10 examples of 'golang append to file' in Go

12
func AppendString(newLine string, fileName string) {
13
	file, openError := os.OpenFile(fileName, os.O_APPEND|os.O_WRONLY, 0600)
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	ErrorCheck(openError)
15
	bytesWritten, writeError := file.Write([]byte(newLine + "\n"))
16
	fmt.Println(bytesWritten)
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	ErrorCheck(writeError)
18
}

131
func appendCommon() error {
132
	file, err := os.Create("./controllers/common/common.go")
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	if err != nil {
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		return errors.New("WebGen: Failed to common controller: " + err.Error())
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	}
136
	defer file.Close()
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	_, err = file.Write([]byte(commonFile))
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	if err != nil {
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		log.Println(err)
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	}
142
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	return nil
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}

31
func appendFile(filename string, data string) error {
32
	fp, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY, 0755)
33
	if err != nil {
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		return err
35
	}
36
	defer fp.Close()
37
38
	_, err = fp.WriteString(data)
39
	if err != nil {
40
		return err
41
	}
42
	return nil
43
}

1589
func appendToFile(filePath, stringToAppend string) error {
1590
	f, err := os.OpenFile(filePath, os.O_APPEND|os.O_WRONLY, 0644)
1591
	if err != nil {
1592
		return err
1593
	}
1594
	defer f.Close()
1595
1596
	_, err = f.WriteString(stringToAppend)
1597
	return err
1598
}

169
func (f *File) AppendBytes(data []byte) {
170
	file, err := os.OpenFile(f.filename, os.O_APPEND|os.O_WRONLY, 0644)
171
	if err != nil {
172
		f.err = err
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		return
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	}
175
	defer file.Close()
176
177
	if _, err := file.Write(data); err != nil {
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		f.err = err
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		return
180
	}
181
}

206
func AppendFile(fileName string, content string) error {
207
	bs, err := ReadAll(fileName)
208
	if err != nil {
209
		return errors.Wrapf(err, "read file %s failed", fileName)
210
	}
211
	if strings.Contains(string(bs), content) {
212
		return nil
213
	}
214
	err = WriteFile(fileName, []byte(fmt.Sprintf("%s\n%s", bs, content)))
215
	if err != nil {
216
		return errors.Wrapf(err, "write file %s failed", fileName)
217
	}
218
	return nil
219
}

86
func AppendToFile(path string, values string) error {
87
	EnsureDirectory(path)
88
	if _, err := os.Stat(path); err != nil {
89
		ioutil.WriteFile(path, []byte(""), os.ModePerm)
90
	}
91
	f, err := os.OpenFile(path, os.O_APPEND|os.O_WRONLY, 0666)
92
	if err != nil {
93
		return err
94
	}
95
	defer f.Close()
96
	f.WriteString("\n")
97
	_, err = f.WriteString(values)
98
	if err != nil {
99
		return err
100
	}
101
	return nil
102
}

351
func (cfg *Config) AddTextFile(filename, data string, mode uint) {
352
	addFile(cfg.AddRunCmd, filename, []byte(data), mode, false)
353
}

36
func Append(path string, r io.Reader) error {
37
	logger.Sugar.Debugf("append file: %s", path)
38
39
	f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
40
	if err != nil {
41
		return err
42
	}
43
	defer f.Close()
44
45
	bufSize := 1024
46
	buf := make([]byte, bufSize)
47
48
	for {
49
		n, err := r.Read(buf)
50
		if err == io.EOF {
51
			break
52
		}
53
		nw, e := f.Write(buf[:n])
54
		logger.Sugar.Debugf("Append: read %d bytes, write %d bytes, read err: %s, write err: %s", n, nw, err, e)
55
		if e != nil {
56
			return e
57
		}
58
	}
59
60
	return nil
61
}

121
func (this *FsStore) LogSavedFile(path string, content string) {
122
	util.FileAppendNewLine(path, content)
123
}