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README.md

Installation

$ git clone ...
$ cd matrix-appservice-gitter
$ npm install

Setup

  1. Create a github user to act as the relay bot itself in gitter chanels. Obtain the user's gitter API key by visiting https://developer.gitter.im/apps

  2. Create a new Matrix room to act as the administration control room. Note its internal room ID.

  3. Create a gitter-config.yaml file for global configuration. There is a sample one to begin with in config/gitter-config-sample.yaml you may wish to copy and edit as appropriate. This needs the following keys:

    gitter_api_key: "the API key obtained in step 1"
    
    matrix_homeserver: "http URL pointing at the homeserver"
    
    matrix_user_domain: "domain part of the homeserver's name. Used for
                        ghost username generation"
    
    username_template: "template for virtual users, e.g. gitter_${USER}"
    
    matrix_admin_room: "the ID of the room created in step 2"
  4. Pick/decide on a spare local TCP port number to run the application service on. This needs to be visible to the homeserver - take care to configure firewalls correctly if that is on another machine to the bridge. The port number will be noted as $PORT in the remaining instructions.

  5. Generate the appservice registration file (if the application service runs on the same server you can use localhost as $URL):

    $ node index.js --generate-registration -f gitter-registration.yaml  -u $URL:$PORT
  6. Start the actual application service. You can use forever

    $ forever start index.js --config gitter-config.yaml --port $PORT

    or node

    $ node index.js --config gitter-config.yaml --port $PORT
  7. Copy the newly-generated gitter-registration.yaml file to the homeserver. Add the registration file to your homeserver config (default homeserver.yaml):

    app_service_config_files:
      - ...
      - "/path/to/gitter-registration.yaml"

    Don't forget - it has to be a YAML list of strings, not just a single string.

    Restart your homeserver to have it reread the config file and establish a connection to the bridge.

  8. Invite the newly-created @gitterbot:DOMAIN user into the admin control room created at step 2.

The bridge should now be running.

Provisioning

The bridge is controlled by commands in the admin control room.

link [matrix room ID] [gitter room name]

Creates a new link between the given matrix room ID (example: !abcdef:example.org) and the gitter room name (example: gitterHQ/sandbox) and joins the associated gitter room. The relay user must be invited to the matrix room for this to become functional.

unlink [matrix room ID or gitter room name]

Disconnects the link associated with the given room and leaves the associated gitter room

Dynamic Portals

As well as the linked rooms created by administrator users on the console, it is also possible to enable "dynamic portals", a feature in which the bridge itself will lazily create linked rooms in response to alias lookup requests within a given namespace.

  1. Set the following extra configuration values in the main gitter-config.yaml file:

    enable_portals: true
    
    alias_template: "template for room aliases, e.g. gitter_${ROOM}"
  2. Ensure that the appservice registration file requests an alias regexp pattern that will match the alias template form, e.g.:

    ...
    namespaces:
     aliases:
       - exclusive: true
         regex: '#gitter_.*'

    If you've edited the registration file, don't forget to restart the homeserver to have the new values applied.

You should now be able to dynamically create new portal rooms by directly attempting to join room aliases matching this template. These rooms will behave similarly to administrator-provisioned link rooms, except that because the application service itself created the Matrix-side room, it retains full operator control of the room.

For top-level gitter rooms like organisations, repositories and user rooms, you can simply embed the name in the alias. For example, the top-level gitter chat room relating to my-org-here would be found at:

/join #gitter_my-org-here:localhost

To join a channel nested withn an organisation, repository or user account, you'll need to encode the / character as =2F. For example, the my-org-here/chat room would be found at:

/join #gitter_my-org-here=2Fchat:localhost

Alternatively, if you wish to be able to create these portals only from the admin console without letting all your users dynamically create their own, you can leave the aliases list empty in the registration file, so that the homeserver won't ask the application service to dynamically create them. Instead, you can provision them directly by using the admin control room.

mkportal [gitter room name]

Will create a new portal room for the given gitter room name and print its alias. Once created, these rooms act the same as other dynamic portals.