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gitea/modules/git/repo_tree_nogogit.go
Lunny Xiao 4eb2a29910
Improve ObjectFormat interface (#28496)
The 4 functions are duplicated, especially as interface methods. I think
we just need to keep `MustID` the only one and remove other 3.

```
MustID(b []byte) ObjectID
MustIDFromString(s string) ObjectID
NewID(b []byte) (ObjectID, error)
NewIDFromString(s string) (ObjectID, error)
```

Introduced the new interfrace method `ComputeHash` which will replace
the interface `HasherInterface`. Now we don't need to keep two
interfaces.

Reintroduced `git.NewIDFromString` and `git.MustIDFromString`. The new
function will detect the hash length to decide which objectformat of it.
If it's 40, then it's SHA1. If it's 64, then it's SHA256. This will be
right if the commitID is a full one. So the parameter should be always a
full commit id.

@AdamMajer Please review.
2023-12-19 07:20:47 +00:00

84 lines
1.7 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:build !gogit
package git
import (
"io"
)
func (repo *Repository) getTree(id ObjectID) (*Tree, error) {
wr, rd, cancel := repo.CatFileBatch(repo.Ctx)
defer cancel()
_, _ = wr.Write([]byte(id.String() + "\n"))
// ignore the SHA
_, typ, size, err := ReadBatchLine(rd)
if err != nil {
return nil, err
}
switch typ {
case "tag":
resolvedID := id
data, err := io.ReadAll(io.LimitReader(rd, size))
if err != nil {
return nil, err
}
tag, err := parseTagData(id.Type(), data)
if err != nil {
return nil, err
}
commit, err := tag.Commit(repo)
if err != nil {
return nil, err
}
commit.Tree.ResolvedID = resolvedID
return &commit.Tree, nil
case "commit":
commit, err := CommitFromReader(repo, id, io.LimitReader(rd, size))
if err != nil {
return nil, err
}
if _, err := rd.Discard(1); err != nil {
return nil, err
}
commit.Tree.ResolvedID = commit.ID
return &commit.Tree, nil
case "tree":
tree := NewTree(repo, id)
tree.ResolvedID = id
tree.entries, err = catBatchParseTreeEntries(repo.objectFormat, tree, rd, size)
if err != nil {
return nil, err
}
tree.entriesParsed = true
return tree, nil
default:
return nil, ErrNotExist{
ID: id.String(),
}
}
}
// GetTree find the tree object in the repository.
func (repo *Repository) GetTree(idStr string) (*Tree, error) {
if len(idStr) != repo.objectFormat.FullLength() {
res, err := repo.GetRefCommitID(idStr)
if err != nil {
return nil, err
}
if len(res) > 0 {
idStr = res
}
}
id, err := NewIDFromString(idStr)
if err != nil {
return nil, err
}
return repo.getTree(id)
}