[Backport release-1.1] Add a new configuration option for required field generation

pkg/config/common.go

@@ -124,10 +124,18 @@ func MoveToStatus(sch *schema.Resource, fieldpaths ...string) {
 	}
 }
 
+// MarkAsRequired marks the given fieldpaths as required without manipulating
+// the native field schema.
+func (r *Resource) MarkAsRequired(fieldpaths ...string) {
+	r.requiredFields = append(r.requiredFields, fieldpaths...)
+}
+
 // MarkAsRequired marks the schema of the given fieldpath as required. It's most
 // useful in cases where external name contains an optional parameter that is
 // defaulted by the provider but we need it to exist or to fix plain buggy
 // schemas.
+// Deprecated: Use Resource.MarkAsRequired instead.
+// This function will be removed in future versions.
 func MarkAsRequired(sch *schema.Resource, fieldpaths ...string) {
 	for _, fieldpath := range fieldpaths {
 		if s := GetSchema(sch, fieldpath); s != nil {

pkg/config/common_test.go

@@ -128,6 +128,7 @@ func TestDefaultResource(t *testing.T) {
 		cmpopts.IgnoreFields(ExternalName{}, "SetIdentifierArgumentFn", "GetExternalNameFn", "GetIDFn"),
 		cmpopts.IgnoreFields(Resource{}, "useTerraformPluginSDKClient"),
 		cmpopts.IgnoreFields(Resource{}, "useTerraformPluginFrameworkClient"),
+		cmpopts.IgnoreFields(Resource{}, "requiredFields"),
 	}
 
 	for name, tc := range cases {

pkg/config/resource.go

@@ -489,6 +489,15 @@ type Resource struct {
 	// the value of the generated Kind, for example:
 	// "TagParameters": "ClusterTagParameters"
 	OverrideFieldNames map[string]string
+
+	// requiredFields are the fields that will be marked as required in the
+	// generated CRD schema, although they are not required in the TF schema.
+	requiredFields []string
+}
+
+// RequiredFields returns slice of the marked as required fieldpaths.
+func (r *Resource) RequiredFields() []string {
+	return r.requiredFields
 }
 
 // ShouldUseTerraformPluginSDKClient returns whether to generate an SDKv2-based

pkg/types/builder.go

@@ -380,7 +380,7 @@ func newTopLevelRequiredParam(path string, includeInit bool) *topLevelRequiredPa
 }
 
 func (r *resource) addParameterField(f *Field, field *types.Var) {
-	requiredBySchema := !f.Schema.Optional
+	requiredBySchema := !f.Schema.Optional || f.Required
 	// Note(turkenh): We are collecting the top level required parameters that
 	// are not identifier fields. This is for generating CEL validation rules for
 	// those parameters and not to require them if the management policy is set

pkg/types/field.go

@@ -45,6 +45,7 @@ type Field struct {
 	TransformedName                          string
 	SelectorName                             string
 	Identifier                               bool
+	Required                                 bool
 	// Injected is set if this Field is an injected field to the Terraform
 	// schema as an object list map key for server-side apply merges.
 	Injected bool
@@ -120,6 +121,12 @@ func NewField(g *Builder, cfg *config.Resource, r *resource, sch *schema.Schema,
 		}
 	}
 
+	for _, required := range cfg.RequiredFields() {
+		if required == snakeFieldName {
+			f.Required = true
+		}
+	}
+
 	var commentText string
 	docString := getDocString(cfg, f, tfPath)
 	if len(docString) > 0 {