moved raspberry specific settings to raspberrypi role

---

- name: Test for raspberry pi /proc/cpuinfo

  command: grep -E "Raspberry Pi|BCM2708|BCM2709|BCM2835|BCM2836" /proc/cpuinfo

  register: grep_cpuinfo_raspberrypi

  failed_when: false

  changed_when: false

- name: Test for raspberry pi /proc/device-tree/model

  command: grep -E "Raspberry Pi" /proc/device-tree/model

  register: grep_device_tree_model_raspberrypi

  failed_when: false

  changed_when: false

- name: Set raspberry_pi fact to true

  set_fact:

    raspberry_pi: true

  when:

    grep_cpuinfo_raspberrypi.rc == 0 or grep_device_tree_model_raspberrypi.rc == 0

- name: Set detected_distribution to Raspbian

  set_fact:

    detected_distribution: Raspbian

  when:

   - raspberry_pi|default(false)

   - ansible_facts.lsb.id|default("") == "Raspbian" or ansible_facts.lsb.description|default("") is match("[Rr]aspbian.*")

- name: Set detected_distribution to Raspbian (ARM64 on Debian Buster)

  set_fact:

    detected_distribution: Raspbian

  when:

    - ansible_facts.architecture is search("aarch64")

    - raspberry_pi|default(false)

    - ansible_facts.lsb.description|default("") is match("Debian.*buster")

- name: Set detected_distribution_major_version

  set_fact:

    detected_distribution_major_version: "{{ ansible_facts.lsb.major_release }}"

  when:

    - detected_distribution | default("") == "Raspbian"

- name: execute OS related tasks on the Raspberry Pi

  include_tasks: "{{ item }}"

  with_first_found:

    - "prereq/{{ detected_distribution }}-{{ detected_distribution_major_version }}.yml"

    - "prereq/{{ detected_distribution }}.yml"

    - "prereq/{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml"

    - "prereq/{{ ansible_distribution }}.yml"

    - "prereq/default.yml"

---

- name: Test for Raspbian

  set_fact:

    raspbian: '{% if

      ( ansible_facts.architecture is search("arm") and

        ansible_facts.lsb.description is match("[Rr]aspbian.*[Bb]uster") ) or

      ( ansible_facts.architecture is search("aarch64") and

        ansible_facts.lsb.description is match("Debian.*buster") or

        ansible_facts.lsb.description is match("[Rr]aspbian.*[Bb]uster") ) %}true{% else %}false{% endif %}'

- name: Activating cgroup support

  lineinfile:

    path: /boot/cmdline.txt

    line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'

    backrefs: true

  notify: reboot

  when:

    - raspbian is true

- name: Flush iptables before changing to iptables-legacy

  iptables:

    flush: true

  when: raspbian

  changed_when: false   # iptables flush always returns changed

- name: Changing to iptables-legacy

    path: /usr/sbin/iptables-legacy

    name: iptables

  register: ip4_legacy

  when: raspbian

- name: Changing to ip6tables-legacy

  alternatives:

    path: /usr/sbin/ip6tables-legacy

    name: ip6tables

  register: ip6_legacy

  when: raspbian

---