---
- name: Something
  hosts: bigboot
  gather_facts: true

  vars:
    bigboot_boot_device: /dev/sda

    bigboot_test_var:
      key1: value1
      key2: value2
      key3: nope
      key4: 12345

  tasks:
    - name: Capture all logical volume paritions on /boot device
      ansible.builtin.shell:
        cmd: |
          set -o pipefail
          lsblk -pl -o name,type {{ bigboot_boot_device }} | grep -i lvm
        executable: /bin/bash
      changed_when: false
      failed_when: bigboot_adjacent_lvm['rc'] not in [0, 141]
      register: bigboot_adjacent_lvm

    - name: Map the device to its mount point if applicable
      ansible.builtin.set_fact:
        bigboot_adjacent_lvm_devices: "{{ bigboot_adjacent_lvm_devices | default([]) \
          | combine({item | split(' ') | first: ansible_facts['mounts'] \
          | selectattr('device', 'equalto', item | split(' ') | first) \
          | map(attribute='mount')}) }}"
      loop: "{{ bigboot_adjacent_lvm['stdout_lines'] }}"

    - name: Debug bigboot_adjacent_lvm_devices
      ansible.builtin.debug:
        var: bigboot_adjacent_lvm_devices

    - name: Debug - Capture the device name of the mounted logical volumes
      ansible.builtin.debug:
        msg: "{{ item['key'] }} :: {{ item['value'] }}"
      loop: "{{ bigboot_adjacent_lvm_devices | dict2items }}"

    - name: Debug - logic
      ansible.builtin.debug:
        msg: "{{ item['key'] }} :: {{ item['value'] }}"
      loop: "{{ bigboot_adjacent_lvm_devices | dict2items }}"
      when: item['value'] | regex_search('/[a-zA-Z]')

    - name: Capture the device name of the mounted logical volumes
      ansible.builtin.set_fact:
        bigboot_lvm_mounts: "{{ bigboot_lvm_mounts | default([]) + [item['key']] }}"
      loop: "{{ bigboot_adjacent_lvm_devices | dict2items }}"
      when: item['value'] | regex_search('[/a-zA-Z]')

    - name: Debug bigboot_lvm_mounts
      ansible.builtin.debug:
        var: bigboot_lvm_mounts

    # - name: Set adjacent LVM device name
    #   ansible.builtin.set_fact:
    #     bigboot_adjacent_lvm_device: "{{ bigboot_lvm_mounts | first }}"

    # - name: Debug bigboot_adjacent_lvm_device
    #   ansible.builtin.debug:
    #     var: bigboot_adjacent_lvm_device