logger color for windows cmd(#2383)

enable logger color for windows cmd/powershell.

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/golang/protobuf v1.3.3
 	github.com/json-iterator/go v1.1.9
 	github.com/mattn/go-isatty v0.0.12
+	github.com/shiena/ansicolor v0.0.0-20151119151921-a422bbe96644
 	github.com/stretchr/testify v1.4.0
 	github.com/ugorji/go/codec v1.1.7
 	gopkg.in/yaml.v2 v2.2.8

go.sum

@@ -26,6 +26,8 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 h1:Esafd1046DLD
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/shiena/ansicolor v0.0.0-20151119151921-a422bbe96644 h1:X+yvsM2yrEktyI+b2qND5gpH8YhURn0k8OCaeRnkINo=
+github.com/shiena/ansicolor v0.0.0-20151119151921-a422bbe96644/go.mod h1:nkxAfR/5quYxwPZhyDxgasBMnRtBZd0FCEpawpjMUFg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=

logger.go

@@ -9,9 +9,11 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"runtime"
 	"time"
 
 	"github.com/mattn/go-isatty"
+	"github.com/shiena/ansicolor"
 )
 
 type consoleColorModeValue int
@@ -221,6 +223,10 @@ func LoggerWithConfig(conf LoggerConfig) HandlerFunc {
 		isTerm = false
 	}
 
+	if runtime.GOOS == "windows" {
+		out = ansicolor.NewAnsiColorWriter(out)
+	}
+
 	var skip map[string]struct{}
 
 	if length := len(notlogged); length > 0 {