alertmanager_checksum_url Gives error after commit from 7 day ago

[debeste123]

What happened? After commit https://github.com/cloudalchemy/ansible-alertmanager/commit/6f050af066c541ca85db79c13b69b1defe801ac5 I received following error:

`TASK [ansible-alertmanager : Get checksum for amd64 architecture] ************** fatal: [promcmt-test01]: FAILED! => {"msg": "template error while templating string: expected token 'end of print statement', got 'select'. String: {{ lookup('url', 'https://github.com/prometheus/alertmanager/releases/download/v' + alertmanager_version + '/sha256sums.txt', wantlist=True) | list select('contains', 'linux-' + go_arch + '.tar.gz') | list | first).split(' ')[0] }}"} ...ignoring

TASK [ansible-alertmanager : Checksum lookup error message] ******************** fatal: [promcmt-test01]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'alertmanager_checksum_url' is undefined\n\nThe error appears to be in '/tmp/awx_183634_xomgifxg/requirements_roles/ansible-alertmanager/tasks/preflight.yml': line 51, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Checksum lookup error message\n ^ here\n"}`

Did you expect to see some different?

How to reproduce it (as minimally and precisely as possible):

Get latest version of amd64 alertmanager installed

Environment

• Role version:

0.21 Insert release version/galaxy tag or Git SHA here

• Ansible version information:

  ansible --version

• Variables:

insert role variables relevant to the issue

• Ansible playbook execution Logs:

insert Ansible logs relevant to the issue here

Anything else we need to know?:

[yzdann]

https://github.com/cloudalchemy/ansible-alertmanager/pull/151

[debeste123]

@yzdann Can you create a tag, from before this new update?

[SuperQ]

This role has been deprecated in favor of a the prometheus-community/ansible collection.