如何将多行字符串编组为 yaml 值

Question

我有一个结构

type Products struct {
    Name    string
    Version string
    Description     string
}

持有一个多行字符串常量作为Description字段的值，常量如下

const DEFAULT_DESCRIPTION = `Please add the description here without removing the literal block (|)
    Sample description will be as follows,
    Fixes for the following in rabbitmq transport
    (i)   Channel not closing issue in rabbitmq publisher
    (ii)  Performance improvements to the transport by introducing a channel pool (configurable) and parameterising queue and exchange creation.
    (iii) Allow configuring connection factory by name in target url`

然后我使用包gopkg.in/yaml.v2 来编组上述结构（其中包含上述常量作为其字段的值），如下所示

data, err = yaml.Marshal(updateDescriptorV3)

并使用os.file.Write() 将生成的yaml 内容写入文件 但是在上面生成的yaml 文件中，在literal_block 符号（|）之后存在一个额外的- 我做错了什么？

  description: |-
Please add the description here without removing the literal block (|)
Sample description will be as follows,
Fixes for the following in rabbitmq transport
(i)   Channel not closing issue in rabbitmq publisher
(ii)  Performance improvements to the transport by introducing a channel pool (configurable) and parameterising queue and exchange creation.
(iii) Allow configuring connection factory by name in target url

需要做些什么才能将上述常量作为yaml中的literal_block如下？

  description: |
Please add the description here without removing the literal block (|)
Sample description will be as follows,
Fixes for the following in rabbitmq transport
(i)   Channel not closing issue in rabbitmq publisher
(ii)  Performance improvements to the transport by introducing a channel pool (configurable) and parameterising queue and exchange creation.
(iii) Allow configuring connection factory by name in target url

Answer 1

它工作正常。您的多行字符串不会以换行符结尾，因此 YAML 有必要在解析时去除换行符。这正是|- 所做的。

如果您真的想要 |，只需在输入字符串的末尾添加一个换行符，但请注意功能差异。

有关在 YAML 中包含多行字符串的各种方法的完整说明，请参阅 this answer。