hack.sh

here=$(pwd)
cd $GOPATH/src/github.com/tektoncd/triggers
ko apply -f config/controller.yaml
ko apply -f config/webhook.yaml
cd $here
kubectl apply -f trigger.yaml
sleep 10
kubectl run curl --image=curlimages/curl -- /bin/sh -c "sleep 10000"
echo "This event will not generate a triggered pipelinerun"
kubectl exec -it curl -- curl http://el-eventlistener:8080 -H "X-Internal: match" -H "X-GitHub-Event: pull_request" --data '{"pull_request":{"head":{}}}' -vv
sleep 5
echo "Since this event matches the cel filter overlay, we will get an event generated by the internal trigger"
kubectl exec -it curl -- curl http://el-eventlistener:8080 -H "X-Internal: match" -H "X-GitHub-Event: pull_request" --data '{"pull_request":{"head":{"sha":"abc123987"}}}' -vv

trigger.yaml

apiVersion: triggers.tekton.dev/v1alpha1
kind: Trigger
metadata:
  name: trigger
spec:
  interceptors:
    - cel:
        filter: "header.match('X-GitHub-Event', 'pull_request')"
        overlays:
        - key: extensions.truncated_sha
          expression: "body.pull_request.head.sha.truncate(7)"
  triggers:
  - ref: internal-trigger
---
apiVersion: triggers.tekton.dev/v1alpha1
kind: Trigger
metadata:
  name: internal-trigger
  labels:
    tekton.dev/sink: hidden
spec:
  interceptors:
    - cel:
        filter: "header.match('X-Internal', 'match')"
        overlays:
  template:
    ref: pipeline-template
---
apiVersion: triggers.tekton.dev/v1alpha1
kind: TriggerTemplate
metadata:
  name: pipeline-template
spec:
  resourcetemplates:
  - apiVersion: tekton.dev/v1beta1
    kind: PipelineRun
    metadata:
      generateName: simple-pipeline-run-
    spec:
      pipelineSpec:
        tasks:
        - name: task1
          taskSpec:
            steps:
            - image: ubuntu
              name: print-hi
              script: |
                echo hi
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: tekton-trigger-sa
  namespace: tekton-pipelines
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: tektoncd-triggers-github-binding
  namespace: tekton-pipelines
subjects:
- kind: ServiceAccount
  name: tekton-trigger-sa
  namespace: tekton-pipelines
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: tekton-trigger
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: tekton-triggers-clusterbinding
subjects:
- kind: ServiceAccount
  name: tekton-trigger-sa
  namespace: tekton-pipelines
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: tekton-triggers-aggregate-view
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: tekton-trigger-aggregate-view
subjects:
- kind: ServiceAccount
  name: tekton-trigger-sa
  namespace: tekton-pipelines
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: tekton-aggregate-view
---
apiVersion: triggers.tekton.dev/v1alpha1
kind: EventListener
metadata:
  name: eventlistener
  namespace: tekton-pipelines
spec:
  serviceAccountName: tekton-trigger-sa
  serviceType: LoadBalancer
  namespaceSelector:
    matchNames:
    - tekton-pipelines