Fix go lint error and add golint checks to a pre-commit hook

bin/pre-commit.sh

@@ -35,6 +35,10 @@ function testGoImports {
   diff -u <(echo -n) <(go_dirs | xargs -0 goimports -l)
 }
 
+function testGoLint {
+  diff -u <(echo -n) <(go_dirs | xargs -0 golint --min_confidence 0.85 )
+}
+
 function testGoVet {
   go vet -all ./...
 }
@@ -49,6 +53,7 @@ function testExamples {
 
 runTest testGoFmt
 runTest testGoImports
+runTest testGoLint
 runTest testGoVet
 runTest testGoTest
 runTest testExamples

pkg/app/application.go

@@ -35,6 +35,7 @@ import (
 	"github.com/kubernetes-sigs/kustomize/pkg/types"
 )
 
+// Application interface exposes methods to get resources of the application.
 type Application interface {
 	// Resources computes and returns the resources for the app.
 	Resources() (resmap.ResMap, error)
@@ -57,7 +58,7 @@ type applicationImpl struct {
 	loader        loader.Loader
 }
 
-// NewApp parses the kustomization file at the path using the loader.
+// New parses the kustomization file at the path using the loader and returns application.
 func New(loader loader.Loader) (Application, error) {
 	content, err := loader.Load(constants.KustomizationFileName)
 	if err != nil {

pkg/configmapandsecret/util/configmap.go

@@ -27,7 +27,7 @@ import (
 	"k8s.io/apimachinery/pkg/util/validation"
 )
 
-// handleConfigMapFromLiteralSources adds the specified literal source
+// HandleConfigMapFromLiteralSources adds the specified literal source
 // information into the provided configMap.
 func HandleConfigMapFromLiteralSources(configMap *v1.ConfigMap, literalSources []string) error {
 	for _, literalSource := range literalSources {
@@ -43,7 +43,7 @@ func HandleConfigMapFromLiteralSources(configMap *v1.ConfigMap, literalSources [
 	return nil
 }
 
-// handleConfigMapFromFileSources adds the specified file source information
+// HandleConfigMapFromFileSources adds the specified file source information
 // into the provided configMap
 func HandleConfigMapFromFileSources(configMap *v1.ConfigMap, fileSources []string) error {
 	for _, fileSource := range fileSources {
@@ -88,7 +88,7 @@ func HandleConfigMapFromFileSources(configMap *v1.ConfigMap, fileSources []strin
 	return nil
 }
 
-// handleConfigMapFromEnvFileSource adds the specified env file source information
+// HandleConfigMapFromEnvFileSource adds the specified env file source information
 // into the provided configMap
 func HandleConfigMapFromEnvFileSource(configMap *v1.ConfigMap, envFileSource string) error {
 	info, err := os.Stat(envFileSource)

pkg/configmapandsecret/util/util.go

@@ -41,6 +41,7 @@ func ParseRFC3339(s string, nowFn func() metav1.Time) (metav1.Time, error) {
 	return metav1.Time{Time: t}, nil
 }
 
+// HashObject encodes object using given codec and returns MD5 sum of the result.
 func HashObject(obj runtime.Object, codec runtime.Codec) (string, error) {
 	data, err := runtime.Encode(codec, obj)
 	if err != nil {

pkg/internal/error/configmaperror.go

@@ -19,6 +19,7 @@ package error
 
 import "fmt"
 
+// ConfigmapError represents error with a configmap.
 type ConfigmapError struct {
 	Path     string
 	ErrorMsg string

pkg/internal/error/kustomizationerror.go

@@ -20,7 +20,7 @@ import (
 	"fmt"
 )
 
-// First pass to encapsulate fields for more informative error messages.
+// KustomizationError represents an error with a kustomization.
 type KustomizationError struct {
 	KustomizationPath string
 	ErrorMsg          string
@@ -30,6 +30,7 @@ func (ke KustomizationError) Error() string {
 	return fmt.Sprintf("Kustomization File [%s]: %s\n", ke.KustomizationPath, ke.ErrorMsg)
 }
 
+// KustomizationErrors collects all errors.
 type KustomizationErrors struct {
 	kErrors []error
 }
@@ -42,14 +43,17 @@ func (ke *KustomizationErrors) Error() string {
 	return errormsg
 }
 
+// Append adds error to a collection of errors.
 func (ke *KustomizationErrors) Append(e error) {
 	ke.kErrors = append(ke.kErrors, e)
 }
 
+// Get returns all collected errors.
 func (ke *KustomizationErrors) Get() []error {
 	return ke.kErrors
 }
 
+// BatchAppend adds all errors from another KustomizationErrors
 func (ke *KustomizationErrors) BatchAppend(e KustomizationErrors) {
 	for _, err := range e.Get() {
 		ke.kErrors = append(ke.kErrors, err)

pkg/internal/error/patcherror.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 )
 
+// PatchError represents error during Patch.
 type PatchError struct {
 	KustomizationPath string
 	PatchFilepath     string

pkg/internal/error/resourceerror.go

@@ -18,7 +18,7 @@ package error
 
 import "fmt"
 
-// First pass to encapsulate fields for more informative error messages.
+// ResourceError represents error in a resource.
 type ResourceError struct {
 	KustomizationPath string
 	ResourceFilepath  string

pkg/internal/error/secreterror.go

@@ -18,9 +18,11 @@ package error
 
 import "fmt"
 
+// SecretError represents error with a secret.
 type SecretError struct {
 	KustomizationPath string
-	ErrorMsg          string
+	// ErrorMsg is an error message
+	ErrorMsg string
 }
 
 func (e SecretError) Error() string {

pkg/internal/loadertest/fakeloader.go

@@ -43,24 +43,27 @@ func NewFakeLoader(initialDir string) FakeLoader {
 	return FakeLoader{fs: fakefs, delegate: loader}
 }
 
-// Adds a fake file to the file system.
+// AddFile adds a fake file to the file system.
 func (f FakeLoader) AddFile(fullFilePath string, content []byte) error {
 	return f.fs.WriteFile(fullFilePath, content)
 }
 
-// Adds a fake directory to the file system.
+// AddDirectory adds a fake directory to the file system.
 func (f FakeLoader) AddDirectory(fullDirPath string, mode os.FileMode) error {
 	return f.fs.Mkdir(fullDirPath, mode)
 }
 
+// Root returns root.
 func (f FakeLoader) Root() string {
 	return f.delegate.Root()
 }
 
+// New creates a new loader from a new root.
 func (f FakeLoader) New(newRoot string) (loader.Loader, error) {
 	return f.delegate.New(newRoot)
 }
 
+// Load performs load from a given location.
 func (f FakeLoader) Load(location string) ([]byte, error) {
 	return f.delegate.Load(location)
 }

pkg/loader/loader.go

@@ -36,7 +36,7 @@ type loaderImpl struct {
 	schemes []SchemeLoader
 }
 
-// Interface for different types of loaders (e.g. fileLoader, httpLoader, etc.)
+// SchemeLoader is the interface for different types of loaders (e.g. fileLoader, httpLoader, etc.)
 type SchemeLoader interface {
 	// Does this location correspond to this scheme.
 	IsScheme(root string, location string) bool

pkg/resmap/resmap.go

@@ -68,19 +68,20 @@ func (m ResMap) EncodeAsYaml() ([]byte, error) {
 	return buf.Bytes(), nil
 }
 
-func (m1 ResMap) ErrorIfNotEqual(m2 ResMap) error {
-	if len(m1) != len(m2) {
+// ErrorIfNotEqual returns error if maps are not equal.
+func (m ResMap) ErrorIfNotEqual(m2 ResMap) error {
+	if len(m) != len(m2) {
 		keySet1 := []resource.ResId{}
 		keySet2 := []resource.ResId{}
-		for id := range m1 {
+		for id := range m {
 			keySet1 = append(keySet1, id)
 		}
 		for id := range m2 {
 			keySet2 = append(keySet2, id)
 		}
 		return fmt.Errorf("maps has different number of entries: %#v doesn't equals %#v", keySet1, keySet2)
 	}
-	for id, obj1 := range m1 {
+	for id, obj1 := range m {
 		obj2, found := m2[id]
 		if !found {
 			return fmt.Errorf("%#v doesn't exist in %#v", id, m2)

pkg/resource/generationbehavior.go

@@ -20,13 +20,13 @@ package resource
 type GenerationBehavior int
 
 const (
-	// Unspecified behavior typically treated as a Create.
+	// BehaviorUnspecified is an Unspecified behavior; typically treated as a Create.
 	BehaviorUnspecified GenerationBehavior = iota
-	// Make a new resource.
+	// BehaviorCreate makes a new resource.
 	BehaviorCreate
-	// Replace a resource.
+	// BehaviorReplace replaces a resource.
 	BehaviorReplace
-	// Attempt to merge a new resource with an existing resource.
+	// BehaviorMerge attempts to merge a new resource with an existing resource.
 	BehaviorMerge
 )
 

pkg/resource/resid.go

@@ -30,6 +30,7 @@ type ResId struct {
 	name string
 }
 
+// NewResId creates new resource identifier
 func NewResId(g schema.GroupVersionKind, n string) ResId {
 	return ResId{gvk: g, name: n}
 }
@@ -41,10 +42,12 @@ func (n ResId) String() string {
 	return strings.Join([]string{n.gvk.Group, n.gvk.Version, n.gvk.Kind, n.name}, "_") + ".yaml"
 }
 
+// Gvk returns Group/Version/Kind of the resource.
 func (n ResId) Gvk() schema.GroupVersionKind {
 	return n.gvk
 }
 
+// Name returns resource name.
 func (n ResId) Name() string {
 	return n.name
 }

pkg/resource/resource.go

@@ -68,11 +68,13 @@ func (r *Resource) Id() ResId {
 	return NewResId(r.GroupVersionKind(), r.GetName())
 }
 
+// Merge performs merge with other resource.
 func (r *Resource) Merge(other *Resource) {
 	r.Replace(other)
 	mergeConfigmap(r.Object, other.Object, r.Object)
 }
 
+// Replace performs replace with other resource.
 func (r *Resource) Replace(other *Resource) {
 	r.SetLabels(mergeStringMaps(other.GetLabels(), r.GetLabels()))
 	r.SetAnnotations(mergeStringMaps(other.GetAnnotations(), r.GetAnnotations()))
@@ -103,6 +105,7 @@ func mergeStringMaps(maps ...map[string]string) map[string]string {
 	return result
 }
 
+// GetFieldValue returns value at the given fieldpath.
 func (r *Resource) GetFieldValue(fieldPath string) (string, error) {
 	return getFieldValue(r.UnstructuredContent(), strings.Split(fieldPath, "."))
 }

pkg/types/kustomization.go

@@ -67,7 +67,7 @@ type Kustomization struct {
 	Vars []Var `json:"vars,omitempty" yaml:"vars,omitempty"`
 }
 
-// ConfigMapArg contains the metadata of how to generate a configmap.
+// ConfigMapArgs contains the metadata of how to generate a configmap.
 type ConfigMapArgs struct {
 	// Name of the configmap.
 	// The full name should be Kustomization.NamePrefix + Configmap.Name +
@@ -84,7 +84,7 @@ type ConfigMapArgs struct {
 	DataSources `json:",inline,omitempty" yaml:",inline,omitempty"`
 }
 
-// SecretGenerator contains the metadata of how to generate a secret.
+// SecretArgs contains the metadata of how to generate a secret.
 type SecretArgs struct {
 	// Name of the secret.
 	// The full name should be Kustomization.NamePrefix + SecretGenerator.Name +

pkg/types/var.go

@@ -40,6 +40,7 @@ type Var struct {
 	FieldRef corev1.ObjectFieldSelector `json:"fieldref,omitempty" yaml:"objref,omitempty"`
 }
 
+// Defaulting sets reference to field used by default.
 func (v *Var) Defaulting() {
 	if (corev1.ObjectFieldSelector{}) == v.FieldRef {
 		v.FieldRef = corev1.ObjectFieldSelector{FieldPath: "metadata.name"}

version/version.go

@@ -32,14 +32,21 @@ var (
 	buildDate = "1970-01-01T00:00:00Z" // build date in ISO8601 format, output of $(date -u +'%Y-%m-%dT%H:%M:%SZ')
 )
 
+// Version represens kustomize version.
 type Version struct {
+	// KustomizeVersion is a kustomize binary version.
 	KustomizeVersion string `json:"kustomizeVersion"`
-	GitCommit        string `json:"gitCommit"`
-	BuildDate        string `json:"buildDate"`
-	GoOs             string `json:"goOs"`
-	GoArch           string `json:"goArch"`
+	// GitCommit is a git commit
+	GitCommit string `json:"gitCommit"`
+	// BuildDate is a build date of the binary.
+	BuildDate string `json:"buildDate"`
+	// GoOs holds OS name.
+	GoOs string `json:"goOs"`
+	// GoArch holds architecture name.
+	GoArch string `json:"goArch"`
 }
 
+// GetVersion returns version.
 func GetVersion() Version {
 	return Version{
 		kustomizeVersion,
@@ -50,6 +57,7 @@ func GetVersion() Version {
 	}
 }
 
+// Print prints version.
 func (v Version) Print(w io.Writer) {
 	fmt.Fprintf(w, "Version: %+v\n", v)
 }