feat:add context for log (#2041)

* add context

log/global.go

@@ -1,6 +1,7 @@
 package log
 
 import (
+	"context"
 	"sync"
 )
 
@@ -46,6 +47,10 @@ func Log(level Level, keyvals ...interface{}) {
 	global.helper.Log(level, keyvals...)
 }
 
+func Context(ctx context.Context) *Helper {
+	return global.helper.WithContext(ctx)
+}
+
 // Debug logs a message at debug level.
 func Debug(a ...interface{}) {
 	global.helper.Debug(a...)

log/global_test.go

@@ -2,6 +2,7 @@ package log
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"os"
 	"strings"
@@ -83,3 +84,12 @@ func TestGlobalLogUpdate(t *testing.T) {
 		t.Errorf("Expected: %s, got: %s", expected, buffer.String())
 	}
 }
+
+func TestGolbalContext(t *testing.T) {
+	buffer := &bytes.Buffer{}
+	SetLogger(NewStdLogger(buffer))
+	Context(context.Background()).Infof("111")
+	if buffer.String() != "INFO msg=111\n" {
+		t.Errorf("Expected:%s, got:%s", "INFO msg=111", buffer.String())
+	}
+}