trac-mattermost is a Trac plugin publishing Trac events to Mattermost using webhooks.

To enable and configure trac-mattermost, you need to create an "Incoming Webhook" in Mattermost (Account Settings, Integrations, Incoming Webhooks), then you need to add the following to your Trac configuration file:

[components]
trac_mattermost.ticket_notifications.* = enabled
trac_mattermost.wiki_notifications.* = enabled

[mattermost]
username = Trac
webhook_url = https://mattermost.example.com/hooks/q9w8jq9wdw89sd7agf7sq7qweh
icon_url = https://s3.amazonaws.com/truveris-mattermost-icons/trac.png

Build an .egg file and drop it in the plugins directory of your Trac installation:

python setup.py bdist_egg