716fcfcf72
A lot of our code is repeatedly testing if individual errors are specific types of Not Exist errors. This is repetitative and unnecesary. `Unwrap() error` provides a common way of labelling an error as a NotExist error and we can/should use this. This PR has chosen to use the common `io/fs` errors e.g. `fs.ErrNotExist` for our errors. This is in some ways not completely correct as these are not filesystem errors but it seems like a reasonable thing to do and would allow us to simplify a lot of our code to `errors.Is(err, fs.ErrNotExist)` instead of `package.IsErr...NotExist(err)` I am open to suggestions to use a different base error - perhaps `models/db.ErrNotExist` if that would be felt to be better. Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: delvh <dev.lh@web.de>
38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package util
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import (
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"errors"
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)
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// Common Errors forming the base of our error system
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//
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// Many Errors returned by Gitea can be tested against these errors
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// using errors.Is.
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var (
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ErrInvalidArgument = errors.New("invalid argument")
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ErrPermissionDenied = errors.New("permission denied")
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ErrAlreadyExist = errors.New("resource already exists")
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ErrNotExist = errors.New("resource does not exist")
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)
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// SilentWrap provides a simple wrapper for a wrapped error where the wrapped error message plays no part in the error message
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// Especially useful for "untyped" errors created with "errors.New(…)" that can be classified as 'invalid argument', 'permission denied', 'exists already', or 'does not exist'
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type SilentWrap struct {
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Message string
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Err error
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}
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// Error returns the message
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func (w SilentWrap) Error() string {
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return w.Message
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}
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// Unwrap returns the underlying error
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func (w SilentWrap) Unwrap() error {
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return w.Err
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}
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