/
errors.go
102 lines (87 loc) · 2.35 KB
/
errors.go
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/*
* Copyright 2022 Mandelsoft. All rights reserved.
* This file is licensed under the Apache Software License, v. 2 except as noted
* otherwise in the LICENSE file
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package vfs
import (
"errors"
"os"
"reflect"
)
type ErrorMatcher func(err error) bool
func MatchErr(err error, match ErrorMatcher, base error) bool {
for err != nil {
if base == err || (match != nil && match(err)) {
return true
}
switch nerr := err.(type) {
case interface{ Unwrap() error }:
err = nerr.Unwrap()
default:
err = nil
v := reflect.ValueOf(nerr)
if v.Kind() == reflect.Struct {
f := v.FieldByName("Err")
if f.IsValid() {
err, _ = f.Interface().(error)
}
}
}
}
return false
}
func IsNotExist(err error) bool {
return IsErrNotExist(err)
}
func IsExist(err error) bool {
return IsErrExist(err)
}
func IsPermission(err error) bool {
return IsErrPermission(err)
}
func IsErrPermission(err error) bool {
if os.IsPermission(err) {
return true
}
return MatchErr(err, os.IsPermission, ErrPermission)
}
func IsErrNotDir(err error) bool {
return MatchErr(err, isUnderlyingErrNotDir, ErrNotDir)
}
func IsErrNotExist(err error) bool {
if os.IsNotExist(err) {
return true
}
return MatchErr(err, os.IsNotExist, ErrNotExist)
}
func IsErrExist(err error) bool {
if os.IsExist(err) {
return true
}
return MatchErr(err, os.IsExist, ErrExist)
}
func IsErrReadOnly(err error) bool {
return MatchErr(err, nil, ErrReadOnly)
}
func NewPathError(op string, path string, err error) error {
return &os.PathError{Op: op, Path: path, Err: err}
}
var ErrNotDir = errors.New("is no directory")
var ErrNotExist = os.ErrNotExist
var ErrPermission = os.ErrPermission
var ErrExist = os.ErrExist
var ErrReadOnly = errors.New("filehandle is not writable")
var ErrNotEmpty = errors.New("dir not empty")