added support for AUR helper on Arcj

roles/base/tasks/software/aur_helper.yml

@@ -0,0 +1,31 @@
+---
+- name: "[Arch] Install base-devel & git"
+  pacman:
+    name:
+      - base-devel
+      - git
+    state: present
+  when: ansible_facts['os_family'] == "Archlinux"
+
+- name: "[Arch] Create AUR build user"
+  user:
+    name: "{{ aur_build_user }}"
+    groups: ['wheel']
+    create_home: yes
+  when: ansible_facts['os_family'] == "Archlinux"
+
+- name: "[Arch] Allow AUR builder to use pacman without password"
+  lineinfile:
+    path: "/etc/sudoers.d/90-aur-builder"
+    line: "{{ aur_build_user }} ALL=(ALL) NOPASSWD: /usr/bin/pacman"
+    create: yes
+    validate: "visudo -cf %s"
+  when: ansible_facts['os_family'] == "Archlinux"
+
+- name: "[Arch] Install AUR helper"
+  community.general.aur:
+    name: "{{ aur_helper }}"
+    state: present
+    use: makepkg
+  become_user: "{{ aur_build_user }}"
+  when: ansible_facts['os_family'] == "Archlinux"