Update vendor

vendor/k8s.io/kubectl/pkg/util/interrupt/interrupt.go

@@ -0,0 +1,104 @@
+/*
+Copyright 2016 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 interrupt
+
+import (
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+)
+
+// terminationSignals are signals that cause the program to exit in the
+// supported platforms (linux, darwin, windows).
+var terminationSignals = []os.Signal{syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT}
+
+// Handler guarantees execution of notifications after a critical section (the function passed
+// to a Run method), even in the presence of process termination. It guarantees exactly once
+// invocation of the provided notify functions.
+type Handler struct {
+	notify []func()
+	final  func(os.Signal)
+	once   sync.Once
+}
+
+// Chain creates a new handler that invokes all notify functions when the critical section exits
+// and then invokes the optional handler's notifications. This allows critical sections to be
+// nested without losing exactly once invocations. Notify functions can invoke any cleanup needed
+// but should not exit (which is the responsibility of the parent handler).
+func Chain(handler *Handler, notify ...func()) *Handler {
+	if handler == nil {
+		return New(nil, notify...)
+	}
+	return New(handler.Signal, append(notify, handler.Close)...)
+}
+
+// New creates a new handler that guarantees all notify functions are run after the critical
+// section exits (or is interrupted by the OS), then invokes the final handler. If no final
+// handler is specified, the default final is `os.Exit(1)`. A handler can only be used for
+// one critical section.
+func New(final func(os.Signal), notify ...func()) *Handler {
+	return &Handler{
+		final:  final,
+		notify: notify,
+	}
+}
+
+// Close executes all the notification handlers if they have not yet been executed.
+func (h *Handler) Close() {
+	h.once.Do(func() {
+		for _, fn := range h.notify {
+			fn()
+		}
+	})
+}
+
+// Signal is called when an os.Signal is received, and guarantees that all notifications
+// are executed, then the final handler is executed. This function should only be called once
+// per Handler instance.
+func (h *Handler) Signal(s os.Signal) {
+	h.once.Do(func() {
+		for _, fn := range h.notify {
+			fn()
+		}
+		if h.final == nil {
+			os.Exit(1)
+		}
+		h.final(s)
+	})
+}
+
+// Run ensures that any notifications are invoked after the provided fn exits (even if the
+// process is interrupted by an OS termination signal). Notifications are only invoked once
+// per Handler instance, so calling Run more than once will not behave as the user expects.
+func (h *Handler) Run(fn func() error) error {
+	ch := make(chan os.Signal, 1)
+	signal.Notify(ch, terminationSignals...)
+	defer func() {
+		signal.Stop(ch)
+		close(ch)
+	}()
+	go func() {
+		sig, ok := <-ch
+		if !ok {
+			return
+		}
+		h.Signal(sig)
+	}()
+	defer h.Close()
+	return fn()
+}

vendor/k8s.io/kubectl/pkg/util/openapi/OWNERS

@@ -0,0 +1,6 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+- apelisse
+reviewers:
+- apelisse

vendor/k8s.io/kubectl/pkg/util/openapi/doc.go

@@ -0,0 +1,21 @@
+/*
+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 openapi is a collection of libraries for fetching the openapi spec
+// from a Kubernetes server and then indexing the type definitions.
+// The openapi spec contains the object model definitions and extensions metadata
+// such as the patchStrategy and patchMergeKey for creating patches.
+package openapi // k8s.io/kubectl/pkg/util/openapi

vendor/k8s.io/kubectl/pkg/util/openapi/extensions.go

@@ -0,0 +1,27 @@
+/*
+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 openapi
+
+import "github.com/go-openapi/spec"
+
+// PrintColumnsKey is the key that defines which columns should be printed
+const PrintColumnsKey = "x-kubernetes-print-columns"
+
+// GetPrintColumns looks for the open API extension for the display columns.
+func GetPrintColumns(extensions spec.Extensions) (string, bool) {
+	return extensions.GetString(PrintColumnsKey)
+}

vendor/k8s.io/kubectl/pkg/util/openapi/openapi.go

@@ -0,0 +1,128 @@
+/*
+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 openapi
+
+import (
+	openapi_v2 "github.com/googleapis/gnostic/OpenAPIv2"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/kube-openapi/pkg/util/proto"
+)
+
+// Resources interface describe a resources provider, that can give you
+// resource based on group-version-kind.
+type Resources interface {
+	LookupResource(gvk schema.GroupVersionKind) proto.Schema
+}
+
+// groupVersionKindExtensionKey is the key used to lookup the
+// GroupVersionKind value for an object definition from the
+// definition's "extensions" map.
+const groupVersionKindExtensionKey = "x-kubernetes-group-version-kind"
+
+// document is an implementation of `Resources`. It looks for
+// resources in an openapi Schema.
+type document struct {
+	// Maps gvk to model name
+	resources map[schema.GroupVersionKind]string
+	models    proto.Models
+}
+
+var _ Resources = &document{}
+
+// NewOpenAPIData creates a new `Resources` out of the openapi document
+func NewOpenAPIData(doc *openapi_v2.Document) (Resources, error) {
+	models, err := proto.NewOpenAPIData(doc)
+	if err != nil {
+		return nil, err
+	}
+
+	resources := map[schema.GroupVersionKind]string{}
+	for _, modelName := range models.ListModels() {
+		model := models.LookupModel(modelName)
+		if model == nil {
+			panic("ListModels returns a model that can't be looked-up.")
+		}
+		gvkList := parseGroupVersionKind(model)
+		for _, gvk := range gvkList {
+			if len(gvk.Kind) > 0 {
+				resources[gvk] = modelName
+			}
+		}
+	}
+
+	return &document{
+		resources: resources,
+		models:    models,
+	}, nil
+}
+
+func (d *document) LookupResource(gvk schema.GroupVersionKind) proto.Schema {
+	modelName, found := d.resources[gvk]
+	if !found {
+		return nil
+	}
+	return d.models.LookupModel(modelName)
+}
+
+// Get and parse GroupVersionKind from the extension. Returns empty if it doesn't have one.
+func parseGroupVersionKind(s proto.Schema) []schema.GroupVersionKind {
+	extensions := s.GetExtensions()
+
+	gvkListResult := []schema.GroupVersionKind{}
+
+	// Get the extensions
+	gvkExtension, ok := extensions[groupVersionKindExtensionKey]
+	if !ok {
+		return []schema.GroupVersionKind{}
+	}
+
+	// gvk extension must be a list of at least 1 element.
+	gvkList, ok := gvkExtension.([]interface{})
+	if !ok {
+		return []schema.GroupVersionKind{}
+	}
+
+	for _, gvk := range gvkList {
+		// gvk extension list must be a map with group, version, and
+		// kind fields
+		gvkMap, ok := gvk.(map[interface{}]interface{})
+		if !ok {
+			continue
+		}
+		group, ok := gvkMap["group"].(string)
+		if !ok {
+			continue
+		}
+		version, ok := gvkMap["version"].(string)
+		if !ok {
+			continue
+		}
+		kind, ok := gvkMap["kind"].(string)
+		if !ok {
+			continue
+		}
+
+		gvkListResult = append(gvkListResult, schema.GroupVersionKind{
+			Group:   group,
+			Version: version,
+			Kind:    kind,
+		})
+	}
+
+	return gvkListResult
+}

vendor/k8s.io/kubectl/pkg/util/openapi/openapi_getter.go

@@ -0,0 +1,65 @@
+/*
+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 openapi
+
+import (
+	"sync"
+
+	"k8s.io/client-go/discovery"
+)
+
+// synchronizedOpenAPIGetter fetches the openapi schema once and then caches it in memory
+type synchronizedOpenAPIGetter struct {
+	// Cached results
+	sync.Once
+	openAPISchema Resources
+	err           error
+
+	openAPIClient discovery.OpenAPISchemaInterface
+}
+
+var _ Getter = &synchronizedOpenAPIGetter{}
+
+// Getter is an interface for fetching openapi specs and parsing them into an Resources struct
+type Getter interface {
+	// OpenAPIData returns the parsed OpenAPIData
+	Get() (Resources, error)
+}
+
+// NewOpenAPIGetter returns an object to return OpenAPIDatas which reads
+// from a server, and then stores in memory for subsequent invocations
+func NewOpenAPIGetter(openAPIClient discovery.OpenAPISchemaInterface) Getter {
+	return &synchronizedOpenAPIGetter{
+		openAPIClient: openAPIClient,
+	}
+}
+
+// Resources implements Getter
+func (g *synchronizedOpenAPIGetter) Get() (Resources, error) {
+	g.Do(func() {
+		s, err := g.openAPIClient.OpenAPISchema()
+		if err != nil {
+			g.err = err
+			return
+		}
+
+		g.openAPISchema, g.err = NewOpenAPIData(s)
+	})
+
+	// Return the save result
+	return g.openAPISchema, g.err
+}

vendor/k8s.io/kubectl/pkg/util/openapi/validation/validation.go

@@ -0,0 +1,140 @@
+/*
+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 validation
+
+import (
+	"errors"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+	"k8s.io/apimachinery/pkg/util/json"
+	"k8s.io/apimachinery/pkg/util/yaml"
+	"k8s.io/kube-openapi/pkg/util/proto/validation"
+	"k8s.io/kubectl/pkg/util/openapi"
+)
+
+// SchemaValidation validates the object against an OpenAPI schema.
+type SchemaValidation struct {
+	resources openapi.Resources
+}
+
+// NewSchemaValidation creates a new SchemaValidation that can be used
+// to validate objects.
+func NewSchemaValidation(resources openapi.Resources) *SchemaValidation {
+	return &SchemaValidation{
+		resources: resources,
+	}
+}
+
+// ValidateBytes will validates the object against using the Resources
+// object.
+func (v *SchemaValidation) ValidateBytes(data []byte) error {
+	obj, err := parse(data)
+	if err != nil {
+		return err
+	}
+
+	gvk, errs := getObjectKind(obj)
+	if errs != nil {
+		return utilerrors.NewAggregate(errs)
+	}
+
+	if (gvk == schema.GroupVersionKind{Version: "v1", Kind: "List"}) {
+		return utilerrors.NewAggregate(v.validateList(obj))
+	}
+
+	return utilerrors.NewAggregate(v.validateResource(obj, gvk))
+}
+
+func (v *SchemaValidation) validateList(object interface{}) []error {
+	fields, ok := object.(map[string]interface{})
+	if !ok || fields == nil {
+		return []error{errors.New("invalid object to validate")}
+	}
+
+	allErrors := []error{}
+	if _, ok := fields["items"].([]interface{}); !ok {
+		return []error{errors.New("invalid object to validate")}
+	}
+	for _, item := range fields["items"].([]interface{}) {
+		if gvk, errs := getObjectKind(item); errs != nil {
+			allErrors = append(allErrors, errs...)
+		} else {
+			allErrors = append(allErrors, v.validateResource(item, gvk)...)
+		}
+	}
+	return allErrors
+}
+
+func (v *SchemaValidation) validateResource(obj interface{}, gvk schema.GroupVersionKind) []error {
+	resource := v.resources.LookupResource(gvk)
+	if resource == nil {
+		// resource is not present, let's just skip validation.
+		return nil
+	}
+
+	return validation.ValidateModel(obj, resource, gvk.Kind)
+}
+
+func parse(data []byte) (interface{}, error) {
+	var obj interface{}
+	out, err := yaml.ToJSON(data)
+	if err != nil {
+		return nil, err
+	}
+	if err := json.Unmarshal(out, &obj); err != nil {
+		return nil, err
+	}
+	return obj, nil
+}
+
+func getObjectKind(object interface{}) (schema.GroupVersionKind, []error) {
+	var listErrors []error
+	fields, ok := object.(map[string]interface{})
+	if !ok || fields == nil {
+		listErrors = append(listErrors, errors.New("invalid object to validate"))
+		return schema.GroupVersionKind{}, listErrors
+	}
+
+	var group string
+	var version string
+	apiVersion := fields["apiVersion"]
+	if apiVersion == nil {
+		listErrors = append(listErrors, errors.New("apiVersion not set"))
+	} else if _, ok := apiVersion.(string); !ok {
+		listErrors = append(listErrors, errors.New("apiVersion isn't string type"))
+	} else {
+		gv, err := schema.ParseGroupVersion(apiVersion.(string))
+		if err != nil {
+			listErrors = append(listErrors, err)
+		} else {
+			group = gv.Group
+			version = gv.Version
+		}
+	}
+	kind := fields["kind"]
+	if kind == nil {
+		listErrors = append(listErrors, errors.New("kind not set"))
+	} else if _, ok := kind.(string); !ok {
+		listErrors = append(listErrors, errors.New("kind isn't string type"))
+	}
+	if listErrors != nil {
+		return schema.GroupVersionKind{}, listErrors
+	}
+
+	return schema.GroupVersionKind{Group: group, Version: version, Kind: kind.(string)}, nil
+}

vendor/k8s.io/kubectl/pkg/util/templates/command_groups.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2016 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 templates
+
+import (
+	"github.com/spf13/cobra"
+)
+
+type CommandGroup struct {
+	Message  string
+	Commands []*cobra.Command
+}
+
+type CommandGroups []CommandGroup
+
+func (g CommandGroups) Add(c *cobra.Command) {
+	for _, group := range g {
+		c.AddCommand(group.Commands...)
+	}
+}
+
+func (g CommandGroups) Has(c *cobra.Command) bool {
+	for _, group := range g {
+		for _, command := range group.Commands {
+			if command == c {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func AddAdditionalCommands(g CommandGroups, message string, cmds []*cobra.Command) CommandGroups {
+	group := CommandGroup{Message: message}
+	for _, c := range cmds {
+		// Don't show commands that have no short description
+		if !g.Has(c) && len(c.Short) != 0 {
+			group.Commands = append(group.Commands, c)
+		}
+	}
+	if len(group.Commands) == 0 {
+		return g
+	}
+	return append(g, group)
+}

vendor/k8s.io/kubectl/pkg/util/templates/markdown.go

@@ -0,0 +1,147 @@
+/*
+Copyright 2016 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 templates
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+
+	"github.com/russross/blackfriday"
+)
+
+const linebreak = "\n"
+
+// ASCIIRenderer implements blackfriday.Renderer
+var _ blackfriday.Renderer = &ASCIIRenderer{}
+
+// ASCIIRenderer is a blackfriday.Renderer intended for rendering markdown
+// documents as plain text, well suited for human reading on terminals.
+type ASCIIRenderer struct {
+	Indentation string
+
+	listItemCount uint
+	listLevel     uint
+}
+
+// NormalText gets a text chunk *after* the markdown syntax was already
+// processed and does a final cleanup on things we don't expect here, like
+// removing linebreaks on things that are not a paragraph break (auto unwrap).
+func (r *ASCIIRenderer) NormalText(out *bytes.Buffer, text []byte) {
+	raw := string(text)
+	lines := strings.Split(raw, linebreak)
+	for _, line := range lines {
+		trimmed := strings.Trim(line, " \n\t")
+		if len(trimmed) > 0 && trimmed[0] != '_' {
+			out.WriteString(" ")
+		}
+		out.WriteString(trimmed)
+	}
+}
+
+// List renders the start and end of a list.
+func (r *ASCIIRenderer) List(out *bytes.Buffer, text func() bool, flags int) {
+	r.listLevel++
+	out.WriteString(linebreak)
+	text()
+	r.listLevel--
+}
+
+// ListItem renders list items and supports both ordered and unordered lists.
+func (r *ASCIIRenderer) ListItem(out *bytes.Buffer, text []byte, flags int) {
+	if flags&blackfriday.LIST_ITEM_BEGINNING_OF_LIST != 0 {
+		r.listItemCount = 1
+	} else {
+		r.listItemCount++
+	}
+	indent := strings.Repeat(r.Indentation, int(r.listLevel))
+	var bullet string
+	if flags&blackfriday.LIST_TYPE_ORDERED != 0 {
+		bullet += fmt.Sprintf("%d.", r.listItemCount)
+	} else {
+		bullet += "*"
+	}
+	out.WriteString(indent + bullet + " ")
+	r.fw(out, text)
+	out.WriteString(linebreak)
+}
+
+// Paragraph renders the start and end of a paragraph.
+func (r *ASCIIRenderer) Paragraph(out *bytes.Buffer, text func() bool) {
+	out.WriteString(linebreak)
+	text()
+	out.WriteString(linebreak)
+}
+
+// BlockCode renders a chunk of text that represents source code.
+func (r *ASCIIRenderer) BlockCode(out *bytes.Buffer, text []byte, lang string) {
+	out.WriteString(linebreak)
+	lines := []string{}
+	for _, line := range strings.Split(string(text), linebreak) {
+		indented := r.Indentation + line
+		lines = append(lines, indented)
+	}
+	out.WriteString(strings.Join(lines, linebreak))
+}
+
+func (r *ASCIIRenderer) GetFlags() int { return 0 }
+func (r *ASCIIRenderer) HRule(out *bytes.Buffer) {
+	out.WriteString(linebreak + "----------" + linebreak)
+}
+func (r *ASCIIRenderer) LineBreak(out *bytes.Buffer)                                      { out.WriteString(linebreak) }
+func (r *ASCIIRenderer) TitleBlock(out *bytes.Buffer, text []byte)                        { r.fw(out, text) }
+func (r *ASCIIRenderer) Header(out *bytes.Buffer, text func() bool, level int, id string) { text() }
+func (r *ASCIIRenderer) BlockHtml(out *bytes.Buffer, text []byte)                         { r.fw(out, text) }
+func (r *ASCIIRenderer) BlockQuote(out *bytes.Buffer, text []byte)                        { r.fw(out, text) }
+func (r *ASCIIRenderer) TableRow(out *bytes.Buffer, text []byte)                          { r.fw(out, text) }
+func (r *ASCIIRenderer) TableHeaderCell(out *bytes.Buffer, text []byte, align int)        { r.fw(out, text) }
+func (r *ASCIIRenderer) TableCell(out *bytes.Buffer, text []byte, align int)              { r.fw(out, text) }
+func (r *ASCIIRenderer) Footnotes(out *bytes.Buffer, text func() bool)                    { text() }
+func (r *ASCIIRenderer) FootnoteItem(out *bytes.Buffer, name, text []byte, flags int)     { r.fw(out, text) }
+func (r *ASCIIRenderer) AutoLink(out *bytes.Buffer, link []byte, kind int)                { r.fw(out, link) }
+func (r *ASCIIRenderer) CodeSpan(out *bytes.Buffer, text []byte)                          { r.fw(out, text) }
+func (r *ASCIIRenderer) DoubleEmphasis(out *bytes.Buffer, text []byte)                    { r.fw(out, text) }
+func (r *ASCIIRenderer) Emphasis(out *bytes.Buffer, text []byte)                          { r.fw(out, text) }
+func (r *ASCIIRenderer) RawHtmlTag(out *bytes.Buffer, text []byte)                        { r.fw(out, text) }
+func (r *ASCIIRenderer) TripleEmphasis(out *bytes.Buffer, text []byte)                    { r.fw(out, text) }
+func (r *ASCIIRenderer) StrikeThrough(out *bytes.Buffer, text []byte)                     { r.fw(out, text) }
+func (r *ASCIIRenderer) FootnoteRef(out *bytes.Buffer, ref []byte, id int)                { r.fw(out, ref) }
+func (r *ASCIIRenderer) Entity(out *bytes.Buffer, entity []byte)                          { r.fw(out, entity) }
+func (r *ASCIIRenderer) Smartypants(out *bytes.Buffer, text []byte)                       { r.fw(out, text) }
+func (r *ASCIIRenderer) DocumentHeader(out *bytes.Buffer)                                 {}
+func (r *ASCIIRenderer) DocumentFooter(out *bytes.Buffer)                                 {}
+func (r *ASCIIRenderer) TocHeaderWithAnchor(text []byte, level int, anchor string)        {}
+func (r *ASCIIRenderer) TocHeader(text []byte, level int)                                 {}
+func (r *ASCIIRenderer) TocFinalize()                                                     {}
+
+func (r *ASCIIRenderer) Table(out *bytes.Buffer, header []byte, body []byte, columnData []int) {
+	r.fw(out, header, body)
+}
+
+func (r *ASCIIRenderer) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
+	r.fw(out, link)
+}
+
+func (r *ASCIIRenderer) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
+	r.fw(out, link)
+}
+
+func (r *ASCIIRenderer) fw(out *bytes.Buffer, text ...[]byte) {
+	for _, t := range text {
+		out.Write(t)
+	}
+}

vendor/k8s.io/kubectl/pkg/util/templates/normalizers.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2016 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 templates
+
+import (
+	"strings"
+
+	"github.com/MakeNowJust/heredoc"
+	"github.com/russross/blackfriday"
+	"github.com/spf13/cobra"
+)
+
+const Indentation = `  `
+
+// LongDesc normalizes a command's long description to follow the conventions.
+func LongDesc(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	return normalizer{s}.heredoc().markdown().trim().string
+}
+
+// Examples normalizes a command's examples to follow the conventions.
+func Examples(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	return normalizer{s}.trim().indent().string
+}
+
+// Normalize perform all required normalizations on a given command.
+func Normalize(cmd *cobra.Command) *cobra.Command {
+	if len(cmd.Long) > 0 {
+		cmd.Long = LongDesc(cmd.Long)
+	}
+	if len(cmd.Example) > 0 {
+		cmd.Example = Examples(cmd.Example)
+	}
+	return cmd
+}
+
+// NormalizeAll perform all required normalizations in the entire command tree.
+func NormalizeAll(cmd *cobra.Command) *cobra.Command {
+	if cmd.HasSubCommands() {
+		for _, subCmd := range cmd.Commands() {
+			NormalizeAll(subCmd)
+		}
+	}
+	Normalize(cmd)
+	return cmd
+}
+
+type normalizer struct {
+	string
+}
+
+func (s normalizer) markdown() normalizer {
+	bytes := []byte(s.string)
+	formatted := blackfriday.Markdown(bytes, &ASCIIRenderer{Indentation: Indentation}, blackfriday.EXTENSION_NO_INTRA_EMPHASIS)
+	s.string = string(formatted)
+	return s
+}
+
+func (s normalizer) heredoc() normalizer {
+	s.string = heredoc.Doc(s.string)
+	return s
+}
+
+func (s normalizer) trim() normalizer {
+	s.string = strings.TrimSpace(s.string)
+	return s
+}
+
+func (s normalizer) indent() normalizer {
+	indentedLines := []string{}
+	for _, line := range strings.Split(s.string, "\n") {
+		trimmed := strings.TrimSpace(line)
+		indented := Indentation + trimmed
+		indentedLines = append(indentedLines, indented)
+	}
+	s.string = strings.Join(indentedLines, "\n")
+	return s
+}

vendor/k8s.io/kubectl/pkg/util/templates/templater.go

@@ -0,0 +1,298 @@
+/*
+Copyright 2016 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 templates
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+	"text/template"
+	"unicode"
+
+	"k8s.io/kubectl/pkg/util/term"
+
+	"github.com/spf13/cobra"
+	flag "github.com/spf13/pflag"
+)
+
+type FlagExposer interface {
+	ExposeFlags(cmd *cobra.Command, flags ...string) FlagExposer
+}
+
+func ActsAsRootCommand(cmd *cobra.Command, filters []string, groups ...CommandGroup) FlagExposer {
+	if cmd == nil {
+		panic("nil root command")
+	}
+	templater := &templater{
+		RootCmd:       cmd,
+		UsageTemplate: MainUsageTemplate(),
+		HelpTemplate:  MainHelpTemplate(),
+		CommandGroups: groups,
+		Filtered:      filters,
+	}
+	cmd.SetFlagErrorFunc(templater.FlagErrorFunc())
+	cmd.SilenceUsage = true
+	cmd.SetUsageFunc(templater.UsageFunc())
+	cmd.SetHelpFunc(templater.HelpFunc())
+	return templater
+}
+
+func UseOptionsTemplates(cmd *cobra.Command) {
+	templater := &templater{
+		UsageTemplate: OptionsUsageTemplate(),
+		HelpTemplate:  OptionsHelpTemplate(),
+	}
+	cmd.SetUsageFunc(templater.UsageFunc())
+	cmd.SetHelpFunc(templater.HelpFunc())
+}
+
+type templater struct {
+	UsageTemplate string
+	HelpTemplate  string
+	RootCmd       *cobra.Command
+	CommandGroups
+	Filtered []string
+}
+
+func (templater *templater) FlagErrorFunc(exposedFlags ...string) func(*cobra.Command, error) error {
+	return func(c *cobra.Command, err error) error {
+		c.SilenceUsage = true
+		switch c.CalledAs() {
+		case "options":
+			return fmt.Errorf("%s\nRun '%s' without flags.", err, c.CommandPath())
+		default:
+			return fmt.Errorf("%s\nSee '%s --help' for usage.", err, c.CommandPath())
+		}
+	}
+}
+
+func (templater *templater) ExposeFlags(cmd *cobra.Command, flags ...string) FlagExposer {
+	cmd.SetUsageFunc(templater.UsageFunc(flags...))
+	return templater
+}
+
+func (templater *templater) HelpFunc() func(*cobra.Command, []string) {
+	return func(c *cobra.Command, s []string) {
+		t := template.New("help")
+		t.Funcs(templater.templateFuncs())
+		template.Must(t.Parse(templater.HelpTemplate))
+		out := term.NewResponsiveWriter(c.OutOrStdout())
+		err := t.Execute(out, c)
+		if err != nil {
+			c.Println(err)
+		}
+	}
+}
+
+func (templater *templater) UsageFunc(exposedFlags ...string) func(*cobra.Command) error {
+	return func(c *cobra.Command) error {
+		t := template.New("usage")
+		t.Funcs(templater.templateFuncs(exposedFlags...))
+		template.Must(t.Parse(templater.UsageTemplate))
+		out := term.NewResponsiveWriter(c.OutOrStderr())
+		return t.Execute(out, c)
+	}
+}
+
+func (templater *templater) templateFuncs(exposedFlags ...string) template.FuncMap {
+	return template.FuncMap{
+		"trim":                strings.TrimSpace,
+		"trimRight":           func(s string) string { return strings.TrimRightFunc(s, unicode.IsSpace) },
+		"trimLeft":            func(s string) string { return strings.TrimLeftFunc(s, unicode.IsSpace) },
+		"gt":                  cobra.Gt,
+		"eq":                  cobra.Eq,
+		"rpad":                rpad,
+		"appendIfNotPresent":  appendIfNotPresent,
+		"flagsNotIntersected": flagsNotIntersected,
+		"visibleFlags":        visibleFlags,
+		"flagsUsages":         flagsUsages,
+		"cmdGroups":           templater.cmdGroups,
+		"cmdGroupsString":     templater.cmdGroupsString,
+		"rootCmd":             templater.rootCmdName,
+		"isRootCmd":           templater.isRootCmd,
+		"optionsCmdFor":       templater.optionsCmdFor,
+		"usageLine":           templater.usageLine,
+		"exposed": func(c *cobra.Command) *flag.FlagSet {
+			exposed := flag.NewFlagSet("exposed", flag.ContinueOnError)
+			if len(exposedFlags) > 0 {
+				for _, name := range exposedFlags {
+					if flag := c.Flags().Lookup(name); flag != nil {
+						exposed.AddFlag(flag)
+					}
+				}
+			}
+			return exposed
+		},
+	}
+}
+
+func (templater *templater) cmdGroups(c *cobra.Command, all []*cobra.Command) []CommandGroup {
+	if len(templater.CommandGroups) > 0 && c == templater.RootCmd {
+		all = filter(all, templater.Filtered...)
+		return AddAdditionalCommands(templater.CommandGroups, "Other Commands:", all)
+	}
+	all = filter(all, "options")
+	return []CommandGroup{
+		{
+			Message:  "Available Commands:",
+			Commands: all,
+		},
+	}
+}
+
+func (t *templater) cmdGroupsString(c *cobra.Command) string {
+	groups := []string{}
+	for _, cmdGroup := range t.cmdGroups(c, c.Commands()) {
+		cmds := []string{cmdGroup.Message}
+		for _, cmd := range cmdGroup.Commands {
+			if cmd.IsAvailableCommand() {
+				cmds = append(cmds, "  "+rpad(cmd.Name(), cmd.NamePadding())+" "+cmd.Short)
+			}
+		}
+		groups = append(groups, strings.Join(cmds, "\n"))
+	}
+	return strings.Join(groups, "\n\n")
+}
+
+func (t *templater) rootCmdName(c *cobra.Command) string {
+	return t.rootCmd(c).CommandPath()
+}
+
+func (t *templater) isRootCmd(c *cobra.Command) bool {
+	return t.rootCmd(c) == c
+}
+
+func (t *templater) parents(c *cobra.Command) []*cobra.Command {
+	parents := []*cobra.Command{c}
+	for current := c; !t.isRootCmd(current) && current.HasParent(); {
+		current = current.Parent()
+		parents = append(parents, current)
+	}
+	return parents
+}
+
+func (t *templater) rootCmd(c *cobra.Command) *cobra.Command {
+	if c != nil && !c.HasParent() {
+		return c
+	}
+	if t.RootCmd == nil {
+		panic("nil root cmd")
+	}
+	return t.RootCmd
+}
+
+func (t *templater) optionsCmdFor(c *cobra.Command) string {
+	if !c.Runnable() {
+		return ""
+	}
+	rootCmdStructure := t.parents(c)
+	for i := len(rootCmdStructure) - 1; i >= 0; i-- {
+		cmd := rootCmdStructure[i]
+		if _, _, err := cmd.Find([]string{"options"}); err == nil {
+			return cmd.CommandPath() + " options"
+		}
+	}
+	return ""
+}
+
+func (t *templater) usageLine(c *cobra.Command) string {
+	usage := c.UseLine()
+	suffix := "[options]"
+	if c.HasFlags() && !strings.Contains(usage, suffix) {
+		usage += " " + suffix
+	}
+	return usage
+}
+
+func flagsUsages(f *flag.FlagSet) string {
+	x := new(bytes.Buffer)
+
+	f.VisitAll(func(flag *flag.Flag) {
+		if flag.Hidden {
+			return
+		}
+		format := "--%s=%s: %s\n"
+
+		if flag.Value.Type() == "string" {
+			format = "--%s='%s': %s\n"
+		}
+
+		if len(flag.Shorthand) > 0 {
+			format = "  -%s, " + format
+		} else {
+			format = "   %s   " + format
+		}
+
+		fmt.Fprintf(x, format, flag.Shorthand, flag.Name, flag.DefValue, flag.Usage)
+	})
+
+	return x.String()
+}
+
+func rpad(s string, padding int) string {
+	template := fmt.Sprintf("%%-%ds", padding)
+	return fmt.Sprintf(template, s)
+}
+
+func appendIfNotPresent(s, stringToAppend string) string {
+	if strings.Contains(s, stringToAppend) {
+		return s
+	}
+	return s + " " + stringToAppend
+}
+
+func flagsNotIntersected(l *flag.FlagSet, r *flag.FlagSet) *flag.FlagSet {
+	f := flag.NewFlagSet("notIntersected", flag.ContinueOnError)
+	l.VisitAll(func(flag *flag.Flag) {
+		if r.Lookup(flag.Name) == nil {
+			f.AddFlag(flag)
+		}
+	})
+	return f
+}
+
+func visibleFlags(l *flag.FlagSet) *flag.FlagSet {
+	hidden := "help"
+	f := flag.NewFlagSet("visible", flag.ContinueOnError)
+	l.VisitAll(func(flag *flag.Flag) {
+		if flag.Name != hidden {
+			f.AddFlag(flag)
+		}
+	})
+	return f
+}
+
+func filter(cmds []*cobra.Command, names ...string) []*cobra.Command {
+	out := []*cobra.Command{}
+	for _, c := range cmds {
+		if c.Hidden {
+			continue
+		}
+		skip := false
+		for _, name := range names {
+			if name == c.Name() {
+				skip = true
+				break
+			}
+		}
+		if skip {
+			continue
+		}
+		out = append(out, c)
+	}
+	return out
+}

vendor/k8s.io/kubectl/pkg/util/templates/templates.go

@@ -0,0 +1,103 @@
+/*
+Copyright 2016 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 templates
+
+import (
+	"strings"
+	"unicode"
+)
+
+const (
+	// SectionVars is the help template section that declares variables to be used in the template.
+	SectionVars = `{{$isRootCmd := isRootCmd .}}` +
+		`{{$rootCmd := rootCmd .}}` +
+		`{{$visibleFlags := visibleFlags (flagsNotIntersected .LocalFlags .PersistentFlags)}}` +
+		`{{$explicitlyExposedFlags := exposed .}}` +
+		`{{$optionsCmdFor := optionsCmdFor .}}` +
+		`{{$usageLine := usageLine .}}`
+
+	// SectionAliases is the help template section that displays command aliases.
+	SectionAliases = `{{if gt .Aliases 0}}Aliases:
+{{.NameAndAliases}}
+
+{{end}}`
+
+	// SectionExamples is the help template section that displays command examples.
+	SectionExamples = `{{if .HasExample}}Examples:
+{{trimRight .Example}}
+
+{{end}}`
+
+	// SectionSubcommands is the help template section that displays the command's subcommands.
+	SectionSubcommands = `{{if .HasAvailableSubCommands}}{{cmdGroupsString .}}
+
+{{end}}`
+
+	// SectionFlags is the help template section that displays the command's flags.
+	SectionFlags = `{{ if or $visibleFlags.HasFlags $explicitlyExposedFlags.HasFlags}}Options:
+{{ if $visibleFlags.HasFlags}}{{trimRight (flagsUsages $visibleFlags)}}{{end}}{{ if $explicitlyExposedFlags.HasFlags}}{{ if $visibleFlags.HasFlags}}
+{{end}}{{trimRight (flagsUsages $explicitlyExposedFlags)}}{{end}}
+
+{{end}}`
+
+	// SectionUsage is the help template section that displays the command's usage.
+	SectionUsage = `{{if and .Runnable (ne .UseLine "") (ne .UseLine $rootCmd)}}Usage:
+  {{$usageLine}}
+
+{{end}}`
+
+	// SectionTipsHelp is the help template section that displays the '--help' hint.
+	SectionTipsHelp = `{{if .HasSubCommands}}Use "{{$rootCmd}} <command> --help" for more information about a given command.
+{{end}}`
+
+	// SectionTipsGlobalOptions is the help template section that displays the 'options' hint for displaying global flags.
+	SectionTipsGlobalOptions = `{{if $optionsCmdFor}}Use "{{$optionsCmdFor}}" for a list of global command-line options (applies to all commands).
+{{end}}`
+)
+
+// MainHelpTemplate if the template for 'help' used by most commands.
+func MainHelpTemplate() string {
+	return `{{with or .Long .Short }}{{. | trim}}{{end}}{{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}`
+}
+
+// MainUsageTemplate if the template for 'usage' used by most commands.
+func MainUsageTemplate() string {
+	sections := []string{
+		"\n\n",
+		SectionVars,
+		SectionAliases,
+		SectionExamples,
+		SectionSubcommands,
+		SectionFlags,
+		SectionUsage,
+		SectionTipsHelp,
+		SectionTipsGlobalOptions,
+	}
+	return strings.TrimRightFunc(strings.Join(sections, ""), unicode.IsSpace)
+}
+
+// OptionsHelpTemplate if the template for 'help' used by the 'options' command.
+func OptionsHelpTemplate() string {
+	return ""
+}
+
+// OptionsUsageTemplate if the template for 'usage' used by the 'options' command.
+func OptionsUsageTemplate() string {
+	return `{{ if .HasInheritedFlags}}The following options can be passed to any command:
+
+{{flagsUsages .InheritedFlags}}{{end}}`
+}

vendor/k8s.io/kubectl/pkg/util/term/resize.go

@@ -0,0 +1,132 @@
+/*
+Copyright 2016 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 term
+
+import (
+	"fmt"
+
+	"github.com/docker/docker/pkg/term"
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// GetSize returns the current size of the user's terminal. If it isn't a terminal,
+// nil is returned.
+func (t TTY) GetSize() *remotecommand.TerminalSize {
+	outFd, isTerminal := term.GetFdInfo(t.Out)
+	if !isTerminal {
+		return nil
+	}
+	return GetSize(outFd)
+}
+
+// GetSize returns the current size of the terminal associated with fd.
+func GetSize(fd uintptr) *remotecommand.TerminalSize {
+	winsize, err := term.GetWinsize(fd)
+	if err != nil {
+		runtime.HandleError(fmt.Errorf("unable to get terminal size: %v", err))
+		return nil
+	}
+
+	return &remotecommand.TerminalSize{Width: winsize.Width, Height: winsize.Height}
+}
+
+// MonitorSize monitors the terminal's size. It returns a TerminalSizeQueue primed with
+// initialSizes, or nil if there's no TTY present.
+func (t *TTY) MonitorSize(initialSizes ...*remotecommand.TerminalSize) remotecommand.TerminalSizeQueue {
+	outFd, isTerminal := term.GetFdInfo(t.Out)
+	if !isTerminal {
+		return nil
+	}
+
+	t.sizeQueue = &sizeQueue{
+		t: *t,
+		// make it buffered so we can send the initial terminal sizes without blocking, prior to starting
+		// the streaming below
+		resizeChan:   make(chan remotecommand.TerminalSize, len(initialSizes)),
+		stopResizing: make(chan struct{}),
+	}
+
+	t.sizeQueue.monitorSize(outFd, initialSizes...)
+
+	return t.sizeQueue
+}
+
+// sizeQueue implements remotecommand.TerminalSizeQueue
+type sizeQueue struct {
+	t TTY
+	// resizeChan receives a Size each time the user's terminal is resized.
+	resizeChan   chan remotecommand.TerminalSize
+	stopResizing chan struct{}
+}
+
+// make sure sizeQueue implements the resize.TerminalSizeQueue interface
+var _ remotecommand.TerminalSizeQueue = &sizeQueue{}
+
+// monitorSize primes resizeChan with initialSizes and then monitors for resize events. With each
+// new event, it sends the current terminal size to resizeChan.
+func (s *sizeQueue) monitorSize(outFd uintptr, initialSizes ...*remotecommand.TerminalSize) {
+	// send the initial sizes
+	for i := range initialSizes {
+		if initialSizes[i] != nil {
+			s.resizeChan <- *initialSizes[i]
+		}
+	}
+
+	resizeEvents := make(chan remotecommand.TerminalSize, 1)
+
+	monitorResizeEvents(outFd, resizeEvents, s.stopResizing)
+
+	// listen for resize events in the background
+	go func() {
+		defer runtime.HandleCrash()
+
+		for {
+			select {
+			case size, ok := <-resizeEvents:
+				if !ok {
+					return
+				}
+
+				select {
+				// try to send the size to resizeChan, but don't block
+				case s.resizeChan <- size:
+					// send successful
+				default:
+					// unable to send / no-op
+				}
+			case <-s.stopResizing:
+				return
+			}
+		}
+	}()
+}
+
+// Next returns the new terminal size after the terminal has been resized. It returns nil when
+// monitoring has been stopped.
+func (s *sizeQueue) Next() *remotecommand.TerminalSize {
+	size, ok := <-s.resizeChan
+	if !ok {
+		return nil
+	}
+	return &size
+}
+
+// stop stops the background goroutine that is monitoring for terminal resizes.
+func (s *sizeQueue) stop() {
+	close(s.stopResizing)
+}

vendor/k8s.io/kubectl/pkg/util/term/resizeevents.go

@@ -0,0 +1,61 @@
+// +build !windows
+
+/*
+Copyright 2016 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 term
+
+import (
+	"os"
+	"os/signal"
+
+	"golang.org/x/sys/unix"
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// monitorResizeEvents spawns a goroutine that waits for SIGWINCH signals (these indicate the
+// terminal has resized). After receiving a SIGWINCH, this gets the terminal size and tries to send
+// it to the resizeEvents channel. The goroutine stops when the stop channel is closed.
+func monitorResizeEvents(fd uintptr, resizeEvents chan<- remotecommand.TerminalSize, stop chan struct{}) {
+	go func() {
+		defer runtime.HandleCrash()
+
+		winch := make(chan os.Signal, 1)
+		signal.Notify(winch, unix.SIGWINCH)
+		defer signal.Stop(winch)
+
+		for {
+			select {
+			case <-winch:
+				size := GetSize(fd)
+				if size == nil {
+					return
+				}
+
+				// try to send size
+				select {
+				case resizeEvents <- *size:
+					// success
+				default:
+					// not sent
+				}
+			case <-stop:
+				return
+			}
+		}
+	}()
+}

vendor/k8s.io/kubectl/pkg/util/term/resizeevents_windows.go

@@ -0,0 +1,62 @@
+/*
+Copyright 2016 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 term
+
+import (
+	"time"
+
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+// monitorResizeEvents spawns a goroutine that periodically gets the terminal size and tries to send
+// it to the resizeEvents channel if the size has changed. The goroutine stops when the stop channel
+// is closed.
+func monitorResizeEvents(fd uintptr, resizeEvents chan<- remotecommand.TerminalSize, stop chan struct{}) {
+	go func() {
+		defer runtime.HandleCrash()
+
+		size := GetSize(fd)
+		if size == nil {
+			return
+		}
+		lastSize := *size
+
+		for {
+			// see if we need to stop running
+			select {
+			case <-stop:
+				return
+			default:
+			}
+
+			size := GetSize(fd)
+			if size == nil {
+				return
+			}
+
+			if size.Height != lastSize.Height || size.Width != lastSize.Width {
+				lastSize.Height = size.Height
+				lastSize.Width = size.Width
+				resizeEvents <- *size
+			}
+
+			// sleep to avoid hot looping
+			time.Sleep(250 * time.Millisecond)
+		}
+	}()
+}

vendor/k8s.io/kubectl/pkg/util/term/term.go

@@ -0,0 +1,110 @@
+/*
+Copyright 2016 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 term
+
+import (
+	"io"
+	"os"
+
+	"github.com/docker/docker/pkg/term"
+
+	"k8s.io/kubectl/pkg/util/interrupt"
+)
+
+// SafeFunc is a function to be invoked by TTY.
+type SafeFunc func() error
+
+// TTY helps invoke a function and preserve the state of the terminal, even if the process is
+// terminated during execution. It also provides support for terminal resizing for remote command
+// execution/attachment.
+type TTY struct {
+	// In is a reader representing stdin. It is a required field.
+	In io.Reader
+	// Out is a writer representing stdout. It must be set to support terminal resizing. It is an
+	// optional field.
+	Out io.Writer
+	// Raw is true if the terminal should be set raw.
+	Raw bool
+	// TryDev indicates the TTY should try to open /dev/tty if the provided input
+	// is not a file descriptor.
+	TryDev bool
+	// Parent is an optional interrupt handler provided to this function - if provided
+	// it will be invoked after the terminal state is restored. If it is not provided,
+	// a signal received during the TTY will result in os.Exit(0) being invoked.
+	Parent *interrupt.Handler
+
+	// sizeQueue is set after a call to MonitorSize() and is used to monitor SIGWINCH signals when the
+	// user's terminal resizes.
+	sizeQueue *sizeQueue
+}
+
+// IsTerminalIn returns true if t.In is a terminal. Does not check /dev/tty
+// even if TryDev is set.
+func (t TTY) IsTerminalIn() bool {
+	return IsTerminal(t.In)
+}
+
+// IsTerminalOut returns true if t.Out is a terminal. Does not check /dev/tty
+// even if TryDev is set.
+func (t TTY) IsTerminalOut() bool {
+	return IsTerminal(t.Out)
+}
+
+// IsTerminal returns whether the passed object is a terminal or not
+func IsTerminal(i interface{}) bool {
+	_, terminal := term.GetFdInfo(i)
+	return terminal
+}
+
+// Safe invokes the provided function and will attempt to ensure that when the
+// function returns (or a termination signal is sent) that the terminal state
+// is reset to the condition it was in prior to the function being invoked. If
+// t.Raw is true the terminal will be put into raw mode prior to calling the function.
+// If the input file descriptor is not a TTY and TryDev is true, the /dev/tty file
+// will be opened (if available).
+func (t TTY) Safe(fn SafeFunc) error {
+	inFd, isTerminal := term.GetFdInfo(t.In)
+
+	if !isTerminal && t.TryDev {
+		if f, err := os.Open("/dev/tty"); err == nil {
+			defer f.Close()
+			inFd = f.Fd()
+			isTerminal = term.IsTerminal(inFd)
+		}
+	}
+	if !isTerminal {
+		return fn()
+	}
+
+	var state *term.State
+	var err error
+	if t.Raw {
+		state, err = term.MakeRaw(inFd)
+	} else {
+		state, err = term.SaveState(inFd)
+	}
+	if err != nil {
+		return err
+	}
+	return interrupt.Chain(t.Parent, func() {
+		if t.sizeQueue != nil {
+			t.sizeQueue.stop()
+		}
+
+		term.RestoreTerminal(inFd, state)
+	}).Run(fn)
+}

vendor/k8s.io/kubectl/pkg/util/term/term_writer.go

@@ -0,0 +1,124 @@
+/*
+Copyright 2016 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 term
+
+import (
+	"io"
+	"os"
+
+	"github.com/docker/docker/pkg/term"
+	wordwrap "github.com/mitchellh/go-wordwrap"
+)
+
+type wordWrapWriter struct {
+	limit  uint
+	writer io.Writer
+}
+
+// NewResponsiveWriter creates a Writer that detects the column width of the
+// terminal we are in, and adjusts every line width to fit and use recommended
+// terminal sizes for better readability. Does proper word wrapping automatically.
+//    if terminal width >= 120 columns		use 120 columns
+//    if terminal width >= 100 columns		use 100 columns
+//    if terminal width >=  80 columns		use  80 columns
+// In case we're not in a terminal or if it's smaller than 80 columns width,
+// doesn't do any wrapping.
+func NewResponsiveWriter(w io.Writer) io.Writer {
+	file, ok := w.(*os.File)
+	if !ok {
+		return w
+	}
+	fd := file.Fd()
+	if !term.IsTerminal(fd) {
+		return w
+	}
+
+	terminalSize := GetSize(fd)
+	if terminalSize == nil {
+		return w
+	}
+
+	var limit uint
+	switch {
+	case terminalSize.Width >= 120:
+		limit = 120
+	case terminalSize.Width >= 100:
+		limit = 100
+	case terminalSize.Width >= 80:
+		limit = 80
+	}
+
+	return NewWordWrapWriter(w, limit)
+}
+
+// NewWordWrapWriter is a Writer that supports a limit of characters on every line
+// and does auto word wrapping that respects that limit.
+func NewWordWrapWriter(w io.Writer, limit uint) io.Writer {
+	return &wordWrapWriter{
+		limit:  limit,
+		writer: w,
+	}
+}
+
+func (w wordWrapWriter) Write(p []byte) (nn int, err error) {
+	if w.limit == 0 {
+		return w.writer.Write(p)
+	}
+	original := string(p)
+	wrapped := wordwrap.WrapString(original, w.limit)
+	return w.writer.Write([]byte(wrapped))
+}
+
+// NewPunchCardWriter is a NewWordWrapWriter that limits the line width to 80 columns.
+func NewPunchCardWriter(w io.Writer) io.Writer {
+	return NewWordWrapWriter(w, 80)
+}
+
+type maxWidthWriter struct {
+	maxWidth     uint
+	currentWidth uint
+	written      uint
+	writer       io.Writer
+}
+
+// NewMaxWidthWriter is a Writer that supports a limit of characters on every
+// line, but doesn't do any word wrapping automatically.
+func NewMaxWidthWriter(w io.Writer, maxWidth uint) io.Writer {
+	return &maxWidthWriter{
+		maxWidth: maxWidth,
+		writer:   w,
+	}
+}
+
+func (m maxWidthWriter) Write(p []byte) (nn int, err error) {
+	for _, b := range p {
+		if m.currentWidth == m.maxWidth {
+			m.writer.Write([]byte{'\n'})
+			m.currentWidth = 0
+		}
+		if b == '\n' {
+			m.currentWidth = 0
+		}
+		_, err := m.writer.Write([]byte{b})
+		if err != nil {
+			return int(m.written), err
+		}
+		m.written++
+		m.currentWidth++
+	}
+	return len(p), nil
+}