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|
package errors
import (
"bytes"
"fmt"
"reflect"
"github.com/goccy/go-yaml/printer"
"github.com/goccy/go-yaml/token"
"golang.org/x/xerrors"
)
const (
defaultColorize = false
defaultIncludeSource = true
)
var (
ErrDecodeRequiredPointerType = xerrors.New("required pointer type value")
)
// Wrapf wrap error for stack trace
func Wrapf(err error, msg string, args ...interface{}) error {
return &wrapError{
baseError: &baseError{},
err: xerrors.Errorf(msg, args...),
nextErr: err,
frame: xerrors.Caller(1),
}
}
// ErrSyntax create syntax error instance with message and token
func ErrSyntax(msg string, tk *token.Token) *syntaxError {
return &syntaxError{
baseError: &baseError{},
msg: msg,
token: tk,
frame: xerrors.Caller(1),
}
}
type baseError struct {
state fmt.State
verb rune
}
func (e *baseError) Error() string {
return ""
}
func (e *baseError) chainStateAndVerb(err error) {
wrapErr, ok := err.(*wrapError)
if ok {
wrapErr.state = e.state
wrapErr.verb = e.verb
}
syntaxErr, ok := err.(*syntaxError)
if ok {
syntaxErr.state = e.state
syntaxErr.verb = e.verb
}
}
type wrapError struct {
*baseError
err error
nextErr error
frame xerrors.Frame
}
type FormatErrorPrinter struct {
xerrors.Printer
Colored bool
InclSource bool
}
func (e *wrapError) As(target interface{}) bool {
err := e.nextErr
for {
if wrapErr, ok := err.(*wrapError); ok {
err = wrapErr.nextErr
continue
}
break
}
return xerrors.As(err, target)
}
func (e *wrapError) Unwrap() error {
return e.nextErr
}
func (e *wrapError) PrettyPrint(p xerrors.Printer, colored, inclSource bool) error {
return e.FormatError(&FormatErrorPrinter{Printer: p, Colored: colored, InclSource: inclSource})
}
func (e *wrapError) FormatError(p xerrors.Printer) error {
if _, ok := p.(*FormatErrorPrinter); !ok {
p = &FormatErrorPrinter{
Printer: p,
Colored: defaultColorize,
InclSource: defaultIncludeSource,
}
}
if e.verb == 'v' && e.state.Flag('+') {
// print stack trace for debugging
p.Print(e.err, "\n")
e.frame.Format(p)
e.chainStateAndVerb(e.nextErr)
return e.nextErr
}
err := e.nextErr
for {
if wrapErr, ok := err.(*wrapError); ok {
err = wrapErr.nextErr
continue
}
break
}
e.chainStateAndVerb(err)
if fmtErr, ok := err.(xerrors.Formatter); ok {
fmtErr.FormatError(p)
} else {
p.Print(err)
}
return nil
}
type wrapState struct {
org fmt.State
}
func (s *wrapState) Write(b []byte) (n int, err error) {
return s.org.Write(b)
}
func (s *wrapState) Width() (wid int, ok bool) {
return s.org.Width()
}
func (s *wrapState) Precision() (prec int, ok bool) {
return s.org.Precision()
}
func (s *wrapState) Flag(c int) bool {
// set true to 'printDetail' forced because when p.Detail() is false, xerrors.Printer no output any text
if c == '#' {
// ignore '#' keyword because xerrors.FormatError doesn't set true to printDetail.
// ( see https://github.com/golang/xerrors/blob/master/adaptor.go#L39-L43 )
return false
}
return true
}
func (e *wrapError) Format(state fmt.State, verb rune) {
e.state = state
e.verb = verb
xerrors.FormatError(e, &wrapState{org: state}, verb)
}
func (e *wrapError) Error() string {
var buf bytes.Buffer
e.PrettyPrint(&Sink{&buf}, defaultColorize, defaultIncludeSource)
return buf.String()
}
type syntaxError struct {
*baseError
msg string
token *token.Token
frame xerrors.Frame
}
func (e *syntaxError) PrettyPrint(p xerrors.Printer, colored, inclSource bool) error {
return e.FormatError(&FormatErrorPrinter{Printer: p, Colored: colored, InclSource: inclSource})
}
func (e *syntaxError) FormatError(p xerrors.Printer) error {
var pp printer.Printer
var colored, inclSource bool
if fep, ok := p.(*FormatErrorPrinter); ok {
colored = fep.Colored
inclSource = fep.InclSource
}
pos := fmt.Sprintf("[%d:%d] ", e.token.Position.Line, e.token.Position.Column)
msg := pp.PrintErrorMessage(fmt.Sprintf("%s%s", pos, e.msg), colored)
if inclSource {
msg += "\n" + pp.PrintErrorToken(e.token, colored)
}
p.Print(msg)
if e.verb == 'v' && e.state.Flag('+') {
// %+v
// print stack trace for debugging
e.frame.Format(p)
}
return nil
}
type PrettyPrinter interface {
PrettyPrint(xerrors.Printer, bool, bool) error
}
type Sink struct{ *bytes.Buffer }
func (es *Sink) Print(args ...interface{}) {
fmt.Fprint(es.Buffer, args...)
}
func (es *Sink) Printf(f string, args ...interface{}) {
fmt.Fprintf(es.Buffer, f, args...)
}
func (es *Sink) Detail() bool {
return false
}
func (e *syntaxError) Error() string {
var buf bytes.Buffer
e.PrettyPrint(&Sink{&buf}, defaultColorize, defaultIncludeSource)
return buf.String()
}
type TypeError struct {
DstType reflect.Type
SrcType reflect.Type
StructFieldName *string
Token *token.Token
}
func (e *TypeError) Error() string {
if e.StructFieldName != nil {
return fmt.Sprintf("cannot unmarshal %s into Go struct field %s of type %s", e.SrcType, *e.StructFieldName, e.DstType)
}
return fmt.Sprintf("cannot unmarshal %s into Go value of type %s", e.SrcType, e.DstType)
}
func (e *TypeError) PrettyPrint(p xerrors.Printer, colored, inclSource bool) error {
return e.FormatError(&FormatErrorPrinter{Printer: p, Colored: colored, InclSource: inclSource})
}
func (e *TypeError) FormatError(p xerrors.Printer) error {
var pp printer.Printer
var colored, inclSource bool
if fep, ok := p.(*FormatErrorPrinter); ok {
colored = fep.Colored
inclSource = fep.InclSource
}
pos := fmt.Sprintf("[%d:%d] ", e.Token.Position.Line, e.Token.Position.Column)
msg := pp.PrintErrorMessage(fmt.Sprintf("%s%s", pos, e.Error()), colored)
if inclSource {
msg += "\n" + pp.PrintErrorToken(e.Token, colored)
}
p.Print(msg)
return nil
}
|
