- name: Record (initial) disk space used
  shell: df -B1 --output=used / | tail -1
  register: df1


- name: Yarn | Download apt key to /usr/share/keyrings/yarn.gpg
  shell: curl https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor > /usr/share/keyrings/yarn.gpg

- name: Yarn | Add signed Yarn PPA to /etc/apt/sources.list.d/dl_yarnpkg_com_debian.list
  apt_repository:
    repo: "deb [signed-by=/usr/share/keyrings/yarn.gpg] https://dl.yarnpkg.com/debian/ stable main"
    #filename: yarn    # If legacy filename yarn.list is preferred

# 2023-04-01 above avoids DEPRECATED apt-key command & associated problems:
# https://github.com/iiab/iiab/wiki/IIAB-Platforms#etcapttrustedgpg-legacy-keyring-warnings

# - name: "Yarn | GPG"
#   apt_key:
#     url: https://dl.yarnpkg.com/debian/pubkey.gpg
#     state: present

# - name: "Yarn | Ensure Debian sources list file exists"
#   file:
#     path: /etc/apt/sources.list.d/yarn.list
#     owner: root
#     mode: '0644'
#     state: touch

# - name: "Yarn | Ensure Debian package is in sources list"
#   lineinfile:
#     dest: /etc/apt/sources.list.d/yarn.list
#     regexp: 'deb https://dl.yarnpkg.com/debian/ stable main'
#     line: 'deb https://dl.yarnpkg.com/debian/ stable main'
#     state: present

- name: Yarn | Update APT cache
  apt:
    update_cache: yes

- name: Yarn | Install
  package:
    name: yarn
    #state: latest    # No need to mention it, with apt


# RECORD Yarn AS INSTALLED

- name: Record (final) disk space used
  shell: df -B1 --output=used / | tail -1
  register: df2

- name: Add 'yarn_disk_usage = {{ df2.stdout|int - df1.stdout|int }}' to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
    section: yarn
    option: yarn_disk_usage
    value: "{{ df2.stdout|int - df1.stdout|int }}"

- name: "Set 'yarn_installed: True'"
  set_fact:
    yarn_installed: True

- name: "Add 'yarn_installed: True' to {{ iiab_state_file }}"
  lineinfile:
    path: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
    regexp: '^yarn_installed'
    line: 'yarn_installed: True'