Refactored internal error wrapping (with file and line identification) - replaced fmt.Printf("%w", err) error wrapping to internal stackError

Author: asmyasnikov

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 3.14.2
+* Refactored internal error wrapping (with file and line identification) - replaced `fmt.Printf("%w", err)` error wrapping to internal `stackError`
+
 ## 3.14.1
 * Added `balacers.CreateFromConfig` balancer creator
 * Added `Create` method to interface `balancer.Balancer`

internal/errors/errors.go

@@ -103,7 +103,10 @@ func (e *errorWithIssues) Error() string {
 
 // Error is alias to fmt.Errorf() with prepend file:line prefix
 func Error(err error) error {
-	return ErrorfSkip(1, "%w", err)
+	return &stackError{
+		stackRecord: stackRecord(1),
+		err:         err,
+	}
 }
 
 // Errorf is alias to fmt.Errorf() with prepend file:line prefix
@@ -113,8 +116,16 @@ func Errorf(format string, args ...interface{}) error {
 
 // ErrorfSkip is alias to fmt.Errorf() with prepend file:line prefix
 func ErrorfSkip(depth int, format string, args ...interface{}) error {
+	return &stackError{
+		stackRecord: stackRecord(depth + 1),
+		err:         fmt.Errorf(format, args...),
+	}
+}
+
+func stackRecord(depth int) string {
 	function, file, line, _ := runtime.Caller(depth + 1)
-	return fmt.Errorf(runtime.FuncForPC(function).Name()+" ("+fileName(file)+":"+strconv.Itoa(line)+") "+format, args...)
+	name := runtime.FuncForPC(function).Name()
+	return funcName(name) + "(" + packageName(name) + "/" + fileName(file) + ":" + strconv.Itoa(line) + ")"
 }
 
 func fileName(original string) string {
@@ -124,3 +135,32 @@ func fileName(original string) string {
 	}
 	return original[i+1:]
 }
+
+func packageName(original string) string {
+	i := strings.LastIndex(original, ".")
+	if i == -1 {
+		return original
+	}
+	return original[:i]
+}
+
+func funcName(original string) string {
+	i := strings.LastIndex(original, "/")
+	if i == -1 {
+		return original
+	}
+	return original[i+1:]
+}
+
+type stackError struct {
+	stackRecord string
+	err         error
+}
+
+func (e *stackError) Error() string {
+	return e.err.Error() + " at `" + e.stackRecord + "`"
+}
+
+func (e *stackError) Unwrap() error {
+	return e.err
+}

internal/errors/errors_test.go

@@ -0,0 +1,34 @@
+package errors
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestError(t *testing.T) {
+	for _, test := range []struct {
+		error error
+		text  string
+	}{
+		{
+			error: Error(fmt.Errorf("TestError")),
+			text:  "TestError at `errors.TestError(github.com/ydb-platform/ydb-go-sdk/v3/internal/errors/errors_test.go:14)`",
+		},
+		{
+			error: Errorf("TestError%s", "Printf"),
+			// nolint:lll
+			text: "TestErrorPrintf at `errors.TestError(github.com/ydb-platform/ydb-go-sdk/v3/internal/errors/errors_test.go:18)`",
+		},
+		{
+			error: ErrorfSkip(0, "TestError%s", "Printf"),
+			// nolint:lll
+			text: "TestErrorPrintf at `errors.TestError(github.com/ydb-platform/ydb-go-sdk/v3/internal/errors/errors_test.go:23)`",
+		},
+	} {
+		t.Run(test.text, func(t *testing.T) {
+			if test.error.Error() != test.text {
+				t.Fatalf("unexpected text of error: \"%s\", exp: \"%s\"", test.error.Error(), test.text)
+			}
+		})
+	}
+}

internal/meta/version.go

@@ -1,5 +1,5 @@
 package meta
 
 const (
-	Version = "ydb-go-sdk/3.14.1"
+	Version = "ydb-go-sdk/3.14.2"
 )