在 Go 中为 IO 操作添加助手是不好的做法吗？

Question

我来自 C# 背景，并使用来自 System.IO 命名空间的 File.ReadAllLines 和 File.WriteAllLines 等 IO 方法。得知 Go 没有这些 IO 操作的便利函数时，我有点惊讶。为了避免代码重复，我编写了以下帮助程序。有什么理由不这样做吗？

// WriteBytes writes the passed in bytes to the specified file. Before writing,
// if the file already exists, deletes all of its content; otherwise, creates
// the file.
func WriteBytes(filepath string, bytes []byte) (err error) {
    file, err := os.Create(filepath)
    if err != nil {
        return err
    }
    defer closeWithErrorPropagation(file, &err)

    _, err = file.Write(bytes)
    if err != nil {
        return err
    }

    return err
}

// WriteString writes the passed in sting to the specified file. Before writing,
// if the file already exists, deletes all of its content; otherwise, creates
// the file.
func WriteString(filepath string, text string) (err error) {
    file, err := os.Create(filepath)
    if err != nil {
        return err
    }
    defer closeWithErrorPropagation(file, &err)

    _, err = file.WriteString(text)
    if err != nil {
        return err
    }

    return err
}

// WriteLines writes the passed in lines to the specified file. Before writing,
// if the file already exists, deletes all of its content; otherwise, creates
// the file.
func WriteLines(filepath string, lines []string) (err error) {
    file, err := os.Create(filepath)
    if err != nil {
        return err
    }
    defer closeWithErrorPropagation(file, &err)

    for _, line := range lines {
        _, err := file.WriteString(fmt.Sprintln(line))
        if err != nil {
            return err
        }
    }

    return err
}

func closeWithErrorPropagation(c io.Closer, err *error) {
    if closerErr := c.Close(); closerErr != nil && *err == nil { // Only propagate the closer error if there isn't already an earlier error.
        *err = closerErr
    }
}

Answer 1

os.WriteFile 可以处理 WriteBytes 和 WriteString 函数的等效功能：

// func WriteBytes(filepath string, bytes []byte) (err error)

err = os.WriteFile("testdata/hello", []byte("Hello, Gophers!"), 0666)


// func WriteString(filepath string, text string) (err error)

text := "Hello, Gophers!"
err = os.WriteFile("testdata/hello", []byte(text), 0666)

并结合strings.Join可以处理WriteLines：

//func WriteLines(filepath string, lines []string) (err error)

lines := []string{"hello", "gophers!"}
err = os.WriteFile("testdata/hello", []byte(strings.Join(lines, "\n")), 0666)