Ansible 在正则表达式之前插入 XML

Question

这是一个适用于 javascript/python 的示例正则表达式

<!--.*[\n\t].*LAST FILTER IN THE DEFINED CHAIN.*[\n\t].*-->

反对这份文件：

<filter>
    <filter-name>filter-plugin-dispatcher-before-dispatch-error</filter-name>
    <filter-class>com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter</filter-class>
    <init-param>
        <param-name>location</param-name>
        <param-value>before-dispatch</param-value>
    </init-param>
    <init-param>
        <param-name>dispatcher</param-name>
        <param-value>ERROR</param-value>
    </init-param>
</filter>
<filter>
    <filter-name>OktaLoginFilter<`enter code here`/filter-name>
    <filter-class>com.atlassian.jira.authenticator.okta.OktaLoginFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>OktaLoginFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
</filter-mapping>
<!-- =====================================================
     THIS MUST BE THE LAST FILTER IN THE DEFINED CHAIN
     ===================================================== -->
<filter>
    <filter-name>JiraLastFilter</filter-name>
    <filter-class>com.atlassian.jira.web.filters.JiraLastFilter</filter-class>
</filter>

现在我需要弄清楚如何使用 ansible 在上述模式之前正确插入一个 xml 块。

我曾尝试使用此模块：https://docs.ansible.com/ansible/latest/modules/blockinfile_module.html，目前对上述的尝试一直在使用配置

- name: Insert/Update XML surronded by cutsomer markers after the last </filter>
  blockinfile:
    path: "path to file "
    backup: true
    marker: "<!-- {mark} ANSIBLE SIGSCI MANAGED BLOCK -->"
    insertbefore: "(<!--.*[\n\t].*LAST FILTER IN THE DEFINED CHAIN.*[\n\t].*-->)"
    block: |
        <filter>
            <filter-name>sigSciFilter</filter-name>
            <filter-class>params</filter-class>
            <init-param>
                <param-name>rpcTimeout</param-name>
                <param-value>500</param-value>
            </init-param>
            <init-param>
                <param-name>params</param-name>
                <param-value>unix:/var/run/params</param-value>
            d</init-param>
        </filter>
        <filter-mapping>
            <filter-name>parms</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
  notify:
    - Restart Sigsci

但是，这个正则表达式模式不匹配文档中的任何内容，而是插入到文档的末尾。我不确定此模块中使用的风味正则表达式，但 lineinfile 模块允许使用 python 正则表达式，我想如果我插入一行，那会起作用，但我试图在匹配的正则表达式之前插入一个 xml 块.

Answer 1

如果您真的想为工作使用错误的工具，您可以使用-z 将grep 拆分为空字节而不是换行符。实际上，它将整个 XML 文件视为一行：

$ grep -zo '<!--.*LAST FILTER IN THE DEFINED CHAIN.*-->' yourfile
<!-- =====================================================
     THIS MUST BE THE LAST FILTER IN THE DEFINED CHAIN
     ===================================================== -->