Add Support for Embedding TriggerBindingSpec in EL

TriggerBindingSpec can be added to EventListener Trigger

docs/clustertriggerbindings.md

@@ -48,8 +48,10 @@ spec:
       bindings:
         - name: pipeline-clusterbinding
           kind: ClusterTriggerBinding
+          ref: pipeline-clusterbinding
         - name: message-clusterbinding
           kind: ClusterTriggerBinding
+          ref: message-clusterbinding
       template:
         name: pipeline-template
 ```

docs/eventlisteners.md

@@ -149,7 +149,7 @@ The `triggers` field is required. Each EventListener can consist of one or more
 - `name` - (Optional) a valid
   [Kubernetes name](https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#syntax-and-character-set)
 - [`interceptors`](#interceptors) - (Optional) list of interceptors to use
-- `bindings` - A list of names of `TriggerBindings` to use
+- `bindings` - A list of names of `TriggerBindings` to use or embedded TriggerBindingsSpecs to use.
 - `template` - The name of `TriggerTemplate` to use
 
 ```yaml
@@ -160,7 +160,14 @@ triggers:
           eventTypes: ["pull_request"]
     bindings:
       - name: pipeline-binding
+        ref:  pipeline-binding
       - name: message-binding
+        ref:  message-binding
+      - name: embed-binding
+        spec:
+            params:
+            - name: gitrevision
+              value: $(body.head_commit.id)
     template:
       name: pipeline-template
 ```
@@ -180,7 +187,9 @@ triggers:
           eventTypes: ["pull_request"]
     bindings:
       - name: pipeline-binding
+        ref:  pipeline-binding
       - name: message-binding
+        ref:  message-binding
     template:
       name: pipeline-template
 ``` 
@@ -316,6 +325,7 @@ spec:
               namespace: default
       bindings:
         - name: pipeline-binding
+          ref: pipeline-binding
       template:
         name: pipeline-template
 ```
@@ -361,6 +371,7 @@ spec:
               - pull_request
       bindings:
         - name: pipeline-binding
+          ref: pipeline-binding
       template:
         name: pipeline-template
 ```
@@ -405,6 +416,7 @@ spec:
               - Push Hook
       bindings:
         - name: pipeline-binding
+          ref:  pipeline-binding
       template:
         name: pipeline-template
 ```
@@ -450,6 +462,7 @@ spec:
             filter: "header.canonical('X-GitHub-Event') == 'push'"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template
 ```
@@ -488,6 +501,7 @@ spec:
             filter: "header.canonical('X-GitHub-Event') == 'push'"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template
 ```
@@ -515,6 +529,7 @@ spec:
               expression: "truncate(body.pull_request.head.sha, 7)"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template
 ```
@@ -544,6 +559,7 @@ spec:
               expression: "split(body.ref, '/')[2]"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template
 ```

examples/eventlisteners/cel-eventlistener-interceptor-with-secret.yaml

@@ -19,5 +19,6 @@ spec:
             filter: "'test-secret'.compareSecret('token', 'mysecret')"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template

examples/eventlisteners/cel-eventlistener-interceptor.yaml

@@ -22,5 +22,6 @@ spec:
             filter: "header.canonical('X-GitHub-Event') == 'push'"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template

examples/eventlisteners/cel-eventlistener-multiple-overlays.yaml

@@ -15,5 +15,6 @@ spec:
               expression: "split(body.ref, '/')[2]"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template

examples/eventlisteners/cel-eventlistener-no-filter.yaml

@@ -13,5 +13,6 @@ spec:
               expression: "truncate(body.pull_request.head.sha, 7)"
       bindings:
       - name: pipeline-binding
+        ref: pipeline-binding
       template:
         name: pipeline-template

examples/eventlisteners/eventlistener-clustertriggerbinding.yaml

@@ -10,7 +10,9 @@ spec:
       bindings:
         - name: pipeline-clusterbinding
           kind: ClusterTriggerBinding
+          ref: pipeline-clusterbinding
         - name: message-clusterbinding
           kind: ClusterTriggerBinding
+          ref: message-clusterbinding
       template:
         name: pipeline-template

examples/eventlisteners/eventlistener-embedded-bindings.yaml

@@ -0,0 +1,19 @@
+---
+apiVersion: triggers.tekton.dev/v1alpha1
+kind: EventListener
+metadata:
+  name: listener-embed-binding
+spec:
+  serviceAccountName: tekton-triggers-example-sa
+  triggers:
+    - name: foo-trig
+      bindings:
+        - name: pipeline-binding
+          ref: pipeline-binding
+        - name: message-binding
+          spec:
+            params:
+              - name: message
+                value: Hello from the Triggers EventListener(listener-embed-binding)!
+      template:
+        name: pipeline-template

examples/eventlisteners/eventlistener-interceptor.yaml

@@ -23,5 +23,6 @@ spec:
               namespace: default
       bindings:
         - name: pipeline-binding
+          ref: pipeline-binding
       template:
         name: pipeline-template

examples/eventlisteners/eventlistener-multiinterceptor.yaml

@@ -29,5 +29,6 @@ spec:
               namespace: default
       bindings:
         - name: pipeline-binding
+          ref: pipeline-binding
       template:
         name: pipeline-template

examples/eventlisteners/eventlistener.yaml

@@ -9,6 +9,8 @@ spec:
     - name: foo-trig
       bindings:
         - name: pipeline-binding
+          ref: pipeline-binding
         - name: message-binding
+          ref: message-binding
       template:
         name: pipeline-template

examples/eventlisteners/github-eventlistener-interceptor.yaml

@@ -16,5 +16,6 @@ spec:
               - pull_request
       bindings:
         - name: pipeline-binding
+          ref: pipeline-binding
       template:
         name: pipeline-template

pkg/apis/triggers/v1alpha1/event_listener_defaults.go

@@ -26,6 +26,8 @@ func (el *EventListener) SetDefaults(ctx context.Context) {
 		// set defaults
 		for i := range el.Spec.Triggers {
 			defaultBindings(&el.Spec.Triggers[i])
+			// TODO: Remove this before v0.6 release.
+			defaultMandatoryRef((&el.Spec.Triggers[i]))
 		}
 	}
 }
@@ -40,3 +42,14 @@ func defaultBindings(t *EventListenerTrigger) {
 		}
 	}
 }
+
+// set default TriggerBinding kind for Bindings
+func defaultMandatoryRef(t *EventListenerTrigger) {
+	if len(t.Bindings) > 0 {
+		for _, b := range t.Bindings {
+			if b.Ref == "" && b.Spec == nil {
+				b.Ref = b.Name
+			}
+		}
+	}
+}

pkg/apis/triggers/v1alpha1/event_listener_defaults_test.go

@@ -38,14 +38,17 @@ func TestEventListenerSetDefaults(t *testing.T) {
 					Bindings: []*v1alpha1.EventListenerBinding{
 						{
 							Name: "binding",
+							Ref:  "binding",
 						},
 						{
 							Name: "namespace-binding",
 							Kind: v1alpha1.NamespacedTriggerBindingKind,
+							Ref:  "namespace-binding",
 						},
 						{
 							Name: "cluster-binding",
 							Kind: v1alpha1.ClusterTriggerBindingKind,
+							Ref:  "cluster-binding",
 						},
 					},
 				}},
@@ -59,14 +62,17 @@ func TestEventListenerSetDefaults(t *testing.T) {
 						{
 							Name: "binding",
 							Kind: v1alpha1.NamespacedTriggerBindingKind,
+							Ref:  "binding",
 						},
 						{
 							Name: "namespace-binding",
 							Kind: v1alpha1.NamespacedTriggerBindingKind,
+							Ref:  "namespace-binding",
 						},
 						{
 							Name: "cluster-binding",
 							Kind: v1alpha1.ClusterTriggerBindingKind,
+							Ref:  "cluster-binding",
 						},
 					},
 				}},

pkg/apis/triggers/v1alpha1/event_listener_types.go

@@ -134,9 +134,12 @@ type SecretRef struct {
 
 // EventListenerBinding refers to a particular TriggerBinding or ClusterTriggerBindingresource.
 type EventListenerBinding struct {
-	Name       string             `json:"name"`
-	Kind       TriggerBindingKind `json:"kind"`
-	APIVersion string             `json:"apiversion,omitempty"`
+	Name string             `json:"name"`
+	Kind TriggerBindingKind `json:"kind"`
+	// +optional
+	Ref        string              `json:"ref"`
+	Spec       *TriggerBindingSpec `json:"spec"`
+	APIVersion string              `json:"apiversion,omitempty"`
 }
 
 // EventListenerTemplate refers to a particular TriggerTemplate resource.

pkg/apis/triggers/v1alpha1/event_listener_validation.go

@@ -50,7 +50,17 @@ func (t *EventListenerTrigger) validate(ctx context.Context) *apis.FieldError {
 			return apis.ErrMissingField(fmt.Sprintf("bindings[%d].name", i))
 		}
 
-		if b.Kind != NamespacedTriggerBindingKind && b.Kind != ClusterTriggerBindingKind {
+		// Either Ref or Spec should be present
+		if b.Ref == "" && b.Spec == nil {
+			return apis.ErrMissingOneOf(fmt.Sprintf("bindings[%d].Ref", i), fmt.Sprintf("bindings[%d].Spec", i))
+		}
+
+		// Both Ref and Spec can't be present at the same time
+		if b.Ref != "" && b.Spec != nil {
+			return apis.ErrMultipleOneOf(fmt.Sprintf("bindings[%d].Ref", i), fmt.Sprintf("bindings[%d].Spec", i))
+		}
+
+		if b.Ref != "" && b.Kind != NamespacedTriggerBindingKind && b.Kind != ClusterTriggerBindingKind {
 			return apis.ErrInvalidValue(fmt.Errorf("invalid kind"), fmt.Sprintf("bindings[%d].kind", i))
 		}
 	}