---
- hosts: all
  become: yes
  vars:
    hostname: mydomain
  pre_tasks:
    # NOTE: you probably don't want to run these 3 commands on a real box.
    # Also, to be able to access hgweb from inside the box, you need to use
    # domain name (i.e. http://127.0.0.1/ won't work). Make sure you have DNS
    # records for hg.mydomain or add it to /etc/hosts.
    - name: Set hostname
      hostname: name={{ hostname }}
    - name: Update /etc/hosts
      lineinfile: dest=/etc/hosts line="127.0.0.1 {{ hostname }} hg.{{ hostname }}"
    # NOTE: this role depends on nginx and supervisor packages being installed,
    # and also it uses two handlers:
    # - reload supervisor
    # - restart nginx
    # If you don't have your own nginx and supervisor roles, just reload or
    # restart both services manually after running this playbook.
    - name: Install Nginx
      apt: package=nginx-full state=installed update_cache=yes cache_valid_time=3600
    - name: Install Supervisor
      apt: package=supervisor state=installed
  roles:
#    - role: nginx
#      tags: [nginx]
#    - role: supervisor
#      tags: [supervisor]
    - role: hgweb
      tags: [hgweb]
...