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Trigger webhooks with events.

Project description


This is a module that provides events for:

  • mattermost
  • dockerhub

Events can trigger webhooks on the previously mentioned web services.


Of course, events could do a lot more. If you have an idea, please just create an issue and describe it.

Additionally events can be configured with relams. Realms provide a context to an event and restrict the event action by caller origin.

Right now, there always needs to be a valid realm. In the future, this can be optimized so giving no realm will always execute the event action.


I use this module in the github_repo_watcher.

To be brief, the github_repo_watcher checks a github repository for new commits to master and for new tags.

Whenever a new commit or tag is found, 3 things happen:

  • The commit and tag are stored in a database.
  • A mattermost webhook is triggered (mattermost event).
    • Only for tags.
  • A dockercloud webhook is triggered (dockercloud event).
    • For both commits and tags.

You can see, the github_repo_watcher is configured with 2 events:

  • mattermost
  • dockerhub

Additionally, the application supports 2 realms to restrict an event's action:

  • GITHUB_COMMIT_REALM = "github_commits"
  • GITHUB_TAG_REALM = "github_tags"

Here, the realms feature is used to restrict the mattermost event to only trigger the webhook for new tags - like mentioned before.

Imagine a mattermost event configuration like this:

    mattermost_trigger = MattermostWebHook(


At this point, I leave out the configuration of other events. Just imagine, the github_repo_watcher is configured with a ton of events.

Now, imagine a new tag was found.

Obviously, the function which loops over all the events is called with the realm GITHUB_TAG_REALM (new github tag was found).

So, every event (mattermost, "a ton of events", ...) is essentially triggered like this:

    event.trigger(data="Found new tag for repo <some_github_repo>.", realm=GITHUB_TAG_REALM)

Since the mattermost event is configured to be triggered in the GITHUB_TAG_REALM only, it will trigger the mattermost webhook.

And it won't be triggered if the configuration should look like this (using GITHUB_COMMIT_REALM):

    mattermost_trigger = MattermostWebHook(

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