# Specific to Raspberry Pi

- name: Install udev rule /etc/udev/rules.d/92-rtc-i2c.rules from template, to transfer hwclock to system clock at dev creation, if rtc_id is defined and rtc_id != "none" (root:root, 0644 by default)
  template:
    src: 92-rtc-i2c.rules
    dest: /etc/udev/rules.d/92-rtc-i2c.rules
    #owner: root
    #group: root
    #mode: 0644
  when: rtc_id is defined and rtc_id != "none"

# RTC requires a change to the device tree (and reboot)
- name: Enable i2c-rtc device (with "dtoverlay=i2c-rtc,{{ rtc_id }}=on" in /boot/config.txt, requires reboot!) if rtc_id is defined and rtc_id != "none" and is_raspbian
  lineinfile:
    path: /boot/config.txt
    line: "dtoverlay=i2c-rtc,{{ rtc_id }}=on"
    state: present
  when: rtc_id is defined and rtc_id != "none" and is_raspbian

- name: Enable i2c-rtc device (with "dtoverlay=i2c-rtc,{{ rtc_id }}=on" in /boot/firmware/config.txt, requires reboot!) if rtc_id is defined and rtc_id != "none" and is_ubuntu
  lineinfile:
    path: /boot/firmware/usercfg.txt
    line: "dtoverlay=i2c-rtc,{{ rtc_id }}=on"
    state: present
  when: rtc_id is defined and rtc_id != "none" and is_ubuntu    # CLARIF: Ubuntu runs increasingly well on RPi hardware, starting in 2020 especially

#- name: Enable bluetooth in /boot/firmware/syscfg.txt on Ubuntu (needs reboot)
#  lineinfile:
#    path: /boot/firmware/syscfg.txt
#    regexp: '^include*'
#    line: 'include btcfg.txt'
#  when: is_ubuntu


- name: '2021-07-27: SEE ALSO ~4 networking packages LATER installed by https://github.com/iiab/iiab/blob/master/roles/2-common/tasks/packages.yml'
  meta: noop

- name: '2021-07-27: SEE ALSO 4-5 networking packages LATER installed by https://github.com/iiab/iiab/blob/master/roles/2-common/tasks/network.yml'
  meta: noop

# 2021-07-27 explanation from @jvonau: The 3 BELOW (iw, rfkill, wireless-tools)
# are provided by RasPiOS.  Ubuntu|Debian on the other hand are hit or miss:
# desktops might have some/all 3 preinstalled, while servers tend not to have
# these present at all, but are needed to be installed if you want to take full
# advantage of WiFi on Ubuntu and friends -- but it's only enforced on RPi
# hardware where we know in advance of the likelihood of WiFi being present.

# 2022-03-15: This section is effectively now useless on RasPiOS (but apparently
# serves a purpose on Ubuntu on RPi, where it installs dphys-swapfile and
# fake-hwclock).  Still: @jvonau's above explanation of other OS's / other HW
# suggest this code should possibly move in future, to helps others too?

- name: 'Install packages: dphys-swapfile, fake-hwclock, iw, rfkill, wireless-tools'
  package:
    name:
      - dphys-swapfile    # 2021-03-15: For Ubuntu on RPi?  RasPiOS installs this regardless -- autogenerate and use a swap file
      - fake-hwclock      # 2021-03-15: For Ubuntu on RPi?  RasPiOS installs this regardless -- save/restore system clock on machines without working RTC hardware
      - iw                # 2021-07-27: RasPiOS installs this regardless -- configure Linux wireless devices -- hard dependence for ap0 creation, SEE https://github.com/iiab/iiab/blob/master/roles/network/templates/hostapd/iiab-clone-wifi.service.j2
      - rfkill            # 2021-07-27: RasPiOS installs this regardless -- enable & disable wireless devices
      - wireless-tools    # 2021-07-27: RasPiOS installs this regardless -- manipulate Linux Wireless Extensions
    state: present


- name: Increase swap file size (to CONF_SWAPSIZE={{ pi_swap_file_size }} in /etc/dphys-swapfile) as kalite pip download fails
  lineinfile:
    path: /etc/dphys-swapfile
    regexp: "^CONF_SWAPSIZE"
    line: "CONF_SWAPSIZE={{ pi_swap_file_size }}"

- name: Restart swap service "dphys-swapfile"
  #command: /etc/init.d/dphys-swapfile restart
  systemd:    # Had been...a rare/legacy service that was NOT systemd
    name: dphys-swapfile
    state: restarted