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forgejo/models/foreignreference/error.go
zeripath 716fcfcf72
Make every not exist error unwrappable to a fs.ErrNotExist (#20891)
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>
2022-10-18 07:50:37 +02:00

53 lines
1.4 KiB
Go

// Copyright 2022 Gitea. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package foreignreference
import (
"fmt"
"code.gitea.io/gitea/modules/util"
)
// ErrLocalIndexNotExist represents a "LocalIndexNotExist" kind of error.
type ErrLocalIndexNotExist struct {
RepoID int64
ForeignIndex int64
Type string
}
// ErrLocalIndexNotExist checks if an error is a ErrLocalIndexNotExist.
func IsErrLocalIndexNotExist(err error) bool {
_, ok := err.(ErrLocalIndexNotExist)
return ok
}
func (err ErrLocalIndexNotExist) Error() string {
return fmt.Sprintf("repository %d has no LocalIndex for ForeignIndex %d of type %s", err.RepoID, err.ForeignIndex, err.Type)
}
func (err ErrLocalIndexNotExist) Unwrap() error {
return util.ErrNotExist
}
// ErrForeignIndexNotExist represents a "ForeignIndexNotExist" kind of error.
type ErrForeignIndexNotExist struct {
RepoID int64
LocalIndex int64
Type string
}
// ErrForeignIndexNotExist checks if an error is a ErrForeignIndexNotExist.
func IsErrForeignIndexNotExist(err error) bool {
_, ok := err.(ErrForeignIndexNotExist)
return ok
}
func (err ErrForeignIndexNotExist) Error() string {
return fmt.Sprintf("repository %d has no ForeignIndex for LocalIndex %d of type %s", err.RepoID, err.LocalIndex, err.Type)
}
func (err ErrForeignIndexNotExist) Unwrap() error {
return util.ErrNotExist
}