fix linting (#4)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

api/resolver/grpc/grpc.go

@@ -9,10 +9,12 @@ import (
 	"github.com/unistack-org/micro/v3/api/resolver"
 )
 
+// Resolver struct
 type Resolver struct {
 	opts resolver.Options
 }
 
+// Resolve func to resolve enndpoint
 func (r *Resolver) Resolve(req *http.Request, opts ...resolver.ResolveOption) (*resolver.Endpoint, error) {
 	// parse options
 	options := resolver.NewResolveOptions(opts...)
@@ -39,6 +41,7 @@ func (r *Resolver) String() string {
 	return "grpc"
 }
 
+// NewResolver is used to create new Resolver
 func NewResolver(opts ...resolver.Option) resolver.Resolver {
 	return &Resolver{opts: resolver.NewOptions(opts...)}
 }

api/resolver/options.go

@@ -4,11 +4,13 @@ import (
 	"github.com/unistack-org/micro/v3/registry"
 )
 
+// Options struct
 type Options struct {
 	Handler       string
 	ServicePrefix string
 }
 
+// Option func
 type Option func(o *Options)
 
 // WithHandler sets the handler being used
@@ -27,7 +29,7 @@ func WithServicePrefix(p string) Option {
 
 // NewOptions returns new initialised options
 func NewOptions(opts ...Option) Options {
-	var options Options
+	options := Options{}
 	for _, o := range opts {
 		o(&options)
 	}
@@ -51,13 +53,10 @@ func Domain(n string) ResolveOption {
 
 // NewResolveOptions returns new initialised resolve options
 func NewResolveOptions(opts ...ResolveOption) ResolveOptions {
-	var options ResolveOptions
+	options := ResolveOptions{Domain: registry.DefaultDomain}
 	for _, o := range opts {
 		o(&options)
 	}
-	if len(options.Domain) == 0 {
-		options.Domain = registry.DefaultDomain
-	}
 
 	return options
 }

api/resolver/resolver.go

@@ -7,7 +7,9 @@ import (
 )
 
 var (
-	ErrNotFound    = errors.New("not found")
+	// ErrNotFound returned when endpoint is not found
+	ErrNotFound = errors.New("not found")
+	// ErrInvalidPath returned on invalid path
 	ErrInvalidPath = errors.New("invalid path")
 )
 
@@ -19,7 +21,7 @@ type Resolver interface {
 
 // Endpoint is the endpoint for a http request
 type Endpoint struct {
-	// e.g greeter
+	// Endpoint name e.g greeter
 	Name string
 	// HTTP Host e.g example.com
 	Host string

api/server/options.go

@@ -23,6 +23,7 @@ type Options struct {
 	Wrappers     []Wrapper
 }
 
+// NewOptions returns new Options
 func NewOptions(opts ...Option) Options {
 	options := Options{}
 	for _, o := range opts {