Checking if filesystem supports d_type via Ansible

I had a task to add an assert to Ansible playbook to check that root / filesystem supports d_type (i.e. "directory entry type" and is important for Docker / Podman). Here is the result:

    - name: Read root filesystem type and device
      set_fact:
        root_fstype: "{{ ansible_mounts | selectattr('mount', 'equalto', '/') | map(attribute='fstype') | join(',') }}"
        root_device: "{{ ansible_mounts | selectattr('mount', 'equalto', '/') | map(attribute='device') | join(',') }}"
    - name: If root filesystem is xfs, get more info from it
      command:
        xfs_info "{{ root_device }}"
      register: xfs_info
      ignore_errors: true
      when: "root_fstype != 'ext4'"
    - name: Check that root filesystem supports directory entry type (aka d_type)
      assert:
        that:
          - "root_fstype == 'ext4' or ( root_fstype == 'xfs' and 'ftype=1' in xfs_info.stdout )"

First, we extract (more info on how we get one value from a list of dicts based on another value) root filesystem type (e.g. "ext4" or "xfs") and device (e.g. /dev/mapper/centos_something-root) from Ansible facts obtained by setup module (use ansible -u root -i inventory.ini -m setup all to see all the facts). Then we load additional info by xfs_info utility if the fs type is "xfs". And last step is finally to assert for d_type support: "ext4" is a clear win, when we got "xfs", "ftype=1" in xfs_info output is needed.