- name: discover grub-install command
  find:
    paths:
      - "{{ tmp_rootfs_mount }}/usr/sbin"
    pattern: "grub*-install"
  register: grub_install_found

- name: discover grub-mkconfig command
  find:
    paths:
      - "{{ tmp_rootfs_mount }}/usr/sbin"
    pattern: "grub*-mkconfig"
  register: grub_config_found

- name: find grub config file
  find:
    paths:
      - "{{ tmp_rootfs_mount }}/boot"
    pattern: "grub*.cfg"
    recurse: yes
  register: grub_file_found

- name: test if all needed grub files were found
  assert:
    that:
      - "{{ grub_install_found.matched > 0 }}"
      - "{{ grub_config_found.matched > 0 }}"
      - "{{ grub_file_found.matched > 0 }}"

- name: set paths to grub commands
  set_fact:
    grub_install_cmd: "{{ grub_install_found.files[0].path | replace(tmp_rootfs_mount,'') }}"
    grub_config_cmd: "{{ grub_config_found.files[0].path | replace(tmp_rootfs_mount,'') }}"
    grub_config_file: "{{ grub_file_found.files[0].path | replace(tmp_rootfs_mount,'') }}"

- name: make dirs for chroot
  become: yes
  file:
    state: directory
    path: "{{ tmp_rootfs_mount }}/{{ item }}"
  with_items:
    - dev
    - sys
    - proc

- name: mount dirs for chroot
  become: yes
  command: mount -o bind /{{ item }} {{ tmp_rootfs_mount }}/{{ item }}
  with_items:
    - dev
    - sys
    - proc

- block:
  - name: get grub version string
    become: yes
    command: chroot {{ tmp_rootfs_mount }} /bin/sh -c '{{ grub_install_cmd }} --version'
    register: grub_version_string
  - name: install grub to disk
    become: yes
    command: chroot {{ tmp_rootfs_mount }} /bin/sh -c '{{ grub_install_cmd }} /dev/{{ ansible_devices | first }}'
  - name: preload lvm modules for grub2
    become: yes
    lineinfile:
      dest: "{{ tmp_rootfs_mount }}/etc/default/grub"
      state: present
      line: GRUB_PRELOAD_MODULES=lvm
    when: "{{ grub_version_string.stdout.split() | last | first == '2' }}"
  - name: create grub config
    become: yes
    command: chroot {{ tmp_rootfs_mount }} /bin/sh -c '{{ grub_config_cmd }} -o {{ grub_config_file }}'
  always:
  - name: unmount dirs for chroot
    become: yes
    command: umount {{ tmp_rootfs_mount }}/{{ item }}
    with_items:
      - dev
      - sys
      - proc