fmask.yml

- name: Mess with mount options
  hosts: localhost
  gather_facts: false
  tasks:

  - name: fmask is not present
    debug:
      msg:
        regexp1: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',?fmask=[0-7]?[0-7][0-7][0-7],?') }}"
        regexp2: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',fmask=[0-7]?[0-7][0-7][0-7]') | regex_replace('fmask=[0-7]?[0-7][0-7][0-7],') }}"
    vars:
      line: 'UUID=2DD0-F016 /boot/efi vfat defaults,uid=0,gid=0,umask=077,shortname=winnt'

  - name: fmask is at the beginning
    debug:
      msg:
        regexp1: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',?fmask=[0-7]?[0-7][0-7][0-7],?') }}"
        regexp2: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',fmask=[0-7]?[0-7][0-7][0-7]') | regex_replace('fmask=[0-7]?[0-7][0-7][0-7],') }}"
    vars:
      line: 'UUID=2DD0-F016 /boot/efi vfat fmask=000,defaults,uid=0,gid=0,umask=077,shortname=winnt'

  - name: fmask is at the end
    debug:
      msg:
        regexp1: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',?fmask=[0-7]?[0-7][0-7][0-7],?') }}"
        regexp2: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',fmask=[0-7]?[0-7][0-7][0-7]') | regex_replace('fmask=[0-7]?[0-7][0-7][0-7],') }}"
    vars:
      line: 'UUID=2DD0-F016 /boot/efi vfat defaults,uid=0,gid=0,umask=077,shortname=winnt,fmask=000'

  - name: fmask is in the middle
    debug:
      msg:
        regexp1: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',?fmask=[0-7]?[0-7][0-7][0-7],?') }}"
        regexp2: "{{ line }} => {{ line.split(' ')[3] | regex_replace(',fmask=[0-7]?[0-7][0-7][0-7]') | regex_replace('fmask=[0-7]?[0-7][0-7][0-7],') }}"
    vars:
      line: 'UUID=2DD0-F016 /boot/efi vfat defaults,fmask=000,uid=0,gid=0,umask=077,shortname=winnt'