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
|
// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bufio"
"context"
"fmt"
"io"
"os"
"regexp"
)
// BlamePart represents block of blame - continuous lines with one sha
type BlamePart struct {
Sha string
Lines []string
}
// BlameReader returns part of file blame one by one
type BlameReader struct {
cmd *Command
output io.WriteCloser
reader io.ReadCloser
done chan error
lastSha *string
}
var shaLineRegex = regexp.MustCompile("^([a-z0-9]{40})")
// NextPart returns next part of blame (sequential code lines with the same commit)
func (r *BlameReader) NextPart() (*BlamePart, error) {
var blamePart *BlamePart
reader := bufio.NewReader(r.reader)
if r.lastSha != nil {
blamePart = &BlamePart{*r.lastSha, make([]string, 0)}
}
var line []byte
var isPrefix bool
var err error
for err != io.EOF {
line, isPrefix, err = reader.ReadLine()
if err != nil && err != io.EOF {
return blamePart, err
}
if len(line) == 0 {
// isPrefix will be false
continue
}
lines := shaLineRegex.FindSubmatch(line)
if lines != nil {
sha1 := string(lines[1])
if blamePart == nil {
blamePart = &BlamePart{sha1, make([]string, 0)}
}
if blamePart.Sha != sha1 {
r.lastSha = &sha1
// need to munch to end of line...
for isPrefix {
_, isPrefix, err = reader.ReadLine()
if err != nil && err != io.EOF {
return blamePart, err
}
}
return blamePart, nil
}
} else if line[0] == '\t' {
code := line[1:]
blamePart.Lines = append(blamePart.Lines, string(code))
}
// need to munch to end of line...
for isPrefix {
_, isPrefix, err = reader.ReadLine()
if err != nil && err != io.EOF {
return blamePart, err
}
}
}
r.lastSha = nil
return blamePart, nil
}
// Close BlameReader - don't run NextPart after invoking that
func (r *BlameReader) Close() error {
err := <-r.done
_ = r.reader.Close()
_ = r.output.Close()
return err
}
// CreateBlameReader creates reader for given repository, commit and file
func CreateBlameReader(ctx context.Context, repoPath, commitID, file string) (*BlameReader, error) {
cmd := NewCommandContextNoGlobals(ctx, "blame", "--porcelain").
AddDynamicArguments(commitID).
AddDashesAndList(file).
SetDescription(fmt.Sprintf("GetBlame [repo_path: %s]", repoPath))
reader, stdout, err := os.Pipe()
if err != nil {
return nil, err
}
done := make(chan error, 1)
go func(cmd *Command, dir string, stdout io.WriteCloser, done chan error) {
if err := cmd.Run(&RunOpts{
UseContextTimeout: true,
Dir: dir,
Stdout: stdout,
Stderr: os.Stderr,
}); err == nil {
stdout.Close()
}
done <- err
}(cmd, repoPath, stdout, done)
return &BlameReader{
cmd: cmd,
output: stdout,
reader: reader,
done: done,
}, nil
}
|
