Move mautrix telegram and whatsapp into separate roles

The goal is to move each bridge into its own separate role.
This commit starts off the work on this with 2 bridges:
- mautrix-telegram
- mautrix-whatsapp

Each bridge's role (including these 2) is meant to:

- depend only on the matrix-base role

- integrate nicely with the matrix-synapse role (if available)

- integrate nicely with the matrix-nginx-proxy role (if available and if
required). mautrix-telegram bridge benefits from integrating with
it.

- not break if matrix-synapse or matrix-nginx-proxy are not used at all

This has been provoked by #174 (Github Issue).

roles/matrix-bridge-mautrix-whatsapp/templates/config.yaml.j2

@@ -0,0 +1,87 @@
+#jinja2: lstrip_blocks: "True"
+# Homeserver details.
+homeserver:
+  # The address that this appservice can use to connect to the homeserver.
+  address: {{ matrix_mautrix_whatsapp_homeserver_address }}
+  # The domain of the homeserver (for MXIDs, etc).
+  domain: {{ matrix_mautrix_whatsapp_homeserver_domain }}
+
+# Application service host/registration related details.
+# Changing these values requires regeneration of the registration.
+appservice:
+  # The address that the homeserver can use to connect to this appservice.
+  address: {{ matrix_mautrix_whatsapp_appservice_address }}
+
+  # The hostname and port where this appservice should listen.
+  hostname: 0.0.0.0
+  port: 8080
+
+  # Database config.
+  database:
+    # The database type. Only "sqlite3" is supported.
+    type: sqlite3
+    # The database URI. Usually file name. https://github.com/mattn/go-sqlite3#connection-string
+    uri: mautrix-whatsapp.db
+  # Path to the Matrix room state store.
+  state_store_path: ./mx-state.json
+
+  # The unique ID of this appservice.
+  id: whatsapp
+  # Appservice bot details.
+  bot:
+    # Username of the appservice bot.
+    username: whatsappbot
+    # Display name and avatar for bot. Set to "remove" to remove display name/avatar, leave empty
+    # to leave display name/avatar as-is.
+    displayname: WhatsApp bridge bot
+    avatar: remove
+
+  # Authentication tokens for AS <-> HS communication. Autogenerated; do not modify.
+  as_token: "This value is generated when generating the registration"
+  hs_token: "This value is generated when generating the registration"
+
+# Bridge config. Currently unused.
+bridge:
+  # {% raw %}
+  # protecting the go templates inside the raw section.
+  # Localpart template of MXIDs for WhatsApp users.
+  # {{.}} is replaced with the phone number of the WhatsApp user.
+  username_template: whatsapp_{{.}}
+  # Displayname template for WhatsApp users.
+  # {{.Notify}} - nickname set by the WhatsApp user
+  # {{.Jid}}    - phone number (international format)
+  # The following variables are also available, but will cause problems on multi-user instances:
+  # {{.Name}}   - display name from contact list
+  # {{.Short}}  - short display name from contact list
+  displayname_template: "{{if .Notify}}{{.Notify}}{{else}}{{.Jid}}{{end}} (WA)"
+  # {% endraw %}
+
+  # The prefix for commands. Only required in non-management rooms.
+  command_prefix: "!wa"
+
+  # Permissions for using the bridge.
+  # Permitted values:
+  #     user - Access to use the bridge to chat with a WhatsApp account.
+  #    admin - User level and some additional administration tools
+  # Permitted keys:
+  #        * - All Matrix users
+  #   domain - All users on that homeserver
+  #     mxid - Specific user
+  permissions:
+    '{{ matrix_mautrix_whatsapp_homeserver_domain }}': user
+
+# Logging config.
+logging:
+  # The directory for log files. Will be created if not found.
+  directory: ./logs
+  # Available variables: .Date for the file date and .Index for different log files on the same day.
+  file_name_format: {% raw %}"{{.Date}}-{{.Index}}.log"{% endraw %}
+  # Date format for file names in the Go time format: https://golang.org/pkg/time/#pkg-constants
+  file_date_format: 2006-01-02
+  # Log file permissions.
+  file_mode: 0600
+  # Timestamp format for log entries in the Go time format.
+  timestamp_format: Jan _2, 2006 15:04:05
+  # Minimum severity for log messages.
+  # Options: debug, info, warn, error, fatal
+  print_level: debug

roles/matrix-bridge-mautrix-whatsapp/templates/systemd/matrix-mautrix-whatsapp.service.j2

@@ -0,0 +1,36 @@
+#jinja2: lstrip_blocks: "True"
+[Unit]
+Description=Matrix Mautrix Whatsapp server
+{% for service in matrix_mautrix_whatsapp_systemd_required_services_list %}
+Requires={{ service }}
+After={{ service }}
+{% endfor %}
+{% for service in matrix_mautrix_whatsapp_systemd_wanted_services_list %}
+Wants={{ service }}
+{% endfor %}
+
+[Service]
+Type=simple
+ExecStartPre=-/usr/bin/docker kill matrix-mautrix-whatsapp
+ExecStartPre=-/usr/bin/docker rm matrix-mautrix-whatsapp
+
+ExecStart=/usr/bin/docker run --rm --name matrix-mautrix-whatsapp \
+			--log-driver=none \
+			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
+			--cap-drop=ALL \
+			--network={{ matrix_docker_network }} \
+			-v {{ matrix_mautrix_whatsapp_base_path }}:/data:z \
+			--workdir=/data \
+			{% for arg in matrix_mautrix_whatsapp_container_extra_arguments %}
+			{{ arg }} \
+			{% endfor %}
+			{{ matrix_mautrix_whatsapp_docker_image }} \
+			/usr/bin/mautrix-whatsapp
+
+ExecStop=-/usr/bin/docker kill matrix-mautrix-whatsapp
+ExecStop=-/usr/bin/docker rm matrix-mautrix-whatsapp
+Restart=always
+RestartSec=30
+
+[Install]
+WantedBy=multi-user.target