Merge pull request 'update ling and go version' (#17) from format into master

Reviewed-on: #17

.drone.yml

@@ -5,7 +5,7 @@ name: logger
 
 steps:
 - name: test 
-  image: golang:1.21.5
+  image: golang:1.22.2
   volumes:
   - name: deps
     path: /go/src/mod
@@ -13,85 +13,10 @@ steps:
   - go test 
 
 - name: golangci-lint
-  image: golangci/golangci-lint:v1.55
+  image: golangci/golangci-lint:v1.57
   commands:
   - golangci-lint run
 
 volumes:
 - name: deps
   temp: {}
-
----
-kind: pipeline
-type: docker
-name: otel
-
-steps:
-- name: test
-  image: golang:1.21.5
-  volumes:
-  - name: deps
-    path: /go/src/mod
-  commands:
-  - cd handler/otel
-  - go test 
-
-- name: golangci-lint
-  image: golangci/golangci-lint:v1.55
-  commands:
-  - cd handler/otel
-  - golangci-lint run
-
-volumes:
-- name: deps
-  temp: {}
-
----
-kind: pipeline
-type: docker
-name: logrus
-
-steps:
-- name: test
-  image: golang:1.21.5
-  volumes:
-  - name: deps
-    path: /go/src/mod
-  commands:
-  - cd handler/logrus
-  - go test 
-
-- name: golangci-lint
-  image: golangci/golangci-lint:v1.55
-  commands:
-  - cd handler/logrus
-  - golangci-lint run
-
-volumes:
-- name: deps
-  temp: {}
-
----
-kind: pipeline
-type: docker
-name: zap
-
-steps:
-- name: test
-  image: golang:1.21.5
-  volumes:
-  - name: deps
-    path: /go/src/mod
-  commands:
-  - cd handler/zap
-  - go test
-
-- name: golangci-lint
-  image: golangci/golangci-lint:v1.55
-  commands:
-  - cd handler/zap
-  - golangci-lint run
-
-volumes:
-- name: deps
-  temp: {}

.golangci.yml

@@ -70,3 +70,7 @@ issues:
       linters:
         - lll
         - goerr113
+    - path: example/*
+      linters:
+        - gomnd
+        - lll

bench_test.go

@@ -166,7 +166,9 @@ func BenchmarkDisabledAccumulatedContext(b *testing.B) {
 
 	b.Run("4devs/log.Context", func(b *testing.B) {
 		b.ResetTimer()
+
 		logger := NewLogger().With(log.GoVersion("goversion"))
+
 		b.RunParallel(func(pb *testing.PB) {
 			for pb.Next() {
 				logger.InfoKV(ctx, getMessage(0), fakeFields()...)

entry/entry.go

@@ -161,3 +161,24 @@ func (e *Entry) AddAny(key string, value interface{}) *Entry {
 func (e *Entry) AddString(key, value string) *Entry {
 	return e.Add(field.String(key, value))
 }
+
+func (e *Entry) Replace(key string, value field.Value) *Entry {
+	has := false
+
+	e.fields.Fields(func(f field.Field) bool {
+		if f.Key == key {
+			f.Value = value
+			has = true
+
+			return false
+		}
+
+		return true
+	})
+
+	if !has {
+		e.AddAny(key, value)
+	}
+
+	return e
+}

example/log.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+	"time"
+
+	"gitoa.ru/go-4devs/log"
+	"gitoa.ru/go-4devs/log/field"
+)
+
+func main() {
+	ctx := context.Background()
+
+	log.DebugKV(ctx, "debug message")
+	log.ErrKV(ctx, "error message")
+	log.Errf(ctx, "format error message:%v", 42)
+	log.Err(ctx, "error message", 42)
+	service(ctx, log.Log())
+
+	logger := log.New(log.WithJSONFormat()).With(log.WithSource(10, log.TrimPath), log.WithTime(log.KeyTime, time.RFC3339))
+	logger.AlertKV(ctx, "alert message new logger", field.String("string", "value"))
+	service(ctx, logger)
+
+	strLogger := log.New(log.WithFormat(log.FormatWithBracket(field.NewEncoderText()))).With(log.WithSource(10, log.TrimPath), log.WithTime(log.KeyTime, time.RFC3339))
+	strLogger.AlertKV(ctx, "alert message new txt logger", field.String("string", "value"))
+	service(ctx, strLogger)
+}
+
+func service(ctx context.Context, logger log.Logger) {
+	logger = logger.With(log.WithName("service"))
+	logger.WarnKV(ctx, "warn service message")
+	otherService(ctx, logger)
+}
+
+func otherService(ctx context.Context, logger log.Logger) {
+	logger = logger.With(log.WithName("other_service"))
+	logger.WarnKV(ctx, "warn other service message")
+}

field/encoder.go

@@ -174,6 +174,7 @@ func needsQuoting(in string) bool {
 			if char != '\\' && (char == ' ' || char == '=' || !safeSet[char]) {
 				return true
 			}
+
 			i++
 
 			continue

field/field.go

@@ -501,3 +501,14 @@ type Field struct {
 func (f Field) String() string {
 	return fmt.Sprintf("%s=%+v", f.Key, f.Value)
 }
+
+// String implent stringer.
+func (f Field) IsKey(keys ...string) bool {
+	for _, key := range keys {
+		if key == f.Key {
+			return true
+		}
+	}
+
+	return false
+}

global.go

@@ -3,14 +3,15 @@ package log
 import (
 	"context"
 	"io"
+	"time"
 
 	"gitoa.ru/go-4devs/log/field"
 	"gitoa.ru/go-4devs/log/level"
 )
 
-//nolint:gochecknoglobals
+//nolint:gochecknoglobals,gomnd
 var global = With(New(),
-	WithSource(1),
+	WithTime(KeyTime, time.RFC3339),
 	WithLevel(KeyLevel, level.Debug),
 	WithExit(level.Alert),
 	WithPanic(level.Emergency),

global_example_test.go

@@ -2,14 +2,15 @@ package log_test
 
 import (
 	"context"
+	"path/filepath"
 
 	"gitoa.ru/go-4devs/log"
 	"gitoa.ru/go-4devs/log/level"
 )
 
 func ExampleDebug() {
-	logger := log.With(log.New(log.WithStdout()),
-		log.WithSource(2),
+	logger := log.New(log.WithStdout()).With(
+		log.WithSource(2, filepath.Base),
 		log.WithLevel(log.KeyLevel, level.Debug),
 		log.WithExit(level.Alert),
 		log.WithPanic(level.Emergency),
@@ -20,5 +21,5 @@ func ExampleDebug() {
 	ctx := context.Background()
 	log.Debug(ctx, "debug message")
 	// Output:
-	// msg="debug message" source=global_example_test.go:21 level=debug
+	// msg="debug message" source=global_example_test.go:22 level=debug
 }

handler/logrus/logger.go

@@ -11,11 +11,13 @@ import (
 )
 
 // Standard create new standart logrus handler.
+// Deprecated: delete after 0.7.0
 func Standard() log.Logger {
 	return New(logrus.StandardLogger())
 }
 
 // New create new logrus handler.
+// Deprecated: delete after 0.7.0
 func New(log *logrus.Logger) log.Logger {
 	return func(ctx context.Context, data *entry.Entry) (int, error) {
 		lrgFields := make(logrus.Fields, data.Fields().Len())

handler/otel/logger.go

@@ -7,6 +7,7 @@ import (
 	"gitoa.ru/go-4devs/log/entry"
 )
 
+// Deprecated: delete after 0.7.0
 func New() log.Logger {
 	return func(ctx context.Context, e *entry.Entry) (int, error) {
 		addEvent(ctx, e)

handler/otel/middleware.go

@@ -7,6 +7,7 @@ import (
 	"gitoa.ru/go-4devs/log/entry"
 )
 
+// Deprecated: delete after 0.7.0
 func Middleware() log.Middleware {
 	return func(ctx context.Context, e *entry.Entry, handler log.Logger) (int, error) {
 		addEvent(ctx, e)

handler/zap/logger.go

@@ -10,14 +10,17 @@ import (
 	"go.uber.org/zap"
 )
 
+// Deprecated: delete after 0.7.0
 func Nop() log.Logger {
 	return New(zap.NewNop())
 }
 
+// Deprecated: delete after 0.7.0
 func Example(options ...zap.Option) log.Logger {
 	return New(zap.NewExample(options...))
 }
 
+// Deprecated: delete after 0.7.0
 func Production(options ...zap.Option) log.Logger {
 	z, err := zap.NewProduction(options...)
 	if err != nil {
@@ -27,6 +30,7 @@ func Production(options ...zap.Option) log.Logger {
 	return New(z)
 }
 
+// Deprecated: delete after 0.7.0
 func Development(options ...zap.Option) log.Logger {
 	z, err := zap.NewDevelopment(options...)
 	if err != nil {

logger_example_caller_test.go

@@ -1,22 +1,23 @@
 package log_test
 
 import (
+	"path/filepath"
+
 	"gitoa.ru/go-4devs/log"
 	"gitoa.ru/go-4devs/log/level"
 )
 
 func ExampleNew_withCaller() {
-	logger := log.With(
-		log.New(log.WithStdout()),
-		log.WithLevel("level", level.Debug),
-		log.WithSource(3),
+	logger := log.New(log.WithStdout()).With(
+		log.WithLevel(log.KeyLevel, level.Debug),
+		log.WithSource(3, filepath.Base),
 	)
 	logger.Err(ctx, "same error message")
 	logger.InfoKVs(ctx, "same info message", "api-version", 0.1)
 	_, _ = logger.Write([]byte("same write message"))
 
 	// Output:
-	// msg="same error message" level=error source=logger_example_caller_test.go:14
-	// msg="same info message" api-version=0.1 level=info source=logger_example_caller_test.go:15
-	// msg="same write message" level=info source=logger_example_caller_test.go:16
+	// msg="same error message" level=error source=logger_example_caller_test.go:15
+	// msg="same info message" api-version=0.1 level=info source=logger_example_caller_test.go:16
+	// msg="same write message" level=info source=logger_example_caller_test.go:17
 }

logger_example_test.go

@@ -47,19 +47,19 @@ func ExampleNew_errf() {
 }
 
 func ExampleNew_debugKV() {
-	logger := log.New(log.WithStdout()).With(log.WithLevel("level", level.Debug))
+	logger := log.New(log.WithStdout()).With(log.WithLevel(log.KeyLevel, level.Debug))
 	logger.DebugKVs(ctx, "same message", "error", os.ErrNotExist)
 	// Output: msg="same message" error="file does not exist" level=debug
 }
 
 func ExampleNew_level() {
-	logger := log.New(log.WithStdout()).With(log.WithLevel("level", level.Error))
+	logger := log.New(log.WithStdout()).With(log.WithLevel(log.KeyLevel, level.Error))
 	logger.Err(ctx, "same error message")
 	// Output: msg="same error message" level=error
 }
 
 func ExampleNew_level_info() {
-	logger := log.New(log.WithStdout()).With(log.WithLevel("level", level.Error))
+	logger := log.New(log.WithStdout()).With(log.WithLevel(log.KeyLevel, level.Error))
 	logger.Info(ctx, "same message")
 	// Output:
 }
@@ -213,22 +213,22 @@ func ExampleNew_jsonFormat() {
 	logger.Err(ctx, "same error message")
 	logger.WarnKVs(ctx, "same warn message", "obj", Obj{Name: "obj name"})
 	// Output:
-	// {"msg":"same error message","level":"error","go-version":"go1.21.5"}
-	// {"msg":"same warn message","obj":{"Name":"obj name","IsEnable":false},"level":"warning","go-version":"go1.21.5"}
+	// {"msg":"same error message","level":"error","go-version":"go1.22.2"}
+	// {"msg":"same warn message","obj":{"Name":"obj name","IsEnable":false},"level":"warning","go-version":"go1.22.2"}
 }
 
 func ExampleNew_textEncoding() {
-	logger := log.With(
-		log.New(log.WithStdout()),
-		log.WithLevel(log.KeyLevel, level.Debug),
-		log.GoVersion("go-version"),
-	)
+	logger := log.New(log.WithStdout()).
+		With(
+			log.WithLevel(log.KeyLevel, level.Debug),
+			log.GoVersion("go-version"),
+		)
 	logger.Err(ctx, "same error message")
 	logger.InfoKVs(ctx, "same info message", "api-version", 0.1, "obj", Obj{Name: "text value", IsEnable: true})
 
 	// Output:
-	// msg="same error message" level=error go-version=go1.21.5
-	// msg="same info message" api-version=0.1 obj={Name:text value IsEnable:true} level=info go-version=go1.21.5
+	// msg="same error message" level=error go-version=go1.22.2
+	// msg="same info message" api-version=0.1 obj={Name:text value IsEnable:true} level=info go-version=go1.22.2
 }
 
 type ctxKey string
@@ -238,28 +238,32 @@ func (c ctxKey) String() string {
 }
 
 func levelInfo(ctx context.Context, entry *entry.Entry, handler log.Logger) (int, error) {
-	return handler(ctx, entry.Add(field.String("level", entry.Level().String())))
+	return handler(ctx, entry.Add(field.String(log.KeyLevel, entry.Level().String())))
 }
 
 func ExampleWith() {
 	var requestID ctxKey = "requestID"
 	vctx := context.WithValue(ctx, requestID, "6a5fa048-7181-11ea-bc55-0242ac130003")
 
-	logger := log.With(
-		log.New(log.WithStdout()),
-		levelInfo, log.WithContextValue(requestID), log.KeyValue("api", "0.1.0"), log.GoVersion("go"),
+	logger := log.New(log.WithStdout()).With(
+		levelInfo,
+		log.WithContextValue(requestID),
+		log.KeyValue("api", "0.1.0"),
+		log.GoVersion("go"),
 	)
 	logger.Info(vctx, "same message")
-	// Output: msg="same message" level=info requestID=6a5fa048-7181-11ea-bc55-0242ac130003 api=0.1.0 go=go1.21.5
+	// Output: msg="same message" level=info requestID=6a5fa048-7181-11ea-bc55-0242ac130003 api=0.1.0 go=go1.22.2
 }
 
 func ExampleLogger_Print() {
-	logger := log.With(
-		log.New(log.WithStdout()),
-		levelInfo, log.KeyValue("client", "http"), log.KeyValue("api", "0.1.0"), log.GoVersion("go"),
+	logger := log.New(log.WithStdout()).With(
+		levelInfo,
+		log.KeyValue("client", "http"),
+		log.KeyValue("api", "0.1.0"),
+		log.GoVersion("go"),
 	)
 	logger.Print("same message")
-	// Output: msg="same message" level=info client=http api=0.1.0 go=go1.21.5
+	// Output: msg="same message" level=info client=http api=0.1.0 go=go1.22.2
 }
 
 func ExamplePrint() {
@@ -277,7 +281,7 @@ func Example_fieldClosureFn() {
 		return d
 	})
 
-	log := log.With(log.New(log.WithStdout()), log.WithLevel("level", level.Info))
+	log := log.New(log.WithStdout()).With(log.WithLevel(log.KeyLevel, level.Info))
 
 	log.DebugKVs(ctx, "debug message", "data", closure)
 	log.ErrKVs(ctx, "error message", "err", closure)
@@ -289,7 +293,9 @@ func Example_fieldClosureFn() {
 }
 
 func Example_withGroup() {
-	log := log.With(log.New(log.WithStdout()), log.WithLevel(log.KeyLevel, level.Info))
+	log := log.New(log.WithStdout()).With(
+		log.WithLevel(log.KeyLevel, level.Info),
+	)
 
 	log.ErrKVs(ctx, "error message",
 		field.Groups("grous_field",

logger_test.go

@@ -27,7 +27,7 @@ func TestFields(t *testing.T) {
 	ctx := context.Background()
 	buf := &bytes.Buffer{}
 	log := log.New(log.WithWriter(buf)).
-		With(log.WithLevel("level", level.Info))
+		With(log.WithLevel(log.KeyLevel, level.Info))
 	success := "msg=message err=\"file already exists\" version=0.1.0 obj={id:uid} closure=\"some closure data\" level=info\n"
 
 	log.InfoKVs(ctx, "message",
@@ -65,7 +65,7 @@ func TestWriter(t *testing.T) {
 
 	success := "msg=\"info message\" err=\"file already exists\" requestID=6a5fa048-7181-11ea-bc55-0242ac1311113 level=info\n"
 	buf := &bytes.Buffer{}
-	logger := log.New(log.WithWriter(buf)).With(log.WithContextValue(requestID), log.WithLevel("level", level.Info))
+	logger := log.New(log.WithWriter(buf)).With(log.WithContextValue(requestID), log.WithLevel(log.KeyLevel, level.Info))
 
 	_, _ = logger.Writer(
 		context.WithValue(ctx, requestID, "6a5fa048-7181-11ea-bc55-0242ac1311113"),
@@ -91,7 +91,7 @@ func TestLogger(t *testing.T) {
 
 	ctx := context.Background()
 	buf := &bytes.Buffer{}
-	logger := log.New(log.WithWriter(buf)).With(log.WithContextValue(requestID), log.WithLevel("level", level.Info))
+	logger := log.New(log.WithWriter(buf)).With(log.WithContextValue(requestID), log.WithLevel(log.KeyLevel, level.Info))
 
 	_, err := logger(ctx, nil)
 	if err != nil {

middleware.go

@@ -38,6 +38,7 @@ func With(logger Logger, mw ...Middleware) Logger {
 			if curI == lastI {
 				return logger(currentCtx, currentEntry)
 			}
+
 			curI++
 			n, err := mw[curI](currentCtx, currentEntry, chainHandler)
 			curI--
@@ -85,6 +86,12 @@ func WithContextValue(keys ...fmt.Stringer) Middleware {
 	}
 }
 
+func WithName(name string) Middleware {
+	return func(ctx context.Context, data *entry.Entry, handler Logger) (int, error) {
+		return handler(ctx, data.Replace(KeyName, field.StringValue(name)))
+	}
+}
+
 // WithCaller adds called file.
 // Deprecated: use WithSource.
 func WithCaller(key string, depth int, full bool) Middleware {

source.go

@@ -5,30 +5,75 @@ import (
 	"fmt"
 	"path/filepath"
 	"runtime"
+	"strings"
 
 	"gitoa.ru/go-4devs/log/entry"
 	"gitoa.ru/go-4devs/log/field"
 )
 
-func WithSource(depth int) Middleware {
-	const offset = 3
+func WithSource(items int, trimPath func(string) string) Middleware {
+	const (
+		skip       = 4
+		funcPrefix = "gitoa.ru/go-4devs/log.Logger"
+		skipHelper = "gitoa.ru/go-4devs/log."
+	)
+
+	items += skip
 
 	return func(ctx context.Context, data *entry.Entry, handler Logger) (int, error) {
-		pc, file, line, has := runtime.Caller(depth + offset)
-		if !has {
-			return handler(ctx, data.AddAny(KeyLevel, field.NilValue()))
+		pc := make([]uintptr, items)
+		n := runtime.Callers(skip, pc)
+
+		if n == 0 {
+			return handler(ctx, data.Add(errSourceField(skip, items)))
 		}
 
-		fnc := runtime.FuncForPC(pc)
+		pc = pc[:n] // pass only valid pcs to runtime.CallersFrames
+		frames := runtime.CallersFrames(pc)
+		prew := false
 
-		return handler(ctx, data.AddAny(KeySource, Source{
-			Func: filepath.Base(fnc.Name()),
-			File: filepath.Base(file),
-			Line: line,
-		}))
+		for {
+			frame, more := frames.Next()
+
+			has := strings.HasPrefix(frame.Function, funcPrefix)
+			if !has && prew {
+				if strings.HasPrefix(frame.Function, skipHelper) {
+					continue
+				}
+
+				return handler(ctx, data.AddAny(KeySource, Source{
+					Func: filepath.Base(frame.Function),
+					Line: frame.Line,
+					File: trimPath(frame.File),
+				}))
+			}
+
+			prew = has
+
+			if !more {
+				break
+			}
+		}
+
+		return handler(ctx, data.Add(errSourceField(skip, items)))
 	}
 }
 
+func TrimPath(file string) string {
+	idx := strings.LastIndexByte(file, '/')
+	if idx == -1 {
+		return filepath.Base(file)
+	}
+
+	// Find the penultimate separator.
+	idx = strings.LastIndexByte(file[:idx], '/')
+	if idx == -1 {
+		return filepath.Base(file)
+	}
+
+	return file[idx+1:]
+}
+
 // Source describes the location of a line of source code.
 type Source struct {
 	Func string `json:"func"`
@@ -43,3 +88,7 @@ func (l Source) MarshalText() ([]byte, error) {
 func (l Source) MarshalJSON() ([]byte, error) {
 	return fmt.Appendf([]byte{}, `{"file":"%s","line":%d,"func":"%s"}`, l.File, l.Line, l.Func), nil
 }
+
+func errSourceField(skip, max int) field.Field {
+	return field.String(KeySource, fmt.Sprintf("source not found by frames[%d:%d]", skip, max))
+}

source_example_test.go

@@ -2,24 +2,25 @@ package log_test
 
 import (
 	"context"
+	"path/filepath"
 
 	"gitoa.ru/go-4devs/log"
 )
 
 func ExampleWithSource() {
 	ctx := context.Background()
-	logger := log.New(log.WithStdout()).With(log.WithSource(1))
+	logger := log.New(log.WithStdout()).With(log.WithSource(1, filepath.Base))
 
 	logger.Debug(ctx, "debug message")
 	// Output:
-	// msg="debug message" source=source_example_test.go:13
+	// msg="debug message" source=source_example_test.go:14
 }
 
 func ExampleWithSource_json() {
 	ctx := context.Background()
-	logger := log.New(log.WithStdout(), log.WithJSONFormat()).With(log.WithSource(1))
+	logger := log.New(log.WithStdout(), log.WithJSONFormat()).With(log.WithSource(2, filepath.Base))
 
 	logger.Debug(ctx, "debug message")
 	// Output:
-	// {"msg":"debug message","source":{"file":"source_example_test.go","line":22,"func":"log_test.ExampleWithSource_json"}}
+	// {"msg":"debug message","source":{"file":"source_example_test.go","line":23,"func":"log_test.ExampleWithSource_json"}}
 }

writer_example_test.go

@@ -0,0 +1,37 @@
+package log_test
+
+import (
+	"context"
+	"math"
+	"path/filepath"
+	"time"
+
+	"gitoa.ru/go-4devs/log"
+	"gitoa.ru/go-4devs/log/entry"
+	"gitoa.ru/go-4devs/log/field"
+	"gitoa.ru/go-4devs/log/level"
+)
+
+func exampleWithTime(key, format string) log.Middleware {
+	return func(ctx context.Context, e *entry.Entry, handler log.Logger) (int, error) {
+		return handler(ctx, e.Add(field.FormatTime(key, format, time.Unix(math.MaxInt32, 0).In(time.UTC))))
+	}
+}
+
+func ExampleFormatWithBracket() {
+	ctx := context.Background()
+	logger := log.New(log.WithFormat(log.FormatWithBracket(field.NewEncoderText())), log.WithStdout()).With(
+		log.WithSource(10, filepath.Base),
+		// log.WithTime(log.KeyTime, time.RFC3339),
+		exampleWithTime(log.KeyTime, time.RFC3339),
+		log.WithLevel(log.KeyLevel, level.Info),
+	)
+
+	logger.InfoKV(ctx, "imfo message", field.Int64("num", 42))
+
+	serviceLogger := logger.With(log.WithName("service_name"))
+	serviceLogger.Err(ctx, "error message")
+	// Output:
+	// 2038-01-19T03:14:07Z [info] writer_example_test.go:30 "imfo message" num=42
+	// 2038-01-19T03:14:07Z [error][service_name] writer_example_test.go:33 "error message"
+}

writter.go

@@ -25,6 +25,8 @@ const (
 	// SourceKey is the key used by the built-in handlers for the source file
 	// and line of the log call. The associated value is a string.
 	KeySource = "source"
+	// KeyName logger name.
+	KeyName = "name"
 )
 
 func WithWriter(w io.Writer) func(*option) {
@@ -41,15 +43,18 @@ func WithStdout() func(*option) {
 
 // WithStringFormat sets format as simple string.
 func WithStringFormat() func(*option) {
-	return func(o *option) {
-		o.format = formatText()
-	}
+	return WithFormat(FormatString(field.NewEncoderText()))
 }
 
 // WithJSONFormat sets json output format.
 func WithJSONFormat() func(*option) {
+	return WithFormat(FormatJSON(field.NewEncoderJSON()))
+}
+
+// WithFormat sets custom output format.
+func WithFormat(format func(io.Writer, *entry.Entry) (int, error)) func(*option) {
 	return func(o *option) {
-		o.format = formatJSON()
+		o.format = format
 	}
 }
 
@@ -61,8 +66,8 @@ type option struct {
 // New creates standart logger.
 func New(opts ...func(*option)) Logger {
 	log := option{
-		format: formatText(),
-		out:    os.Stdout,
+		format: FormatString(field.NewEncoderText()),
+		out:    os.Stderr,
 	}
 
 	for _, opt := range opts {
@@ -74,9 +79,64 @@ func New(opts ...func(*option)) Logger {
 	}
 }
 
-func formatText() func(io.Writer, *entry.Entry) (int, error) {
-	enc := field.NewEncoderText()
+type Encoder interface {
+	AppendValue(dst []byte, val field.Value) []byte
+	AppendField(dst []byte, val field.Field) []byte
+}
 
+func FormatWithBracket(enc Encoder) func(io.Writer, *entry.Entry) (int, error) {
+	appendValue := func(buf *buffer.Buffer, data field.Fields, key, prefix, suffix string) *buffer.Buffer {
+		data.Fields(
+			func(f field.Field) bool {
+				if f.IsKey(key) {
+					_, _ = buf.WriteString(prefix)
+					*buf = enc.AppendValue(*buf, f.Value)
+					_, _ = buf.WriteString(suffix)
+
+					return false
+				}
+
+				return true
+			})
+
+		return buf
+	}
+
+	return func(w io.Writer, data *entry.Entry) (int, error) {
+		buf := buffer.New()
+		defer func() {
+			buf.Free()
+		}()
+
+		fields := data.Fields()
+		buf = appendValue(buf, fields, KeyTime, "", " ")
+		_, _ = buf.WriteString("[")
+		*buf = enc.AppendValue(*buf, field.StringValue(data.Level().String()))
+		_, _ = buf.WriteString("]")
+		buf = appendValue(buf, fields, KeyName, "[", "]")
+		buf = appendValue(buf, fields, KeySource, " ", " ")
+		*buf = enc.AppendValue(*buf, field.StringValue(data.Message()))
+
+		fields.Fields(func(f field.Field) bool {
+			if !f.IsKey(KeyTime, KeySource, KeyName, KeyLevel) {
+				*buf = enc.AppendField(*buf, f)
+			}
+
+			return true
+		})
+
+		_, _ = buf.WriteString("\n")
+
+		n, err := w.Write(*buf)
+		if err != nil {
+			return 0, fmt.Errorf("format text:%w", err)
+		}
+
+		return n, nil
+	}
+}
+
+func FormatString(enc Encoder) func(io.Writer, *entry.Entry) (int, error) {
 	return func(w io.Writer, entry *entry.Entry) (int, error) {
 		buf := buffer.New()
 		defer func() {
@@ -100,9 +160,7 @@ func formatText() func(io.Writer, *entry.Entry) (int, error) {
 	}
 }
 
-func formatJSON() func(w io.Writer, entry *entry.Entry) (int, error) {
-	enc := field.NewEncoderJSON()
-
+func FormatJSON(enc Encoder) func(w io.Writer, entry *entry.Entry) (int, error) {
 	return func(w io.Writer, entry *entry.Entry) (int, error) {
 		buf := buffer.New()
 		defer func() {