How to do regex-replace in a file using Ansible?
Solution 1:
Why is the outcome \1030 instead of hello030?
The lineinfile module default is backrefs: false. Your regexp='^(hello)world$' matches the entire contents of file. Literal from line='\1030' replaces contents.
How to solve it?
- Turn on backrefs with
backrefs: true - Use a named group in
line:
A backref followed by numbers will not function as expected. You will need a named group instead. e.g. \g<1>
- name: Replace the world
lineinfile:
dest: file
regexp: '^(hello)world$'
line: '\g<1>030'
backrefs: true