---
- name: Read grub defaults
  ansible.builtin.slurp:
    src: /mnt/etc/default/grub
  register: configuration_grub_slurp

- name: Build grub command lines with LUKS args
  vars:
    grub_content: "{{ configuration_grub_slurp.content | b64decode }}"
    grub_cmdline_linux: >-
      {{
        grub_content
        | regex_findall('^GRUB_CMDLINE_LINUX=\"(.*)\"', multiline=True)
        | default([])
        | first
        | default('')
      }}
    grub_cmdline_default: >-
      {{
        grub_content
        | regex_findall('^GRUB_CMDLINE_LINUX_DEFAULT=\"(.*)\"', multiline=True)
        | default([])
        | first
        | default('')
      }}
    grub_cmdline_linux_list: >-
      {{
        grub_cmdline_linux.split()
        if grub_cmdline_linux | length > 0 else []
      }}
    grub_cmdline_default_list: >-
      {{
        grub_cmdline_default.split()
        if grub_cmdline_default | length > 0 else []
      }}
    luks_kernel_args_list: "{{ configuration_luks_kernel_args.split() }}"
    grub_cmdline_linux_new: >-
      {{
        (
          (
            grub_cmdline_linux_list
            | reject('match', '^rd\\.luks\\.(name|options|key)=' ~ configuration_luks_uuid ~ '=')
            | list
          )
          + luks_kernel_args_list
        )
        | unique
        | join(' ')
      }}
    grub_cmdline_default_new: >-
      {{
        (
          (
            grub_cmdline_default_list
            | reject('match', '^rd\\.luks\\.(name|options|key)=' ~ configuration_luks_uuid ~ '=')
            | list
          )
          + luks_kernel_args_list
        )
        | unique
        | join(' ')
      }}
  ansible.builtin.set_fact:
    configuration_grub_content: "{{ grub_content }}"
    configuration_grub_cmdline_linux: "{{ grub_cmdline_linux }}"
    configuration_grub_cmdline_default: "{{ grub_cmdline_default }}"
    configuration_grub_cmdline_linux_new: "{{ grub_cmdline_linux_new }}"
    configuration_grub_cmdline_default_new: "{{ grub_cmdline_default_new }}"

- name: Update GRUB_CMDLINE_LINUX_DEFAULT for LUKS
  ansible.builtin.lineinfile:
    path: /mnt/etc/default/grub
    regexp: "^GRUB_CMDLINE_LINUX_DEFAULT="
    line: 'GRUB_CMDLINE_LINUX_DEFAULT="{{ configuration_grub_cmdline_default_new }}"'