Initial commit

pkg.go

@@ -0,0 +1,72 @@
+package WrappedError
+
+import (
+	// Standard
+	"errors"
+	"fmt"
+	"path"
+	"runtime"
+)
+
+type Error struct {
+	err error
+	file string
+	line int
+}
+
+type LogCallback func(Error)
+
+var (
+	logCallback LogCallback
+	baseDirLength int
+)
+
+func init() {
+	_, file, _, _ := runtime.Caller(0)
+	dir := path.Dir(file)
+	dirBase := path.Dir(dir)
+	baseDirLength = len(dirBase)
+}
+
+func SetLogCallback(cbk LogCallback) {
+	logCallback = cbk
+}
+
+func callback(wrapped Error) {
+	if logCallback != nil {
+		logCallback(wrapped)
+	}
+}
+
+func (wrapped Error) Error() string {
+	return fmt.Sprintf(
+		"[%s:%d] %s",
+		wrapped.file,
+		wrapped.line,
+		wrapped.err.Error(),
+	)
+}
+
+func create(err error) error {
+	_, file, line, _ := runtime.Caller(2)
+	file = file[baseDirLength+1:]
+
+	wrapped := Error{
+		err: err,
+		file: file,
+		line: line,
+	}
+
+	callback(wrapped)
+
+	return wrapped
+}
+
+func Wrap(err error) error {
+	return create(err)
+}
+
+func New(msg string) error {
+	wrapped := create(errors.New(msg))
+	return wrapped
+}