lineinfile:
path: /etc/default/grub
regexp: '^#?GRUB_CMDLINE_LINUX='
- line: 'GRUB_CMDLINE_LINUX="{{ (install.kernel_cmdline or []).join(" ") }}"'
+ line: 'GRUB_CMDLINE_LINUX="{{ install.kernel_cmdline | join(" ") }}"'
when: install is defined and install.kernel_cmdline is defined
notify: update grub