Remove the custom "name" parameter from cluster resources.

This is redundant with the Name that Tasks already declare on Resources.
The name is used both to name the cluster in the kubeconfig and to set the
path for the kubeconfig. Using a name on the resource itself means Tasks can't
know where to expect this file.

docs/resources.md

@@ -552,8 +552,6 @@ cluster. The kubeconfig will be placed in
 
 The Cluster resource has the following parameters:
 
--   `name` (required): The name to be given to the target cluster, will be used
-    in the kubeconfig and also as part of the path to the kubeconfig file
 -   `url` (required): Host url of the master node
 -   `username` (required): the user with access to the cluster
 -   `password`: to be used for clusters with basic auth
@@ -687,8 +685,6 @@ spec:
   params:
     - name: url
       value: https://<ip address determined above>
-    - name: name
-      value: mycluster
   secrets:
     - fieldName: cadata
       secretName: cluster-ca-data

pkg/apis/pipeline/v1alpha1/cluster_resource.go

@@ -62,6 +62,7 @@ func NewClusterResource(kubeconfigWriterImage string, r *PipelineResource) (*Clu
 	clusterResource := ClusterResource{
 		Type:                  r.Spec.Type,
 		KubeconfigWriterImage: kubeconfigWriterImage,
+		Name:                  r.Name,
 	}
 	for _, param := range r.Spec.Params {
 		switch {

pkg/apis/pipeline/v1alpha1/pipelineresource_validation.go

@@ -25,6 +25,7 @@ import (
 	"github.com/tektoncd/pipeline/pkg/apis/validate"
 	"k8s.io/apimachinery/pkg/api/equality"
 	"knative.dev/pkg/apis"
+	logging "knative.dev/pkg/logging"
 )
 
 var _ apis.Validatable = (*PipelineResource)(nil)
@@ -74,8 +75,9 @@ func (rs *PipelineResourceSpec) Validate(ctx context.Context) *apis.FieldError {
 			}
 		}
 
-		if !nameFound {
-			return apis.ErrMissingField("name param")
+		if nameFound {
+			logging.FromContext(ctx).Warn(
+				"The name parameter on the cluster resource is deprecated. Support will be removed in a future release")
 		}
 		// One auth method must be supplied
 		if !(authFound) {

pkg/apis/pipeline/v1alpha1/pipelineresource_validation_test.go

@@ -54,16 +54,6 @@ func TestResourceValidation_Invalid(t *testing.T) {
 			)),
 			want: apis.ErrMissingField("username or CAData  or token param"),
 		},
-		{
-			name: "cluster with missing name",
-			res: tb.PipelineResource("test-cluster-resource", "foo", tb.PipelineResourceSpec(
-				v1alpha1.PipelineResourceTypeCluster,
-				tb.PipelineResourceSpecParam("url", "http://10.10.10.10"),
-				tb.PipelineResourceSpecParam("cadata", "bXktY2x1c3Rlci1jZXJ0Cg"),
-				tb.PipelineResourceSpecParam("token", "my-token"),
-			)),
-			want: apis.ErrMissingField("name param"),
-		},
 		{
 			name: "cluster with missing cadata",
 			res: tb.PipelineResource("test-cluster-resource", "foo", tb.PipelineResourceSpec(