Add empty v1alpha2 package 🎐

This adds an empty v1alpha2 package, which serve as the base to port
v1alpha1 types to v1alpha2 while still being able to work on
v1alpha1 *and* do the appropriate refactoring while doing this.

Signed-off-by: Vincent Demeester <vdemeest@redhat.com>

hack/update-codegen.sh

@@ -30,7 +30,7 @@ KNATIVE_CODEGEN_PKG=${KNATIVE_CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 ./ven
 #                  instead of the $GOPATH directly. For normal projects this can be dropped.
 ${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
   github.com/tektoncd/pipeline/pkg/client github.com/tektoncd/pipeline/pkg/apis \
-  pipeline:v1alpha1 \
+  "pipeline:v1alpha1,v1alpha2" \
   --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
 
 # Depends on generate-groups.sh to install bin/deepcopy-gen
@@ -42,7 +42,7 @@ ${GOPATH}/bin/deepcopy-gen \
 # Knative Injection
 ${KNATIVE_CODEGEN_PKG}/hack/generate-knative.sh "injection" \
   github.com/tektoncd/pipeline/pkg/client github.com/tektoncd/pipeline/pkg/apis \
-  "pipeline:v1alpha1" \
+  "pipeline:v1alpha1,v1alpha2" \
   --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
 
 # Make sure our dependencies are up-to-date

pkg/apis/pipeline/v1alpha2/register.go

@@ -0,0 +1,66 @@
+/*
+Copyright 2019 The Tekton Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha2
+
+import (
+	"github.com/tektoncd/pipeline/pkg/apis/pipeline"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// SchemeGroupVersion is group version used to register these objects
+var SchemeGroupVersion = schema.GroupVersion{Group: pipeline.GroupName, Version: "v1alpha2"}
+
+// Kind takes an unqualified kind and returns back a Group qualified GroupKind
+func Kind(kind string) schema.GroupKind {
+	return SchemeGroupVersion.WithKind(kind).GroupKind()
+}
+
+// Resource takes an unqualified resource and returns a Group qualified GroupResource
+func Resource(resource string) schema.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+var (
+	schemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
+
+	// AddToScheme adds Build types to the scheme.
+	AddToScheme = schemeBuilder.AddToScheme
+)
+
+// Adds the list of known types to Scheme.
+func addKnownTypes(scheme *runtime.Scheme) error {
+	scheme.AddKnownTypes(SchemeGroupVersion)
+	// &Task{},
+	// &TaskList{},
+	// &Condition{},
+	// &ConditionList{},
+	// &ClusterTask{},
+	// &ClusterTaskList{},
+	// &TaskRun{},
+	// &TaskRunList{},
+	// &Pipeline{},
+	// &PipelineList{},
+	// &PipelineRun{},
+	// &PipelineRunList{},
+	// &PipelineResource{},
+	// &PipelineResourceList{},
+
+	metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
+	return nil
+}

pkg/apis/pipeline/v1alpha2/task_types.go

@@ -0,0 +1,17 @@
+/*
+Copyright 2019 The Tekton Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha2