add cluster proxy gerneration code (#2042)

vendor/k8s.io/cli-runtime/LICENSE

@@ -0,0 +1,202 @@
+
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vendor/k8s.io/cli-runtime/pkg/printers/discard.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2018 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"
+)
+
+// NewDiscardingPrinter is a printer that discards all objects
+func NewDiscardingPrinter() ResourcePrinterFunc {
+	return ResourcePrinterFunc(func(runtime.Object, io.Writer) error {
+		return nil
+	})
+}

vendor/k8s.io/cli-runtime/pkg/printers/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2019 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 is helper for formatting and printing runtime objects into
+// primitives io.writer.
+package printers // import "k8s.io/cli-runtime/pkg/printers"

vendor/k8s.io/cli-runtime/pkg/printers/interface.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2018 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"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// 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)
+}
+
+// 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
+}
+
+// PrintOptions struct defines a struct for various print options
+type PrintOptions struct {
+	NoHeaders     bool
+	WithNamespace bool
+	WithKind      bool
+	Wide          bool
+	ShowLabels    bool
+	Kind          schema.GroupKind
+	ColumnLabels  []string
+
+	SortBy string
+
+	// indicates if it is OK to ignore missing keys for rendering an output template.
+	AllowMissingKeys bool
+}

vendor/k8s.io/cli-runtime/pkg/printers/json.go

@@ -0,0 +1,142 @@
+/*
+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"
+	"reflect"
+	"sync/atomic"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+
+	"sigs.k8s.io/yaml"
+)
+
+// JSONPrinter is an implementation of ResourcePrinter which outputs an object as JSON.
+type JSONPrinter struct{}
+
+// 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 {
+	// we use reflect.Indirect here in order to obtain the actual value from a pointer.
+	// we need an actual value in order to retrieve the package path for an object.
+	// using reflect.Indirect indiscriminately is valid here, as all runtime.Objects are supposed to be pointers.
+	if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj)).Type().PkgPath()) {
+		return fmt.Errorf(InternalObjectPrinterErr)
+	}
+
+	switch obj := obj.(type) {
+	case *metav1.WatchEvent:
+		if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj.Object.Object)).Type().PkgPath()) {
+			return fmt.Errorf(InternalObjectPrinterErr)
+		}
+		data, err := json.Marshal(obj)
+		if err != nil {
+			return err
+		}
+		_, err = w.Write(data)
+		if err != nil {
+			return err
+		}
+		_, err = w.Write([]byte{'\n'})
+		return err
+	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
+	}
+
+	if obj.GetObjectKind().GroupVersionKind().Empty() {
+		return fmt.Errorf("missing apiVersion or kind; try GetObjectKind().SetGroupVersionKind() if you know the type")
+	}
+
+	data, err := json.MarshalIndent(obj, "", "    ")
+	if err != nil {
+		return err
+	}
+	data = append(data, '\n')
+	_, err = w.Write(data)
+	return err
+}
+
+// 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.
+// If PrintObj() is called multiple times, objects are separated with a '---' separator.
+type YAMLPrinter struct {
+	printCount int64
+}
+
+// PrintObj prints the data as YAML.
+func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
+	// we use reflect.Indirect here in order to obtain the actual value from a pointer.
+	// we need an actual value in order to retrieve the package path for an object.
+	// using reflect.Indirect indiscriminately is valid here, as all runtime.Objects are supposed to be pointers.
+	if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj)).Type().PkgPath()) {
+		return fmt.Errorf(InternalObjectPrinterErr)
+	}
+
+	count := atomic.AddInt64(&p.printCount, 1)
+	if count > 1 {
+		if _, err := w.Write([]byte("---\n")); err != nil {
+			return err
+		}
+	}
+
+	switch obj := obj.(type) {
+	case *metav1.WatchEvent:
+		if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj.Object.Object)).Type().PkgPath()) {
+			return fmt.Errorf(InternalObjectPrinterErr)
+		}
+		data, err := json.Marshal(obj)
+		if err != nil {
+			return err
+		}
+		data, err = yaml.JSONToYAML(data)
+		if err != nil {
+			return err
+		}
+		_, err = w.Write(data)
+		return err
+	case *runtime.Unknown:
+		data, err := yaml.JSONToYAML(obj.Raw)
+		if err != nil {
+			return err
+		}
+		_, err = w.Write(data)
+		return err
+	}
+
+	if obj.GetObjectKind().GroupVersionKind().Empty() {
+		return fmt.Errorf("missing apiVersion or kind; try GetObjectKind().SetGroupVersionKind() if you know the type")
+	}
+
+	output, err := yaml.Marshal(obj)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprint(w, string(output))
+	return err
+}

vendor/k8s.io/cli-runtime/pkg/printers/jsonpath.go

@@ -0,0 +1,147 @@
+/*
+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"
+	"reflect"
+
+	"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{
+		rawTemplate: tmpl,
+		JSONPath:    j,
+	}, nil
+}
+
+// PrintObj formats the obj with the JSONPath Template.
+func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
+	// we use reflect.Indirect here in order to obtain the actual value from a pointer.
+	// we need an actual value in order to retrieve the package path for an object.
+	// using reflect.Indirect indiscriminately is valid here, as all runtime.Objects are supposed to be pointers.
+	if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj)).Type().PkgPath()) {
+		return fmt.Errorf(InternalObjectPrinterErr)
+	}
+
+	var queryObj interface{} = obj
+	if unstructured, ok := obj.(runtime.Unstructured); ok {
+		queryObj = unstructured.UnstructuredContent()
+	} else {
+		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 err := j.JSONPath.Execute(w, queryObj); err != nil {
+		buf := bytes.NewBuffer(nil)
+		fmt.Fprintf(buf, "Error executing template: %v. Printing more information for debugging the template:\n", err)
+		fmt.Fprintf(buf, "\ttemplate was:\n\t\t%v\n", j.rawTemplate)
+		fmt.Fprintf(buf, "\tobject given to jsonpath engine was:\n\t\t%#v\n\n", queryObj)
+		return fmt.Errorf("error executing jsonpath %q: %v\n", j.rawTemplate, buf.String())
+	}
+	return nil
+}

vendor/k8s.io/cli-runtime/pkg/printers/name.go

@@ -0,0 +1,130 @@
+/*
+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"
+
+	"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/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// NamePrinter is an implementation of ResourcePrinter which outputs "resource/name" pair of an object.
+type NamePrinter struct {
+	// ShortOutput indicates whether an operation should be
+	// printed along side the "resource/name" pair for an object.
+	ShortOutput bool
+	// Operation describes the name of the action that
+	// took place on an object, to be included in the
+	// finalized "successful" message.
+	Operation string
+}
+
+// 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 {
+	switch castObj := obj.(type) {
+	case *metav1.WatchEvent:
+		obj = castObj.Object.Object
+	}
+
+	// we use reflect.Indirect here in order to obtain the actual value from a pointer.
+	// using reflect.Indirect indiscriminately is valid here, as all runtime.Objects are supposed to be pointers.
+	// we need an actual value in order to retrieve the package path for an object.
+	if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj)).Type().PkgPath()) {
+		return fmt.Errorf(InternalObjectPrinterErr)
+	}
+
+	if meta.IsListType(obj) {
+		// we allow unstructured lists for now because they always contain the GVK information.  We should chase down
+		// callers and stop them from passing unflattened lists
+		// TODO chase the caller that is setting this and remove it.
+		if _, ok := obj.(*unstructured.UnstructuredList); !ok {
+			return fmt.Errorf("list types are not supported by name printing: %T", obj)
+		}
+
+		items, err := meta.ExtractList(obj)
+		if err != nil {
+			return err
+		}
+		for _, obj := range items {
+			if err := p.PrintObj(obj, w); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	if obj.GetObjectKind().GroupVersionKind().Empty() {
+		return fmt.Errorf("missing apiVersion or kind; try GetObjectKind().SetGroupVersionKind() if you know the type")
+	}
+
+	name := "<unknown>"
+	if acc, err := meta.Accessor(obj); err == nil {
+		if n := acc.GetName(); len(n) > 0 {
+			name = n
+		}
+	}
+
+	return printObj(w, name, p.Operation, p.ShortOutput, GetObjectGroupKind(obj))
+}
+
+func GetObjectGroupKind(obj runtime.Object) schema.GroupKind {
+	if obj == nil {
+		return schema.GroupKind{Kind: "<unknown>"}
+	}
+	groupVersionKind := obj.GetObjectKind().GroupVersionKind()
+	if len(groupVersionKind.Kind) > 0 {
+		return groupVersionKind.GroupKind()
+	}
+
+	if uns, ok := obj.(*unstructured.Unstructured); ok {
+		if len(uns.GroupVersionKind().Kind) > 0 {
+			return uns.GroupVersionKind().GroupKind()
+		}
+	}
+
+	return schema.GroupKind{Kind: "<unknown>"}
+}
+
+func printObj(w io.Writer, name string, operation string, shortOutput bool, groupKind schema.GroupKind) error {
+	if len(groupKind.Kind) == 0 {
+		return fmt.Errorf("missing kind for resource with name %v", name)
+	}
+
+	if len(operation) > 0 {
+		operation = " " + operation
+	}
+
+	if shortOutput {
+		operation = ""
+	}
+
+	if len(groupKind.Group) == 0 {
+		fmt.Fprintf(w, "%s/%s%s\n", strings.ToLower(groupKind.Kind), name, operation)
+		return nil
+	}
+
+	fmt.Fprintf(w, "%s.%s/%s%s\n", strings.ToLower(groupKind.Kind), groupKind.Group, name, operation)
+	return nil
+}

vendor/k8s.io/cli-runtime/pkg/printers/sourcechecker.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2018 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 (
+	"strings"
+)
+
+var (
+	InternalObjectPrinterErr = "a versioned object must be passed to a printer"
+
+	// disallowedPackagePrefixes contains regular expression templates
+	// for object package paths that are not allowed by printers.
+	disallowedPackagePrefixes = []string{
+		"k8s.io/kubernetes/pkg/apis/",
+	}
+)
+
+var InternalObjectPreventer = &illegalPackageSourceChecker{disallowedPackagePrefixes}
+
+func IsInternalObjectError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	return err.Error() == InternalObjectPrinterErr
+}
+
+// illegalPackageSourceChecker compares a given
+// object's package path, and determines if the
+// object originates from a disallowed source.
+type illegalPackageSourceChecker struct {
+	// disallowedPrefixes is a slice of disallowed package path
+	// prefixes for a given runtime.Object that we are printing.
+	disallowedPrefixes []string
+}
+
+func (c *illegalPackageSourceChecker) IsForbidden(pkgPath string) bool {
+	for _, forbiddenPrefix := range c.disallowedPrefixes {
+		if strings.HasPrefix(pkgPath, forbiddenPrefix) || strings.Contains(pkgPath, "/vendor/"+forbiddenPrefix) {
+			return true
+		}
+	}
+
+	return false
+}

vendor/k8s.io/cli-runtime/pkg/printers/tableprinter.go

@@ -0,0 +1,574 @@
+/*
+Copyright 2019 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"
+	"time"
+
+	"github.com/liggitt/tabwriter"
+	"k8s.io/apimachinery/pkg/api/meta"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/duration"
+	"k8s.io/apimachinery/pkg/watch"
+)
+
+var _ ResourcePrinter = &HumanReadablePrinter{}
+
+type printHandler struct {
+	columnDefinitions []metav1beta1.TableColumnDefinition
+	printFunc         reflect.Value
+}
+
+var (
+	statusHandlerEntry = &printHandler{
+		columnDefinitions: statusColumnDefinitions,
+		printFunc:         reflect.ValueOf(printStatus),
+	}
+
+	statusColumnDefinitions = []metav1beta1.TableColumnDefinition{
+		{Name: "Status", Type: "string"},
+		{Name: "Reason", Type: "string"},
+		{Name: "Message", Type: "string"},
+	}
+
+	defaultHandlerEntry = &printHandler{
+		columnDefinitions: objectMetaColumnDefinitions,
+		printFunc:         reflect.ValueOf(printObjectMeta),
+	}
+
+	objectMetaColumnDefinitions = []metav1beta1.TableColumnDefinition{
+		{Name: "Name", Type: "string", Format: "name", Description: metav1.ObjectMeta{}.SwaggerDoc()["name"]},
+		{Name: "Age", Type: "string", Description: metav1.ObjectMeta{}.SwaggerDoc()["creationTimestamp"]},
+	}
+
+	withEventTypePrefixColumns = []string{"EVENT"}
+	withNamespacePrefixColumns = []string{"NAMESPACE"} // TODO(erictune): print cluster name too.
+)
+
+// 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 {
+	options        PrintOptions
+	lastType       interface{}
+	lastColumns    []metav1beta1.TableColumnDefinition
+	printedHeaders bool
+}
+
+// NewTablePrinter creates a printer suitable for calling PrintObj().
+func NewTablePrinter(options PrintOptions) ResourcePrinter {
+	printer := &HumanReadablePrinter{
+		options: options,
+	}
+	return printer
+}
+
+func printHeader(columnNames []string, w io.Writer) error {
+	if _, err := fmt.Fprintf(w, "%s\n", strings.Join(columnNames, "\t")); err != nil {
+		return err
+	}
+	return nil
+}
+
+// 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 {
+
+	w, found := output.(*tabwriter.Writer)
+	if !found {
+		w = GetNewTabWriter(output)
+		output = w
+		defer w.Flush()
+	}
+
+	var eventType string
+	if event, isEvent := obj.(*metav1.WatchEvent); isEvent {
+		eventType = event.Type
+		obj = event.Object.Object
+	}
+
+	// Parameter "obj" is a table from server; print it.
+	// display tables following the rules of options
+	if table, ok := obj.(*metav1beta1.Table); ok {
+		// Do not print headers if this table has no column definitions, or they are the same as the last ones we printed
+		localOptions := h.options
+		if h.printedHeaders && (len(table.ColumnDefinitions) == 0 || reflect.DeepEqual(table.ColumnDefinitions, h.lastColumns)) {
+			localOptions.NoHeaders = true
+		}
+
+		if len(table.ColumnDefinitions) == 0 {
+			// If this table has no column definitions, use the columns from the last table we printed for decoration and layout.
+			// This is done when receiving tables in watch events to save bandwidth.
+			table.ColumnDefinitions = h.lastColumns
+		} else if !reflect.DeepEqual(table.ColumnDefinitions, h.lastColumns) {
+			// If this table has column definitions, remember them for future use.
+			h.lastColumns = table.ColumnDefinitions
+			h.printedHeaders = false
+		}
+
+		if len(table.Rows) > 0 {
+			h.printedHeaders = true
+		}
+
+		if err := decorateTable(table, localOptions); err != nil {
+			return err
+		}
+		if len(eventType) > 0 {
+			if err := addColumns(beginning, table,
+				[]metav1beta1.TableColumnDefinition{{Name: "Event", Type: "string"}},
+				[]cellValueFunc{func(metav1beta1.TableRow) (interface{}, error) { return formatEventType(eventType), nil }},
+			); err != nil {
+				return err
+			}
+		}
+		return printTable(table, output, localOptions)
+	}
+
+	// Could not find print handler for "obj"; use the default or status print handler.
+	// Print with the default or status handler, and use the columns from the last time
+	var handler *printHandler
+	if _, isStatus := obj.(*metav1.Status); isStatus {
+		handler = statusHandlerEntry
+	} else {
+		handler = defaultHandlerEntry
+	}
+
+	includeHeaders := h.lastType != handler && !h.options.NoHeaders
+
+	if h.lastType != nil && h.lastType != handler && !h.options.NoHeaders {
+		fmt.Fprintln(output)
+	}
+
+	if err := printRowsForHandlerEntry(output, handler, eventType, obj, h.options, includeHeaders); err != nil {
+		return err
+	}
+	h.lastType = handler
+
+	return nil
+}
+
+// printTable prints a table to the provided output respecting the filtering rules for options
+// for wide columns and filtered rows. It filters out rows that are Completed. You should call
+// decorateTable if you receive a table from a remote server before calling printTable.
+func printTable(table *metav1beta1.Table, output io.Writer, options PrintOptions) error {
+	if !options.NoHeaders {
+		// avoid printing headers if we have no rows to display
+		if len(table.Rows) == 0 {
+			return nil
+		}
+
+		first := true
+		for _, column := range table.ColumnDefinitions {
+			if !options.Wide && column.Priority != 0 {
+				continue
+			}
+			if first {
+				first = false
+			} else {
+				fmt.Fprint(output, "\t")
+			}
+			fmt.Fprint(output, strings.ToUpper(column.Name))
+		}
+		fmt.Fprintln(output)
+	}
+	for _, row := range table.Rows {
+		first := true
+		for i, cell := range row.Cells {
+			if i >= len(table.ColumnDefinitions) {
+				// https://issue.k8s.io/66379
+				// don't panic in case of bad output from the server, with more cells than column definitions
+				break
+			}
+			column := table.ColumnDefinitions[i]
+			if !options.Wide && column.Priority != 0 {
+				continue
+			}
+			if first {
+				first = false
+			} else {
+				fmt.Fprint(output, "\t")
+			}
+			if cell != nil {
+				fmt.Fprint(output, cell)
+			}
+		}
+		fmt.Fprintln(output)
+	}
+	return nil
+}
+
+type cellValueFunc func(metav1beta1.TableRow) (interface{}, error)
+
+type columnAddPosition int
+
+const (
+	beginning columnAddPosition = 1
+	end       columnAddPosition = 2
+)
+
+func addColumns(pos columnAddPosition, table *metav1beta1.Table, columns []metav1beta1.TableColumnDefinition, valueFuncs []cellValueFunc) error {
+	if len(columns) != len(valueFuncs) {
+		return fmt.Errorf("cannot prepend columns, unmatched value functions")
+	}
+	if len(columns) == 0 {
+		return nil
+	}
+
+	// Compute the new rows
+	newRows := make([][]interface{}, len(table.Rows))
+	for i := range table.Rows {
+		newCells := make([]interface{}, 0, len(columns)+len(table.Rows[i].Cells))
+
+		if pos == end {
+			// If we're appending, start with the existing cells,
+			// then add nil cells to match the number of columns
+			newCells = append(newCells, table.Rows[i].Cells...)
+			for len(newCells) < len(table.ColumnDefinitions) {
+				newCells = append(newCells, nil)
+			}
+		}
+
+		// Compute cells for new columns
+		for _, f := range valueFuncs {
+			newCell, err := f(table.Rows[i])
+			if err != nil {
+				return err
+			}
+			newCells = append(newCells, newCell)
+		}
+
+		if pos == beginning {
+			// If we're prepending, add existing cells
+			newCells = append(newCells, table.Rows[i].Cells...)
+		}
+
+		// Remember the new cells for this row
+		newRows[i] = newCells
+	}
+
+	// All cells successfully computed, now replace columns and rows
+	newColumns := make([]metav1beta1.TableColumnDefinition, 0, len(columns)+len(table.ColumnDefinitions))
+	switch pos {
+	case beginning:
+		newColumns = append(newColumns, columns...)
+		newColumns = append(newColumns, table.ColumnDefinitions...)
+	case end:
+		newColumns = append(newColumns, table.ColumnDefinitions...)
+		newColumns = append(newColumns, columns...)
+	default:
+		return fmt.Errorf("invalid column add position: %v", pos)
+	}
+	table.ColumnDefinitions = newColumns
+	for i := range table.Rows {
+		table.Rows[i].Cells = newRows[i]
+	}
+
+	return nil
+}
+
+// decorateTable takes a table and attempts to add label columns and the
+// namespace column. It will fill empty columns with nil (if the object
+// does not expose metadata). It returns an error if the table cannot
+// be decorated.
+func decorateTable(table *metav1beta1.Table, options PrintOptions) error {
+	width := len(table.ColumnDefinitions) + len(options.ColumnLabels)
+	if options.WithNamespace {
+		width++
+	}
+	if options.ShowLabels {
+		width++
+	}
+
+	columns := table.ColumnDefinitions
+
+	nameColumn := -1
+	if options.WithKind && !options.Kind.Empty() {
+		for i := range columns {
+			if columns[i].Format == "name" && columns[i].Type == "string" {
+				nameColumn = i
+				break
+			}
+		}
+	}
+
+	if width != len(table.ColumnDefinitions) {
+		columns = make([]metav1beta1.TableColumnDefinition, 0, width)
+		if options.WithNamespace {
+			columns = append(columns, metav1beta1.TableColumnDefinition{
+				Name: "Namespace",
+				Type: "string",
+			})
+		}
+		columns = append(columns, table.ColumnDefinitions...)
+		for _, label := range formatLabelHeaders(options.ColumnLabels) {
+			columns = append(columns, metav1beta1.TableColumnDefinition{
+				Name: label,
+				Type: "string",
+			})
+		}
+		if options.ShowLabels {
+			columns = append(columns, metav1beta1.TableColumnDefinition{
+				Name: "Labels",
+				Type: "string",
+			})
+		}
+	}
+
+	rows := table.Rows
+
+	includeLabels := len(options.ColumnLabels) > 0 || options.ShowLabels
+	if includeLabels || options.WithNamespace || nameColumn != -1 {
+		for i := range rows {
+			row := rows[i]
+
+			if nameColumn != -1 {
+				row.Cells[nameColumn] = fmt.Sprintf("%s/%s", strings.ToLower(options.Kind.String()), row.Cells[nameColumn])
+			}
+
+			var m metav1.Object
+			if obj := row.Object.Object; obj != nil {
+				if acc, err := meta.Accessor(obj); err == nil {
+					m = acc
+				}
+			}
+			// if we can't get an accessor, fill out the appropriate columns with empty spaces
+			if m == nil {
+				if options.WithNamespace {
+					r := make([]interface{}, 1, width)
+					row.Cells = append(r, row.Cells...)
+				}
+				for j := 0; j < width-len(row.Cells); j++ {
+					row.Cells = append(row.Cells, nil)
+				}
+				rows[i] = row
+				continue
+			}
+
+			if options.WithNamespace {
+				r := make([]interface{}, 1, width)
+				r[0] = m.GetNamespace()
+				row.Cells = append(r, row.Cells...)
+			}
+			if includeLabels {
+				row.Cells = appendLabelCells(row.Cells, m.GetLabels(), options)
+			}
+			rows[i] = row
+		}
+	}
+
+	table.ColumnDefinitions = columns
+	table.Rows = rows
+	return nil
+}
+
+// printRowsForHandlerEntry prints the incremental table output (headers if the current type is
+// different from lastType) including all the rows in the object. It returns the current type
+// or an error, if any.
+func printRowsForHandlerEntry(output io.Writer, handler *printHandler, eventType string, obj runtime.Object, options PrintOptions, includeHeaders bool) error {
+	var results []reflect.Value
+
+	args := []reflect.Value{reflect.ValueOf(obj), reflect.ValueOf(options)}
+	results = handler.printFunc.Call(args)
+	if !results[1].IsNil() {
+		return results[1].Interface().(error)
+	}
+
+	if includeHeaders {
+		var headers []string
+		for _, column := range handler.columnDefinitions {
+			if column.Priority != 0 && !options.Wide {
+				continue
+			}
+			headers = append(headers, strings.ToUpper(column.Name))
+		}
+		headers = append(headers, formatLabelHeaders(options.ColumnLabels)...)
+		// LABELS is always the last column.
+		headers = append(headers, formatShowLabelsHeader(options.ShowLabels)...)
+		// prepend namespace header
+		if options.WithNamespace {
+			headers = append(withNamespacePrefixColumns, headers...)
+		}
+		// prepend event type header
+		if len(eventType) > 0 {
+			headers = append(withEventTypePrefixColumns, headers...)
+		}
+		printHeader(headers, output)
+	}
+
+	if results[1].IsNil() {
+		rows := results[0].Interface().([]metav1beta1.TableRow)
+		printRows(output, eventType, rows, options)
+		return nil
+	}
+	return results[1].Interface().(error)
+}
+
+var formattedEventType = map[string]string{
+	string(watch.Added):    "ADDED   ",
+	string(watch.Modified): "MODIFIED",
+	string(watch.Deleted):  "DELETED ",
+	string(watch.Error):    "ERROR   ",
+}
+
+func formatEventType(eventType string) string {
+	if formatted, ok := formattedEventType[eventType]; ok {
+		return formatted
+	}
+	return string(eventType)
+}
+
+// printRows writes the provided rows to output.
+func printRows(output io.Writer, eventType string, rows []metav1beta1.TableRow, options PrintOptions) {
+	for _, row := range rows {
+		if len(eventType) > 0 {
+			fmt.Fprint(output, formatEventType(eventType))
+			fmt.Fprint(output, "\t")
+		}
+		if options.WithNamespace {
+			if obj := row.Object.Object; obj != nil {
+				if m, err := meta.Accessor(obj); err == nil {
+					fmt.Fprint(output, m.GetNamespace())
+				}
+			}
+			fmt.Fprint(output, "\t")
+		}
+
+		for i, cell := range row.Cells {
+			if i != 0 {
+				fmt.Fprint(output, "\t")
+			} else {
+				// TODO: remove this once we drop the legacy printers
+				if options.WithKind && !options.Kind.Empty() {
+					fmt.Fprintf(output, "%s/%s", strings.ToLower(options.Kind.String()), cell)
+					continue
+				}
+			}
+			fmt.Fprint(output, cell)
+		}
+
+		hasLabels := len(options.ColumnLabels) > 0
+		if obj := row.Object.Object; obj != nil && (hasLabels || options.ShowLabels) {
+			if m, err := meta.Accessor(obj); err == nil {
+				for _, value := range labelValues(m.GetLabels(), options) {
+					output.Write([]byte("\t"))
+					output.Write([]byte(value))
+				}
+			}
+		}
+
+		output.Write([]byte("\n"))
+	}
+}
+
+func formatLabelHeaders(columnLabels []string) []string {
+	formHead := make([]string, len(columnLabels))
+	for i, l := range columnLabels {
+		p := strings.Split(l, "/")
+		formHead[i] = strings.ToUpper((p[len(p)-1]))
+	}
+	return formHead
+}
+
+// headers for --show-labels=true
+func formatShowLabelsHeader(showLabels bool) []string {
+	if showLabels {
+		return []string{"LABELS"}
+	}
+	return nil
+}
+
+// labelValues returns a slice of value columns matching the requested print options.
+func labelValues(itemLabels map[string]string, opts PrintOptions) []string {
+	var values []string
+	for _, key := range opts.ColumnLabels {
+		values = append(values, itemLabels[key])
+	}
+	if opts.ShowLabels {
+		values = append(values, labels.FormatLabels(itemLabels))
+	}
+	return values
+}
+
+// appendLabelCells returns a slice of value columns matching the requested print options.
+// Intended for use with tables.
+func appendLabelCells(values []interface{}, itemLabels map[string]string, opts PrintOptions) []interface{} {
+	for _, key := range opts.ColumnLabels {
+		values = append(values, itemLabels[key])
+	}
+	if opts.ShowLabels {
+		values = append(values, labels.FormatLabels(itemLabels))
+	}
+	return values
+}
+
+func printStatus(obj runtime.Object, options PrintOptions) ([]metav1beta1.TableRow, error) {
+	status, ok := obj.(*metav1.Status)
+	if !ok {
+		return nil, fmt.Errorf("expected *v1.Status, got %T", obj)
+	}
+	return []metav1beta1.TableRow{{
+		Object: runtime.RawExtension{Object: obj},
+		Cells:  []interface{}{status.Status, status.Reason, status.Message},
+	}}, nil
+}
+
+func printObjectMeta(obj runtime.Object, options PrintOptions) ([]metav1beta1.TableRow, error) {
+	if meta.IsListType(obj) {
+		rows := make([]metav1beta1.TableRow, 0, 16)
+		err := meta.EachListItem(obj, func(obj runtime.Object) error {
+			nestedRows, err := printObjectMeta(obj, options)
+			if err != nil {
+				return err
+			}
+			rows = append(rows, nestedRows...)
+			return nil
+		})
+		if err != nil {
+			return nil, err
+		}
+		return rows, nil
+	}
+
+	rows := make([]metav1beta1.TableRow, 0, 1)
+	m, err := meta.Accessor(obj)
+	if err != nil {
+		return nil, err
+	}
+	row := metav1beta1.TableRow{
+		Object: runtime.RawExtension{Object: obj},
+	}
+	row.Cells = append(row.Cells, m.GetName(), translateTimestampSince(m.GetCreationTimestamp()))
+	rows = append(rows, row)
+	return rows, nil
+}
+
+// translateTimestampSince returns the elapsed time since timestamp in
+// human-readable approximation.
+func translateTimestampSince(timestamp metav1.Time) string {
+	if timestamp.IsZero() {
+		return "<unknown>"
+	}
+
+	return duration.HumanDuration(time.Since(timestamp.Time))
+}

vendor/k8s.io/cli-runtime/pkg/printers/tabwriter.go

@@ -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"
+
+	"github.com/liggitt/tabwriter"
+)
+
+const (
+	tabwriterMinWidth = 6
+	tabwriterWidth    = 4
+	tabwriterPadding  = 3
+	tabwriterPadChar  = ' '
+	tabwriterFlags    = tabwriter.RememberWidths
+)
+
+// 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)
+}

vendor/k8s.io/cli-runtime/pkg/printers/template.go

@@ -0,0 +1,118 @@
+/*
+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/base64"
+	"fmt"
+	"io"
+	"reflect"
+	"text/template"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/json"
+)
+
+// GoTemplatePrinter is an implementation of ResourcePrinter which formats data with a Go Template.
+type GoTemplatePrinter struct {
+	rawTemplate string
+	template    *template.Template
+}
+
+func NewGoTemplatePrinter(tmpl []byte) (*GoTemplatePrinter, error) {
+	t, err := template.New("output").
+		Funcs(template.FuncMap{
+			"exists":       exists,
+			"base64decode": base64decode,
+		}).
+		Parse(string(tmpl))
+	if err != nil {
+		return nil, err
+	}
+	return &GoTemplatePrinter{
+		rawTemplate: string(tmpl),
+		template:    t,
+	}, nil
+}
+
+// AllowMissingKeys tells the template engine if missing keys are allowed.
+func (p *GoTemplatePrinter) AllowMissingKeys(allow bool) {
+	if allow {
+		p.template.Option("missingkey=default")
+	} else {
+		p.template.Option("missingkey=error")
+	}
+}
+
+// PrintObj formats the obj with the Go Template.
+func (p *GoTemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
+	if InternalObjectPreventer.IsForbidden(reflect.Indirect(reflect.ValueOf(obj)).Type().PkgPath()) {
+		return fmt.Errorf(InternalObjectPrinterErr)
+	}
+
+	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
+}
+
+// safeExecute tries to execute the template, but catches panics and returns an error
+// should the template engine panic.
+func (p *GoTemplatePrinter) 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 base64decode(v string) (string, error) {
+	data, err := base64.StdEncoding.DecodeString(v)
+	if err != nil {
+		return "", fmt.Errorf("base64 decode failed: %v", err)
+	}
+	return string(data), nil
+}

vendor/k8s.io/cli-runtime/pkg/printers/typesetter.go

@@ -0,0 +1,95 @@
+/*
+Copyright 2018 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"
+)
+
+// TypeSetterPrinter is an implementation of ResourcePrinter wraps another printer with types set on the objects
+type TypeSetterPrinter struct {
+	Delegate ResourcePrinter
+
+	Typer runtime.ObjectTyper
+}
+
+// NewTypeSetter constructs a wrapping printer with required params
+func NewTypeSetter(typer runtime.ObjectTyper) *TypeSetterPrinter {
+	return &TypeSetterPrinter{Typer: typer}
+}
+
+// PrintObj is an implementation of ResourcePrinter.PrintObj which sets type information on the obj for the duration
+// of printing.  It is NOT threadsafe.
+func (p *TypeSetterPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
+	if obj == nil {
+		return p.Delegate.PrintObj(obj, w)
+	}
+	if !obj.GetObjectKind().GroupVersionKind().Empty() {
+		return p.Delegate.PrintObj(obj, w)
+	}
+
+	// we were empty coming in, make sure we're empty going out.  This makes the call thread-unsafe
+	defer func() {
+		obj.GetObjectKind().SetGroupVersionKind(schema.GroupVersionKind{})
+	}()
+
+	gvks, _, err := p.Typer.ObjectKinds(obj)
+	if err != nil {
+		// printers wrapped by us expect to find the type information present
+		return fmt.Errorf("missing apiVersion or kind and cannot assign it; %v", err)
+	}
+
+	for _, gvk := range gvks {
+		if len(gvk.Kind) == 0 {
+			continue
+		}
+		if len(gvk.Version) == 0 || gvk.Version == runtime.APIVersionInternal {
+			continue
+		}
+		obj.GetObjectKind().SetGroupVersionKind(gvk)
+		break
+	}
+
+	return p.Delegate.PrintObj(obj, w)
+}
+
+// ToPrinter returns a printer (not threadsafe!) that has been wrapped
+func (p *TypeSetterPrinter) ToPrinter(delegate ResourcePrinter) ResourcePrinter {
+	if p == nil {
+		return delegate
+	}
+
+	p.Delegate = delegate
+	return p
+}
+
+// WrapToPrinter wraps the common ToPrinter method
+func (p *TypeSetterPrinter) WrapToPrinter(delegate ResourcePrinter, err error) (ResourcePrinter, error) {
+	if err != nil {
+		return delegate, err
+	}
+	if p == nil {
+		return delegate, nil
+	}
+
+	p.Delegate = delegate
+	return p, nil
+}