Merge pull request #2345 from yugui/lint/api

Fixes golint errors in pkg/api.

pkg/api/errors/validation.go

@@ -52,6 +52,7 @@ const (
 	ValidationErrorTypeForbidden ValidationErrorType = "FieldValueForbidden"
 )
 
+// ValueOf converts a ValidationErrorType into its corresponding error message.
 func ValueOf(t ValidationErrorType) string {
 	switch t {
 	case ValidationErrorTypeNotFound:

pkg/api/latest/latest.go

@@ -52,13 +52,13 @@ var accessor = meta.NewAccessor()
 // ResourceVersioner describes a default versioner that can handle all types
 // of versioning.
 // TODO: when versioning changes, make this part of each API definition.
-var ResourceVersioner runtime.ResourceVersioner = accessor
+var ResourceVersioner = runtime.ResourceVersioner(accessor)
 
 // SelfLinker can set or get the SelfLink field of all API types.
 // TODO: when versioning changes, make this part of each API definition.
 // TODO(lavalamp): Combine SelfLinker & ResourceVersioner interfaces, force all uses
 // to go through the InterfacesFor method below.
-var SelfLinker runtime.SelfLinker = accessor
+var SelfLinker = runtime.SelfLinker(accessor)
 
 // RESTMapper provides the default mapping between REST paths and the objects declared in api.Scheme and all known
 // Kubernetes versions.

pkg/api/meta/meta_test.go

@@ -471,7 +471,7 @@ func TestTypeMetaSelfLinker(t *testing.T) {
 		},
 	}
 
-	var linker runtime.SelfLinker = NewAccessor()
+	linker := runtime.SelfLinker(NewAccessor())
 	for name, item := range table {
 		got, err := linker.SelfLink(item.obj)
 		if e, a := item.succeed, err == nil; e != a {

pkg/api/meta/restmapper.go

@@ -30,7 +30,7 @@ type typeMeta struct {
 	Kind       string
 }
 
-// RESTMapper exposes mappings between the types defined in a
+// DefaultRESTMapper exposes mappings between the types defined in a
 // runtime.Scheme. It assumes that all types defined the provided scheme
 // can be mapped with the provided MetadataAccessor and Codec interfaces.
 //
@@ -132,7 +132,7 @@ func (m *DefaultRESTMapper) RESTMapping(version, kind string) (*RESTMapping, err
 			}
 		}
 		if len(version) == 0 {
-			return nil, fmt.Errorf("no object named %q is registered.", kind)
+			return nil, fmt.Errorf("no object named %q is registered", kind)
 		}
 	}
 

pkg/api/ref.go

@@ -25,6 +25,7 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
 )
 
+// ErrNilObject indicates an error that the obj passed to GetReference is nil.
 var ErrNilObject = errors.New("Can't reference a nil object")
 
 var versionFromSelfLink = regexp.MustCompile("/api/([^/]*)/")
@@ -72,6 +73,6 @@ func GetPartialReference(obj runtime.Object, fieldPath string) (*ObjectReference
 	return ref, nil
 }
 
-// Allow clients to preemptively get a reference to an API object and pass it to places that
+// IsAnAPIObject allows clients to preemptively get a reference to an API object and pass it to places that
 // intend only to get a reference to that object. This simplifies the event recording interface.
 func (*ObjectReference) IsAnAPIObject() {}

pkg/api/register.go

@@ -20,6 +20,7 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
 )
 
+// Scheme is the default instance of runtime.Scheme to which types in the Kubernetes API are already registered.
 var Scheme = runtime.NewScheme()
 
 func init() {

pkg/api/serialization_test.go

@@ -160,22 +160,21 @@ func runTest(t *testing.T, codec runtime.Codec, source runtime.Object) {
 	if err != nil {
 		t.Errorf("%v: %v", name, err)
 		return
-	} else {
-		if !reflect.DeepEqual(source, obj2) {
-			t.Errorf("1: %v: diff: %v\nCodec: %v\nData: %s\nSource: %#v", name, util.ObjectDiff(source, obj2), codec, string(data), source)
-			return
-		}
 	}
+	if !reflect.DeepEqual(source, obj2) {
+		t.Errorf("1: %v: diff: %v\nCodec: %v\nData: %s\nSource: %#v", name, util.ObjectDiff(source, obj2), codec, string(data), source)
+		return
+	}
+
 	obj3 := reflect.New(reflect.TypeOf(source).Elem()).Interface().(runtime.Object)
 	err = codec.DecodeInto(data, obj3)
 	if err != nil {
 		t.Errorf("2: %v: %v", name, err)
 		return
-	} else {
-		if !reflect.DeepEqual(source, obj3) {
-			t.Errorf("3: %v: diff: %v\nCodec: %v", name, util.ObjectDiff(source, obj3), codec)
-			return
-		}
+	}
+	if !reflect.DeepEqual(source, obj3) {
+		t.Errorf("3: %v: diff: %v\nCodec: %v", name, util.ObjectDiff(source, obj3), codec)
+		return
 	}
 }
 

pkg/api/types.go

@@ -136,8 +136,9 @@ type Volume struct {
 	Source *VolumeSource `json:"source" yaml:"source"`
 }
 
+// VolumeSource represents the source location of a valume to mount.
+// Only one of its members may be specified.
 type VolumeSource struct {
-	// Only one of the following sources may be specified
 	// HostDir represents a pre-existing directory on the host machine that is directly
 	// exposed to the container. This is generally used for system agents or other privileged
 	// things that are allowed to see the host machine. Most containers will NOT need this.
@@ -170,7 +171,8 @@ const (
 	ProtocolUDP Protocol = "UDP"
 )
 
-// GCEPersistent Disk resource.
+// GCEPersistentDisk represents a Persistent Disk resource in Google Compute Engine.
+//
 // A GCE PD must exist and be formatted before mounting to a container.
 // The disk must also be in the same GCE project and zone as the kubelet.
 // A GCE PD can only be mounted as read/write once.
@@ -275,11 +277,11 @@ type LivenessProbe struct {
 type PullPolicy string
 
 const (
-	// Always attempt to pull the latest image.  Container will fail If the pull fails.
+	// PullAlways means that kubelet always attempts to pull the latest image.  Container will fail If the pull fails.
 	PullAlways PullPolicy = "PullAlways"
-	// Never pull an image, only use a local image.  Container will fail if the image isn't present
+	// PullNever means that kubelet never pulls an image, but only uses a local image.  Container will fail if the image isn't present
 	PullNever PullPolicy = "PullNever"
-	// Pull if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
+	// PullIfNotPresent means that kubelet pulls if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
 	PullIfNotPresent PullPolicy = "PullIfNotPresent"
 )
 
@@ -373,9 +375,10 @@ type ContainerStateTerminated struct {
 	FinishedAt time.Time `json:"finishedAt,omitempty" yaml:"finishedAt,omitempty"`
 }
 
+// ContainerState holds a possible state of container.
+// Only one of its members may be specified.
+// If none of them is specified, the default one is ContainerStateWaiting.
 type ContainerState struct {
-	// Only one of the following ContainerState may be specified.
-	// If none of them is specified, the default one is ContainerStateWaiting.
 	Waiting     *ContainerStateWaiting    `json:"waiting,omitempty" yaml:"waiting,omitempty"`
 	Running     *ContainerStateRunning    `json:"running,omitempty" yaml:"running,omitempty"`
 	Termination *ContainerStateTerminated `json:"termination,omitempty" yaml:"termination,omitempty"`
@@ -406,10 +409,11 @@ type RestartPolicyOnFailure struct{}
 
 type RestartPolicyNever struct{}
 
+// RestartPolicy describes how the container should be restarted.
+// Only one of the following restart policies may be specified.
+// If none of the following policies is specified, the default one
+// is RestartPolicyAlways.
 type RestartPolicy struct {
-	// Only one of the following restart policies may be specified.
-	// If none of the following policies is specified, the default one
-	// is RestartPolicyAlways.
 	Always    *RestartPolicyAlways    `json:"always,omitempty" yaml:"always,omitempty"`
 	OnFailure *RestartPolicyOnFailure `json:"onFailure,omitempty" yaml:"onFailure,omitempty"`
 	Never     *RestartPolicyNever     `json:"never,omitempty" yaml:"never,omitempty"`
@@ -808,7 +812,7 @@ const (
 	// CauseTypeFieldValueNotFound is used to report failure to find a requested value
 	// (e.g. looking up an ID).
 	CauseTypeFieldValueNotFound CauseType = "FieldValueNotFound"
-	// CauseTypeFieldValueInvalid is used to report required values that are not
+	// CauseTypeFieldValueRequired is used to report required values that are not
 	// provided (e.g. empty strings, null values, or empty arrays).
 	CauseTypeFieldValueRequired CauseType = "FieldValueRequired"
 	// CauseTypeFieldValueDuplicate is used to report collisions of values that must be

pkg/api/v1beta1/types.go

@@ -80,8 +80,9 @@ type Volume struct {
 	Source *VolumeSource `yaml:"source" json:"source"`
 }
 
+// VolumeSource represents the source location of a valume to mount.
+// Only one of its members may be specified.
 type VolumeSource struct {
-	// Only one of the following sources may be specified
 	// HostDir represents a pre-existing directory on the host machine that is directly
 	// exposed to the container. This is generally used for system agents or other privileged
 	// things that are allowed to see the host machine. Most containers will NOT need this.
@@ -114,9 +115,10 @@ const (
 	ProtocolUDP Protocol = "UDP"
 )
 
-// GCEPersistent Disk resource.
-// A GCE PD must exist before mounting to a container. The disk must
-// also be in the same GCE project and zone as the kubelet.
+// GCEPersistentDisk represents a Persistent Disk resource in Google Compute Engine.
+//
+// A GCE PD must exist and be formatted before mounting to a container.
+// The disk must also be in the same GCE project and zone as the kubelet.
 // A GCE PD can only be mounted as read/write once.
 type GCEPersistentDisk struct {
 	// Unique name of the PD resource. Used to identify the disk in GCE
@@ -228,11 +230,11 @@ type LivenessProbe struct {
 type PullPolicy string
 
 const (
-	// Always attempt to pull the latest image.  Container will fail If the pull fails.
+	// PullAlways means that kubelet always attempts to pull the latest image.  Container will fail If the pull fails.
 	PullAlways PullPolicy = "PullAlways"
-	// Never pull an image, only use a local image.  Container will fail if the image isn't present
+	// PullNever means that kubelet never pulls an image, but only uses a local image.  Container will fail if the image isn't present
 	PullNever PullPolicy = "PullNever"
-	// Pull if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
+	// PullIfNotPresent means that kubelet pulls if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
 	PullIfNotPresent PullPolicy = "PullIfNotPresent"
 )
 
@@ -337,9 +339,10 @@ type ContainerStateTerminated struct {
 	FinishedAt time.Time `json:"finishedAt,omitempty" yaml:"finishedAt,omitempty"`
 }
 
+// ContainerState holds a possible state of container.
+// Only one of its members may be specified.
+// If none of them is specified, the default one is ContainerStateWaiting.
 type ContainerState struct {
-	// Only one of the following ContainerState may be specified.
-	// If none of them is specified, the default one is ContainerStateWaiting.
 	Waiting     *ContainerStateWaiting    `json:"waiting,omitempty" yaml:"waiting,omitempty"`
 	Running     *ContainerStateRunning    `json:"running,omitempty" yaml:"running,omitempty"`
 	Termination *ContainerStateTerminated `json:"termination,omitempty" yaml:"termination,omitempty"`
@@ -657,7 +660,7 @@ const (
 	// CauseTypeFieldValueNotFound is used to report failure to find a requested value
 	// (e.g. looking up an ID).
 	CauseTypeFieldValueNotFound CauseType = "FieldValueNotFound"
-	// CauseTypeFieldValueInvalid is used to report required values that are not
+	// CauseTypeFieldValueRequired is used to report required values that are not
 	// provided (e.g. empty strings, null values, or empty arrays).
 	CauseTypeFieldValueRequired CauseType = "FieldValueRequired"
 	// CauseTypeFieldValueDuplicate is used to report collisions of values that must be

pkg/api/v1beta2/types.go

@@ -56,8 +56,9 @@ type Volume struct {
 	Source *VolumeSource `yaml:"source" json:"source"`
 }
 
+// VolumeSource represents the source location of a valume to mount.
+// Only one of its members may be specified.
 type VolumeSource struct {
-	// Only one of the following sources may be specified
 	// HostDir represents a pre-existing directory on the host machine that is directly
 	// exposed to the container. This is generally used for system agents or other privileged
 	// things that are allowed to see the host machine. Most containers will NOT need this.
@@ -105,9 +106,10 @@ type Port struct {
 	HostIP string `yaml:"hostIP,omitempty" json:"hostIP,omitempty"`
 }
 
-// GCEPersistent Disk resource.
-// A GCE PD must exist before mounting to a container. The disk must
-// also be in the same GCE project and zone as the kubelet.
+// GCEPersistentDisk represents a Persistent Disk resource in Google Compute Engine.
+//
+// A GCE PD must exist and be formatted before mounting to a container.
+// The disk must also be in the same GCE project and zone as the kubelet.
 // A GCE PD can only be mounted as read/write once.
 type GCEPersistentDisk struct {
 	// Unique name of the PD resource. Used to identify the disk in GCE
@@ -194,11 +196,11 @@ type LivenessProbe struct {
 type PullPolicy string
 
 const (
-	// Always attempt to pull the latest image.  Container will fail If the pull fails.
+	// PullAlways means that kubelet always attempts to pull the latest image.  Container will fail If the pull fails.
 	PullAlways PullPolicy = "PullAlways"
-	// Never pull an image, only use a local image.  Container will fail if the image isn't present
+	// PullNever means that kubelet never pulls an image, but only uses a local image.  Container will fail if the image isn't present
 	PullNever PullPolicy = "PullNever"
-	// Pull if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
+	// PullIfNotPresent means that kubelet pulls if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
 	PullIfNotPresent PullPolicy = "PullIfNotPresent"
 )
 
@@ -302,9 +304,10 @@ type ContainerStateTerminated struct {
 	FinishedAt time.Time `json:"finishedAt,omitempty" yaml:"finishedAt,omitempty"`
 }
 
+// ContainerState holds a possible state of container.
+// Only one of its members may be specified.
+// If none of them is specified, the default one is ContainerStateWaiting.
 type ContainerState struct {
-	// Only one of the following ContainerState may be specified.
-	// If none of them is specified, the default one is ContainerStateWaiting.
 	Waiting     *ContainerStateWaiting    `json:"waiting,omitempty" yaml:"waiting,omitempty"`
 	Running     *ContainerStateRunning    `json:"running,omitempty" yaml:"running,omitempty"`
 	Termination *ContainerStateTerminated `json:"termination,omitempty" yaml:"termination,omitempty"`
@@ -632,7 +635,7 @@ const (
 	// CauseTypeFieldValueNotFound is used to report failure to find a requested value
 	// (e.g. looking up an ID).
 	CauseTypeFieldValueNotFound CauseType = "FieldValueNotFound"
-	// CauseTypeFieldValueInvalid is used to report required values that are not
+	// CauseTypeFieldValueRequired is used to report required values that are not
 	// provided (e.g. empty strings, null values, or empty arrays).
 	CauseTypeFieldValueRequired CauseType = "FieldValueRequired"
 	// CauseTypeFieldValueDuplicate is used to report collisions of values that must be

pkg/api/v1beta3/types.go

@@ -166,8 +166,9 @@ type Volume struct {
 	Source *VolumeSource `json:"source" yaml:"source"`
 }
 
+// VolumeSource represents the source location of a valume to mount.
+// Only one of its members may be specified.
 type VolumeSource struct {
-	// Only one of the following sources may be specified
 	// HostDir represents a pre-existing directory on the host machine that is directly
 	// exposed to the container. This is generally used for system agents or other privileged
 	// things that are allowed to see the host machine. Most containers will NOT need this.
@@ -200,7 +201,8 @@ const (
 	ProtocolUDP Protocol = "UDP"
 )
 
-// GCEPersistent Disk resource.
+// GCEPersistentDisk represents a Persistent Disk resource in Google Compute Engine.
+//
 // A GCE PD must exist and be formatted before mounting to a container.
 // The disk must also be in the same GCE project and zone as the kubelet.
 // A GCE PD can only be mounted as read/write once.
@@ -306,11 +308,11 @@ type LivenessProbe struct {
 type PullPolicy string
 
 const (
-	// Always attempt to pull the latest image.  Container will fail If the pull fails.
+	// PullAlways means that kubelet always attempts to pull the latest image.  Container will fail If the pull fails.
 	PullAlways PullPolicy = "PullAlways"
-	// Never pull an image, only use a local image.  Container will fail if the image isn't present
+	// PullNever means that kubelet never pulls an image, but only uses a local image.  Container will fail if the image isn't present
 	PullNever PullPolicy = "PullNever"
-	// Pull if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
+	// PullIfNotPresent means that kubelet pulls if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
 	PullIfNotPresent PullPolicy = "PullIfNotPresent"
 )
 
@@ -402,9 +404,10 @@ type ContainerStateTerminated struct {
 	FinishedAt time.Time `json:"finishedAt,omitempty" yaml:"finishedAt,omitempty"`
 }
 
+// ContainerState holds a possible state of container.
+// Only one of its members may be specified.
+// If none of them is specified, the default one is ContainerStateWaiting.
 type ContainerState struct {
-	// Only one of the following ContainerState may be specified.
-	// If none of them is specified, the default one is ContainerStateWaiting.
 	Waiting     *ContainerStateWaiting    `json:"waiting,omitempty" yaml:"waiting,omitempty"`
 	Running     *ContainerStateRunning    `json:"running,omitempty" yaml:"running,omitempty"`
 	Termination *ContainerStateTerminated `json:"termination,omitempty" yaml:"termination,omitempty"`
@@ -852,7 +855,7 @@ const (
 	// CauseTypeFieldValueNotFound is used to report failure to find a requested value
 	// (e.g. looking up an ID).
 	CauseTypeFieldValueNotFound CauseType = "FieldValueNotFound"
-	// CauseTypeFieldValueInvalid is used to report required values that are not
+	// CauseTypeFieldValueRequired is used to report required values that are not
 	// provided (e.g. empty strings, null values, or empty arrays).
 	CauseTypeFieldValueRequired CauseType = "FieldValueRequired"
 	// CauseTypeFieldValueDuplicate is used to report collisions of values that must be

pkg/api/validation/validation.go

@@ -28,6 +28,7 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 )
 
+// ServiceLister is an abstract interface for testing.
 type ServiceLister interface {
 	ListServices(api.Context) (*api.ServiceList, error)
 }