ansible/roles/grub_cmdline/tasks/main.yaml

---
# Copyright (C) SchedMD LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- name: Handle append GRUB_CMDLINE_LINUX arguments
  block:
  - name: Get current GRUB_CMDLINE_LINUX arguments
    ansible.builtin.shell:
      cmd: |
        grep -E "^GRUB_CMDLINE_LINUX=.*" {{ grub_cmdline_file }} |
        sed -e "s/^GRUB_CMDLINE_LINUX=//" -e "s/^\"//" -e "s/\"$//"
    register: grub_args

  - name: Set facts
    ansible.builtin.set_fact:
      grub_cmdline_args: |
        {{ (grub_args.stdout.split(' ') + grub_cmdline_args) | unique }}
  when:
  - not grub_cmdline_replace
  - grub_cmdline_args | length > 0

- name: Set GRUB_CMDLINE_LINUX arguments
  ansible.builtin.lineinfile:
    dest: '{{ grub_cmdline_file }}'
    regexp: ^GRUB_CMDLINE_LINUX=.*$
    line: GRUB_CMDLINE_LINUX="{{ grub_cmdline_args | join(' ') }}"
    state: present
    backup: true
  notify: Update Grub2 ({{ ansible_os_family }} Family)