Ansible：如何修复 to_nice_yaml 输出引号和换行符？

Question

我有这个 YAML 文件（我将我的问题提炼到最低限度）：

scalar: simple_value
empty:
list:
  - 1
  - 2
  - 3
complex:
  - first:
      one: 1
      two: 2
  - second:
      one: 3
      two: 4
weird: "{{ '{{' }} something {{ '}}' }}"
weirder: "{{ '{{' }} 'TTT' if something == 'blah' else 'FFF' {{ '}}' }}"
weirdest: "&lcub2; ansible_date_time.year &rcub2;.&lcub2; ansible_date_time.month &rcub2;.&lcub2; ansible_date_time.day &rcub2;"

和这本剧本：

---
- hosts: localhost
  tasks:
    - name: Load
      include_vars:
        file: ./vars.yml
        name: object
    - name: Write
      copy:
        content: "{{ object | to_nice_yaml(indent=2) }}"
        dest: ./outv.yml

输出文件是这样的：

complex:
- first:
    one: 1
    two: 2
- second:
    one: 3
    two: 4
empty: null
list:
- 1
- 2
- 3
scalar: simple_value
weird: '{{ something }}'
weirder: '{{ ''TTT'' if something == ''blah'' else ''FFF'' }}'
weirdest: '&lcub2; ansible_date_time.year &rcub2;.&lcub2; ansible_date_time.month
  &rcub2;.&lcub2; ansible_date_time.day &rcub2;'

虽然我认为输出和输入列表缩进都是正确和等效的，并且 Jinja escaping 处理得当，但我不确定 weirder 的价值引用。而且我不明白 weirdest 值的换行符。

YAMLint 说没问题但实际上恢复了“正常”引号并在语法检查期间重新加入换行符。

有没有办法在过滤器 to_nice_yaml（或任何其他过滤器）中强制使用双引号？

有没有办法避免换行（或者可能有原因）？

Answer 1

关于您在 weirdest 中观察到的换行符，这在文档中有解释：

The to_yaml and to_nice_yaml filters use the PyYAML library which has a default 80 symbol string length limit. That causes unexpected line break after 80th symbol (if there is a space after 80th symbol) To avoid such behaviour and generate long lines, use the width option. You must use a hardcoded number to define the width, instead of a construction like float("inf"), because the filter does not support proxying Python functions.
For example:
{{ some_variable | to_yaml(indent=8, width=1337) }} 
{{ some_variable | to_nice_yaml(indent=8, width=1337) }}

^{来源：https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#formatting-data-yaml-and-json}

然后，在文档中的这个解释之后，他们还指出了一个事实：

The filter does support passing through other YAML parameters. For a full list, see the PyYAML documentation.

所以从那里得到双引号字符串：default_style='"'

可以找到更多详细信息 here。

因此，剧本：

- hosts: all
  gather_facts: no
      
  tasks:
    - copy:
        content:  "{{ object | to_nice_yaml(indent=2, width=1337, default_style='\"') }}"
        dest: ./outv.yml
      vars:
        object:
          scalar: simple_value
          empty:
          list:
            - 1
            - 2
            - 3
          complex:
            - first:
                one: 1
                two: 2
            - second:
                one: 3
                two: 4
          weird: "{{ '{{' }} something {{ '}}' }}"
          weirder: "{{ '{{' }} 'TTT' if something == 'blah' else 'FFF' {{ '}}' }}"
          weirdest: "&lcub2; ansible_date_time.year &rcub2;.&lcub2; ansible_date_time.month &rcub2;.&lcub2; ansible_date_time.day &rcub2;"

给出文件 outv.yml 包含：

"complex":
- "first":
    "one": !!int "1"
    "two": !!int "2"
- "second":
    "one": !!int "3"
    "two": !!int "4"
"empty": !!null "null"
"list":
- !!int "1"
- !!int "2"
- !!int "3"
"scalar": "simple_value"
"weird": "{{ something }}"
"weirder": "{{ 'TTT' if something == 'blah' else 'FFF' }}"
"weirdest": "&lcub2; ansible_date_time.year &rcub2;.&lcub2; ansible_date_time.month &rcub2;.&lcub2; ansible_date_time.day &rcub2;"

请注意，!!int 和 !!null 语法在 YAML 中称为 explicit typing，并在链接文档中进行了解释。

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