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how can one possibly match value of a variable through regex parameter in lineinfile module?

- name: emptyline before search
  lineinfile:
    dest: ~/file
    insertbefore: '^{{ search_text }}$'
    line: ''

I tried above with both single/double quotes around, it doesn't seem to work

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  • 1
    "It doesn't work" is rather unclear; what happens? Do you get an error message? Is it a task, a play etc.? Does the task finish with an "ok" (i.e. successful execution)? You should include more info. Also, what type of text is {{ search_text }}?
    – telometto
    Oct 9, 2022 at 17:17

1 Answer 1

1

For a file test.txt

hello
something
test
hello
something

a run of a test playbook like

---
- hosts: localhost
  become: false
  gather_facts: false

  vars:

    BEFORE: "test"

  tasks:

  - name: Add line before
    lineinfile:
      path: test.txt
      insertbefore: '^{{ BEFORE }}$'
      line: ''

results into an output of

hello
something

test
hello
something

the expected one.

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