Kubectl label command accepts a filename param

contrib/completions/bash/kubectl

@@ -747,6 +747,12 @@ _kubectl_label()
     flags_completion=()
 
     flags+=("--all")
+    flags+=("--filename=")
+    flags_with_completion+=("--filename")
+    flags_completion+=("__handle_filename_extension_flag json|yaml|yml")
+    two_word_flags+=("-f")
+    flags_with_completion+=("-f")
+    flags_completion+=("__handle_filename_extension_flag json|yaml|yml")
     flags+=("--help")
     flags+=("-h")
     flags+=("--no-headers")

docs/man/man1/kubectl-label.1

@@ -26,6 +26,10 @@ If \-\-resource\-version is specified, then updates will use this resource versi
 \fB\-\-all\fP=false
     select all resources in the namespace of the specified resource types
 
+.PP
+\fB\-f\fP, \fB\-\-filename\fP=[]
+    Filename, directory, or URL to a file identifying the resource to update the labels
+
 .PP
 \fB\-h\fP, \fB\-\-help\fP=false
     help for label
@@ -176,6 +180,9 @@ $ kubectl label \-\-overwrite pods foo status=unhealthy
 # Update all pods in the namespace
 $ kubectl label pods \-\-all status=unhealthy
 
+# Update a pod identified by the type and name in "pod.json"
+$ kubectl label \-f pod.json status=unhealthy
+
 # Update pod 'foo' only if the resource is unchanged from version 1.
 $ kubectl label pods foo status=unhealthy \-\-resource\-version=1
 

docs/user-guide/kubectl/kubectl_label.md

@@ -45,7 +45,7 @@ If --overwrite is true, then existing labels can be overwritten, otherwise attem
 If --resource-version is specified, then updates will use this resource version, otherwise the existing resource-version will be used.
 
 ```
-kubectl label [--overwrite] TYPE NAME KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]
+kubectl label [--overwrite] (-f FILENAME | TYPE NAME) KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]
 ```
 
 ### Examples
@@ -60,6 +60,9 @@ $ kubectl label --overwrite pods foo status=unhealthy
 # Update all pods in the namespace
 $ kubectl label pods --all status=unhealthy
 
+# Update a pod identified by the type and name in "pod.json"
+$ kubectl label -f pod.json status=unhealthy
+
 # Update pod 'foo' only if the resource is unchanged from version 1.
 $ kubectl label pods foo status=unhealthy --resource-version=1
 
@@ -72,6 +75,7 @@ $ kubectl label pods foo bar-
 
 ```
       --all[=false]: select all resources in the namespace of the specified resource types
+  -f, --filename=[]: Filename, directory, or URL to a file identifying the resource to update the labels
   -h, --help[=false]: help for label
       --no-headers[=false]: When using the default output, don't print headers.
   -o, --output="": Output format. One of: json|yaml|template|templatefile|wide.
@@ -116,7 +120,7 @@ $ kubectl label pods foo bar-
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra at 2015-08-12 23:41:01.309176995 +0000 UTC
+###### Auto generated by spf13/cobra at 2015-08-13 02:21:16.349210188 +0000 UTC
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/user-guide/kubectl/kubectl_label.md?pixel)]()

pkg/kubectl/cmd/label.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/spf13/cobra"
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/kubectl"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
 	"k8s.io/kubernetes/pkg/runtime"
@@ -44,6 +45,9 @@ $ kubectl label --overwrite pods foo status=unhealthy
 # Update all pods in the namespace
 $ kubectl label pods --all status=unhealthy
 
+# Update a pod identified by the type and name in "pod.json"
+$ kubectl label -f pod.json status=unhealthy
+
 # Update pod 'foo' only if the resource is unchanged from version 1.
 $ kubectl label pods foo status=unhealthy --resource-version=1
 
@@ -54,7 +58,7 @@ $ kubectl label pods foo bar-`
 
 func NewCmdLabel(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	cmd := &cobra.Command{
-		Use:     "label [--overwrite] TYPE NAME KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]",
+		Use:     "label [--overwrite] (-f FILENAME | TYPE NAME) KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]",
 		Short:   "Update the labels on a resource",
 		Long:    fmt.Sprintf(label_long, util.LabelValueMaxLength),
 		Example: label_example,
@@ -68,6 +72,8 @@ func NewCmdLabel(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	cmd.Flags().StringP("selector", "l", "", "Selector (label query) to filter on")
 	cmd.Flags().Bool("all", false, "select all resources in the namespace of the specified resource types")
 	cmd.Flags().String("resource-version", "", "If non-empty, the labels update will only succeed if this is the current resource-version for the object. Only valid when specifying a single resource.")
+	usage := "Filename, directory, or URL to a file identifying the resource to update the labels"
+	kubectl.AddJsonFilenameFlag(cmd, usage)
 	return cmd
 }
 
@@ -149,7 +155,8 @@ func RunLabel(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []stri
 			return cmdutil.UsageError(cmd, "all resources must be specified before label changes: %s", s)
 		}
 	}
-	if len(resources) < 1 {
+	filenames := cmdutil.GetFlagStringSlice(cmd, "filename")
+	if len(resources) < 1 && len(filenames) == 0 {
 		return cmdutil.UsageError(cmd, "one or more resources must be specified as <resource> <name> or <resource>/<name>")
 	}
 	if len(labelArgs) < 1 {
@@ -161,7 +168,7 @@ func RunLabel(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []stri
 	overwrite := cmdutil.GetFlagBool(cmd, "overwrite")
 	resourceVersion := cmdutil.GetFlagString(cmd, "resource-version")
 
-	cmdNamespace, _, err := f.DefaultNamespace()
+	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
 	if err != nil {
 		return err
 	}
@@ -170,11 +177,11 @@ func RunLabel(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []stri
 	if err != nil {
 		return cmdutil.UsageError(cmd, err.Error())
 	}
-
 	mapper, typer := f.Object()
 	b := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
 		ContinueOnError().
 		NamespaceParam(cmdNamespace).DefaultNamespace().
+		FilenameParam(enforceNamespace, filenames...).
 		SelectorParam(selector).
 		ResourceTypeOrNameArgs(all, resources...).
 		Flatten().
@@ -185,6 +192,7 @@ func RunLabel(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []stri
 	if err := r.Err(); err != nil {
 		return err
 	}
+
 	// only apply resource version locking on a single resource
 	if !one && len(resourceVersion) > 0 {
 		return cmdutil.UsageError(cmd, "--resource-version may only be used with a single resource")

pkg/kubectl/cmd/label_test.go

@@ -323,6 +323,60 @@ func TestLabelErrors(t *testing.T) {
 	}
 }
 
+func TestLabelForResourceFromFile(t *testing.T) {
+	pods, _, _ := testData()
+
+	f, tf, codec := NewAPIFactory()
+	tf.Printer = &testPrinter{}
+
+	tf.Client = &client.FakeRESTClient{
+		Codec: codec,
+		Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
+			switch req.Method {
+			case "GET":
+				switch req.URL.Path {
+				case "/namespaces/test/pods/cassandra":
+					return &http.Response{StatusCode: 200, Body: objBody(codec, &pods.Items[0])}, nil
+				default:
+					t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
+					return nil, nil
+				}
+			case "PUT":
+				switch req.URL.Path {
+				case "/namespaces/test/pods/cassandra":
+					return &http.Response{StatusCode: 200, Body: objBody(codec, &pods.Items[0])}, nil
+				default:
+					t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
+					return nil, nil
+				}
+			default:
+				t.Fatalf("unexpected request: %s %#v\n%#v", req.Method, req.URL, req)
+				return nil, nil
+			}
+		}),
+	}
+
+	tf.Namespace = "test"
+	tf.ClientConfig = &client.Config{Version: testapi.Version()}
+
+	buf := bytes.NewBuffer([]byte{})
+	cmd := NewCmdLabel(f, buf)
+	cmd.Flags().Set("filename", "../../../examples/cassandra/cassandra.yaml")
+
+	cmd.SetOutput(buf)
+	err := RunLabel(f, buf, cmd, []string{"a=b"})
+
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if tf.Printer.(*testPrinter).Objects == nil {
+		t.Errorf("unexpected print to default printer")
+	}
+	if !reflect.DeepEqual(tf.Printer.(*testPrinter).Objects[0].(*api.Pod).Labels, map[string]string{"a": "b"}) {
+		t.Errorf("did not set labels: %#v", string(buf.Bytes()))
+	}
+}
+
 func TestLabelMultipleObjects(t *testing.T) {
 	pods, _, _ := testData()
 

pkg/kubectl/resource/builder.go

@@ -584,6 +584,10 @@ func (b *Builder) visitorResult() *Result {
 			if b.flatten {
 				visitors = NewFlattenListVisitor(visitors, b.mapper)
 			}
+			// must set namespace prior to fetching
+			if b.defaultNamespace {
+				visitors = NewDecoratedVisitor(visitors, SetNamespace(b.namespace))
+			}
 			visitors = NewDecoratedVisitor(visitors, RetrieveLatest)
 		}
 		return &Result{singular: singular, visitor: visitors, sources: b.paths}