1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
package git
import (
"bytes"
"errors"
"fmt"
"strconv"
"time"
"gopkg.in/src-d/go-git.v3/core"
)
// ErrUnsupportedObject trigger when a non-supported object is being decoded.
var ErrUnsupportedObject = errors.New("unsupported object type")
// Object is a generic representation of any git object. It is implemented by
// Commit, Tree, Blob and Tag, and includes the functions that are common to
// them.
//
// Object is returned when an object could of any type. It is frequently used
// with a type cast to acquire the specific type of object:
//
// func process(obj Object) {
// switch o := obj.(type) {
// case *Commit:
// // o is a Commit
// case *Tree:
// // o is a Tree
// case *Blob:
// // o is a Blob
// case *Tag:
// // o is a Tag
// }
// }
//
// This interface is intentionally different from core.Object, which is a lower
// level interface used by storage implementations to read and write objects.
type Object interface {
ID() core.Hash
Type() core.ObjectType
Decode(core.Object) error
}
// Blob is used to store file data - it is generally a file.
type Blob struct {
Hash core.Hash
Size int64
obj core.Object
}
// ID returns the object ID of the blob. The returned value will always match
// the current value of Blob.Hash.
//
// ID is present to fulfill the Object interface.
func (b *Blob) ID() core.Hash {
return b.Hash
}
// Type returns the type of object. It always returns core.BlobObject.
//
// Type is present to fulfill the Object interface.
func (b *Blob) Type() core.ObjectType {
return core.BlobObject
}
// Decode transforms a core.Object into a Blob struct.
func (b *Blob) Decode(o core.Object) error {
if o.Type() != core.BlobObject {
return ErrUnsupportedObject
}
b.Hash = o.Hash()
b.Size = o.Size()
b.obj = o
return nil
}
// Reader returns a reader allow the access to the content of the blob
func (b *Blob) Reader() (core.ObjectReader, error) {
return b.obj.Reader()
}
// Signature represents an action signed by a person
type Signature struct {
Name string
Email string
When time.Time
}
// Decode decodes a byte slice into a signature
func (s *Signature) Decode(b []byte) {
open := bytes.IndexByte(b, '<')
close := bytes.IndexByte(b, '>')
if open == -1 || close == -1 {
return
}
s.Name = string(bytes.Trim(b[:open], " "))
s.Email = string(b[open+1 : close])
hasTime := close+2 < len(b)
if hasTime {
s.decodeTimeAndTimeZone(b[close+2:])
}
}
var timeZoneLength = 5
func (s *Signature) decodeTimeAndTimeZone(b []byte) {
space := bytes.IndexByte(b, ' ')
if space == -1 {
space = len(b)
}
ts, err := strconv.ParseInt(string(b[:space]), 10, 64)
if err != nil {
return
}
s.When = time.Unix(ts, 0).In(time.UTC)
var tzStart = space + 1
if tzStart >= len(b) || tzStart+timeZoneLength > len(b) {
return
}
tl, err := time.Parse("-0700", string(b[tzStart:tzStart+timeZoneLength]))
if err != nil {
return
}
s.When = s.When.In(tl.Location())
}
func (s *Signature) String() string {
return fmt.Sprintf("%s <%s>", s.Name, s.Email)
}
|
