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
|
package install
import (
"bufio"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
)
func lineInFile(name string, lookFor string) bool {
f, err := os.Open(name)
if err != nil {
return false
}
defer f.Close()
r := bufio.NewReader(f)
prefix := []byte{}
for {
line, isPrefix, err := r.ReadLine()
if err == io.EOF {
return false
}
if err != nil {
return false
}
if isPrefix {
prefix = append(prefix, line...)
continue
}
line = append(prefix, line...)
if string(line) == lookFor {
return true
}
prefix = prefix[:0]
}
}
func createFile(name string, content string) error {
// make sure file directory exists
if err := os.MkdirAll(filepath.Dir(name), 0775); err != nil {
return err
}
// create the file
f, err := os.Create(name)
if err != nil {
return err
}
defer f.Close()
// write file content
_, err = f.WriteString(fmt.Sprintf("%s\n", content))
return err
}
func appendToFile(name string, content string) error {
f, err := os.OpenFile(name, os.O_RDWR|os.O_APPEND, 0)
if err != nil {
return err
}
defer f.Close()
_, err = f.WriteString(fmt.Sprintf("\n%s\n", content))
return err
}
func removeFromFile(name string, content string) error {
backup := name + ".bck"
err := copyFile(name, backup)
if err != nil {
return err
}
temp, err := removeContentToTempFile(name, content)
if err != nil {
return err
}
err = copyFile(temp, name)
if err != nil {
return err
}
return os.Remove(backup)
}
func removeContentToTempFile(name, content string) (string, error) {
rf, err := os.Open(name)
if err != nil {
return "", err
}
defer rf.Close()
wf, err := ioutil.TempFile("/tmp", "complete-")
if err != nil {
return "", err
}
defer wf.Close()
r := bufio.NewReader(rf)
prefix := []byte{}
for {
line, isPrefix, err := r.ReadLine()
if err == io.EOF {
break
}
if err != nil {
return "", err
}
if isPrefix {
prefix = append(prefix, line...)
continue
}
line = append(prefix, line...)
str := string(line)
if str == content {
continue
}
_, err = wf.WriteString(str + "\n")
if err != nil {
return "", err
}
prefix = prefix[:0]
}
return wf.Name(), nil
}
func copyFile(src string, dst string) error {
in, err := os.Open(src)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(dst)
if err != nil {
return err
}
defer out.Close()
_, err = io.Copy(out, in)
return err
}
|
