---
- hosts: all
  become: yes
  vars:
    hostname: mydomain
  pre_tasks:
    # NOTE: you probably don't want to run these commands on a real box. But
    # bear in mind that to be able to access hgweb from inside the box, you
    # need to use the virtual host 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
    # This role doesn't have the handlers, so this playbook restarts the
    # services in post_tasks instead.
    - name: Install Nginx
      apt:
        update_cache: yes
        cache_valid_time: 3600
        package: nginx-full
        state: installed
    - name: Disable default Nginx site
      file:
        path: /etc/nginx/sites-enabled/default
        state: absent
    - name: Install Supervisor
      apt:
        package: supervisor
        state: installed
  roles:
#    - role: nginx
#      tags: [nginx]
#    - role: supervisor
#      tags: [supervisor]
    - role: hgweb
      tags: [hgweb]
  post_tasks:
    - name: Restart Nginx
      service:
        name: nginx
        state: restarted
    - name: Restart Supervisor
      service:
        name: supervisor
        state: restarted
        sleep: 1
...