Move install-prefs to Ansible

I never ended up moving to this installation system, did I?

config/automatrop/roles/system/files/us_qwert_alt_numpad.patch

@@ -0,0 +1,10 @@
+***************
+*** 6,11 ****
+--- 6,12 ----
+  {
+      include "us(basic)"
+      include "level3(ralt_switch)"
++     include "keypad(oss)"
+
+      name[Group1]= "US keyboard with french symbols - AltGr combination";
+

config/automatrop/roles/system/tasks/main.yml

@@ -1,24 +1,9 @@
 # TODO For other distributions
 
-- name: Set variables
-  set_fact:
-    arch_based: "{{ ansible_distribution == 'Archlinux' }}"
-    # arch: "{{ ansible_lsb.id == 'Arch' }}"
-    # manjaro: "{{ ansible_lsb.id == 'Manjaro' or ansible_lsb.id == 'Manjaro-ARM' }}"
-    # termux: "{{ ansible_distribution == 'OtherLinux' and ansible_python.executable == '/data/data/com.termux/files/usr/bin/python' }}"
-    # debian_based: "{{ ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu' }}"
-    # debian: "{{ ansible_distribution == 'Debian' }}"
-    # ubuntu: "{{ ansible_distribution == 'Ubuntu' }}"
+# Package are installed with --asdeps because they are needed
 
 # Etckeeper
 
-- name: Install etckeeper (Arch based)
-  pacman:
-    name: etckeeper
-    state: present
-  become: yes
-  when: arch_based
-
 - name: Check if etckeeper is initialized
   stat:
     path: /etc/.git
@@ -44,58 +29,6 @@
       value: "etckeeper@{{ inventory_hostname }}"
   become: yes
 
-# Arch configuration
-
-- name: Install ccache
-  pacman:
-    name: ccache
-    state: present
-  become: yes
-  when: arch_based
-
-- name: Enable makepkg ccache
-  replace:
-    path: /etc/makepkg.conf
-    regexp: '^BUILDENV=(.+)!ccache(.+)$'
-    replace: 'BUILDENV=\1ccache\2'
-  become: yes
-  when: arch_based
-
-- name: Set makepkg MAKEFLAGS
-  replace:
-    path: /etc/makepkg.conf
-    regexp: '^#? *MAKEFLAGS=(.+)-j[0-9]+(.+)$'
-    replace: "MAKEFLAGS=\\1-j{{ j }}\\2"
-  become: yes
-  vars:
-    j: "{{ [ansible_processor_nproc - 1, 1] | max | int }}"
-  when: arch_based
-
-- name: Enable makepkg color
-  replace:
-    path: /etc/makepkg.conf
-    regexp: '^BUILDENV=(.+)!color(.+)$'
-    replace: 'BUILDENV=\1color\2'
-  become: yes
-  when: arch_based
-
-- name: Enable pacman colors
-  lineinfile:
-    path: /etc/pacman.conf
-    regexp: "^#?Color"
-    line: "Color"
-  become: yes
-  when: arch_based
-
-- name: Enable pacman pacman
-  lineinfile:
-    path: /etc/pacman.conf
-    regexp: "^#?ILoveCandy"
-    line: "ILoveCandy"
-    insertafter: "^#?Color"
-  become: yes
-  when: arch_based
-
 # Manjaro configuration
 
 - name: Remove Manjaro's pamac
@@ -131,6 +64,15 @@
   notify: etc changed
   loop: "{{ xorg_common_config_dirs }}"
 
+- name: Use Alt keys for numpad
+  patch:
+    src: us_qwert_alt_numpad.patch
+    dest: /usr/share/X11/xkb/symbols/us_qwerty-fr
+  become: yes
+  when: display_server == 'x11'
+# This is not very nice but it's updated so infrequently that it's not worth
+# the trouble
+
 - name: Check if there is Intel backlight
   stat:
     path: /sys/class/backlight/intel_backlight
@@ -144,6 +86,7 @@
     state: present
   become: yes
   when: display_server == 'x11' and intel_backlight.stat.exists and arch_based
+  # TODO With software role? Would permit other distributions
 
 - name: Configure Xorg Intel backlight
   copy:
@@ -196,13 +139,6 @@
 
 # TLP configuration
 
-- name: Install TLP (Arch based)
-  pacman:
-    name: tlp
-    state: present
-  when: arch_based
-  become: yes
-
 - name: Start/enable TLP
   systemd:
     name: tlp
@@ -213,13 +149,6 @@
 
 # Network configuration
 
-- name: Install dhcpcd (Arch based)
-  pacman:
-    name: dhcpcd
-    state: present
-  when: arch_based
-  become: yes
-
 - name: Start/enable dhcpcd
   systemd:
     name: dhcpcd
@@ -228,15 +157,6 @@
   become: yes
   notify: etc changed
 
-- name: Install wpa_supplicant (Arch based)
-  pacman:
-    name: wpa_supplicant
-    state: present
-  when: arch_based
-  become: yes
-  notify:
-    - wifi setup changed
-
 - name: Configure wpa_supplicant
   template:
     src: wpa_supplicant.conf.j2
@@ -309,13 +229,6 @@
   notify: etc changed
   when: arch_based
 
-- name: Install chrony
-  pacman:
-    name: chrony
-    state: present
-  when: arch_based
-  become: yes
-
 - name: Configure chrony
   copy:
     src: chrony.conf