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
201
202
203
204
205
206
207
208
209
210
211
212
|
// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"bufio"
"io"
"os"
"os/exec"
"strings"
"github.com/gogits/git"
"github.com/gogits/gogs/modules/base"
"github.com/gogits/gogs/modules/log"
)
// Diff line types.
const (
DIFF_LINE_PLAIN = iota + 1
DIFF_LINE_ADD
DIFF_LINE_DEL
DIFF_LINE_SECTION
)
const (
DIFF_FILE_ADD = iota + 1
DIFF_FILE_CHANGE
DIFF_FILE_DEL
)
type DiffLine struct {
LeftIdx int
RightIdx int
Type int
Content string
}
func (d DiffLine) GetType() int {
return d.Type
}
type DiffSection struct {
Name string
Lines []*DiffLine
}
type DiffFile struct {
Name string
Addition, Deletion int
Type int
IsBin bool
Sections []*DiffSection
}
type Diff struct {
TotalAddition, TotalDeletion int
Files []*DiffFile
}
func (diff *Diff) NumFiles() int {
return len(diff.Files)
}
const DIFF_HEAD = "diff --git "
func ParsePatch(reader io.Reader) (*Diff, error) {
scanner := bufio.NewScanner(reader)
var (
curFile *DiffFile
curSection = &DiffSection{
Lines: make([]*DiffLine, 0, 10),
}
leftLine, rightLine int
)
diff := &Diff{Files: make([]*DiffFile, 0)}
var i int
for scanner.Scan() {
line := scanner.Text()
// fmt.Println(i, line)
if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") {
continue
}
i = i + 1
// Diff data too large.
if i == 5000 {
log.Warn("Diff data too large")
return &Diff{}, nil
}
if line == "" {
continue
}
switch {
case line[0] == ' ':
diffLine := &DiffLine{Type: DIFF_LINE_PLAIN, Content: line, LeftIdx: leftLine, RightIdx: rightLine}
leftLine++
rightLine++
curSection.Lines = append(curSection.Lines, diffLine)
continue
case line[0] == '@':
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
ss := strings.Split(line, "@@")
diffLine := &DiffLine{Type: DIFF_LINE_SECTION, Content: line}
curSection.Lines = append(curSection.Lines, diffLine)
// Parse line number.
ranges := strings.Split(ss[len(ss)-2][1:], " ")
leftLine, _ = base.StrTo(strings.Split(ranges[0], ",")[0][1:]).Int()
rightLine, _ = base.StrTo(strings.Split(ranges[1], ",")[0]).Int()
continue
case line[0] == '+':
curFile.Addition++
diff.TotalAddition++
diffLine := &DiffLine{Type: DIFF_LINE_ADD, Content: line, RightIdx: rightLine}
rightLine++
curSection.Lines = append(curSection.Lines, diffLine)
continue
case line[0] == '-':
curFile.Deletion++
diff.TotalDeletion++
diffLine := &DiffLine{Type: DIFF_LINE_DEL, Content: line, LeftIdx: leftLine}
if leftLine > 0 {
leftLine++
}
curSection.Lines = append(curSection.Lines, diffLine)
case strings.HasPrefix(line, "Binary"):
curFile.IsBin = true
continue
}
// Get new file.
if strings.HasPrefix(line, DIFF_HEAD) {
fs := strings.Split(line[len(DIFF_HEAD):], " ")
a := fs[0]
curFile = &DiffFile{
Name: a[strings.Index(a, "/")+1:],
Type: DIFF_FILE_CHANGE,
Sections: make([]*DiffSection, 0, 10),
}
diff.Files = append(diff.Files, curFile)
// Check file diff type.
for scanner.Scan() {
switch {
case strings.HasPrefix(scanner.Text(), "new file"):
curFile.Type = DIFF_FILE_ADD
case strings.HasPrefix(scanner.Text(), "deleted"):
curFile.Type = DIFF_FILE_DEL
case strings.HasPrefix(scanner.Text(), "index"):
curFile.Type = DIFF_FILE_CHANGE
}
if curFile.Type > 0 {
break
}
}
}
}
return diff, nil
}
func GetDiff(repoPath, commitid string) (*Diff, error) {
repo, err := git.OpenRepository(repoPath)
if err != nil {
return nil, err
}
commit, err := repo.GetCommit(commitid)
if err != nil {
return nil, err
}
// First commit of repository.
if commit.ParentCount() == 0 {
rd, wr := io.Pipe()
go func() {
cmd := exec.Command("git", "show", commitid)
cmd.Dir = repoPath
cmd.Stdout = wr
cmd.Stdin = os.Stdin
cmd.Stderr = os.Stderr
cmd.Run()
wr.Close()
}()
defer rd.Close()
return ParsePatch(rd)
}
rd, wr := io.Pipe()
go func() {
c, _ := commit.Parent(0)
cmd := exec.Command("git", "diff", c.Id.String(), commitid)
cmd.Dir = repoPath
cmd.Stdout = wr
cmd.Stdin = os.Stdin
cmd.Stderr = os.Stderr
cmd.Run()
wr.Close()
}()
defer rd.Close()
return ParsePatch(rd)
}
|
