---
- hosts: all
  become: yes
  vars:
    hostname: mydomain
  pre_tasks:
    # NOTE: you probably don't want to run these pre_tasks on a real box. Just
    # 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).
    # So make sure you either have DNS records for hg.mydomain or it's in
    # /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: hgweb role depends on Lighttpd and uWSGI being installed. It's
    # recommended to install them in separate lighttpd and uwsgi roles, not in
    # pre_tasks like in this example playbook.
    - name: Install Lighttpd
      apt:
        update_cache: yes
        cache_valid_time: 3600
        package: lighttpd
        state: present
    - name: Install uWSGI
      apt:
        package:
          - uwsgi
          - uwsgi-plugin-python3
        state: present
  roles:
#    - role: lighttpd
#      tags: [lighttpd]
#    - role: uwsgi
#      tags: [uwsgi]
    - role: hgweb
      tags: [hgweb]
  handlers:
    # NOTE: hgweb role notifies two handlers:
    # - restart uwsgi
    # - restart lighttpd
    # Naturally, the handlers are not defined in the role itself, so this
    # example playbook includes them here.
    - name: restart uwsgi
      service:
        name: uwsgi
        state: restarted
    - name: restart lighttpd
      service:
        name: lighttpd
        state: restarted
...
# NOTE: how to test that it works correctly (also see the note about DNS):
# curl -I http://hg.mydomain/
# curl -I http://hg.mydomain/static/mercurial.js
#   then check /var/log/uwsgi/app/50-hgweb.log for problems
#   make sure it doesn't see requests /static/ (Lighttpd should handle them)