mariobot

Mario bot

Mario is an experimental bot that automates tasks in the plumbing repository.

It's intended to be used as a Tekton Webhook endpoint.

Usage

Mario responds to comments on issues received via GitHub hook events.

Triggering builds

Currently the only recognised command is build:

Adding a comment like this to an issue:

/mario build tekton/images/tkn tkn:mario

This will respond with a JSON body something like this:

{
  "buildUUID": "81799043-9591-4b1d-bb00-ca76e1ced916",
  "gitRepository": "github.com/tektoncd/plumbing",
  "gitRevision": "pull/20/head",
  "contextPath": "tekton/images/tkn",
  "targetImage": "gcr.io/tekton-releases/dogfooding/tkn:mario",
  "pullRequestID": "20"
}

These fields can be picked up in a template binding:

apiVersion: tekton.dev/v1alpha1
kind: TriggerBinding
metadata:
  name: mario-trigger-binding
spec:
  params:
  - name: buildUUID
    value: $(body.buildUUID)
  - name: gitRepository
    value: $(body.gitRepository)
  - name: gitRevision
    value: $(body.gitRevision)
  - name: contextPath
    value: $(body.contextPath)
  - name: targetImage
    value: $(body.targetImage)
  - name: pullRequestID
    value: $(body.pullRequestID)

Triggering from an Event Listener

As this is a Webhook interceptor it needs to be configured in the list of interceptors for a trigger:

It does its own GitHub secret validation.

apiVersion: tekton.dev/v1alpha1
kind: EventListener
metadata:
  name: mario-image-builder
spec:
  serviceAccountName: mario-listener
  triggers:
    - name: trigger
      interceptors:
        - webhook:
            objectRef:
              kind: Service
              name: mario
              apiVersion: v1
              namespace: mario
      bindings:
        - ref: mario-trigger-binding
      template:
        ref: mario-trigger-template

Configuring the GitHub secret

The Mario Bot requires a GitHub Hook Secret in the environment variable token.

The bot uses secrets in the dogfooding cluster.