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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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GPG key ID: 4AEE18F83AFDEB23
48 changed files with 545 additions and 20 deletions
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85
models/error.go
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@ -10,6 +10,7 @@ import (
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/util"
)
// ErrUserOwnRepos represents a "UserOwnRepos" kind of error.
@ -63,8 +64,8 @@ type ErrNoPendingRepoTransfer struct {
RepoID int64
}
func (e ErrNoPendingRepoTransfer) Error() string {
return fmt.Sprintf("repository doesn't have a pending transfer [repo_id: %d]", e.RepoID)
func (err ErrNoPendingRepoTransfer) Error() string {
return fmt.Sprintf("repository doesn't have a pending transfer [repo_id: %d]", err.RepoID)
}
// IsErrNoPendingTransfer is an error type when a repository has no pending
@ -74,6 +75,10 @@ func IsErrNoPendingTransfer(err error) bool {
return ok
}
func (err ErrNoPendingRepoTransfer) Unwrap() error {
return util.ErrNotExist
}
// ErrRepoTransferInProgress represents the state of a repository that has an
// ongoing transfer
type ErrRepoTransferInProgress struct {
@ -91,6 +96,10 @@ func (err ErrRepoTransferInProgress) Error() string {
return fmt.Sprintf("repository is already being transferred [uname: %s, name: %s]", err.Uname, err.Name)
}
func (err ErrRepoTransferInProgress) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrInvalidCloneAddr represents a "InvalidCloneAddr" kind of error.
type ErrInvalidCloneAddr struct {
Host string
@ -124,6 +133,10 @@ func (err *ErrInvalidCloneAddr) Error() string {
return fmt.Sprintf("migration/cloning from '%s' is not allowed", err.Host)
}
func (err *ErrInvalidCloneAddr) Unwrap() error {
return util.ErrInvalidArgument
}
// ErrUpdateTaskNotExist represents a "UpdateTaskNotExist" kind of error.
type ErrUpdateTaskNotExist struct {
UUID string
@ -139,6 +152,10 @@ func (err ErrUpdateTaskNotExist) Error() string {
return fmt.Sprintf("update task does not exist [uuid: %s]", err.UUID)
}
func (err ErrUpdateTaskNotExist) Unwrap() error {
return util.ErrNotExist
}
// ErrInvalidTagName represents a "InvalidTagName" kind of error.
type ErrInvalidTagName struct {
TagName string
@ -154,6 +171,10 @@ func (err ErrInvalidTagName) Error() string {
return fmt.Sprintf("release tag name is not valid [tag_name: %s]", err.TagName)
}
func (err ErrInvalidTagName) Unwrap() error {
return util.ErrInvalidArgument
}
// ErrProtectedTagName represents a "ProtectedTagName" kind of error.
type ErrProtectedTagName struct {
TagName string
@ -169,6 +190,10 @@ func (err ErrProtectedTagName) Error() string {
return fmt.Sprintf("release tag name is protected [tag_name: %s]", err.TagName)
}
func (err ErrProtectedTagName) Unwrap() error {
return util.ErrPermissionDenied
}
// ErrRepoFileAlreadyExists represents a "RepoFileAlreadyExist" kind of error.
type ErrRepoFileAlreadyExists struct {
Path string
@ -184,6 +209,10 @@ func (err ErrRepoFileAlreadyExists) Error() string {
return fmt.Sprintf("repository file already exists [path: %s]", err.Path)
}
func (err ErrRepoFileAlreadyExists) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrRepoFileDoesNotExist represents a "RepoFileDoesNotExist" kind of error.
type ErrRepoFileDoesNotExist struct {
Path string
@ -200,6 +229,10 @@ func (err ErrRepoFileDoesNotExist) Error() string {
return fmt.Sprintf("repository file does not exist [path: %s]", err.Path)
}
func (err ErrRepoFileDoesNotExist) Unwrap() error {
return util.ErrNotExist
}
// ErrFilenameInvalid represents a "FilenameInvalid" kind of error.
type ErrFilenameInvalid struct {
Path string
@ -215,6 +248,10 @@ func (err ErrFilenameInvalid) Error() string {
return fmt.Sprintf("path contains a malformed path component [path: %s]", err.Path)
}
func (err ErrFilenameInvalid) Unwrap() error {
return util.ErrInvalidArgument
}
// ErrUserCannotCommit represents "UserCannotCommit" kind of error.
type ErrUserCannotCommit struct {
UserName string
@ -230,6 +267,10 @@ func (err ErrUserCannotCommit) Error() string {
return fmt.Sprintf("user cannot commit to repo [user: %s]", err.UserName)
}
func (err ErrUserCannotCommit) Unwrap() error {
return util.ErrPermissionDenied
}
// ErrFilePathInvalid represents a "FilePathInvalid" kind of error.
type ErrFilePathInvalid struct {
Message string
@ -251,6 +292,10 @@ func (err ErrFilePathInvalid) Error() string {
return fmt.Sprintf("path is invalid [path: %s]", err.Path)
}
func (err ErrFilePathInvalid) Unwrap() error {
return util.ErrInvalidArgument
}
// ErrFilePathProtected represents a "FilePathProtected" kind of error.
type ErrFilePathProtected struct {
Message string
@ -270,6 +315,10 @@ func (err ErrFilePathProtected) Error() string {
return fmt.Sprintf("path is protected and can not be changed [path: %s]", err.Path)
}
func (err ErrFilePathProtected) Unwrap() error {
return util.ErrPermissionDenied
}
// __________ .__
// \______ \____________ ____ ____ | |__
// | | _/\_ __ \__ \ / \_/ ___\| | \
@ -292,6 +341,10 @@ func (err ErrBranchDoesNotExist) Error() string {
return fmt.Sprintf("branch does not exist [name: %s]", err.BranchName)
}
func (err ErrBranchDoesNotExist) Unwrap() error {
return util.ErrNotExist
}
// ErrBranchAlreadyExists represents an error that branch with such name already exists.
type ErrBranchAlreadyExists struct {
BranchName string
@ -307,6 +360,10 @@ func (err ErrBranchAlreadyExists) Error() string {
return fmt.Sprintf("branch already exists [name: %s]", err.BranchName)
}
func (err ErrBranchAlreadyExists) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrBranchNameConflict represents an error that branch name conflicts with other branch.
type ErrBranchNameConflict struct {
BranchName string
@ -322,6 +379,10 @@ func (err ErrBranchNameConflict) Error() string {
return fmt.Sprintf("branch conflicts with existing branch [name: %s]", err.BranchName)
}
func (err ErrBranchNameConflict) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrBranchesEqual represents an error that branch name conflicts with other branch.
type ErrBranchesEqual struct {
BaseBranchName string
@ -338,6 +399,10 @@ func (err ErrBranchesEqual) Error() string {
return fmt.Sprintf("branches are equal [head: %sm base: %s]", err.HeadBranchName, err.BaseBranchName)
}
func (err ErrBranchesEqual) Unwrap() error {
return util.ErrInvalidArgument
}
// ErrDisallowedToMerge represents an error that a branch is protected and the current user is not allowed to modify it.
type ErrDisallowedToMerge struct {
Reason string
@ -353,6 +418,10 @@ func (err ErrDisallowedToMerge) Error() string {
return fmt.Sprintf("not allowed to merge [reason: %s]", err.Reason)
}
func (err ErrDisallowedToMerge) Unwrap() error {
return util.ErrPermissionDenied
}
// ErrTagAlreadyExists represents an error that tag with such name already exists.
type ErrTagAlreadyExists struct {
TagName string
@ -368,6 +437,10 @@ func (err ErrTagAlreadyExists) Error() string {
return fmt.Sprintf("tag already exists [name: %s]", err.TagName)
}
func (err ErrTagAlreadyExists) Unwrap() error {
return util.ErrAlreadyExist
}
// ErrSHADoesNotMatch represents a "SHADoesNotMatch" kind of error.
type ErrSHADoesNotMatch struct {
Path string
@ -400,6 +473,10 @@ func (err ErrSHANotFound) Error() string {
return fmt.Sprintf("sha not found [%s]", err.SHA)
}
func (err ErrSHANotFound) Unwrap() error {
return util.ErrNotExist
}
// ErrCommitIDDoesNotMatch represents a "CommitIDDoesNotMatch" kind of error.
type ErrCommitIDDoesNotMatch struct {
GivenCommitID string
@ -446,6 +523,10 @@ func (err ErrInvalidMergeStyle) Error() string {
err.ID, err.Style)
}
func (err ErrInvalidMergeStyle) Unwrap() error {
return util.ErrInvalidArgument
}
// ErrMergeConflicts represents an error if merging fails with a conflict
type ErrMergeConflicts struct {
Style repo_model.MergeStyle