("invalid print handler. The expected signature is: "+
|
||||
"func handler(obj %v, w io.Writer, options PrintOptions) error", funcType.In(0))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) HandledResources() []string {
|
||||
keys := make([]string, 0)
|
||||
|
||||
for k := range h.handlerMap {
|
||||
// k.String looks like "*api.PodList" and we want just "pod"
|
||||
api := strings.Split(k.String(), ".")
|
||||
resource := api[len(api)-1]
|
||||
if strings.HasSuffix(resource, "List") {
|
||||
continue
|
||||
}
|
||||
resource = strings.ToLower(resource)
|
||||
keys = append(keys, resource)
|
||||
}
|
||||
return keys
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) AfterPrint(output io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// NOTE: When adding a new resource type here, please update the list
|
||||
// pkg/kubectl/cmd/get.go to reflect the new resource type.
|
||||
var (
|
||||
@ -544,7 +194,7 @@ var (
|
||||
certificateSigningRequestColumns = []string{"NAME", "AGE", "REQUESTOR", "CONDITION"}
|
||||
)
|
||||
|
||||
func (h *HumanReadablePrinter) printPod(pod *api.Pod, w io.Writer, options PrintOptions) error {
|
||||
func printPod(pod *api.Pod, w io.Writer, options PrintOptions) error {
|
||||
if err := printPodBase(pod, w, options); err != nil {
|
||||
return err
|
||||
}
|
||||
@ -552,7 +202,7 @@ func (h *HumanReadablePrinter) printPod(pod *api.Pod, w io.Writer, options Print
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) printPodList(podList *api.PodList, w io.Writer, options PrintOptions) error {
|
||||
func printPodList(podList *api.PodList, w io.Writer, options PrintOptions) error {
|
||||
for _, pod := range podList.Items {
|
||||
if err := printPodBase(&pod, w, options); err != nil {
|
||||
return err
|
||||
@ -638,18 +288,6 @@ func (h *HumanReadablePrinter) addDefaultHandlers() {
|
||||
h.Handler(statusColumns, nil, printStatus)
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) unknown(data []byte, w io.Writer) error {
|
||||
_, err := fmt.Fprintf(w, "Unknown object: %s", string(data))
|
||||
return err
|
||||
}
|
||||
|
||||
func (h *HumanReadablePrinter) printHeader(columnNames []string, w io.Writer) error {
|
||||
if _, err := fmt.Fprintf(w, "%s\n", strings.Join(columnNames, "\t")); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Pass ports=nil for all ports.
|
||||
func formatEndpoints(endpoints *api.Endpoints, ports sets.String) string {
|
||||
if len(endpoints.Subsets) == 0 {
|
||||
@ -2449,11 +2087,6 @@ func formatShowLabelsHeader(showLabels bool, t reflect.Type) []string {
|
||||
return nil
|
||||
}
|
||||
|
||||
// GetNewTabWriter returns a tabwriter that translates tabbed columns in input into properly aligned text.
|
||||
func GetNewTabWriter(output io.Writer) *tabwriter.Writer {
|
||||
return tabwriter.NewWriter(output, tabwriterMinWidth, tabwriterWidth, tabwriterPadding, tabwriterPadChar, tabwriterFlags)
|
||||
}
|
||||
|
||||
// PrintObj prints the obj in a human-friendly format according to the type of the obj.
|
||||
func (h *HumanReadablePrinter) PrintObj(obj runtime.Object, output io.Writer) error {
|
||||
// if output is a tabwriter (when it's called by kubectl get), we use it; create a new tabwriter otherwise
|
||||
@ -2563,90 +2196,6 @@ func printUnstructured(unstructured runtime.Unstructured, w io.Writer, options P
|
||||
return nil
|
||||
}
|
||||
|
||||
// TemplatePrinter is an implementation of ResourcePrinter which formats data with a Go Template.
|
||||
type TemplatePrinter struct {
|
||||
rawTemplate string
|
||||
template *template.Template
|
||||
}
|
||||
|
||||
func NewTemplatePrinter(tmpl []byte) (*TemplatePrinter, error) {
|
||||
t, err := template.New("output").
|
||||
Funcs(template.FuncMap{"exists": exists}).
|
||||
Parse(string(tmpl))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &TemplatePrinter{
|
||||
rawTemplate: string(tmpl),
|
||||
template: t,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// AllowMissingKeys tells the template engine if missing keys are allowed.
|
||||
func (p *TemplatePrinter) AllowMissingKeys(allow bool) {
|
||||
if allow {
|
||||
p.template.Option("missingkey=default")
|
||||
} else {
|
||||
p.template.Option("missingkey=error")
|
||||
}
|
||||
}
|
||||
|
||||
func (p *TemplatePrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj formats the obj with the Go Template.
|
||||
func (p *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
var data []byte
|
||||
var err error
|
||||
data, err = json.Marshal(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
out := map[string]interface{}{}
|
||||
if err := json.Unmarshal(data, &out); err != nil {
|
||||
return err
|
||||
}
|
||||
if err = p.safeExecute(w, out); err != nil {
|
||||
// It is way easier to debug this stuff when it shows up in
|
||||
// stdout instead of just stdin. So in addition to returning
|
||||
// a nice error, also print useful stuff with the writer.
|
||||
fmt.Fprintf(w, "Error executing template: %v. Printing more information for debugging the template:\n", err)
|
||||
fmt.Fprintf(w, "\ttemplate was:\n\t\t%v\n", p.rawTemplate)
|
||||
fmt.Fprintf(w, "\traw data was:\n\t\t%v\n", string(data))
|
||||
fmt.Fprintf(w, "\tobject given to template engine was:\n\t\t%+v\n\n", out)
|
||||
return fmt.Errorf("error executing template %q: %v", p.rawTemplate, err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *TemplatePrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// safeExecute tries to execute the template, but catches panics and returns an error
|
||||
// should the template engine panic.
|
||||
func (p *TemplatePrinter) safeExecute(w io.Writer, obj interface{}) error {
|
||||
var panicErr error
|
||||
// Sorry for the double anonymous function. There's probably a clever way
|
||||
// to do this that has the defer'd func setting the value to be returned, but
|
||||
// that would be even less obvious.
|
||||
retErr := func() error {
|
||||
defer func() {
|
||||
if x := recover(); x != nil {
|
||||
panicErr = fmt.Errorf("caught panic: %+v", x)
|
||||
}
|
||||
}()
|
||||
return p.template.Execute(w, obj)
|
||||
}()
|
||||
if panicErr != nil {
|
||||
return panicErr
|
||||
}
|
||||
return retErr
|
||||
}
|
||||
|
||||
func tabbedString(f func(io.Writer) error) (string, error) {
|
||||
out := new(tabwriter.Writer)
|
||||
buf := &bytes.Buffer{}
|
||||
@ -2662,135 +2211,6 @@ func tabbedString(f func(io.Writer) error) (string, error) {
|
||||
return str, nil
|
||||
}
|
||||
|
||||
// exists returns true if it would be possible to call the index function
|
||||
// with these arguments.
|
||||
//
|
||||
// TODO: how to document this for users?
|
||||
//
|
||||
// index returns the result of indexing its first argument by the following
|
||||
// arguments. Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each
|
||||
// indexed item must be a map, slice, or array.
|
||||
func exists(item interface{}, indices ...interface{}) bool {
|
||||
v := reflect.ValueOf(item)
|
||||
for _, i := range indices {
|
||||
index := reflect.ValueOf(i)
|
||||
var isNil bool
|
||||
if v, isNil = indirect(v); isNil {
|
||||
return false
|
||||
}
|
||||
switch v.Kind() {
|
||||
case reflect.Array, reflect.Slice, reflect.String:
|
||||
var x int64
|
||||
switch index.Kind() {
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
x = index.Int()
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
||||
x = int64(index.Uint())
|
||||
default:
|
||||
return false
|
||||
}
|
||||
if x < 0 || x >= int64(v.Len()) {
|
||||
return false
|
||||
}
|
||||
v = v.Index(int(x))
|
||||
case reflect.Map:
|
||||
if !index.IsValid() {
|
||||
index = reflect.Zero(v.Type().Key())
|
||||
}
|
||||
if !index.Type().AssignableTo(v.Type().Key()) {
|
||||
return false
|
||||
}
|
||||
if x := v.MapIndex(index); x.IsValid() {
|
||||
v = x
|
||||
} else {
|
||||
v = reflect.Zero(v.Type().Elem())
|
||||
}
|
||||
default:
|
||||
return false
|
||||
}
|
||||
}
|
||||
if _, isNil := indirect(v); isNil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// stolen from text/template
|
||||
// indirect returns the item at the end of indirection, and a bool to indicate if it's nil.
|
||||
// We indirect through pointers and empty interfaces (only) because
|
||||
// non-empty interfaces have methods we might need.
|
||||
func indirect(v reflect.Value) (rv reflect.Value, isNil bool) {
|
||||
for ; v.Kind() == reflect.Ptr || v.Kind() == reflect.Interface; v = v.Elem() {
|
||||
if v.IsNil() {
|
||||
return v, true
|
||||
}
|
||||
if v.Kind() == reflect.Interface && v.NumMethod() > 0 {
|
||||
break
|
||||
}
|
||||
}
|
||||
return v, false
|
||||
}
|
||||
|
||||
// JSONPathPrinter is an implementation of ResourcePrinter which formats data with jsonpath expression.
|
||||
type JSONPathPrinter struct {
|
||||
rawTemplate string
|
||||
*jsonpath.JSONPath
|
||||
}
|
||||
|
||||
func NewJSONPathPrinter(tmpl string) (*JSONPathPrinter, error) {
|
||||
j := jsonpath.New("out")
|
||||
if err := j.Parse(tmpl); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &JSONPathPrinter{tmpl, j}, nil
|
||||
}
|
||||
|
||||
func (j *JSONPathPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj formats the obj with the JSONPath Template.
|
||||
func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
var queryObj interface{} = obj
|
||||
if meta.IsListType(obj) {
|
||||
data, err := json.Marshal(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
queryObj = map[string]interface{}{}
|
||||
if err := json.Unmarshal(data, &queryObj); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
if unknown, ok := obj.(*runtime.Unknown); ok {
|
||||
data, err := json.Marshal(unknown)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
queryObj = map[string]interface{}{}
|
||||
if err := json.Unmarshal(data, &queryObj); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
if unstructured, ok := obj.(*unstructured.Unstructured); ok {
|
||||
queryObj = unstructured.Object
|
||||
}
|
||||
|
||||
if err := j.JSONPath.Execute(w, queryObj); err != nil {
|
||||
fmt.Fprintf(w, "Error executing template: %v. Printing more information for debugging the template:\n", err)
|
||||
fmt.Fprintf(w, "\ttemplate was:\n\t\t%v\n", j.rawTemplate)
|
||||
fmt.Fprintf(w, "\tobject given to jsonpath engine was:\n\t\t%#v\n\n", queryObj)
|
||||
return fmt.Errorf("error executing jsonpath %q: %v\n", j.rawTemplate, err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *JSONPathPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// formatEventSource formats EventSource as a comma separated string excluding Host when empty
|
||||
func formatEventSource(es api.EventSource) string {
|
||||
EventSourceString := []string{es.Component}
|
||||
@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package kubectl
|
||||
package internalversion
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
101
pkg/printers/json.go
Normal file
101
pkg/printers/json.go
Normal file
@ -0,0 +1,101 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
|
||||
"github.com/ghodss/yaml"
|
||||
)
|
||||
|
||||
// JSONPrinter is an implementation of ResourcePrinter which outputs an object as JSON.
|
||||
type JSONPrinter struct {
|
||||
}
|
||||
|
||||
func (p *JSONPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj is an implementation of ResourcePrinter.PrintObj which simply writes the object to the Writer.
|
||||
func (p *JSONPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
switch obj := obj.(type) {
|
||||
case *runtime.Unknown:
|
||||
var buf bytes.Buffer
|
||||
err := json.Indent(&buf, obj.Raw, "", " ")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
buf.WriteRune('\n')
|
||||
_, err = buf.WriteTo(w)
|
||||
return err
|
||||
}
|
||||
|
||||
data, err := json.MarshalIndent(obj, "", " ")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
data = append(data, '\n')
|
||||
_, err = w.Write(data)
|
||||
return err
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *JSONPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// YAMLPrinter is an implementation of ResourcePrinter which outputs an object as YAML.
|
||||
// The input object is assumed to be in the internal version of an API and is converted
|
||||
// to the given version first.
|
||||
type YAMLPrinter struct {
|
||||
version string
|
||||
converter runtime.ObjectConvertor
|
||||
}
|
||||
|
||||
func (p *YAMLPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj prints the data as YAML.
|
||||
func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
switch obj := obj.(type) {
|
||||
case *runtime.Unknown:
|
||||
data, err := yaml.JSONToYAML(obj.Raw)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = w.Write(data)
|
||||
return err
|
||||
}
|
||||
|
||||
output, err := yaml.Marshal(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = fmt.Fprint(w, string(output))
|
||||
return err
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *YAMLPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
157
pkg/printers/jsonpath.go
Normal file
157
pkg/printers/jsonpath.go
Normal file
@ -0,0 +1,157 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"reflect"
|
||||
|
||||
"k8s.io/apimachinery/pkg/api/meta"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
"k8s.io/client-go/util/jsonpath"
|
||||
)
|
||||
|
||||
// exists returns true if it would be possible to call the index function
|
||||
// with these arguments.
|
||||
//
|
||||
// TODO: how to document this for users?
|
||||
//
|
||||
// index returns the result of indexing its first argument by the following
|
||||
// arguments. Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each
|
||||
// indexed item must be a map, slice, or array.
|
||||
func exists(item interface{}, indices ...interface{}) bool {
|
||||
v := reflect.ValueOf(item)
|
||||
for _, i := range indices {
|
||||
index := reflect.ValueOf(i)
|
||||
var isNil bool
|
||||
if v, isNil = indirect(v); isNil {
|
||||
return false
|
||||
}
|
||||
switch v.Kind() {
|
||||
case reflect.Array, reflect.Slice, reflect.String:
|
||||
var x int64
|
||||
switch index.Kind() {
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
x = index.Int()
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
||||
x = int64(index.Uint())
|
||||
default:
|
||||
return false
|
||||
}
|
||||
if x < 0 || x >= int64(v.Len()) {
|
||||
return false
|
||||
}
|
||||
v = v.Index(int(x))
|
||||
case reflect.Map:
|
||||
if !index.IsValid() {
|
||||
index = reflect.Zero(v.Type().Key())
|
||||
}
|
||||
if !index.Type().AssignableTo(v.Type().Key()) {
|
||||
return false
|
||||
}
|
||||
if x := v.MapIndex(index); x.IsValid() {
|
||||
v = x
|
||||
} else {
|
||||
v = reflect.Zero(v.Type().Elem())
|
||||
}
|
||||
default:
|
||||
return false
|
||||
}
|
||||
}
|
||||
if _, isNil := indirect(v); isNil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// stolen from text/template
|
||||
// indirect returns the item at the end of indirection, and a bool to indicate if it's nil.
|
||||
// We indirect through pointers and empty interfaces (only) because
|
||||
// non-empty interfaces have methods we might need.
|
||||
func indirect(v reflect.Value) (rv reflect.Value, isNil bool) {
|
||||
for ; v.Kind() == reflect.Ptr || v.Kind() == reflect.Interface; v = v.Elem() {
|
||||
if v.IsNil() {
|
||||
return v, true
|
||||
}
|
||||
if v.Kind() == reflect.Interface && v.NumMethod() > 0 {
|
||||
break
|
||||
}
|
||||
}
|
||||
return v, false
|
||||
}
|
||||
|
||||
// JSONPathPrinter is an implementation of ResourcePrinter which formats data with jsonpath expression.
|
||||
type JSONPathPrinter struct {
|
||||
rawTemplate string
|
||||
*jsonpath.JSONPath
|
||||
}
|
||||
|
||||
func NewJSONPathPrinter(tmpl string) (*JSONPathPrinter, error) {
|
||||
j := jsonpath.New("out")
|
||||
if err := j.Parse(tmpl); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &JSONPathPrinter{tmpl, j}, nil
|
||||
}
|
||||
|
||||
func (j *JSONPathPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj formats the obj with the JSONPath Template.
|
||||
func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
var queryObj interface{} = obj
|
||||
if meta.IsListType(obj) {
|
||||
data, err := json.Marshal(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
queryObj = map[string]interface{}{}
|
||||
if err := json.Unmarshal(data, &queryObj); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
if unknown, ok := obj.(*runtime.Unknown); ok {
|
||||
data, err := json.Marshal(unknown)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
queryObj = map[string]interface{}{}
|
||||
if err := json.Unmarshal(data, &queryObj); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
if unstructured, ok := obj.(runtime.Unstructured); ok {
|
||||
queryObj = unstructured.UnstructuredContent()
|
||||
}
|
||||
|
||||
if err := j.JSONPath.Execute(w, queryObj); err != nil {
|
||||
fmt.Fprintf(w, "Error executing template: %v. Printing more information for debugging the template:\n", err)
|
||||
fmt.Fprintf(w, "\ttemplate was:\n\t\t%v\n", j.rawTemplate)
|
||||
fmt.Fprintf(w, "\tobject given to jsonpath engine was:\n\t\t%#v\n\n", queryObj)
|
||||
return fmt.Errorf("error executing jsonpath %q: %v\n", j.rawTemplate, err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *JSONPathPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
89
pkg/printers/name.go
Normal file
89
pkg/printers/name.go
Normal file
@ -0,0 +1,89 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
|
||||
"k8s.io/apimachinery/pkg/api/meta"
|
||||
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
utilerrors "k8s.io/apimachinery/pkg/util/errors"
|
||||
)
|
||||
|
||||
// NamePrinter is an implementation of ResourcePrinter which outputs "resource/name" pair of an object.
|
||||
type NamePrinter struct {
|
||||
Decoder runtime.Decoder
|
||||
Typer runtime.ObjectTyper
|
||||
}
|
||||
|
||||
func (p *NamePrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj is an implementation of ResourcePrinter.PrintObj which decodes the object
|
||||
// and print "resource/name" pair. If the object is a List, print all items in it.
|
||||
func (p *NamePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
if meta.IsListType(obj) {
|
||||
items, err := meta.ExtractList(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if errs := runtime.DecodeList(items, p.Decoder, unstructured.UnstructuredJSONScheme); len(errs) > 0 {
|
||||
return utilerrors.NewAggregate(errs)
|
||||
}
|
||||
for _, obj := range items {
|
||||
if err := p.PrintObj(obj, w); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
name := "<unknown>"
|
||||
if acc, err := meta.Accessor(obj); err == nil {
|
||||
if n := acc.GetName(); len(n) > 0 {
|
||||
name = n
|
||||
}
|
||||
}
|
||||
|
||||
if kind := obj.GetObjectKind().GroupVersionKind(); len(kind.Kind) == 0 {
|
||||
// this is the old code. It's unnecessary on decoded external objects, but on internal objects
|
||||
// you may have to do it. Tests are definitely calling it with internals and I'm not sure who else
|
||||
// is
|
||||
if gvks, _, err := p.Typer.ObjectKinds(obj); err == nil {
|
||||
// TODO: this is wrong, it assumes that meta knows about all Kinds - should take a RESTMapper
|
||||
_, resource := meta.KindToResource(gvks[0])
|
||||
fmt.Fprintf(w, "%s/%s\n", resource.Resource, name)
|
||||
} else {
|
||||
fmt.Fprintf(w, "<unknown>/%s\n", name)
|
||||
}
|
||||
|
||||
} else {
|
||||
// TODO: this is wrong, it assumes that meta knows about all Kinds - should take a RESTMapper
|
||||
_, resource := meta.KindToResource(kind)
|
||||
fmt.Fprintf(w, "%s/%s\n", resource.Resource, name)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *NamePrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
116
pkg/printers/printers.go
Normal file
116
pkg/printers/printers.go
Normal file
@ -0,0 +1,116 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io/ioutil"
|
||||
"os"
|
||||
|
||||
"k8s.io/apimachinery/pkg/api/meta"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
)
|
||||
|
||||
// GetStandardPrinter takes a format type, an optional format argument. It will return true
|
||||
// if the format is generic (untyped), otherwise it will return false. The printer
|
||||
// is agnostic to schema versions, so you must send arguments to PrintObj in the
|
||||
// version you wish them to be shown using a VersionedPrinter (typically when
|
||||
// generic is true).
|
||||
func GetStandardPrinter(format, formatArgument string, noHeaders, allowMissingTemplateKeys bool, mapper meta.RESTMapper, typer runtime.ObjectTyper, decoders []runtime.Decoder) (ResourcePrinter, bool, error) {
|
||||
var printer ResourcePrinter
|
||||
switch format {
|
||||
case "json":
|
||||
printer = &JSONPrinter{}
|
||||
case "yaml":
|
||||
printer = &YAMLPrinter{}
|
||||
case "name":
|
||||
printer = &NamePrinter{
|
||||
Typer: typer,
|
||||
Decoders: decoders,
|
||||
Mapper: mapper,
|
||||
}
|
||||
case "template", "go-template":
|
||||
if len(formatArgument) == 0 {
|
||||
return nil, false, fmt.Errorf("template format specified but no template given")
|
||||
}
|
||||
templatePrinter, err := NewTemplatePrinter([]byte(formatArgument))
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error parsing template %s, %v\n", formatArgument, err)
|
||||
}
|
||||
templatePrinter.AllowMissingKeys(allowMissingTemplateKeys)
|
||||
printer = templatePrinter
|
||||
case "templatefile", "go-template-file":
|
||||
if len(formatArgument) == 0 {
|
||||
return nil, false, fmt.Errorf("templatefile format specified but no template file given")
|
||||
}
|
||||
data, err := ioutil.ReadFile(formatArgument)
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error reading template %s, %v\n", formatArgument, err)
|
||||
}
|
||||
templatePrinter, err := NewTemplatePrinter(data)
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error parsing template %s, %v\n", string(data), err)
|
||||
}
|
||||
templatePrinter.AllowMissingKeys(allowMissingTemplateKeys)
|
||||
printer = templatePrinter
|
||||
case "jsonpath":
|
||||
if len(formatArgument) == 0 {
|
||||
return nil, false, fmt.Errorf("jsonpath template format specified but no template given")
|
||||
}
|
||||
jsonpathPrinter, err := NewJSONPathPrinter(formatArgument)
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error parsing jsonpath %s, %v\n", formatArgument, err)
|
||||
}
|
||||
jsonpathPrinter.AllowMissingKeys(allowMissingTemplateKeys)
|
||||
printer = jsonpathPrinter
|
||||
case "jsonpath-file":
|
||||
if len(formatArgument) == 0 {
|
||||
return nil, false, fmt.Errorf("jsonpath file format specified but no template file file given")
|
||||
}
|
||||
data, err := ioutil.ReadFile(formatArgument)
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error reading template %s, %v\n", formatArgument, err)
|
||||
}
|
||||
jsonpathPrinter, err := NewJSONPathPrinter(string(data))
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error parsing template %s, %v\n", string(data), err)
|
||||
}
|
||||
jsonpathPrinter.AllowMissingKeys(allowMissingTemplateKeys)
|
||||
printer = jsonpathPrinter
|
||||
case "custom-columns":
|
||||
var err error
|
||||
if printer, err = NewCustomColumnsPrinterFromSpec(formatArgument, decoders[0], noHeaders); err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
case "custom-columns-file":
|
||||
file, err := os.Open(formatArgument)
|
||||
if err != nil {
|
||||
return nil, false, fmt.Errorf("error reading template %s, %v\n", formatArgument, err)
|
||||
}
|
||||
defer file.Close()
|
||||
if printer, err = NewCustomColumnsPrinterFromTemplate(file, decoders[0]); err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
case "wide":
|
||||
fallthrough
|
||||
case "":
|
||||
return nil, false, nil
|
||||
default:
|
||||
return nil, false, fmt.Errorf("output format %q not recognized", format)
|
||||
}
|
||||
return printer, true, nil
|
||||
}
|
||||
36
pkg/printers/tabwriter.go
Normal file
36
pkg/printers/tabwriter.go
Normal file
@ -0,0 +1,36 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"io"
|
||||
"text/tabwriter"
|
||||
)
|
||||
|
||||
const (
|
||||
tabwriterMinWidth = 10
|
||||
tabwriterWidth = 4
|
||||
tabwriterPadding = 3
|
||||
tabwriterPadChar = ' '
|
||||
tabwriterFlags = 0
|
||||
loadBalancerWidth = 16
|
||||
)
|
||||
|
||||
// GetNewTabWriter returns a tabwriter that translates tabbed columns in input into properly aligned text.
|
||||
func GetNewTabWriter(output io.Writer) *tabwriter.Writer {
|
||||
return tabwriter.NewWriter(output, tabwriterMinWidth, tabwriterWidth, tabwriterPadding, tabwriterPadChar, tabwriterFlags)
|
||||
}
|
||||
110
pkg/printers/template.go
Normal file
110
pkg/printers/template.go
Normal file
@ -0,0 +1,110 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"text/template"
|
||||
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
)
|
||||
|
||||
// TemplatePrinter is an implementation of ResourcePrinter which formats data with a Go Template.
|
||||
type TemplatePrinter struct {
|
||||
rawTemplate string
|
||||
template *template.Template
|
||||
}
|
||||
|
||||
func NewTemplatePrinter(tmpl []byte) (*TemplatePrinter, error) {
|
||||
t, err := template.New("output").
|
||||
Funcs(template.FuncMap{"exists": exists}).
|
||||
Parse(string(tmpl))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &TemplatePrinter{
|
||||
rawTemplate: string(tmpl),
|
||||
template: t,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// AllowMissingKeys tells the template engine if missing keys are allowed.
|
||||
func (p *TemplatePrinter) AllowMissingKeys(allow bool) {
|
||||
if allow {
|
||||
p.template.Option("missingkey=default")
|
||||
} else {
|
||||
p.template.Option("missingkey=error")
|
||||
}
|
||||
}
|
||||
|
||||
func (p *TemplatePrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj formats the obj with the Go Template.
|
||||
func (p *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
var data []byte
|
||||
var err error
|
||||
data, err = json.Marshal(obj)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
out := map[string]interface{}{}
|
||||
if err := json.Unmarshal(data, &out); err != nil {
|
||||
return err
|
||||
}
|
||||
if err = p.safeExecute(w, out); err != nil {
|
||||
// It is way easier to debug this stuff when it shows up in
|
||||
// stdout instead of just stdin. So in addition to returning
|
||||
// a nice error, also print useful stuff with the writer.
|
||||
fmt.Fprintf(w, "Error executing template: %v. Printing more information for debugging the template:\n", err)
|
||||
fmt.Fprintf(w, "\ttemplate was:\n\t\t%v\n", p.rawTemplate)
|
||||
fmt.Fprintf(w, "\traw data was:\n\t\t%v\n", string(data))
|
||||
fmt.Fprintf(w, "\tobject given to template engine was:\n\t\t%+v\n\n", out)
|
||||
return fmt.Errorf("error executing template %q: %v", p.rawTemplate, err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *TemplatePrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// safeExecute tries to execute the template, but catches panics and returns an error
|
||||
// should the template engine panic.
|
||||
func (p *TemplatePrinter) safeExecute(w io.Writer, obj interface{}) error {
|
||||
var panicErr error
|
||||
// Sorry for the double anonymous function. There's probably a clever way
|
||||
// to do this that has the defer'd func setting the value to be returned, but
|
||||
// that would be even less obvious.
|
||||
retErr := func() error {
|
||||
defer func() {
|
||||
if x := recover(); x != nil {
|
||||
panicErr = fmt.Errorf("caught panic: %+v", x)
|
||||
}
|
||||
}()
|
||||
return p.template.Execute(w, obj)
|
||||
}()
|
||||
if panicErr != nil {
|
||||
return panicErr
|
||||
}
|
||||
return retErr
|
||||
}
|
||||
63
pkg/printers/versioned.go
Normal file
63
pkg/printers/versioned.go
Normal file
@ -0,0 +1,63 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
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 printers
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
"k8s.io/apimachinery/pkg/runtime/schema"
|
||||
)
|
||||
|
||||
// VersionedPrinter takes runtime objects and ensures they are converted to a given API version
|
||||
// prior to being passed to a nested printer.
|
||||
type VersionedPrinter struct {
|
||||
printer ResourcePrinter
|
||||
converter runtime.ObjectConvertor
|
||||
versions []schema.GroupVersion
|
||||
}
|
||||
|
||||
// NewVersionedPrinter wraps a printer to convert objects to a known API version prior to printing.
|
||||
func NewVersionedPrinter(printer ResourcePrinter, converter runtime.ObjectConvertor, versions ...schema.GroupVersion) ResourcePrinter {
|
||||
return &VersionedPrinter{
|
||||
printer: printer,
|
||||
converter: converter,
|
||||
versions: versions,
|
||||
}
|
||||
}
|
||||
|
||||
func (p *VersionedPrinter) AfterPrint(w io.Writer, res string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
// PrintObj implements ResourcePrinter
|
||||
func (p *VersionedPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
|
||||
if len(p.versions) == 0 {
|
||||
return fmt.Errorf("no version specified, object cannot be converted")
|
||||
}
|
||||
converted, err := p.converter.ConvertToVersion(obj, schema.GroupVersions(p.versions))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return p.printer.PrintObj(converted, w)
|
||||
}
|
||||
|
||||
// TODO: implement HandledResources()
|
||||
func (p *VersionedPrinter) HandledResources() []string {
|
||||
return []string{}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user