mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-01 06:49:17 +08:00
102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package git
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
)
|
|
|
|
type ObjectFormatID int
|
|
|
|
const (
|
|
Sha1 ObjectFormatID = iota
|
|
)
|
|
|
|
// sha1Pattern can be used to determine if a string is an valid sha
|
|
var sha1Pattern = regexp.MustCompile(`^[0-9a-f]{4,40}$`)
|
|
|
|
type ObjectFormat interface {
|
|
ID() ObjectFormatID
|
|
String() string
|
|
|
|
// Empty is the hash of empty git
|
|
Empty() ObjectID
|
|
// EmptyTree is the hash of an empty tree
|
|
EmptyTree() ObjectID
|
|
// FullLength is the length of the hash's hex string
|
|
FullLength() int
|
|
|
|
IsValid(input string) bool
|
|
MustID(b []byte) ObjectID
|
|
MustIDFromString(s string) ObjectID
|
|
NewID(b []byte) (ObjectID, error)
|
|
NewIDFromString(s string) (ObjectID, error)
|
|
NewEmptyID() ObjectID
|
|
|
|
NewHasher() HasherInterface
|
|
}
|
|
|
|
type Sha1ObjectFormat struct{}
|
|
|
|
func (*Sha1ObjectFormat) ID() ObjectFormatID { return Sha1 }
|
|
func (*Sha1ObjectFormat) String() string { return "sha1" }
|
|
func (*Sha1ObjectFormat) Empty() ObjectID { return &Sha1Hash{} }
|
|
func (*Sha1ObjectFormat) EmptyTree() ObjectID {
|
|
return &Sha1Hash{
|
|
0x4b, 0x82, 0x5d, 0xc6, 0x42, 0xcb, 0x6e, 0xb9, 0xa0, 0x60,
|
|
0xe5, 0x4b, 0xf8, 0xd6, 0x92, 0x88, 0xfb, 0xee, 0x49, 0x04,
|
|
}
|
|
}
|
|
func (*Sha1ObjectFormat) FullLength() int { return 40 }
|
|
func (*Sha1ObjectFormat) IsValid(input string) bool {
|
|
return sha1Pattern.MatchString(input)
|
|
}
|
|
|
|
func (*Sha1ObjectFormat) MustID(b []byte) ObjectID {
|
|
var id Sha1Hash
|
|
copy(id[0:20], b)
|
|
return &id
|
|
}
|
|
|
|
func (h *Sha1ObjectFormat) MustIDFromString(s string) ObjectID {
|
|
return MustIDFromString(h, s)
|
|
}
|
|
|
|
func (h *Sha1ObjectFormat) NewID(b []byte) (ObjectID, error) {
|
|
return IDFromRaw(h, b)
|
|
}
|
|
|
|
func (h *Sha1ObjectFormat) NewIDFromString(s string) (ObjectID, error) {
|
|
return genericIDFromString(h, s)
|
|
}
|
|
|
|
func (*Sha1ObjectFormat) NewEmptyID() ObjectID {
|
|
return NewSha1()
|
|
}
|
|
|
|
func (h *Sha1ObjectFormat) NewHasher() HasherInterface {
|
|
return &Sha1Hasher{sha1.New()}
|
|
}
|
|
|
|
func ObjectFormatFromID(id ObjectFormatID) ObjectFormat {
|
|
switch id {
|
|
case Sha1:
|
|
return &Sha1ObjectFormat{}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func ObjectFormatFromString(hash string) (ObjectFormat, error) {
|
|
switch strings.ToLower(hash) {
|
|
case "sha1":
|
|
return &Sha1ObjectFormat{}, nil
|
|
}
|
|
|
|
return nil, fmt.Errorf("unknown hash type: %s", hash)
|
|
}
|