let user choose grub_bootloader_target

tasks/main.yml

@@ -11,7 +11,11 @@
     dest: "{{ root_target_directory }}/etc/default/grub"
 
 - name: grub-install
-  command: chroot {{ root_target_directory }} grub-install {{ item }}
+  command:
+    chroot {{ root_target_directory }}
+    grub-install
+    {{ lookup('template','grub-install.args.j2') }} 
+    {{ item }}
   with_items: "{{ boot_devices }}"
 
 - name: update-grub

templates/grub-install.args.j2

@@ -0,0 +1,12 @@
+{% if grub_bootloader_target is defined %}
+--target={{ grub_bootloader_target }}
+{% endif %}
+{% if efi_directory is defined %}
+--efi-directory={{efi_directory}}
+{% endif %}
+{% if grub_bootloader_id is defined %}
+--bootloader-id={{grub_bootloader_id}}
+{% endif %}
+{% if grub_bootloader_recheck is defined and grub_bootloader_recheck %}
+--recheck
+{% endif %}