如何确保线存在并且没有Ansible LineinFile注释？ [英] How do you Ensure a Line Exists and is Uncommented with Ansible LineinFile?

问题描述

如何确保文件中存在特定行，并且不与ansible的'lineinfile'注释？

How do you ensure a specific line exists in a file and is uncommented with ansible's `lineinfile'

我要取消注释的行（在中.htaccess ）：

The line I want uncommented (in .htaccess):

#php_flag display_errors on

我使用了以下内容：

  - name: Make sure PHP Errors are turned on
    lineinfile: dest={{ www_path }}/.htaccess line="php_flag display_errors on"

推荐答案

实际上您的示例按如下方式工作：

Actually your example works as is:

.htaccess 文件：

#php_flag display_errors on

Ansible播放：

The ansible play:

- name: Make sure PHP Errors are turned on
  lineinfile: 
    dest: "{{ www_path }}/.htaccess"
    line: "php_flag display_errors on"

此游戏的ansible-playbook的结果：

Results of ansible-playbook with this play:

$ cat .htaccess
#php_flag display_errors on
php_flag display_errors on

如果文件开始加上注释行，您将看到第二行未注释。若要更正此问题，请使用与现有行匹配的正则表达式并将其替换：

If the file starts with the line commented you'll see a second line uncommented. To correct this, use a regexp that will match the existing line and replace it:

- lineinfile:
    dest: /Users/bwhaley/tmp/file
    regexp: '^#php_flag display_errors'
    line: 'php_flag display_errors'
    backrefs: yes

请注意，尽管使用 backrefs：是，如果您要取消注释的行尚未存在并已注释，则游戏不会有任何改变。

Note though that with backrefs: yes if the line you want uncommented is not already present and commented, the play will make no change at all.

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