ci: add golangci-lint (#675)

.github/workflows/go.yml

@@ -26,6 +26,11 @@ jobs:
         go-version: ${{ matrix.go_version }}
       id: go
 
+    - name: Set up Env
+      run: |
+        echo "GOPATH=$(go env GOPATH)" >> $GITHUB_ENV
+        echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2
 
@@ -51,6 +56,11 @@ jobs:
     - name: Build
       run: go build ./...
 
+    - name: Golangci
+      run: |
+        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.33.0
+        golangci-lint run --out-format=github-actions
+
     - name: Test
       run: go test ./... -coverprofile=coverage.txt -covermode=atomic
 
@@ -76,20 +86,6 @@ jobs:
         go-version: ${{ matrix.go_version }}
       id: go
 
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
-
-    - name: Cache dependencies
-      uses: actions/cache@v2
-      with:
-        # Cache
-        path: ~/go/pkg/mod
-        # Cache key
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-        # An ordered list of keys to use for restoring the cache if no cache hit occurred for key
-        restore-keys: |
-          ${{ runner.os }}-go-
-
     - name: Set up Env
       run: |
         echo "GOPATH=$(go env GOPATH)" >> $GITHUB_ENV

.golangci.yml

@@ -0,0 +1,138 @@
+# [index] https://github.com/golangci/golangci-lint
+# [example] https://github.com/golangci/golangci-lint/blob/master/.golangci.example.yml
+
+run:
+  tests: true   #是否包含测试文件
+  issues-exit-code: 0
+
+linters-settings:
+  # govet:
+  #   check-shadowing: true #启用了对同名变量名在函数中被隐藏的警告
+  gofmt:
+    simplify: true
+  goimports:
+    local-prefixes: "github.com/go-kratos/kratos" # 格式化代码时，本地代码单独块
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      # - style
+      # - performance
+    disabled-checks:
+      #- wrapperFunc
+      #- dupImport # https://github.com/go-critic/go-critic/issues/845
+      - commentedOutCode
+      - ifElseChain
+      - elseif
+    settings: # settings passed to gocritic
+      captLocal: # must be valid enabled check name
+        paramsOnly: true
+      # rangeValCopy:
+      #   sizeThreshold: 32
+  lll:
+    line-length: 500
+  funlen:
+    lines: 500
+    statements: 500
+  gocyclo:
+    min-complexity: 100
+
+linters:
+  disable-all: true
+  enable:
+    #  https://golangci-lint.run/usage/configuration/
+    - bodyclose         # http.resp.body 内存泄露检查
+    - deadcode          # 无用的变量声明检查
+    - depguard          # 自定义依赖包白、黑名单 控制导包
+    - dogsled           # 空白标识符的赋值检查  默认为2
+    #- dupl             # 重复代码检查
+    - errcheck          # 未判断的error返回值检查
+    - funlen            # 接口最大行数检查
+    #- gochecknoinits   # 包中定义init()函数检查
+    #- goconst          # 常量字符串检查
+    - gocritic          #
+    - gocyclo           # 代码复杂度检查
+    - gofmt             # 优化代码
+    - goimports         # 自动增加和删除包
+    - golint            # 代码风格检查
+    #- gomnd            # 参数、赋值、用例、条件、操作和返回语句检查
+    - goprintffuncname  #
+    - gosec             # 源代码安全检查
+    - gosimple          # 可以优化的代码检查 注：该工具已整合到staticcheck中
+    - govet             # 代码正确性检查
+    - ineffassign       # 无效赋值检查
+    - interfacer        # 建议接口的使用方式
+    - lll               # 行最大字符
+    - misspell          # 拼写错误检查
+    - nakedret          # 大于指定函数长度的函数的无约束返回值检查
+    - nolintlint        #
+    - rowserrcheck      # sql.Rows.Err检查
+    - scopelint         # 循环变量引用检查,排除test文件
+    - staticcheck       # 静态检查
+    - structcheck       # 结构体字段的约束条件检查
+    - stylecheck        # 代码风格检查
+    - typecheck         # 类型检查
+    - unconvert         # 类型转换检查
+    - unparam           # 未使用参数检查
+    #- unused           # 未使用变量、函数检查
+    - varcheck          # 报告exported变量和常量
+    - whitespace        # 空行检查
+
+severity:
+  # Default value is empty string.
+  # Set the default severity for issues. If severity rules are defined and the issues
+  # do not match or no severity is provided to the rule this will be the default
+  # severity applied. Severities should match the supported severity names of the
+  # selected out format.
+  # - Code climate: https://docs.codeclimate.com/docs/issues#issue-severity
+  # -   Checkstyle: https://checkstyle.sourceforge.io/property_types.html#severity
+  # -       Github: https://help.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message
+  default-severity: error
+  # The default value is false.
+  # If set to true severity-rules regular expressions become case sensitive.
+  case-sensitive: false
+  # Default value is empty list.
+  # When a list of severity rules are provided, severity information will be added to lint
+  # issues. Severity rules have the same filtering capability as exclude rules except you
+  # are allowed to specify one matcher per severity rule.
+  # Only affects out formats that support setting severity information.
+  rules:
+    - linters:
+      - dupl
+      - nakedret
+      - lll
+      - misspell
+      - goprintffuncname
+      - stylecheck
+      - deadcode
+      - whitespace
+      - unparam
+      - golint
+      - gosec
+      - staticcheck
+      - structcheck
+      - gocritic
+      - errcheck
+      - rowserrcheck
+      - unconvert
+      - gosimple
+      - rowserrcheck
+      - ineffassign
+      severity: warning
+
+issues:
+  # Excluding configuration per-path, per-linter, per-text and per-source
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - gomnd
+        - gocyclo
+        - errcheck
+        - dupl
+        - gosec
+        - scopelint
+        - interfacer
+        - govet
+    # https://github.com/go-critic/go-critic/issues/926
+    - linters:
+        - gocritic
+      text: "unnecessaryDefer:"

pkg/cache/memcache/ascii_conn_test.go

@@ -167,10 +167,8 @@ func TestASCIIConnGetMulti(t *testing.T) {
 				reply = r["get_multi_2"]
 				compareItem(t, reply, test.a[1])
 			}
-
 		})
 	}
-
 }
 
 func TestASCIIConnSet(t *testing.T) {

pkg/cache/memcache/conn.go

@@ -84,7 +84,7 @@ func Dial(network, address string, options ...DialOption) (Conn, error) {
 		return nil, pkgerr.WithStack(err)
 	}
 	pconn, err := newASCIIConn(netConn, do.readTimeout, do.writeTimeout)
-	return &conn{pconn: pconn, ed: newEncodeDecoder()}, nil
+	return &conn{pconn: pconn, ed: newEncodeDecoder()}, err
 }
 
 type conn struct {

pkg/cache/memcache/conn_test.go

@@ -5,8 +5,9 @@ import (
 	"encoding/json"
 	"testing"
 
-	test "github.com/go-kratos/kratos/pkg/cache/memcache/test"
 	"github.com/gogo/protobuf/proto"
+
+	test "github.com/go-kratos/kratos/pkg/cache/memcache/test"
 )
 
 func TestConnRaw(t *testing.T) {
@@ -120,7 +121,6 @@ func TestConnSerialization(t *testing.T) {
 						t.Fatalf("compare failed error, %v %v", tc.a.Object.(*TestObj), no)
 					}
 				}
-
 			}
 		})
 	}

pkg/cache/memcache/pool_conn_test.go

@@ -404,7 +404,6 @@ func TestNewPool(t *testing.T) {
 }
 
 func TestPool_Get(t *testing.T) {
-
 	type args struct {
 		ctx context.Context
 	}
@@ -474,7 +473,6 @@ func TestPool_Get(t *testing.T) {
 }
 
 func TestPool_Close(t *testing.T) {
-
 	type args struct {
 		ctx context.Context
 	}

pkg/cache/redis/mock.go

@@ -19,7 +19,9 @@ func (m MockErr) Err() error { return m.Error }
 func (m MockErr) Close() error { return m.Error }
 
 // Do .
-func (m MockErr) Do(commandName string, args ...interface{}) (interface{}, error) { return nil, m.Error }
+func (m MockErr) Do(commandName string, args ...interface{}) (interface{}, error) {
+	return nil, m.Error
+}
 
 // Send .
 func (m MockErr) Send(commandName string, args ...interface{}) error { return m.Error }

pkg/cache/redis/pipeline.go

@@ -51,7 +51,6 @@ type cmd struct {
 
 func (p *pipeliner) Send(commandName string, args ...interface{}) {
 	p.cmds = append(p.cmds, &cmd{commandName: commandName, args: args})
-	return
 }
 
 func (p *pipeliner) Exec(ctx context.Context) (rs *Replies, err error) {
@@ -64,7 +63,7 @@ func (p *pipeliner) Exec(ctx context.Context) (rs *Replies, err error) {
 	for len(p.cmds) > 0 {
 		cmd := p.cmds[0]
 		p.cmds = p.cmds[1:]
-		if err := c.Send(cmd.commandName, cmd.args...); err != nil {
+		if err = c.Send(cmd.commandName, cmd.args...); err != nil {
 			p.cmds = p.cmds[:0]
 			return nil, err
 		}

pkg/cache/redis/pool_test.go

@@ -128,7 +128,6 @@ func TestPoolReuse(t *testing.T) {
 		c2.Do("PING")
 		c1.Close()
 		c2.Close()
-
 	}
 
 	d.check("before close", p, 2, 2)

pkg/cache/redis/redis_test.go

@@ -219,7 +219,6 @@ func TestRedis_Do(t *testing.T) {
 }
 
 func TestRedis_Conn(t *testing.T) {
-
 	type args struct {
 		ctx context.Context
 	}

pkg/cache/redis/scan.go

@@ -326,7 +326,6 @@ var (
 )
 
 func structSpecForType(t reflect.Type) *structSpec {
-
 	structSpecMutex.RLock()
 	ss, found := structSpecCache[t]
 	structSpecMutex.RUnlock()

pkg/cache/redis/scan_test.go

@@ -171,7 +171,6 @@ var scanStructTests = []struct {
 
 func TestScanStruct(t *testing.T) {
 	for _, tt := range scanStructTests {
-
 		var reply []interface{}
 		for _, v := range tt.reply {
 			reply = append(reply, []byte(v))
@@ -280,7 +279,6 @@ var scanSliceTests = []struct {
 
 func TestScanSlice(t *testing.T) {
 	for _, tt := range scanSliceTests {
-
 		typ := reflect.ValueOf(tt.dest).Type()
 		dest := reflect.New(typ)
 
@@ -417,7 +415,6 @@ func ExampleArgs() {
 	}
 
 	for _, id := range []string{"id1", "id2"} {
-
 		v, err := Values(c.Do("HGETALL", id))
 		if err != nil {
 			fmt.Println(err)

pkg/cache/redis/script_test.go

@@ -99,5 +99,4 @@ func TestScript(t *testing.T) {
 	if !reflect.DeepEqual(v, reply) {
 		t.Errorf("s.Send(c, ..); c.Receive() = %v, want %v", v, reply)
 	}
-
 }

pkg/cache/redis/trace_test.go

@@ -6,11 +6,12 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-kratos/kratos/pkg/net/trace"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/go-kratos/kratos/pkg/net/trace"
 )
 
-const testTraceSlowLogThreshold = time.Duration(250 * time.Millisecond)
+const testTraceSlowLogThreshold = 250 * time.Millisecond
 
 type mockTrace struct {
 	tags          []trace.Tag
@@ -181,7 +182,7 @@ func BenchmarkTraceConn(b *testing.B) {
 		t := &traceConn{
 			Conn:             c,
 			connTags:         []trace.Tag{trace.TagString(trace.TagPeerAddress, "abc")},
-			slowLogThreshold: time.Duration(1 * time.Second),
+			slowLogThreshold: 1 * time.Second,
 		}
 		c2 := t.WithContext(context.TODO())
 		if _, err := c2.Do("PING"); err != nil {
@@ -199,7 +200,7 @@ func TestTraceConnPending(t *testing.T) {
 	tc := &traceConn{
 		Conn:             c,
 		connTags:         []trace.Tag{trace.TagString(trace.TagPeerAddress, "abc")},
-		slowLogThreshold: time.Duration(1 * time.Second),
+		slowLogThreshold: 1 * time.Second,
 	}
 	err = tc.Send("SET", "a", "x")
 	if err != nil {

pkg/conf/env/env.go

@@ -28,9 +28,9 @@ const (
 
 // env configuration.
 var (
-	// Region avaliable region where app at.
+	// Region available region where app at.
 	Region string
-	// Zone avaliable zone where app at.
+	// Zone available zone where app at.
 	Zone string
 	// Hostname machine hostname.
 	Hostname string
@@ -59,8 +59,8 @@ func init() {
 
 func addFlag(fs *flag.FlagSet) {
 	// env
-	fs.StringVar(&Region, "region", defaultString("REGION", _region), "avaliable region. or use REGION env variable, value: sh etc.")
-	fs.StringVar(&Zone, "zone", defaultString("ZONE", _zone), "avaliable zone. or use ZONE env variable, value: sh001/sh002 etc.")
+	fs.StringVar(&Region, "region", defaultString("REGION", _region), "available region. or use REGION env variable, value: sh etc.")
+	fs.StringVar(&Zone, "zone", defaultString("ZONE", _zone), "available zone. or use ZONE env variable, value: sh001/sh002 etc.")
 	fs.StringVar(&AppID, "appid", os.Getenv("APP_ID"), "appid is global unique application id, register by service tree. or use APP_ID env variable.")
 	fs.StringVar(&DeployEnv, "deploy.env", defaultString("DEPLOY_ENV", _deployEnv), "deploy env. or use DEPLOY_ENV env variable, value: dev/fat1/uat/pre/prod etc.")
 	fs.StringVar(&Color, "deploy.color", os.Getenv("DEPLOY_COLOR"), "deploy.color is the identification of different experimental group.")

pkg/conf/paladin/apollo/internal/mockserver/mockserver.go

@@ -65,8 +65,8 @@ func (s *mockServer) ConfigHandler(rw http.ResponseWriter, req *http.Request) {
 	var namespace, releaseKey = strings.Split(strs[4], "?")[0], req.FormValue("releaseKey")
 	config := s.Get(namespace)
 
-	var result = result{NamespaceName: namespace, Configurations: config, ReleaseKey: releaseKey}
-	bts, err := json.Marshal(&result)
+	ret := result{NamespaceName: namespace, Configurations: config, ReleaseKey: releaseKey}
+	bts, err := json.Marshal(&ret)
 	if err != nil {
 		rw.WriteHeader(http.StatusInternalServerError)
 		return

pkg/conf/paladin/file.go

@@ -87,7 +87,7 @@ func loadValue(fpath string) (*Value, error) {
 // conf = /data/conf/app/
 // conf = /data/conf/app/xxx.toml
 func NewFile(base string) (Client, error) {
-	// paltform slash
+	// platform slash
 	base = filepath.FromSlash(base)
 
 	paths, err := readAllPaths(base)

pkg/conf/paladin/value_test.go

@@ -36,7 +36,7 @@ func TestValue(t *testing.T) {
 			"text",
 		},
 		{
-			time.Duration(time.Second * 10),
+			time.Second * 10,
 			"10s",
 		},
 		{

pkg/container/group/group.go

@@ -18,7 +18,7 @@ func NewGroup(new func() interface{}) *Group {
 		panic("container.group: can't assign a nil to the new function")
 	}
 	return &Group{
-		new: new,
+		new:  new,
 		objs: make(map[string]interface{}),
 	}
 }

pkg/container/group/group_test.go

@@ -21,7 +21,6 @@ func TestGroupGet(t *testing.T) {
 	v = g.Get("/x/internal/dummy/user")
 	assert.Equal(t, 1, v.(int))
 	assert.Equal(t, 2, count)
-
 }
 
 func TestGroupReset(t *testing.T) {
@@ -36,7 +35,7 @@ func TestGroupReset(t *testing.T) {
 	})
 
 	length := 0
-	for _,_ = range g.objs {
+	for range g.objs {
 		length++
 	}
 
@@ -52,16 +51,15 @@ func TestGroupClear(t *testing.T) {
 	})
 	g.Get("/x/internal/dummy/user")
 	length := 0
-	for _,_ = range g.objs {
+	for range g.objs {
 		length++
 	}
 	assert.Equal(t, 1, length)
 
 	g.Clear()
 	length = 0
-	for _,_ = range g.objs {
+	for range g.objs {
 		length++
 	}
 	assert.Equal(t, 0, length)
-
 }

pkg/container/pool/list_test.go

@@ -139,7 +139,7 @@ func TestListPoolExhausted(t *testing.T) {
 	conn, err := pool.Get(context.TODO())
 	assert.Nil(t, err)
 	_, err = pool.Get(ctx)
-	// config active == 1, so no avaliable conns make connection exhausted.
+	// config active == 1, so no available conns make connection exhausted.
 	assert.NotNil(t, err)
 	pool.Put(context.TODO(), conn, false)
 	_, err = pool.Get(ctx)

pkg/container/pool/slice_test.go

@@ -167,7 +167,7 @@ func TestSlicePoolExhausted(t *testing.T) {
 	conn, err := pool.Get(context.TODO())
 	assert.Nil(t, err)
 	_, err = pool.Get(ctx)
-	// config active == 1, so no avaliable conns make connection exhausted.
+	// config active == 1, so no available conns make connection exhausted.
 	assert.NotNil(t, err)
 	pool.Put(context.TODO(), conn, false)
 	_, err = pool.Get(ctx)

pkg/container/queue/aqm/codel_test.go

@@ -36,7 +36,6 @@ func TestCoDel200(t *testing.T) {
 	testPush(q, qps, delay, drop, tm)
 	fmt.Printf("qps %v process time %v drop %d timeout %d \n", int64(time.Second/qps), delay, *drop, *tm)
 	time.Sleep(time.Second)
-
 }
 
 func TestCoDel100(t *testing.T) {
@@ -46,7 +45,6 @@ func TestCoDel100(t *testing.T) {
 	delay := time.Millisecond * 1000
 	testPush(q, qps, delay, drop, tm)
 	fmt.Printf("qps %v process time %v drop %d timeout %d \n", int64(time.Second/qps), delay, *drop, *tm)
-
 }
 
 func TestCoDel50(t *testing.T) {

pkg/database/hbase/hbase.go

@@ -285,7 +285,7 @@ func (c *Client) Ping(ctx context.Context) (err error) {
 	if c.config.TestRowKey != "" {
 		testRowKey = c.config.TestRowKey
 	}
-	values := map[string]map[string][]byte{"test": map[string][]byte{"test": []byte("test")}}
+	values := map[string]map[string][]byte{"test": {"test": []byte("test")}}
 	_, err = c.PutStr(ctx, "test", testRowKey, values)
 	return
 }

pkg/log/internal/filewriter/option.go

@@ -59,7 +59,7 @@ func MaxSize(n int64) Option {
 	}
 }
 
-// ChanSize set internal chan size default 8192 use about 64k memory on x64 platfrom static,
+// ChanSize set internal chan size default 8192 use about 64k memory on x64 platform static,
 // because filewriter has internal object pool, change chan size bigger may cause filewriter use
 // a lot of memory, because sync.Pool can't set expire time memory won't free until program exit.
 func ChanSize(n int) Option {

pkg/log/log_test.go

@@ -92,7 +92,6 @@ func TestLogWithMirror(t *testing.T) {
 	Infov(mdcontext, KV("key1", "val1"), KV("key2", ""), KV("log", "log content"), KV("msg", "msg content"))
 
 	Infov(context.Background(), KV("key1", "val1"), KV("key2", ""), KV("log", "log content"), KV("msg", "msg content"))
-
 }
 
 func TestOverwriteSouce(t *testing.T) {

pkg/log/pattern.go

@@ -62,7 +62,7 @@ type pattern struct {
 	bufPool sync.Pool
 }
 
-// Render implemet Formater
+// Render implements Formater
 func (p *pattern) Render(w io.Writer, d map[string]interface{}) error {
 	builder := p.bufPool.Get().(*strings.Builder)
 	defer func() {
@@ -77,7 +77,7 @@ func (p *pattern) Render(w io.Writer, d map[string]interface{}) error {
 	return err
 }
 
-// Render implemet Formater as string
+// Render implements Formater as string
 func (p *pattern) RenderString(d map[string]interface{}) string {
 	builder := p.bufPool.Get().(*strings.Builder)
 	defer func() {

pkg/naming/etcd/etcd.go

@@ -12,11 +12,12 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/go-kratos/kratos/pkg/log"
-	"github.com/go-kratos/kratos/pkg/naming"
 	"go.etcd.io/etcd/clientv3"
 	"go.etcd.io/etcd/mvcc/mvccpb"
 	"google.golang.org/grpc"
+
+	"github.com/go-kratos/kratos/pkg/log"
+	"github.com/go-kratos/kratos/pkg/naming"
 )
 
 var (
@@ -155,7 +156,6 @@ func (e *EtcdBuilder) Build(appid string, opts ...naming.BuildOpt) naming.Resolv
 // Scheme return etcd's scheme
 func (e *EtcdBuilder) Scheme() string {
 	return "etcd"
-
 }
 
 // Register is register instance
@@ -185,7 +185,6 @@ func (e *EtcdBuilder) Register(ctx context.Context, ins *naming.Instance) (cance
 	})
 
 	go func() {
-
 		ticker := time.NewTicker(time.Duration(registerTTL/3) * time.Second)
 		defer ticker.Stop()
 		for {
@@ -270,7 +269,6 @@ func (a *appInfo) fetchstore(appID string) (err error) {
 	return nil
 }
 func (a *appInfo) store(ins *naming.InstancesInfo) {
-
 	a.ins.Store(ins)
 	a.e.mutex.RLock()
 	for rs := range a.resolver {
@@ -284,7 +282,7 @@ func (a *appInfo) store(ins *naming.InstancesInfo) {
 
 func (a *appInfo) paserIns(resp *clientv3.GetResponse) (ins *naming.InstancesInfo, err error) {
 	ins = &naming.InstancesInfo{
-		Instances: make(map[string][]*naming.Instance, 0),
+		Instances: make(map[string][]*naming.Instance),
 	}
 	for _, ev := range resp.Kvs {
 		in := new(naming.Instance)

pkg/naming/opt.go

@@ -73,7 +73,7 @@ func Filter(schema string, clusters map[string]struct{}) BuildOpt {
 
 func defulatSubset(inss []*Instance, size int) []*Instance {
 	backends := inss
-	if len(backends) <= int(size) {
+	if len(backends) <= size {
 		return backends
 	}
 	clientID := env.Hostname
@@ -93,7 +93,7 @@ func defulatSubset(inss []*Instance, size int) []*Instance {
 		backends[i], backends[j] = backends[j], backends[i]
 	})
 	start := (id % uint64(count)) * uint64(size)
-	return backends[int(start) : int(start)+int(size)]
+	return backends[int(start) : int(start)+size]
 }
 
 // Subset Subset option.
@@ -159,9 +159,7 @@ func ScheduleNode(clientZone string) BuildOpt {
 				}
 			}
 			for _, zone := range zones {
-				for _, ins := range zone.inss {
-					instances = append(instances, ins)
-				}
+				instances = append(instances, zone.inss...)
 			}
 			//如果没有拿到节点，则选择直接获取
 			if len(instances) == 0 {

pkg/naming/opt_test.go

@@ -30,36 +30,36 @@ func Test_Subset(t *testing.T) {
 
 func Test_FilterClusters(t *testing.T) {
 	inss := map[string][]*Instance{
-		"sh001": []*Instance{&Instance{
+		"sh001": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c1"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"http://127.0.0.2:9000"},
 			Metadata: map[string]string{MetaCluster: "c1"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"grpc://127.0.0.3:9000"},
 			Metadata: map[string]string{MetaCluster: "c2"},
 		}},
-		"sh002": []*Instance{&Instance{
+		"sh002": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c3"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"zk://127.0.0.2:9000"},
 			Metadata: map[string]string{MetaCluster: "c3"},
 		}},
 	}
 	res := map[string][]*Instance{
-		"sh001": []*Instance{&Instance{
+		"sh001": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c1"},
 		}},
-		"sh002": []*Instance{&Instance{
+		"sh002": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c3"},
 		}},
 	}
 	var opt BuildOptions
-	f := Filter("grpc", map[string]struct{}{"c1": struct{}{}, "c3": struct{}{}})
+	f := Filter("grpc", map[string]struct{}{"c1": {}, "c3": {}})
 	f.Apply(&opt)
 	filtered := opt.Filter(inss)
 	equal := reflect.DeepEqual(filtered, res)
@@ -70,33 +70,33 @@ func Test_FilterClusters(t *testing.T) {
 
 func Test_FilterInvalidAddr(t *testing.T) {
 	inss := map[string][]*Instance{
-		"sh001": []*Instance{&Instance{
+		"sh001": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c1"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"http://127.0.0.2:9000"},
 			Metadata: map[string]string{MetaCluster: "c1"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"grpc://127.0.0.3:9000"},
 			Metadata: map[string]string{MetaCluster: "c2"},
 		}},
-		"sh002": []*Instance{&Instance{
+		"sh002": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c3"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"zk://127.0.0.2:9000"},
 			Metadata: map[string]string{MetaCluster: "c3"},
 		}},
 	}
 	res := map[string][]*Instance{
-		"sh001": []*Instance{&Instance{
+		"sh001": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c1"},
-		}, &Instance{
+		}, {
 			Addrs:    []string{"grpc://127.0.0.3:9000"},
 			Metadata: map[string]string{MetaCluster: "c2"},
 		}},
-		"sh002": []*Instance{&Instance{
+		"sh002": {{
 			Addrs:    []string{"grpc://127.0.0.1:9000"},
 			Metadata: map[string]string{MetaCluster: "c3"},
 		}},
@@ -114,33 +114,33 @@ func Test_FilterInvalidAddr(t *testing.T) {
 func Test_Schedule(t *testing.T) {
 	app := &InstancesInfo{
 		Instances: map[string][]*Instance{
-			"sh001": []*Instance{&Instance{
+			"sh001": {{
 				Zone:     "sh001",
 				Addrs:    []string{"grpc://127.0.0.1:9000"},
 				Metadata: map[string]string{MetaCluster: "c1"},
-			}, &Instance{
+			}, {
 				Zone:     "sh001",
 				Addrs:    []string{"grpc://127.0.0.2:9000"},
 				Metadata: map[string]string{MetaCluster: "c1"},
-			}, &Instance{
+			}, {
 				Zone:     "sh001",
 				Addrs:    []string{"grpc://127.0.0.3:9000"},
 				Metadata: map[string]string{MetaCluster: "c2"},
 			}},
-			"sh002": []*Instance{&Instance{
+			"sh002": {{
 				Zone:     "sh002",
 				Addrs:    []string{"grpc://127.0.0.1:9000"},
 				Metadata: map[string]string{MetaCluster: "c3"},
-			}, &Instance{
+			}, {
 				Zone:     "sh002",
 				Addrs:    []string{"grpc://127.0.0.2:9000"},
 				Metadata: map[string]string{MetaCluster: "c3"},
 			}},
 		},
-		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": &ZoneStrategy{
+		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": {
 			Zones: map[string]*Strategy{
-				"sh001": &Strategy{10},
-				"sh002": &Strategy{20},
+				"sh001": {10},
+				"sh002": {20},
 			},
 		}}},
 	}
@@ -156,10 +156,10 @@ func Test_Schedule(t *testing.T) {
 func Test_Schedule2(t *testing.T) {
 	app := &InstancesInfo{
 		Instances: map[string][]*Instance{},
-		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": &ZoneStrategy{
+		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": {
 			Zones: map[string]*Strategy{
-				"sh001": &Strategy{10},
-				"sh002": &Strategy{20},
+				"sh001": {10},
+				"sh002": {20},
 			},
 		}}},
 	}
@@ -191,10 +191,10 @@ func Test_Schedule2(t *testing.T) {
 func Test_Schedule3(t *testing.T) {
 	app := &InstancesInfo{
 		Instances: map[string][]*Instance{},
-		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": &ZoneStrategy{
+		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": {
 			Zones: map[string]*Strategy{
-				"sh001": &Strategy{1},
-				"sh002": &Strategy{30},
+				"sh001": {1},
+				"sh002": {30},
 			},
 		}}},
 	}
@@ -226,10 +226,10 @@ func Test_Schedule3(t *testing.T) {
 func Test_Schedule4(t *testing.T) {
 	app := &InstancesInfo{
 		Instances: map[string][]*Instance{},
-		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": &ZoneStrategy{
+		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": {
 			Zones: map[string]*Strategy{
-				"sh001": &Strategy{1},
-				"sh002": &Strategy{30},
+				"sh001": {1},
+				"sh002": {30},
 			},
 		}}},
 	}
@@ -254,9 +254,9 @@ func Test_Schedule4(t *testing.T) {
 func Test_Schedule5(t *testing.T) {
 	app := &InstancesInfo{
 		Instances: map[string][]*Instance{},
-		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": &ZoneStrategy{
+		Scheduler: &Scheduler{map[string]*ZoneStrategy{"sh001": {
 			Zones: map[string]*Strategy{
-				"sh002": &Strategy{30},
+				"sh002": {30},
 			},
 		}}},
 	}

pkg/naming/zookeeper/zookeeper.go

@@ -12,10 +12,11 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/go-zookeeper/zk"
+
 	"github.com/go-kratos/kratos/pkg/log"
 	"github.com/go-kratos/kratos/pkg/naming"
 	xtime "github.com/go-kratos/kratos/pkg/time"
-	"github.com/go-zookeeper/zk"
 )
 
 // Config is zookeeper config.
@@ -80,7 +81,7 @@ func New(c *Config) (zkb *Zookeeper, err error) {
 		c.Timeout = xtime.Duration(time.Second)
 	}
 	if len(c.Endpoints) == 0 {
-		errInfo := fmt.Sprintf("zookeeper New failed, endpoints is null")
+		errInfo := "zookeeper New failed, endpoints is null"
 		log.Error(errInfo)
 		return nil, errors.New(errInfo)
 	}
@@ -90,7 +91,7 @@ func New(c *Config) (zkb *Zookeeper, err error) {
 		log.Error(fmt.Sprintf("zk Connect err:(%v)", err))
 		return
 	}
-	log.Info(fmt.Sprintf("zk Connect ok!"))
+	log.Info("zk Connect ok!")
 
 	ctx, cancel := context.WithCancel(context.Background())
 	zkb = &Zookeeper{
@@ -255,7 +256,7 @@ func (z *Zookeeper) register(ctx context.Context, ins *naming.Instance) (err err
 		if err = z.registerPeerServer(nodePath, ins); err != nil {
 			log.Warn(fmt.Sprintf("registerServer, fail to RegisterPeerServer node:%s error:(%v)", addr, err))
 		} else {
-			log.Info(fmt.Sprintf("registerServer, succeed to RegistServer node."))
+			log.Info("registerServer, succeed to RegistServer node.")
 		}
 	}
 	return nil
@@ -336,7 +337,7 @@ func (a *appInfo) fetchstore(appID string) (err error) {
 	}
 	log.Info(fmt.Sprintf("fetchstore, ok to get Children of node:(%v), childs:(%v)", prefix, childs))
 	ins := &naming.InstancesInfo{
-		Instances: make(map[string][]*naming.Instance, 0),
+		Instances: make(map[string][]*naming.Instance),
 	}
 	for _, child := range childs {
 		nodePath := prefix + "/" + child
@@ -350,7 +351,6 @@ func (a *appInfo) fetchstore(appID string) (err error) {
 			return err
 		}
 		ins.Instances[in.Zone] = append(ins.Instances[in.Zone], in)
-
 	}
 	a.store(ins)
 	return nil

pkg/net/http/blademaster/binding/binding_test.go

@@ -61,7 +61,6 @@ func TestBindingDefault(t *testing.T) {
 
 	assert.Equal(t, Default("POST", MIMEMultipartPOSTForm), Form)
 	assert.Equal(t, Default("PUT", MIMEMultipartPOSTForm), Form)
-
 }
 
 func TestStripContentType(t *testing.T) {

pkg/net/http/blademaster/render/render.go

@@ -4,7 +4,7 @@ import (
 	"net/http"
 )
 
-// Render http reponse render.
+// Render http response render.
 type Render interface {
 	// Render render it to http response writer.
 	Render(http.ResponseWriter) error

pkg/net/http/blademaster/tree.go

@@ -236,7 +236,6 @@ func (n *node) addRoute(path string, handlers []HandlerFunc) {
 				}
 				n.insertChild(numParams, path, fullPath, handlers)
 				return
-
 			} else if i == len(path) { // Make node a (in-path) leaf
 				if n.handlers != nil {
 					panic("handlers are already registered for path '" + fullPath + "'")
@@ -316,7 +315,6 @@ func (n *node) insertChild(numParams uint8, path string, fullPath string, handle
 				n.children = []*node{child}
 				n = child
 			}
-
 		} else { // catchAll
 			if end != max || numParams > 1 {
 				panic("catch-all routes are only allowed at the end of the path in path '" + fullPath + "'")
@@ -514,7 +512,7 @@ func (n *node) findCaseInsensitivePath(path string, fixTrailingSlash bool) (ciPa
 	ciPath = make([]byte, 0, len(path)+1) // preallocate enough memory
 
 	// Outer loop for walking the tree
-	for len(path) >= len(n.path) && strings.ToLower(path[:len(n.path)]) == strings.ToLower(n.path) {
+	for len(path) >= len(n.path) && strings.EqualFold(path[:len(n.path)], n.path) {
 		path = path[len(n.path):]
 		ciPath = append(ciPath, n.path...)
 
@@ -528,8 +526,8 @@ func (n *node) findCaseInsensitivePath(path string, fixTrailingSlash bool) (ciPa
 					// must use recursive approach since both index and
 					// ToLower(index) could exist. We must check both.
 					if r == unicode.ToLower(index) {
-						out, found := n.children[i].findCaseInsensitivePath(path, fixTrailingSlash)
-						if found {
+						out, _found := n.children[i].findCaseInsensitivePath(path, fixTrailingSlash)
+						if _found {
 							return append(ciPath, out...), true
 						}
 					}
@@ -618,7 +616,7 @@ func (n *node) findCaseInsensitivePath(path string, fixTrailingSlash bool) (ciPa
 			return ciPath, true
 		}
 		if len(path)+1 == len(n.path) && n.path[len(path)] == '/' &&
-			strings.ToLower(path) == strings.ToLower(n.path[:len(path)]) &&
+			strings.EqualFold(path, n.path[:len(path)]) &&
 			n.handlers != nil {
 			return append(ciPath, n.path...), true
 		}

pkg/net/metadata/key.go

@@ -39,15 +39,15 @@ const (
 )
 
 var outgoingKey = map[string]struct{}{
-	Color:       struct{}{},
-	RemoteIP:    struct{}{},
-	RemotePort:  struct{}{},
-	Mirror:      struct{}{},
-	Criticality: struct{}{},
+	Color:       {},
+	RemoteIP:    {},
+	RemotePort:  {},
+	Mirror:      {},
+	Criticality: {},
 }
 
 var incomingKey = map[string]struct{}{
-	Caller: struct{}{},
+	Caller: {},
 }
 
 // IsOutgoingKey represent this key should propagate by rpc.

pkg/net/metadata/metadata_test.go

@@ -84,7 +84,6 @@ func TestBool(t *testing.T) {
 
 	mdcontext = NewContext(context.Background(), MD{Mirror: "0"})
 	assert.Equal(t, false, Bool(mdcontext, Mirror))
-
 }
 func TestInt64(t *testing.T) {
 	mdcontext := NewContext(context.Background(), MD{Mid: int64(1)})

pkg/net/rpc/warden/balancer/p2c/p2c_test.go

@@ -191,7 +191,6 @@ func TestBalancerPick(t *testing.T) {
 			t.Fatalf("the (%d) subconn picked(%s),but expected(%s)", i, sc.addr.Addr, res[i])
 		}
 	}
-
 }
 
 func Benchmark_Wrr(b *testing.B) {
@@ -299,7 +298,6 @@ func (c *controller) updateStatics() {
 			sc.prevUsage = usage
 		}
 	}
-
 }
 
 func (c *controller) control(extraLoad, extraDelay int64) {

pkg/net/rpc/warden/balancer/wrr/wrr.go

@@ -8,11 +8,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/go-kratos/kratos/pkg/conf/env"
-	"github.com/go-kratos/kratos/pkg/log"
-	nmd "github.com/go-kratos/kratos/pkg/net/metadata"
-	wmeta "github.com/go-kratos/kratos/pkg/net/rpc/warden/internal/metadata"
-	"github.com/go-kratos/kratos/pkg/stat/metric"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/balancer"
 	"google.golang.org/grpc/balancer/base"
@@ -20,6 +15,12 @@ import (
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/resolver"
 	"google.golang.org/grpc/status"
+
+	"github.com/go-kratos/kratos/pkg/conf/env"
+	"github.com/go-kratos/kratos/pkg/log"
+	nmd "github.com/go-kratos/kratos/pkg/net/metadata"
+	wmeta "github.com/go-kratos/kratos/pkg/net/rpc/warden/internal/metadata"
+	"github.com/go-kratos/kratos/pkg/stat/metric"
 )
 
 var _ base.PickerBuilder = &wrrPickerBuilder{}
@@ -94,13 +95,13 @@ func (c *subConn) latencySummary() (latency float64, count int64) {
 
 // statistics is info for log
 type statistics struct {
-	addr     string
-	ewt      int64
-	cs       float64
-	ss       float64
+	addr    string
+	ewt     int64
+	cs      float64
+	ss      float64
 	latency float64
-	cpu      float64
-	req      int64
+	cpu     float64
+	req     int64
 }
 
 // Stats is grpc Interceptor for client to collect server stats
@@ -298,5 +299,4 @@ func (p *wrrPicker) pick(ctx context.Context, opts balancer.PickInfo) (balancer.
 		p.mu.Unlock()
 		log.Info("warden wrr(%s): %+v", conn.addr.ServerName, stats)
 	}, nil
-
 }

pkg/net/rpc/warden/client.go

@@ -179,7 +179,6 @@ func onBreaker(breaker breaker.Breaker, err *error) {
 		if ecode.EqualError(ecode.ServerErr, *err) || ecode.EqualError(ecode.ServiceUnavailable, *err) || ecode.EqualError(ecode.Deadline, *err) || ecode.EqualError(ecode.LimitExceed, *err) {
 			breaker.MarkFailed()
 			return
-
 		}
 	}
 	breaker.MarkSuccess()

pkg/net/rpc/warden/exapmle_test.go

@@ -38,7 +38,6 @@ func (s *helloServer) StreamHello(ss pb.Greeter_StreamHelloServer) error {
 		}
 	}
 	return nil
-
 }
 
 func ExampleServer() {

pkg/net/rpc/warden/internal/benchmark/bench/client/client.go

@@ -113,7 +113,6 @@ func main() {
 			}
 			wg.Done()
 		}(i)
-
 	}
 	wg.Wait()
 
@@ -140,7 +139,6 @@ func main() {
 	log.Printf("received requests_OK : %d\n", atomic.LoadUint64(&transOK))
 	log.Printf("throughput  (TPS)    : %d\n", int64(c*m)*1000/totalT)
 	log.Printf("mean: %v ms, median: %v ms, max: %v ms, min: %v ms, p99: %v ms, p999:%v ms\n", mean/1e6, median/1e6, max/1e6, min/1e6, tp99/1e6, tp999/1e6)
-
 }
 
 func prepareArgs() *proto.BenchmarkMessage {

pkg/net/rpc/warden/internal/benchmark/helloworld/client/greeter_client.go

@@ -50,7 +50,6 @@ func main() {
 	}
 	wg.Wait()
 	fmt.Printf("per request cost %v\n", all/int64(request*concurrency))
-
 }
 
 func sayHello(in *pb.HelloRequest) {

pkg/net/rpc/warden/internal/benchmark/helloworld/server/greeter_server.go

@@ -46,5 +46,4 @@ func newServer() {
 	if err != nil {
 		return
 	}
-
 }

pkg/net/rpc/warden/internal/status/status_test.go

@@ -70,7 +70,7 @@ func TestFromError(t *testing.T) {
 		gst := FromError(err)
 
 		//assert.Equal(t, codes.InvalidArgument, gst.Code())
-		// NOTE: set all grpc.status as Unkown when error is ecode.Codes for compatible
+		// NOTE: set all grpc.status as Unknown when error is ecode.Codes for compatible
 		assert.Equal(t, codes.Unknown, gst.Code())
 		// NOTE: gst.Message == str(ecode.Code) for compatible php leagcy code
 		assert.Equal(t, err.Message(), gst.Message())
@@ -93,7 +93,7 @@ func TestFromError(t *testing.T) {
 		gst := FromError(err)
 
 		//assert.Equal(t, codes.Unauthenticated, gst.Code())
-		// NOTE: set all grpc.status as Unkown when error is ecode.Codes for compatible
+		// NOTE: set all grpc.status as Unknown when error is ecode.Codes for compatible
 		assert.Equal(t, codes.Unknown, gst.Code())
 		assert.Len(t, gst.Details(), 1)
 		details := gst.Details()

pkg/net/rpc/warden/ratelimiter/ratelimiter.go

@@ -5,11 +5,12 @@ import (
 	"sync/atomic"
 	"time"
 
+	"google.golang.org/grpc"
+
 	"github.com/go-kratos/kratos/pkg/log"
 	limit "github.com/go-kratos/kratos/pkg/ratelimit"
 	"github.com/go-kratos/kratos/pkg/ratelimit/bbr"
 	"github.com/go-kratos/kratos/pkg/stat/metric"
-	"google.golang.org/grpc"
 )
 
 var (

pkg/net/rpc/warden/recovery.go

@@ -27,7 +27,7 @@ func (s *Server) recovery() grpc.UnaryServerInterceptor {
 				}
 				buf = buf[:rs]
 				pl := fmt.Sprintf("grpc server panic: %v\n%v\n%s\n", req, rerr, buf)
-				fmt.Fprintf(os.Stderr, pl)
+				fmt.Fprint(os.Stderr, pl)
 				log.Error(pl)
 				err = status.Errorf(codes.Unknown, ecode.ServerErr.Error())
 			}

pkg/net/rpc/warden/resolver/direct/direct.go

@@ -54,7 +54,7 @@ func (d *Direct) Watch() <-chan struct{} {
 func (d *Direct) Unwatch(id string) {
 }
 
-//Fetch fetch isntances.
+//Fetch fetch instances.
 func (d *Direct) Fetch(ctx context.Context) (res *naming.InstancesInfo, found bool) {
 	var ins []*naming.Instance
 	addrs := strings.Split(d.id, ",")

pkg/net/rpc/warden/resolver/resolver.go

@@ -71,7 +71,6 @@ func (b *Builder) Build(target resolver.Target, cc resolver.ClientConn, opts res
 				if t, err := strconv.ParseInt(sub[0], 10, 64); err == nil {
 					ss = t
 				}
-
 			}
 		}
 	}

pkg/net/rpc/warden/server.go

@@ -299,7 +299,7 @@ func (s *Server) RunUnix(file string) error {
 }
 
 // Start create a new goroutine run server with configured listen addr
-// will panic if any error happend
+// will panic if any error happened
 // return server itself
 func (s *Server) Start() (*Server, error) {
 	_, err := s.startWithAddr()
@@ -310,7 +310,7 @@ func (s *Server) Start() (*Server, error) {
 }
 
 // StartWithAddr create a new goroutine run server with configured listen addr
-// will panic if any error happend
+// will panic if any error happened
 // return server itself and the actually listened address (if configured listen
 // port is zero, the os will allocate an unused port)
 func (s *Server) StartWithAddr() (*Server, net.Addr, error) {

pkg/net/rpc/warden/server_test.go

@@ -336,7 +336,6 @@ func testLinkTimeout(t *testing.T) {
 	if !ecode.EqualError(ecode.Deadline, err) {
 		t.Fatalf("testLinkTimeout must return error RPCDeadline,err:%v", err)
 	}
-
 }
 func testClientConfig(t *testing.T) {
 	_, err := runClient(context.Background(), &clientConfig2, t, "timeout_test2", 0)
@@ -520,7 +519,7 @@ func BenchmarkServer(b *testing.B) {
 				b.Fatalf("c.SayHello failed: %v,req: %v %v", err, "benchmark", 1)
 			}
 			if !resp.Success {
-				b.Error("repsonse not success!")
+				b.Error("response not success!")
 			}
 		}
 	})

pkg/net/rpc/warden/validate.go

@@ -2,6 +2,7 @@ package warden
 
 import (
 	"context"
+
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 

pkg/net/trace/context.go

@@ -69,9 +69,9 @@ var emptyContext = spanContext{}
 // sample-rate: s-{base16(BigEndian(float32))}
 func (c spanContext) String() string {
 	base := make([]string, 4)
-	base[0] = strconv.FormatUint(uint64(c.TraceID), 16)
-	base[1] = strconv.FormatUint(uint64(c.SpanID), 16)
-	base[2] = strconv.FormatUint(uint64(c.ParentID), 16)
+	base[0] = strconv.FormatUint(c.TraceID, 16)
+	base[1] = strconv.FormatUint(c.SpanID, 16)
+	base[2] = strconv.FormatUint(c.ParentID, 16)
 	base[3] = strconv.FormatUint(uint64(c.Flags), 16)
 	return strings.Join(base, ":")
 }

pkg/net/trace/jaeger/http_transport.go

@@ -253,7 +253,7 @@ func buildTag(tag *Tag, maxTagValueLength int) *j.Tag {
 		jTag.VLong = &vLong
 		jTag.VType = j.TagType_LONG
 	case int64:
-		vLong := int64(value)
+		vLong := value
 		jTag.VLong = &vLong
 		jTag.VType = j.TagType_LONG
 	case uint64:
@@ -265,7 +265,7 @@ func buildTag(tag *Tag, maxTagValueLength int) *j.Tag {
 		jTag.VDouble = &vDouble
 		jTag.VType = j.TagType_DOUBLE
 	case float64:
-		vDouble := float64(value)
+		vDouble := value
 		jTag.VDouble = &vDouble
 		jTag.VType = j.TagType_DOUBLE
 	case bool:

pkg/net/trace/zipkin/zipkin.go

@@ -2,13 +2,15 @@ package zipkin
 
 import (
 	"fmt"
-	protogen "github.com/go-kratos/kratos/pkg/net/trace/proto"
 	"time"
 
-	"github.com/go-kratos/kratos/pkg/net/trace"
+	protogen "github.com/go-kratos/kratos/pkg/net/trace/proto"
+
 	"github.com/openzipkin/zipkin-go/model"
 	"github.com/openzipkin/zipkin-go/reporter"
 	"github.com/openzipkin/zipkin-go/reporter/http"
+
+	"github.com/go-kratos/kratos/pkg/net/trace"
 )
 
 type report struct {

pkg/ratelimit/bbr/bbr_test.go

@@ -9,9 +9,10 @@ import (
 	"testing"
 	"time"
 
+	"github.com/stretchr/testify/assert"
+
 	"github.com/go-kratos/kratos/pkg/ratelimit"
 	"github.com/go-kratos/kratos/pkg/stat/metric"
-	"github.com/stretchr/testify/assert"
 )
 
 func confForTest() *Config {

pkg/stat/metric/window_test.go

@@ -1,8 +1,9 @@
 package metric
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestWindowResetWindow(t *testing.T) {

pkg/sync/errgroup/example_test.go

@@ -10,12 +10,8 @@ func fakeRunTask(ctx context.Context) error {
 
 func ExampleGroup_group() {
 	g := Group{}
-	g.Go(func(context.Context) error {
-		return fakeRunTask(context.Background())
-	})
-	g.Go(func(context.Context) error {
-		return fakeRunTask(context.Background())
-	})
+	g.Go(fakeRunTask)
+	g.Go(fakeRunTask)
 	if err := g.Wait(); err != nil {
 		// handle err
 	}
@@ -23,12 +19,8 @@ func ExampleGroup_group() {
 
 func ExampleGroup_ctx() {
 	g := WithContext(context.Background())
-	g.Go(func(ctx context.Context) error {
-		return fakeRunTask(ctx)
-	})
-	g.Go(func(ctx context.Context) error {
-		return fakeRunTask(ctx)
-	})
+	g.Go(fakeRunTask)
+	g.Go(fakeRunTask)
 	if err := g.Wait(); err != nil {
 		// handle err
 	}
@@ -36,12 +28,8 @@ func ExampleGroup_ctx() {
 
 func ExampleGroup_cancel() {
 	g := WithCancel(context.Background())
-	g.Go(func(ctx context.Context) error {
-		return fakeRunTask(ctx)
-	})
-	g.Go(func(ctx context.Context) error {
-		return fakeRunTask(ctx)
-	})
+	g.Go(fakeRunTask)
+	g.Go(fakeRunTask)
 	if err := g.Wait(); err != nil {
 		// handle err
 	}
@@ -51,12 +39,8 @@ func ExampleGroup_maxproc() {
 	g := Group{}
 	// set max concurrency
 	g.GOMAXPROCS(2)
-	g.Go(func(ctx context.Context) error {
-		return fakeRunTask(context.Background())
-	})
-	g.Go(func(ctx context.Context) error {
-		return fakeRunTask(context.Background())
-	})
+	g.Go(fakeRunTask)
+	g.Go(fakeRunTask)
 	if err := g.Wait(); err != nil {
 		// handle err
 	}

tool/kratos-gen-bts/main.go

@@ -23,9 +23,9 @@ var (
 	singleFlight  = flag.Bool("singleflight", false, "enable singleflight")
 	nullCache     = flag.String("nullcache", "", "null cache")
 	checkNullCode = flag.String("check_null_code", "", "check null code")
-	cacheErr      = flag.String("cache_err", "continue", "cache err to contine or break")
+	cacheErr      = flag.String("cache_err", "continue", "cache err to continue or break")
 	batchSize     = flag.Int("batch", 0, "batch size")
-	batchErr      = flag.String("batch_err", "break", "batch err to contine or break")
+	batchErr      = flag.String("batch_err", "break", "batch err to continue or break")
 	maxGroup      = flag.Int("max_group", 0, "max group size")
 	sync          = flag.Bool("sync", false, "add cache in sync way.")
 	paging        = flag.Bool("paging", false, "use paging in single template")

tool/kratos-gen-mc/main.go

@@ -24,7 +24,7 @@ var (
 	expire        = flag.String("expire", "", "expire time code")
 	structName    = flag.String("struct_name", "dao", "struct name")
 	batchSize     = flag.Int("batch", 0, "batch size")
-	batchErr      = flag.String("batch_err", "break", "batch err to contine or break")
+	batchErr      = flag.String("batch_err", "break", "batch err to continue or break")
 	maxGroup      = flag.Int("max_group", 0, "max group size")
 	checkNullCode = flag.String("check_null_code", "", "check null code")
 	nullExpire    = flag.String("null_expire", "", "null cache expire time code")

tool/protobuf/pkg/generator/generator.go

@@ -11,13 +11,14 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
+	"github.com/pkg/errors"
+
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/gen"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/naming"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/typemap"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/utils"
-	"github.com/golang/protobuf/protoc-gen-go/descriptor"
-	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
-	"github.com/pkg/errors"
 )
 
 const Version = "v0.1"

tool/protobuf/pkg/generator/helper.go

@@ -4,11 +4,12 @@ import (
 	"reflect"
 	"strings"
 
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/extensions/gogoproto"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/tag"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/typemap"
-	"github.com/golang/protobuf/proto"
-	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 )
 
 // GetJSONFieldName get name from gogoproto.jsontag
@@ -95,7 +96,6 @@ func IsMap(field *descriptor.FieldDescriptorProto, reg *typemap.Registry) bool {
 // IsRepeated Is this field repeated?
 func IsRepeated(field *descriptor.FieldDescriptorProto) bool {
 	return field.Label != nil && *field.Label == descriptor.FieldDescriptorProto_LABEL_REPEATED
-
 }
 
 // GetFieldRequired is field required?

tool/protobuf/pkg/generator/http.go

@@ -5,11 +5,12 @@ import (
 	"net/http"
 	"strings"
 
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/tag"
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/typemap"
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 	"google.golang.org/genproto/googleapis/api/annotations"
+
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/tag"
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/typemap"
 )
 
 // HTTPInfo http info for method

tool/protobuf/pkg/naming/naming.go

@@ -6,10 +6,11 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/utils"
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 	"github.com/pkg/errors"
 	"github.com/siddontang/go/ioutil2"
+
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/utils"
 )
 
 // GetVersionPrefix 根据go包名获取api版本前缀

tool/protobuf/pkg/project/project.go

@@ -5,9 +5,10 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/utils"
 	"github.com/pkg/errors"
 	"github.com/siddontang/go/ioutil2"
+
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/utils"
 )
 
 // if proto file is inside a project (that has a /api directory)
@@ -73,6 +74,7 @@ func NewProjInfo(file string, modDirName string, modImportPath string) (projInfo
 	i := strings.Index(projInfo.AbsolutePath, modDirName)
 	if i == -1 {
 		err = errors.Errorf("project is not inside module, project=%s, module=%s", projPath, modDirName)
+		return nil, err
 	}
 	relativePath := projInfo.AbsolutePath[i+len(modDirName):]
 	projInfo.ImportPath = modImportPath + relativePath

tool/protobuf/pkg/tag/ext_tags.go

@@ -1,9 +1,10 @@
 package tag
 
 import (
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/extensions/gogoproto"
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/extensions/gogoproto"
 )
 
 func GetMoreTags(field *descriptor.FieldDescriptorProto) *string {

tool/protobuf/protoc-gen-bm/generator/generator.go

@@ -6,14 +6,15 @@ import (
 	"sort"
 	"strings"
 
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
+
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/generator"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/naming"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/tag"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/typemap"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/utils"
-	"github.com/golang/protobuf/proto"
-	"github.com/golang/protobuf/protoc-gen-go/descriptor"
-	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
 )
 
 type bm struct {
@@ -122,8 +123,7 @@ func (t *bm) generateImports(file *descriptor.FileDescriptorProto) {
 	// It's legal to import a message and use it as an input or output for a
 	// method. Make sure to import the package of any such message. First, dedupe
 	// them.
-	deps := make(map[string]string) // Map of package name to quoted import path.
-	deps = t.DeduceDeps(file)
+	deps := t.DeduceDeps(file)
 	for pkg, importPath := range deps {
 		t.P(`import `, pkg, ` `, importPath)
 	}
@@ -132,7 +132,6 @@ func (t *bm) generateImports(file *descriptor.FileDescriptorProto) {
 	t.P(`var _ *bm.Context`)
 	t.P(`var _ context.Context`)
 	t.P(`var _ binding.StructValidator`)
-
 }
 
 // Big header comments to makes it easier to visually parse a generated file.

tool/protobuf/protoc-gen-bswagger/generator.go

@@ -7,13 +7,14 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
+
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/gen"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/generator"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/naming"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/tag"
 	"github.com/go-kratos/kratos/tool/protobuf/pkg/typemap"
-	"github.com/golang/protobuf/protoc-gen-go/descriptor"
-	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
 )
 
 type swaggerGen struct {

tool/protobuf/protoc-gen-ecode/generator/generator.go

@@ -4,11 +4,12 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/generator"
-	"github.com/go-kratos/kratos/tool/protobuf/pkg/naming"
 	"github.com/golang/protobuf/proto"
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
+
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/generator"
+	"github.com/go-kratos/kratos/tool/protobuf/pkg/naming"
 )
 
 type ecode struct {