Revert removal of PipelineResources related fields

This commit brings back PipelineResources related fields to the API structs,
marking them as deprecated and unused. The JSON tags are removed, so CRDs
cannot be defined with these fields. Keeping these fields in the Go structs
allows clients to maintain backwards compatibility with older servers, and
allows downstream projects such as chains to continue to work with older CRDs
that may define these fields.

hack/update-codegen.sh

@@ -32,6 +32,16 @@ GOFLAGS="-mod=vendor"
 # --output-base    because this script should also be able to run inside the vendor dir of
 #                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
 #                  instead of the $GOPATH directly. For normal projects this can be dropped.
+
+# This generates deepcopy,client,informer and lister for the resource package (v1alpha1)
+# This is separate from the pipeline package as resource are staying in v1alpha1 and they
+# need to be separated (at least in terms of go package) from the pipeline's packages to
+# not having dependency cycle.
+bash ${REPO_ROOT_DIR}/hack/generate-groups.sh "deepcopy,client,informer,lister" \
+  github.com/tektoncd/pipeline/pkg/client/resource github.com/tektoncd/pipeline/pkg/apis \
+  "resource:v1alpha1" \
+  --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
+
 # This generates deepcopy,client,informer and lister for the pipeline package (v1alpha1, v1beta1, and v1)
 bash ${REPO_ROOT_DIR}/hack/generate-groups.sh "deepcopy,client,informer,lister" \
   github.com/tektoncd/pipeline/pkg/client github.com/tektoncd/pipeline/pkg/apis \
@@ -70,6 +80,14 @@ ${PREFIX}/deepcopy-gen \
 -i github.com/tektoncd/pipeline/pkg/apis/run/v1alpha1
 
 # Knative Injection
+
+# This generates the knative injection packages for the resource package (v1alpha1).
+# This is separate from the pipeline package for the same reason as client and all (see above).
+bash ${REPO_ROOT_DIR}/hack/generate-knative.sh "injection" \
+  github.com/tektoncd/pipeline/pkg/client/resource github.com/tektoncd/pipeline/pkg/apis \
+  "resource:v1alpha1" \
+  --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
+
 # This generates the knative inject packages for the pipeline package (v1alpha1, v1beta1, v1).
 bash ${REPO_ROOT_DIR}/hack/generate-knative.sh "injection" \
   github.com/tektoncd/pipeline/pkg/client github.com/tektoncd/pipeline/pkg/apis \

pkg/apis/pipeline/v1beta1/pipeline_types.go

@@ -94,6 +94,9 @@ type PipelineSpec struct {
 	// used to populate a UI.
 	// +optional
 	Description string `json:"description,omitempty"`
+	// Deprecated: Unused, preserved only for backwards compatibility
+	// +listType=atomic
+	Resources []PipelineDeclaredResource `json:"resources,omitempty"`
 	// Tasks declares the graph of Tasks that execute when this Pipeline is run.
 	// +listType=atomic
 	Tasks []PipelineTask `json:"tasks,omitempty"`
@@ -201,6 +204,10 @@ type PipelineTask struct {
 	// +listType=atomic
 	RunAfter []string `json:"runAfter,omitempty"`
 
+	// Deprecated: Unused, preserved only for backwards compatibility
+	// +optional
+	Resources *PipelineTaskResources `json:"resources,omitempty"`
+
 	// Parameters declares parameters passed to this task.
 	// +optional
 	// +listType=atomic
@@ -451,6 +458,10 @@ func (pt PipelineTask) Validate(ctx context.Context) (errs *apis.FieldError) {
 
 	errs = errs.Also(pt.validateEmbeddedOrType())
 
+	if pt.Resources != nil {
+		errs = errs.Also(apis.ErrDisallowedFields("resources"))
+	}
+
 	cfg := config.FromContextOrDefaults(ctx)
 	// Pipeline task having taskRef/taskSpec with APIVersion is classified as custom task
 	switch {

pkg/apis/pipeline/v1beta1/pipeline_validation.go

@@ -56,6 +56,9 @@ func (ps *PipelineSpec) Validate(ctx context.Context) (errs *apis.FieldError) {
 	}
 	// PipelineTask must have a valid unique label and at least one of taskRef or taskSpec should be specified
 	errs = errs.Also(ValidatePipelineTasks(ctx, ps.Tasks, ps.Finally))
+	if len(ps.Resources) > 0 {
+		errs = errs.Also(apis.ErrDisallowedFields("resources"))
+	}
 	// Validate the pipeline task graph
 	errs = errs.Also(validateGraph(ps.Tasks))
 	// The parameter variables should be valid

pkg/apis/pipeline/v1beta1/pipeline_validation_test.go

@@ -596,6 +596,47 @@ func TestPipelineSpec_Validate_Failure(t *testing.T) {
 			Message: `missing field(s)`,
 			Paths:   []string{"tasks[1].when[0]", "finally[0].when[0]"},
 		},
+	}, {
+		name: "uses resources",
+		ps: &PipelineSpec{
+			Resources: []PipelineDeclaredResource{{Name: "foo"}},
+			Tasks: []PipelineTask{{
+				Name:    "valid-pipeline-task",
+				TaskRef: &TaskRef{Name: "foo-task"},
+			}},
+		},
+		expectedError: apis.FieldError{
+			Message: `must not set the field(s)`,
+			Paths:   []string{"resources"},
+		},
+	}, {
+		name: "uses resources in tasks",
+		ps: &PipelineSpec{
+			Tasks: []PipelineTask{{
+				Name:     "pipeline-task",
+				TaskSpec: &EmbeddedTask{TaskSpec: TaskSpec{Resources: &TaskResources{}, Steps: []Step{{Image: "my-image"}}}},
+			}},
+		},
+		expectedError: apis.FieldError{
+			Message: `must not set the field(s)`,
+			Paths:   []string{"tasks[0].taskSpec.resources"},
+		},
+	}, {
+		name: "uses resources in finally",
+		ps: &PipelineSpec{
+			Tasks: []PipelineTask{{
+				Name:     "valid-pipeline-task",
+				TaskSpec: &EmbeddedTask{TaskSpec: TaskSpec{Steps: []Step{{Image: "my-image"}}}},
+			}},
+			Finally: []PipelineTask{{
+				Name:     "finally",
+				TaskSpec: &EmbeddedTask{TaskSpec: TaskSpec{Resources: &TaskResources{}, Steps: []Step{{Image: "my-image"}}}},
+			}},
+		},
+		expectedError: apis.FieldError{
+			Message: `must not set the field(s)`,
+			Paths:   []string{"finally[0].taskSpec.resources"},
+		},
 	}}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

pkg/apis/pipeline/v1beta1/pipelinerun_types.go

@@ -223,6 +223,13 @@ type PipelineRunSpec struct {
 	PipelineRef *PipelineRef `json:"pipelineRef,omitempty"`
 	// +optional
 	PipelineSpec *PipelineSpec `json:"pipelineSpec,omitempty"`
+	// Resources is a list of bindings specifying which actual instances of
+	// PipelineResources to use for the resources the Pipeline has declared
+	// it needs.
+	//
+	// Deprecated: Unused, preserved only for backwards compatibility
+	// +listType=atomic
+	Resources []PipelineResourceBinding `json:"resources,omitempty"`
 	// Params is a list of parameter names and values.
 	// +listType=atomic
 	Params Params `json:"params,omitempty"`

pkg/apis/pipeline/v1beta1/pipelinerun_validation.go

@@ -131,6 +131,9 @@ func (ps *PipelineRunSpec) Validate(ctx context.Context) (errs *apis.FieldError)
 	if ps.PodTemplate != nil {
 		errs = errs.Also(validatePodTemplateEnv(ctx, *ps.PodTemplate))
 	}
+	if ps.Resources != nil {
+		errs = errs.Also(apis.ErrDisallowedFields("resources"))
+	}
 
 	return errs
 }

pkg/apis/pipeline/v1beta1/pipelinerun_validation_test.go

@@ -496,6 +496,18 @@ func TestPipelineRun_Invalid(t *testing.T) {
 			Message: "invalid value: PipelineRun cannot be Pending after it is started",
 			Paths:   []string{"spec.status"},
 		},
+	}, {
+		name: "uses resources",
+		pr: v1beta1.PipelineRun{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: "pipelinerunname",
+			},
+			Spec: v1beta1.PipelineRunSpec{
+				PipelineRef: &v1beta1.PipelineRef{Name: "foo"},
+				Resources:   []v1beta1.PipelineResourceBinding{{Name: "bar"}},
+			},
+		},
+		want: &apis.FieldError{Message: "must not set the field(s)", Paths: []string{"spec.resources"}},
 	}}
 
 	for _, tc := range tests {