What you want to use is backrefs.
https://docs.ansible.com/ansible/latest/collections/ansible/builtin/lineinfile_module.html
An Example from the document:
# NOTE: Yaml requires escaping backslashes in double quotes but not in single
quotes
- name: Ensure the JBoss memory settings are exactly as needed
ansible.builtin.lineinfile:
path: /opt/jboss-as/bin/standalone.conf
regexp: '^(.*)Xms(\d+)m(.*)$'
line: '\1Xms${xms}m\3'
backrefs: yes
From: dulhaver via Ansible Project <[email protected]>
Sent: Thursday, July 27, 2023 10:12 AM
To: [email protected]
Subject: [EXTERNAL] Re: [ansible-project] edit string in a multi-line file
curious actually how this can be achieved with sophisticated regex and the
lineinfile module
On 07/27/2023 4:08 PM CEST dulhaver via Ansible Project
<[email protected]> wrote:
would this do what you want?
- name: edit a line in a file
ansible.builtin.command:
chdir: /home/username/
cmd: 'sed -i "s/This is a file/This is a new file/" somefile'
On 07/27/2023 3:13 PM CEST Kathy L <[email protected]> wrote:
I am trying to edit a string in a multi-line file. For instance, if I had this
string:
This is a file and I am editing it
I want to add the string "new" in front of file if it does not exist already.
I've tried lineinfile, but the issue is that I don't know what else is on the
line. There could be more data after "This is a file and I am editing it" that
I don't want to change. What is the best way to do this?
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