Added the repository and version as variables

Make the role fully idempotent by pinning the version and also use a variable
for setting the repository.

roles/archwiki/defaults/main.yml

@@ -2,6 +2,9 @@
 archwiki_dir: '/srv/http/archwiki'
 archwiki_domain: 'wiki.archlinux.org'
 archwiki_user: 'archwiki'
+archwiki_repository: 'https://git.archlinux.org/vhosts/wiki.archlinux.org.git'
+archwiki_version: 157cc33b0b4459e02b0a573277e092b79bc849b1
+
 archwiki_socket: '/run/php-fpm/archwiki.socket'
 
 archwiki_db: 'archwiki'

roles/archwiki/tasks/main.yml

@@ -24,7 +24,7 @@
   file: path=/var/log/nginx/{{ archwiki_domain }} state=directory owner=root group=root mode=0755
 
 - name: clone archwiki repo
-  git: repo=https://git.archlinux.org/vhosts/{{ archwiki_domain }}.git dest="{{ archwiki_dir }}/public"
+  git: repo={{ archwiki_repository }} dest="{{ archwiki_dir }}/public" version={{ archwiki_version }}
   become: true
   become_user: "{{ archwiki_user }}"
   register: release