Plugin Redmine Mattermost Link: https://github.com/alphanodes/redmine_messenger/tree/main?tab=readme-ov-file git clone https://github.com/alphanodes/redmine_messenger.git Messenger plugin for Redmine This plugin posts updates to issues in your Redmine installation to  Slack ,  Rocket.Chat ,  Discord  or  Mattermost  channel. Features Post information to messenger channel post issue updates post private issue updates display watchers convert username to mentions post wiki updates post db entry (if redmine_db is installed) updates post password (if redmine_passwords is installed) updates post contact (if redmine_contacts is installed) updates Post information directly to users to be notified (users names should be the same in Redmine and chat). Tested with Rocket.Chat overwrite messenger settings at project level parent project support (inherit messenger settings from parent project) multiple channel support (define one or more channels to deliver note) Screenshot Rocket.Chat output: Redmine configuration: Convert names to mentions:  Automatically converts Redmine mentions into Slack mentions so a user is notified through Slack when mentioned in a Redmine note. Depends on Redmine Mentions plugin. Display watchers:  Issue watchers are included in notifications. Post issue updates:  All newly created notes on an issue generate a notification (does not include private issues). Description in new issue:  Include the text description of a new issue in the notification. Description in update issue:  Include the text encompassed in a note upon updating the issue in the notification. Post updates for private issue:  Same as  Post issue updates  but for private issues. Post private notes:  Same as  Description in update issue  but for private issues. Post wiki updates:  Generates a notification when a projects Wiki is updated. Prepare your messenger service Slack Go to Slack documentation  Incoming Webhooks  for more information to set up Incoming WebHook Mattermost Go to Mattermost documentation  Incoming Webhooks  for more information to set up Incoming WebHook Discord Go to Discord documentation  Intro to Webhooks  for more information to set up Incoming WebHook You have to add /slack after your webhook url. Rocket.Chat Go to Rocket.Chat documentation  Incoming WebHook Scripting  for more information to set up Incoming WebHook Requirements Redmine version >= 5.0 Ruby version >= 2.7.0 Older versions If you want to use it with Redmine 3.x, use git tag 1.0.5 If you want to use it with Redmine 4.0, use git tag 1.0.7 If you want to use it with Redmine 4.1, use git tag 1.0.13 If you want to use it with Redmine 4.2, use git tag 1.0.14 Installation Install  redmine_messenger  plugin for  Redmine cd $REDMINE_ROOT git clone https://github.com/AlphaNodes/redmine_messenger.git plugins/redmine_messenger bundle config set --local without 'development test' bundle install bundle exec rake redmine:plugins:migrate RAILS_ENV=production Make sure that the directory is named  redmine_messenger  (you cannot use another name for it)! Restart Redmine (application server) and you should see the plugin show up in the Plugins page. Under the configuration options, set the Messenger API URL to the URL for an Incoming WebHook integration in your Messenger account and also set the Messenger Channel to the channel's handle (be careful, this is not the channel's display name visible to users, you can find each channel's handle by navigating inside the channel and clicking the down-arrow and selecting view info). Uninstall Uninstall  redmine_messenger cd $REDMINE_ROOT bundle exec rake redmine:plugins:migrate NAME=redmine_messenger VERSION=0 RAILS_ENV=production rm -rf plugins/redmine_messenger Restart Redmine (application server) License redmine_messenger  plugin is developed under the  MIT License . Redmine Copyright The redmine_messenger is a plugin extension for Redmine Project Management Software, whose Copyright follows. Copyright (C) 2006- Jean-Philippe Lang Redmine is a flexible project management web application written using Ruby on Rails framework. More details can be found in the doc directory or on the official website  http://www.redmine.org This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Credits The source code is forked from redmine_rocketchat redmine_mattermost redmine-slack Special thanks to the original author and contributors for making this awesome hook for Redmine. This fork is just refactored to use Messenger-namespaced configuration options in order to use all hooks for Rocket.Chat, Mattermost AND Slack in a Redmine installation.