Jinja 转义评论标签的开头

9uz*_*an7 7 template-engine templating jinja2 ansible

我正在尝试在 jinja 模板中创建 bash 脚本。我有以下几行:

SOME_ARRAY_COUNT=${#SOME_ARRAY[@]}
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但它会抛出一个错误:

AnsibleError: template error while templating string: Missing end of comment tag
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经过调查,我发现{% raw %}...{% endraw %}可以使用块来获取文字,但它仍然无法{#获得类似的错误:

An unhandled exception occurred while templating
Error was a <class 'ansible.errors.AnsibleError'>, original message: template error while templating string: Missing end of comment tag
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有没有解决这个问题而不改变 bash 逻辑的方法?

谢谢

更新:包括示例

Ansible 剧本:

... more ansible playbook stuff ...    

tasks:
- name: create script 
  template:
    src: "src/path/to/script.sh.j2"
    dest: "dest/path/to/output/script.sh"

- name: user data script as string
  set_fact:
    userdata: "{{ lookup('file', 'path/to/script.sh') }}"

- name: some cloudformation thing
  cloudformation:
    stack_name: "stack_name"
    state: present
    region: "some region"
    template: "path/to/template/cloudformation.json"
    template_parameters:
      ... a bunch of params ...
      UserDataScript: "{{ userdata }}"
    tags:
      ... tags ..
      metadata: "... metadata ..."
  register: cloudformation_results
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jinja 模板(script.sh.j2):

... more script stuff ...

SOME_ARRAY="some array with elements"
SOME_ARRAY=($SOME_ARRAY)
SOME_ARRAY_COUNT=${#SOME_ARRAY[@]}

... more script stuff ...
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问题:

此行:SOME_ARRAY_COUNT=${#SOME_ARRAY[@]}导致第一个模板任务请求结束#}注释标签。首先修复添加原始块:

{% raw %}
SOME_ARRAY_COUNT=${#SOME_ARRAY[@]}
{% endraw %}
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修复了模板部分,但 cloudformation 模块还应用了模板替换,因此会出现相同的错误。

修复:

{% raw %}
SOME_ARRAY_COUNT=${{ '{#' }}SOME_ARRAY[@]}
{% endraw %}
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第一个模板模块删除原始块并保留{{ '{$' }},cloudformation 模块查找{{ '{$' }}并应用文字替换。

lar*_*sks 7

如果我把它放入script.sh

SOME_ARRAY="some array with elements"
SOME_ARRAY=($SOME_ARRAY)
{% raw %}
SOME_ARRAY_COUNT=${#SOME_ARRAY[@]}
{% endraw %}
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这变成playbook.yml

---
- hosts: localhost
  gather_facts: false

  tasks:
    - name: create script
      template:
        src: ./script.sh.j2
        dest: ./script.sh
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当我运行时ansible-playbook playbook.yml,我得到输出:

PLAY [localhost] *************************************************************************************************************************************************************

TASK [create script] *********************************************************************************************************************************************************
changed: [localhost]
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看起来script.sh像:

SOME_ARRAY="some array with elements"
SOME_ARRAY=($SOME_ARRAY)

SOME_ARRAY_COUNT=${#SOME_ARRAY[@]}
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据我所知,一切似乎都按预期进行。