mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-05-04 19:01:57 +02:00
d68a613ba8
Currently only SHA1 repositories are supported by Gitea. This adds support for alternate SHA256 with the additional aim of easier support for additional hash types in the future. Fixes: #13794 Limited by: https://github.com/go-git/go-git/issues/899 Depend on: #28138 <img width="776" alt="图片" src="https://github.com/go-gitea/gitea/assets/81045/5448c9a7-608e-4341-a149-5dd0069c9447"> --------- Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com> Co-authored-by: 6543 <6543@obermui.de>
107 lines
2.2 KiB
Go
107 lines
2.2 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package git
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/hex"
|
|
"fmt"
|
|
)
|
|
|
|
type ObjectID interface {
|
|
String() string
|
|
IsZero() bool
|
|
RawValue() []byte
|
|
Type() ObjectFormat
|
|
}
|
|
|
|
/* SHA1 */
|
|
type Sha1Hash [20]byte
|
|
|
|
func (h *Sha1Hash) String() string {
|
|
return hex.EncodeToString(h[:])
|
|
}
|
|
|
|
func (h *Sha1Hash) IsZero() bool {
|
|
empty := Sha1Hash{}
|
|
return bytes.Equal(empty[:], h[:])
|
|
}
|
|
func (h *Sha1Hash) RawValue() []byte { return h[:] }
|
|
func (*Sha1Hash) Type() ObjectFormat { return Sha1ObjectFormat }
|
|
|
|
var _ ObjectID = &Sha1Hash{}
|
|
|
|
func MustIDFromString(hexHash string) ObjectID {
|
|
id, err := NewIDFromString(hexHash)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return id
|
|
}
|
|
|
|
/* SHA256 */
|
|
type Sha256Hash [32]byte
|
|
|
|
func (h *Sha256Hash) String() string {
|
|
return hex.EncodeToString(h[:])
|
|
}
|
|
|
|
func (h *Sha256Hash) IsZero() bool {
|
|
empty := Sha256Hash{}
|
|
return bytes.Equal(empty[:], h[:])
|
|
}
|
|
func (h *Sha256Hash) RawValue() []byte { return h[:] }
|
|
func (*Sha256Hash) Type() ObjectFormat { return Sha256ObjectFormat }
|
|
|
|
/* utility */
|
|
func NewIDFromString(hexHash string) (ObjectID, error) {
|
|
var theObjectFormat ObjectFormat
|
|
for _, objectFormat := range SupportedObjectFormats {
|
|
if len(hexHash) == objectFormat.FullLength() {
|
|
theObjectFormat = objectFormat
|
|
break
|
|
}
|
|
}
|
|
|
|
if theObjectFormat == nil {
|
|
return nil, fmt.Errorf("length %d has no matched object format: %s", len(hexHash), hexHash)
|
|
}
|
|
|
|
b, err := hex.DecodeString(hexHash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if len(b) != theObjectFormat.FullLength()/2 {
|
|
return theObjectFormat.EmptyObjectID(), fmt.Errorf("length must be %d: %v", theObjectFormat.FullLength(), b)
|
|
}
|
|
return theObjectFormat.MustID(b), nil
|
|
}
|
|
|
|
func IsEmptyCommitID(commitID string) bool {
|
|
if commitID == "" {
|
|
return true
|
|
}
|
|
|
|
id, err := NewIDFromString(commitID)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
return id.IsZero()
|
|
}
|
|
|
|
// ComputeBlobHash compute the hash for a given blob content
|
|
func ComputeBlobHash(hashType ObjectFormat, content []byte) ObjectID {
|
|
return hashType.ComputeHash(ObjectBlob, content)
|
|
}
|
|
|
|
type ErrInvalidSHA struct {
|
|
SHA string
|
|
}
|
|
|
|
func (err ErrInvalidSHA) Error() string {
|
|
return fmt.Sprintf("invalid sha: %s", err.SHA)
|
|
}
|