style(contrib/config): code style modify (#2475)

contrib/config/apollo/README.md

@@ -97,5 +97,4 @@ config := map[string]interface{}{
         }
     }
 }
-_ = config
 ```

contrib/config/apollo/apollo.go

@@ -3,15 +3,14 @@ package apollo
 import (
 	"strings"
 
-	"github.com/go-kratos/kratos/v2/config"
-	"github.com/go-kratos/kratos/v2/log"
-
 	"github.com/apolloconfig/agollo/v4"
 	"github.com/apolloconfig/agollo/v4/constant"
 	apolloConfig "github.com/apolloconfig/agollo/v4/env/config"
 	"github.com/apolloconfig/agollo/v4/extension"
 
+	"github.com/go-kratos/kratos/v2/config"
 	"github.com/go-kratos/kratos/v2/encoding"
+	"github.com/go-kratos/kratos/v2/log"
 )
 
 type apollo struct {

contrib/config/apollo/watcher.go

@@ -4,12 +4,11 @@ import (
 	"context"
 	"strings"
 
-	"github.com/go-kratos/kratos/v2/encoding"
+	"github.com/apolloconfig/agollo/v4/storage"
 
 	"github.com/go-kratos/kratos/v2/config"
+	"github.com/go-kratos/kratos/v2/encoding"
 	"github.com/go-kratos/kratos/v2/log"
-
-	"github.com/apolloconfig/agollo/v4/storage"
 )
 
 type watcher struct {

contrib/config/consul/README.md

@@ -2,20 +2,21 @@
 
 ```go
 import (
-    "github.com/go-kratos/kratos/contrib/config/consul/v2"
     "github.com/hashicorp/consul/api"
+
+    "github.com/go-kratos/kratos/contrib/config/consul/v2"
 )
-func main() {
 
+func main() {
     consulClient, err := api.NewClient(&api.Config{
-    Address: "127.0.0.1:8500",
+        Address: "127.0.0.1:8500",
     })
     if err != nil {
         panic(err)
     }
     cs, err := consul.New(consulClient, consul.WithPath("app/cart/configs/"))
-    //consul中需要标注文件后缀，kratos读取配置需要适配文件后缀
-    //The file suffix needs to be marked, and kratos needs to adapt the file suffix to read the configuration.
+    // consul中需要标注文件后缀，kratos读取配置需要适配文件后缀
+    // The file suffix needs to be marked, and kratos needs to adapt the file suffix to read the configuration.
     if err != nil {
         panic(err)
     }

contrib/config/etcd/README.md

@@ -4,10 +4,11 @@
 import (
 	"log"
 
-	cfg "github.com/go-kratos/kratos/contrib/config/etcd/v2"
-	"github.com/go-kratos/kratos/v2/config"
 	clientv3 "go.etcd.io/etcd/client/v3"
 	"google.golang.org/grpc"
+
+	cfg "github.com/go-kratos/kratos/contrib/config/etcd/v2"
+	"github.com/go-kratos/kratos/v2/config"
 )
 
 // create an etcd client

contrib/config/kubernetes/config_test.go

@@ -8,14 +8,14 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/go-kratos/kratos/v2/config"
-
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/client-go/util/homedir"
+
+	"github.com/go-kratos/kratos/v2/config"
 )
 
 const (

contrib/config/nacos/README.md

@@ -2,9 +2,10 @@
 
 ```go
 import (
-	kconfig "github.com/go-kratos/kratos/v2/config"
 	"github.com/nacos-group/nacos-sdk-go/clients"
 	"github.com/nacos-group/nacos-sdk-go/common/constant"
+
+	kconfig "github.com/go-kratos/kratos/v2/config"
 )
 
 

contrib/config/nacos/go.mod

@@ -5,6 +5,9 @@ go 1.16
 require (
 	github.com/go-kratos/kratos/v2 v2.4.0
 	github.com/nacos-group/nacos-sdk-go v1.0.9
+)
+
+require (
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 

contrib/config/polaris/README.md

@@ -2,24 +2,23 @@
 
 ```go
 import (
- "log"
-
- "github.com/polarismesh/polaris-go"
- "github.com/go-kratos/kratos/contrib/config/polaris/v2"
+	"log"
+	
+	"github.com/polarismesh/polaris-go"
+	
+	"github.com/go-kratos/kratos/contrib/config/polaris/v2"
 )
 
 func main() {
+    configApi, err := polaris.NewConfigAPI()
+    if err != nil {
+    	log.Fatalln(err)
+    }
 
- configApi, err := polaris.NewConfigAPI()
- if err != nil {
-  log.Fatalln(err)
- }
-
- source, err := New(&configApi, WithNamespace("default"), WithFileGroup("default"), WithFileName("default.yaml"))
-
- if err != nil {
-  log.Fatalln(err)
- }
- source.Load()
+    source, err := New(&configApi, WithNamespace("default"), WithFileGroup("default"), WithFileName("default.yaml"))
+    if err != nil {
+    	log.Fatalln(err)
+    }
+    source.Load()
 }
 ```

contrib/config/polaris/config.go

@@ -6,9 +6,9 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/go-kratos/kratos/v2/config"
-
 	"github.com/polarismesh/polaris-go"
+
+	"github.com/go-kratos/kratos/v2/config"
 )
 
 // Option is polaris config option.

contrib/config/polaris/watcher.go

@@ -5,11 +5,11 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/go-kratos/kratos/v2/config"
-	"github.com/go-kratos/kratos/v2/log"
-
 	"github.com/polarismesh/polaris-go"
 	"github.com/polarismesh/polaris-go/pkg/model"
+
+	"github.com/go-kratos/kratos/v2/config"
+	"github.com/go-kratos/kratos/v2/log"
 )
 
 type Watcher struct {
@@ -28,7 +28,7 @@ func getFullPath(namespace string, fileGroup string, fileName string) string {
 	return fmt.Sprintf("%s/%s/%s", namespace, fileGroup, fileName)
 }
 
-func recieve(event model.ConfigFileChangeEvent) {
+func receive(event model.ConfigFileChangeEvent) {
 	meta := event.ConfigFileMetadata
 	ec := eventChanMap[getFullPath(meta.GetNamespace(), meta.GetFileGroup(), meta.GetFileName())]
 	defer func() {
@@ -42,7 +42,7 @@ func recieve(event model.ConfigFileChangeEvent) {
 }
 
 func newWatcher(configFile polaris.ConfigFile) *Watcher {
-	configFile.AddChangeListener(recieve)
+	configFile.AddChangeListener(receive)
 
 	fullPath := getFullPath(configFile.GetNamespace(), configFile.GetFileGroup(), configFile.GetFileName())
 	if _, ok := eventChanMap[fullPath]; !ok {