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Make every not exist error unwrappable to a fs.ErrNotExist (#20891)

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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>
This commit is contained in:
zeripath
2022-10-18 06:50:37 +01:00
committed by GitHub
parent 6af1a0c8c0
commit 716fcfcf72
48 changed files with 545 additions and 20 deletions
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8
models/repo/release.go
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@ -37,6 +37,10 @@ func (err ErrReleaseAlreadyExist) Error() string {
return fmt.Sprintf("release tag already exist [tag_name: %s]", err.TagName)
}
func (err ErrReleaseAlreadyExist) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrReleaseNotExist represents a "ReleaseNotExist" kind of error.
type ErrReleaseNotExist struct {
ID int64
@ -53,6 +57,10 @@ func (err ErrReleaseNotExist) Error() string {
return fmt.Sprintf("release tag does not exist [id: %d, tag_name: %s]", err.ID, err.TagName)
}
func (err ErrReleaseNotExist) Unwrap() error {
return util.ErrNotExist
}
// Release represents a release of repository.
type Release struct {
ID int64 `xorm:"pk autoincr"`