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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
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48 changed files with 545 additions and 20 deletions
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12
models/repo/update.go
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@ -63,6 +63,10 @@ func (err ErrReachLimitOfRepo) Error() string {
return fmt.Sprintf("user has reached maximum limit of repositories [limit: %d]", err.Limit)
}
func (err ErrReachLimitOfRepo) Unwrap() error {
return util.ErrPermissionDenied
}
// ErrRepoAlreadyExist represents a "RepoAlreadyExist" kind of error.
type ErrRepoAlreadyExist struct {
Uname string
@ -79,6 +83,10 @@ func (err ErrRepoAlreadyExist) Error() string {
return fmt.Sprintf("repository already exists [uname: %s, name: %s]", err.Uname, err.Name)
}
func (err ErrRepoAlreadyExist) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrRepoFilesAlreadyExist represents a "RepoFilesAlreadyExist" kind of error.
type ErrRepoFilesAlreadyExist struct {
Uname string
@ -95,6 +103,10 @@ func (err ErrRepoFilesAlreadyExist) Error() string {
return fmt.Sprintf("repository files already exist [uname: %s, name: %s]", err.Uname, err.Name)
}
func (err ErrRepoFilesAlreadyExist) Unwrap() error {
return util.ErrAlreadyExist
}
// CheckCreateRepository check if could created a repository
func CheckCreateRepository(doer, u *user_model.User, name string, overwriteOrAdopt bool) error {
if !doer.CanCreateRepo() {