[schema] Add IsOverlay option to disable codegen for particular resou…

…rces

pkg/codegen/nodejs/gen.go

@@ -1599,6 +1599,11 @@ func (mod *modContext) gen(fs fs) error {
 
 	// Resources
 	for _, r := range mod.resources {
+		if r.IsOverlay {
+			// This resource code is generated by the provider, so no further action is required.
+			return nil
+		}
+
 		externalImports, imports := codegen.NewStringSet(), map[string]codegen.StringSet{}
 		referencesNestedTypes := mod.getImportsForResource(r, externalImports, imports, r)
 
@@ -2225,6 +2230,11 @@ func LanguageResources(pkg *schema.Package) (map[string]LanguageResource, error)
 
 	for modName, mod := range modules {
 		for _, r := range mod.resources {
+			if r.IsOverlay {
+				// This resource code is generated by the provider, so no further action is required.
+				continue
+			}
+
 			packagePath := strings.Replace(modName, "/", ".", -1)
 			lr := LanguageResource{
 				Resource: r,

pkg/codegen/schema/schema.go

@@ -398,6 +398,8 @@ type Resource struct {
 	IsComponent bool
 	// Methods is the list of methods for the resource.
 	Methods []*Method
+	// IsOverlay indicates whether the resource code is an overlay provided by the package.
+	IsOverlay bool
 }
 
 // The set of resource paths where ReplaceOnChanges is true.
@@ -1046,6 +1048,7 @@ func (pkg *Package) marshalResource(r *Resource) (ResourceSpec, error) {
 		DeprecationMessage: r.DeprecationMessage,
 		IsComponent:        r.IsComponent,
 		Methods:            methods,
+		IsOverlay:          r.IsOverlay,
 	}, nil
 }
 
@@ -1429,6 +1432,8 @@ type ResourceSpec struct {
 	IsComponent bool `json:"isComponent,omitempty" yaml:"isComponent,omitempty"`
 	// Methods maps method names to functions in this schema.
 	Methods map[string]string `json:"methods,omitempty" yaml:"methods,omitempty"`
+	// IsOverlay indicates whether the resource code is an overlay provided by the package.
+	IsOverlay bool `json:"is_overlay,omitempty" yaml:"isOverlay,omitempty"`
 }
 
 // FunctionSpec is the serializable form of a function description.
@@ -2590,6 +2595,7 @@ func bindResource(path, token string, spec ResourceSpec, types *types,
 		Language:           language,
 		IsComponent:        spec.IsComponent,
 		Methods:            methods,
+		IsOverlay:          spec.IsOverlay,
 	}, diags, nil
 }