migrated from logrus to zerolog, improved error formatting, fixed concurrent map write, fixed crash on rapid page refresh for idle containers, fixed infinite recursion on gotfiy error, fixed websocket connection problem when using idlewatcher

internal/error/nested_error.go

@@ -0,0 +1,120 @@
+package error
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+type nestedError struct {
+	Err    error   `json:"err"`
+	Extras []error `json:"extras"`
+}
+
+func (err nestedError) Subject(subject string) Error {
+	if err.Err == nil {
+		err.Err = newError(subject)
+	} else {
+		err.Err = PrependSubject(subject, err.Err)
+	}
+	return &err
+}
+
+func (err *nestedError) Subjectf(format string, args ...any) Error {
+	if len(args) > 0 {
+		return err.Subject(fmt.Sprintf(format, args...))
+	}
+	return err.Subject(format)
+}
+
+func (err nestedError) With(extra error) Error {
+	if extra != nil {
+		err.Extras = append(err.Extras, extra)
+	}
+	return &err
+}
+
+func (err nestedError) Withf(format string, args ...any) Error {
+	if len(args) > 0 {
+		err.Extras = append(err.Extras, fmt.Errorf(format, args...))
+	} else {
+		err.Extras = append(err.Extras, newError(format))
+	}
+	return &err
+}
+
+func (err *nestedError) Unwrap() []error {
+	if err.Err == nil {
+		if len(err.Extras) == 0 {
+			return nil
+		}
+		return err.Extras
+	}
+	return append([]error{err.Err}, err.Extras...)
+}
+
+func (err *nestedError) Is(other error) bool {
+	if errors.Is(err.Err, other) {
+		return true
+	}
+	for _, e := range err.Extras {
+		if errors.Is(e, other) {
+			return true
+		}
+	}
+	return false
+}
+
+func (err *nestedError) Error() string {
+	return buildError(err, 0)
+}
+
+//go:inline
+func makeLine(err string, level int) string {
+	const bulletPrefix = "• "
+	const spaces = "                "
+
+	if level == 0 {
+		return err
+	}
+	return spaces[:2*level] + bulletPrefix + err
+}
+
+func makeLines(errs []error, level int) []string {
+	if len(errs) == 0 {
+		return nil
+	}
+	lines := make([]string, 0, len(errs))
+	for _, err := range errs {
+		switch err := err.(type) {
+		case *nestedError:
+			if err.Err != nil {
+				lines = append(lines, makeLine(err.Err.Error(), level))
+			}
+			if extras := makeLines(err.Extras, level+1); len(extras) > 0 {
+				lines = append(lines, extras...)
+			}
+		default:
+			lines = append(lines, makeLine(err.Error(), level))
+		}
+	}
+	return lines
+}
+
+func buildError(err error, level int) string {
+	switch err := err.(type) {
+	case nil:
+		return makeLine("<nil>", level)
+	case *nestedError:
+		lines := make([]string, 0, 1+len(err.Extras))
+		if err.Err != nil {
+			lines = append(lines, makeLine(err.Err.Error(), level))
+		}
+		if extras := makeLines(err.Extras, level+1); len(extras) > 0 {
+			lines = append(lines, extras...)
+		}
+		return strings.Join(lines, "\n")
+	default:
+		return makeLine(err.Error(), level)
+	}
+}