Replace gitlab-eventlistener with a working example

I moved this to a separate folder so that it was easy to add the sample
payload as well as instructions for trying it out locally.

Signed-off-by: Dibyo Mukherjee <[email protected]>

docs/eventlisteners.md

@@ -212,10 +212,7 @@ accept to the `eventTypes` field.
 The body/header of the incoming request will be preserved in this interceptor's
 response.
 
-<!-- FILE: examples/eventlisteners/gitlab-eventlistener-interceptor.yaml -->
-
-```YAML
----
+```yaml
 apiVersion: tekton.dev/v1alpha1
 kind: EventListener
 metadata:

examples/gitlab/README.md

@@ -0,0 +1,46 @@
+## GitLab Push EventListener
+
+Creates an EventListener that listens for Gitlab webhook events. To expose the
+EventListener, add a `serviceType: LoadBalancer`.
+
+### Try it out locally:
+
+1. Create the service account:
+
+```shell script
+kubectl apply -f examples/role-resources/triggerbinding-roles
+kubectl apply -f examples/role-resources/
+```
+
+1. Create the Gitlab EventListener:
+
+```shell script
+kubectl apply -f examples/gitlab/gitlab-push-listener.yaml
+```
+
+1. Port forward:
+
+```shell script
+kubectl port-forward \
+ "$(kubectl get pod --selector=eventlistener=gitlab-listener -oname)" \
+  8080
+```
+
+2. Test by sending the sample payload.
+
+```shell script
+curl -v \
+-H 'X-GitLab-Token: abcde' \
+-H 'X-Gitlab-Event: Push Hook' \
+-H 'Content-Type: application/json' \
+--data-binary "@gitlab-push-event.json" \
+http://localhost:8080
+```
+
+The response status code should be `201 Created`
+
+3. You should see a new TaskRun that got created:
+
+```shell script
+kubectl get taskruns |grep gitlab-run-
+```

examples/gitlab/gitlab-push-event.json

@@ -0,0 +1,68 @@
+{
+  "object_kind": "push",
+  "before": "95790bf891e76fee5e1747ab589903a6a1f80f22",
+  "after": "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+  "ref": "refs/heads/master",
+  "checkout_sha": "1a1736ec3d7b03349b31218a2f2c572c7c7206d6",
+  "user_id": 4,
+  "user_name": "John Smith",
+  "user_username": "jsmith",
+  "user_email": "[email protected]",
+  "user_avatar": "https://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=8://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=80",
+  "project_id": 15,
+  "project":{
+    "id": 15,
+    "name":"Diaspora",
+    "description":"",
+    "web_url":"http://example.com/mike/diaspora",
+    "avatar_url":null,
+    "git_ssh_url":"[email protected]:mike/diaspora.git",
+    "git_http_url":"http://example.com/mike/diaspora.git",
+    "namespace":"Mike",
+    "visibility_level":0,
+    "path_with_namespace":"mike/diaspora",
+    "default_branch":"master",
+    "homepage":"http://example.com/mike/diaspora",
+    "url":"[email protected]:mike/diaspora.git",
+    "ssh_url":"[email protected]:mike/diaspora.git",
+    "http_url":"http://example.com/mike/diaspora.git"
+  },
+  "repository":{
+    "name": "Diaspora",
+    "url": "[email protected]:mike/diaspora.git",
+    "description": "",
+    "homepage": "http://example.com/mike/diaspora",
+    "git_http_url":"https://gitlab.com/dibyom/triggers.git",
+    "git_ssh_url":"[email protected]:mike/diaspora.git",
+    "visibility_level":0
+  },
+  "commits": [
+    {
+      "id": "b6568db1bc1dcd7f8b4d5a946b0b91f9dacd7327",
+      "message": "Update Catalan translation to e38cb41.",
+      "timestamp": "2011-12-12T14:27:31+02:00",
+      "url": "http://example.com/mike/diaspora/commit/b6568db1bc1dcd7f8b4d5a946b0b91f9dacd7327",
+      "author": {
+        "name": "Jordi Mallach",
+        "email": "[email protected]"
+      },
+      "added": ["CHANGELOG"],
+      "modified": ["app/controller/application.rb"],
+      "removed": []
+    },
+    {
+      "id": "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+      "message": "fixed readme",
+      "timestamp": "2012-01-03T23:36:29+02:00",
+      "url": "http://example.com/mike/diaspora/commit/da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+      "author": {
+        "name": "GitLab dev user",
+        "email": "gitlabdev@dv6700.(none)"
+      },
+      "added": ["CHANGELOG"],
+      "modified": ["app/controller/application.rb"],
+      "removed": []
+    }
+  ],
+  "total_commits_count": 4
+}

examples/gitlab/gitlab-push-listener.yaml

@@ -0,0 +1,75 @@
+apiVersion: tekton.dev/v1alpha1
+kind: TriggerTemplate
+metadata:
+  name: gitlab-echo-template
+spec:
+  params:
+  - name: gitrevision
+  - name: gitrepositoryurl
+  resourcetemplates:
+  - apiVersion: tekton.dev/v1alpha1
+    kind: TaskRun
+    metadata:
+      generateName: gitlab-run-
+    spec:
+      taskSpec:
+        inputs:
+          resources:
+            - name: source
+              type: git
+        steps:
+          - image: ubuntu
+            script: |
+              #! /bin/bash
+              ls -al $(inputs.resources.source.path)
+      inputs:
+        resources:
+        - name: source
+          resourceSpec:
+            type: git
+            params:
+            - name: revision
+              value: $(params.gitrevision)
+            - name: url
+              value: $(params.gitrepositoryurl)
+---
+apiVersion: tekton.dev/v1alpha1
+kind: TriggerBinding
+metadata:
+  name: gitlab-push-binding
+spec:
+  params:
+  - name: gitrevision
+    value: $(body.checkout_sha)
+  - name: gitrepositoryurl
+    value: $(body.repository.git_http_url)
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: gitlab-secret
+type: Opaque
+stringData:
+  gitlabToken: abcde
+---
+apiVersion: tekton.dev/v1alpha1
+kind: EventListener
+metadata:
+  name: gitlab-listener
+spec:
+  # from examples/role-resources/servicaccount.yaml
+  serviceAccountName: tekton-triggers-example-sa
+  triggers:
+    - name: gitlab-push-events-trigger
+      interceptors:
+        - gitlab:
+            secretRef:
+              secretName: gitlab-secret
+              secretKey: gitlabToken
+            eventTypes:
+              - Push Hook # Only push events
+      bindings:
+        - name: gitlab-push-binding
+      template:
+        name: gitlab-echo-template
+---