Redmine Merge Request Links

Display links to associated GitLab merge requests and GitHub pull requests on Redmine's issue page.

Intercepts webhooks and parses merge request descriptions for mentioned issue ids.

Requirements

• Redmine 3 (tested with 3.4.6)

Installation

Copy plugin directoy to {RAILS_APP}/plugins on your Redmine path.

This plugin requires an additional view hook which can be added by applying a patch to your Redmine instance. From your Redmine path run:

$ git apply plugins/redmine_merge_request_links/patches/view_hook_issues_show_after_details.patch

One of the following environment variables need to be set:

• REDMINE_MERGE_REQUEST_LINKS_GITLAB_WEBHOOK_TOKEN
• REDMINE_MERGE_REQUEST_LINKS_GITHUB_WEBHOOK_TOKEN

They must contain secrets which have to be configured in GitLab/GitHub to authenticate webhooks.

Usage

Create a webhook in GitLab or GitHub as described here:

GitLab

• Go to either the webhook page of a project (Settings > Integration) or the system hook page (Admin area > System Hooks).

• Enter the URL of your Redmine instance http://redmine.example.com/merge_requests/event

• Enter the secret token you defined in environment variable REDMINE_MERGE_REQUEST_LINKS_GITLAB_WEBHOOK_TOKEN

• Check the "Merge request events" trigger.

• Click "Add webhook".

GitHub

• Go to the webhook page of a project or organization.

• Enter the URL of your Redmine instance https://redmine.example.com/merge_requests/event.

• Select application/json as content type.

• Enter the secret token you defined in environment variable REDMINE_MERGE_REQUEST_LINKS_GITHUB_WEBHOOK_TOKEN.

• Choose "Let me select individual events".

• Check the "Pull requests" event.

• Click "Add webhook".

Redmine server

• Export the environment variable(s) in your bash or webserver config. Examples with Phusion Passenger webserver can be found here: https://www.phusionpassenger.com/library/indepth/environment_variables.html

• Run plugin migrations from your redmine root directory rake redmine:plugins:migrate RAILS_ENV=production

• Restart your webserver

Known Issues

• Gitlab only passes the author id as part of the merge request webhook not a display name. It does include the username of the user whose action triggered the webhook, though. To prevent having to fetch the author name in a separate REST API call, this username is used as author name since the user triggering a merge request's first webhook is usually the author. For merge request that were created before the plugin was installed, this causes the first user to edit the merge request to be recorded as the author.

Development

After checking out the repository, run

$ bin/build

to build the Docker container used to run the test suite.

Then run

$ bin/test

to run the test suite inside a Docker container.

License

The gem is available as open source under the terms of the MIT License.