Ansible how to use tasks multiple times in different roles? - ansible

Question

I have 3 tasks that will get the version from the database and I have 3 roles inside these roles few tasks have a dependency on the version.
I can't use a variable here because the value is dynamic and I cant set facts because I should be able to run individual roles and only a few tasks from each role with tags.
My Example below.
Role1:-
Tasks I need to run multiple times(example):-
- name: get version
block:
- command: "mongo get_version.js"
register: op
- name: filter version number from output
shell: "echo {{ present_version.stdout }}| grep 'version'"
register: present_version
tags: role1_db_tag
- name: do something
- name: do something when a version is something
when: present_version == "something"
tags: role1_db_tag
Role2:
- name: get version
block:
- command: "mongo get_version.js"
register: op
- name: filter version number from output
shell: "echo {{ present_version.stdout }}| grep 'version'"
register: present_version
tags: role2_db_tag
- name: do some other things
- name: do something else when a version is something
when: present_version == "something"
tags: role2_db_tag
Now I am running the get version tasks 3 times in each role now.
Is there any way like handlers just to mention some name for these repetitive tasks and call when required?
Expecting:-
Role2:
- name: fetch version
function: get_version
register: present_version
tags: role1_db_tag
- name: do something else when a version is something
when: present_version == "something"
tags: role2_db_tag
PS: Is there a better way than include_* or import_*.

Answer 1

As you have already surmised, the way you would typically handle this is by moving the get version task into a separate role, and then including that in the dependent roles using e.g. import_role:
- import_role:
name: get_version
If you have a number of small shared tasks, you can create a "library" role with multiple task files:
- import_role:
name: library
tasks_from: get_version
See "Using Roles" for a discussion of include_role vs import_role.
You can get similar behavior by adding a dependency to your role
instead. E.g., in Role1, create a file meta/main.yml with the
following content:
dependencies:
- get_version
This will automatically run the get_version role before role1 any
time you run role1.
See "Using Role Dependencies" for more information.