Insert a line on each findings from given file using ansible playbook - ansible

Question

I want to add the line "*{My-Dept$2}" in file.yaml after *{My-Dept$1} this on every finding, I was able to find a line that starts with *{My-Dept$1} and inserted only one time, and ended with this trouble.
I have this in Multiple lines in the file and wanted to insert after "*{My-Dept$1}".
The reference are below:
Infrastructure:
- *{My-Dept$0}
- *{My-Dept$1}
Applications:
- *{My-Dept$1}
- *{My-Dept$3}
- *{My-Dept$4}
Database:
- *{My-Dept$0}
- *{My-Dept$1}
- *{My-Dept$3}
With the below code i was able to add the line "- *{My-Dept$2}" after only in the last "Database arry " entry.
- name: Add missing Dept
lineinfile:
dest: ./file.yaml
insertafter: '[*{]My-Dept[$]1[}]' #
line: ' - *{My-Dept$2}'
and the Output:
Infrastructure:
- *{My-Dept$0}
- *{My-Dept$1}
Applications:
- *{My-Dept$1}
- *{My-Dept$3}
- *{My-Dept$4}
Database:
- *{My-Dept$0}
- *{My-Dept$1}
- *{My-Dept$2}
- *{My-Dept$3}
I wish to get "*{My-Dept$2}" on every next line of each of the findings of *{My-Dept$1} entries. Most of the search find talks about replace, but my requirement is to insert multiple times on each finding.

Answer 1

Make the file.yaml valid YAML. For example
shell> cat file.yaml
---
Infrastructure:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
Applications:
- '*{My-Dept$1}'
- '*{My-Dept$3}'
- '*{My-Dept$4}'
Database:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
- '*{My-Dept$3}'
Q: "Put *{My-Dept$2} on every next line of each of the findings of *{My-Dept$1} entries."
A: It's possible to edit the file on your own.
Read the variables from the file into a dictionary. For examle
- include_vars:
file: file.yaml
name: my_dict
- debug:
var: my_dict
gives
my_dict:
Applications:
- '*{My-Dept$1}'
- '*{My-Dept$3}'
- '*{My-Dept$4}'
Database:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
- '*{My-Dept$3}'
Infrastructure:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
Modify the data. For example
- set_fact:
my_dict1: "{{ my_dict1|default({})|
combine({item: (my_dict[item] + add_items)|unique|sort}) }}"
loop: "{{ my_dict.keys()|list }}"
vars:
add_items:
- '*{My-Dept$2}'
- debug:
var: my_dict1
gives
my_dict1:
Applications:
- '*{My-Dept$1}'
- '*{My-Dept$2}'
- '*{My-Dept$3}'
- '*{My-Dept$4}'
Database:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
- '*{My-Dept$2}'
- '*{My-Dept$3}'
Infrastructure:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
- '*{My-Dept$2}'
Create template
shelll> cat file.yaml.j2
---
{% for k,v in my_dict1.items() %}
{{ k }}:
{% for item in v %}
- '{{ item }}'
{% endfor %}
{% endfor %}
Write the modified data into the file
- template:
src: file.yaml.j2
dest: file.yaml
gives
shell> cat file.yaml
---
Infrastructure:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
- '*{My-Dept$2}'
Applications:
- '*{My-Dept$1}'
- '*{My-Dept$2}'
- '*{My-Dept$3}'
- '*{My-Dept$4}'
Database:
- '*{My-Dept$0}'
- '*{My-Dept$1}'
- '*{My-Dept$2}'
- '*{My-Dept$3}'