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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
package packfile
import (
"bytes"
"encoding/hex"
"fmt"
"strconv"
"time"
"gopkg.in/src-d/go-git.v2/commons"
)
type Object interface {
Type() string
Hash() string
}
type Hash []byte
func (h Hash) String() string {
return hex.EncodeToString(h)
}
type Commit struct {
Tree Hash
Parents []Hash
Author Signature
Committer Signature
Message string
hash string
}
func NewCommit(b []byte) (*Commit, error) {
o := &Commit{hash: commons.GitHash("commit", b)}
lines := bytes.Split(b, []byte{'\n'})
for i := range lines {
if len(lines[i]) > 0 {
var err error
split := bytes.SplitN(lines[i], []byte{' '}, 2)
switch string(split[0]) {
case "tree":
o.Tree = make([]byte, 20)
_, err = hex.Decode(o.Tree, split[1])
case "parent":
h := make([]byte, 20)
_, err = hex.Decode(h, split[1])
if err == nil {
o.Parents = append(o.Parents, h)
}
case "author":
o.Author = NewSignature(split[1])
case "committer":
o.Committer = NewSignature(split[1])
}
if err != nil {
return nil, err
}
} else {
o.Message = string(bytes.Join(append(lines[i+1:]), []byte{'\n'}))
break
}
}
return o, nil
}
func (o *Commit) Type() string {
return "commit"
}
func (o *Commit) Hash() string {
return o.hash
}
type Signature struct {
Name string
Email string
When time.Time
}
func NewSignature(signature []byte) Signature {
ret := Signature{}
if len(signature) == 0 {
return ret
}
from := 0
state := 'n' // n: name, e: email, t: timestamp, z: timezone
for i := 0; ; i++ {
var c byte
var end bool
if i < len(signature) {
c = signature[i]
} else {
end = true
}
switch state {
case 'n':
if c == '<' || end {
if i == 0 {
break
}
ret.Name = string(signature[from : i-1])
state = 'e'
from = i + 1
}
case 'e':
if c == '>' || end {
ret.Email = string(signature[from:i])
i++
state = 't'
from = i + 1
}
case 't':
if c == ' ' || end {
t, err := strconv.ParseInt(string(signature[from:i]), 10, 64)
if err == nil {
ret.When = time.Unix(t, 0)
}
end = true
}
}
if end {
break
}
}
return ret
}
func (s *Signature) String() string {
return fmt.Sprintf("%q <%s> @ %s", s.Name, s.Email, s.When)
}
type Tree struct {
Entries []TreeEntry
hash string
}
type TreeEntry struct {
Name string
Hash string
}
func NewTree(body []byte) (*Tree, error) {
o := &Tree{hash: commons.GitHash("tree", body)}
if len(body) == 0 {
return o, nil
}
for {
split := bytes.SplitN(body, []byte{0}, 2)
split1 := bytes.SplitN(split[0], []byte{' '}, 2)
o.Entries = append(o.Entries, TreeEntry{
Name: string(split1[1]),
Hash: fmt.Sprintf("%x", split[1][0:20]),
})
body = split[1][20:]
if len(split[1]) == 20 {
break
}
}
return o, nil
}
func (o *Tree) Type() string {
return "tree"
}
func (o *Tree) Hash() string {
return o.hash
}
type Blob struct {
Len int
hash string
}
func NewBlob(b []byte) (*Blob, error) {
return &Blob{Len: len(b), hash: commons.GitHash("blob", b)}, nil
}
func (o *Blob) Type() string {
return "blob"
}
func (o *Blob) Hash() string {
return o.hash
}
type ContentCallback func(hash string, content []byte)
|
