go write string to file

package file

import (
    "os"
    "path/filepath"
)

func WriteToFile(file string, str string) error{
    dir := filepath.Dir(file)
    if _, err := os.Stat(dir);os.IsNotExist(err) {
        os.MkdirAll(dir, 0755)
    }
    f, err := os.OpenFile(file, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
    if err != nil {
        return err
    }
    defer f.Close()
    if _, err = f.WriteString(str + "\n"); err != nil {
        return err
    }
    return f.Sync()
}

context

• write string to file by append
• if file not exists, create it (create dir first then create file by openFile option os.O_CREATE)
• close file by defer
• commit file change by f.Sync()