YAML 多行字符串，同时保留缩进和换行

Question

背景：

这是一个使用模板从模板构建 yaml 文件的 Ansible 剧本。所以基本上我有一个 jinja2 模板文件，其中包含这样一行：

private_key: {{ myvar }}

Ansible 使用 yaml 来定义变量。所以我将像这样填写myvar 值。这里我使用|这个特殊字符来定义一个多行字符串：

myvar: |

        - "-----BEGIN PRIVATE KEY-----"
        - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
        - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
        - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
        - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
        - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
        - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
        - "zzzzzzzzzzzzzzzzzz="
        - "-----END PRIVATE KEY-----"

但是输出会修剪缩进：

  private_key:
- "-----BEGIN PRIVATE KEY-----"
- "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
- "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
- "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
- "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
- "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
- "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
- "zzzzzzzzzzzzzzzzzz="
- "-----END PRIVATE KEY-----"

由于输出文件本身就是一个yaml，所以我需要保留缩进。看来无论如何我都会失去缩进。

我需要最终结果看起来像这样完全：

  private_key:
    - "-----BEGIN PRIVATE KEY-----"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "zzzzzzzzzzzzzzzzzz="
    - "-----END PRIVATE KEY-----"

Answer 1

我在发布问题后立即在 Google 搜索中找到了答案。

本质上，yaml 字符串会去除缩进，所以在这种情况下，我们必须使用 Jinja 在它们被去除的地方插入空格。幸运的是，这非常容易做到：

在模板文件中，我替换了这个：

private_key: {{ myvar }}

有了这个：

private_key: {{ myvar | indent( width=4, indentfirst=True) }}

width 字段可以根据需要多少缩进空间进行调整。

实际的变量声明与我在问题中发布的完全一样。但是现在在模板中添加了缩进，我现在有了所需的缩进输出：

  private_key:
    - "-----BEGIN PRIVATE KEY-----"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "asdfasdfasdfasdfasdfasdfadfasdfasdfasdfasdfasdfssadf"
    - "zzzzzzzzzzzzzzzzzz="
    - "-----END PRIVATE KEY-----"