Fix for issue 20256: Bug Report: converting circular structure to JSON error

Signed-off-by: bnechyporenko <bnechyporenko@bol.com>

plugins/scaffolder-react/package.json

@@ -66,6 +66,7 @@
     "@types/json-schema": "^7.0.9",
     "@types/react": "^16.13.1 || ^17.0.0",
     "classnames": "^2.2.6",
+    "flatted": "3.2.9",
     "humanize-duration": "^3.25.1",
     "immer": "^9.0.1",
     "json-schema": "^0.4.0",

plugins/scaffolder-react/src/next/lib/schema.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 import { JsonObject } from '@backstage/types';
+import { stringify, parse } from 'flatted';
 import { FieldValidation, UiSchema } from '@rjsf/utils';
 
 function isObject(value: unknown): value is JsonObject {
@@ -123,7 +124,7 @@ export const extractSchemaFromStep = (
   inputStep: JsonObject,
 ): { uiSchema: UiSchema; schema: JsonObject } => {
   const uiSchema: UiSchema = {};
-  const returnSchema: JsonObject = JSON.parse(JSON.stringify(inputStep));
+  const returnSchema: JsonObject = parse(stringify(inputStep));
   extractUiSchema(returnSchema, uiSchema);
   return { uiSchema, schema: returnSchema };
 };

yarn.lock

@@ -8420,6 +8420,7 @@ __metadata:
     "@types/luxon": ^3.0.0
     "@types/react": ^16.13.1 || ^17.0.0
     classnames: ^2.2.6
+    flatted: 3.2.9
     humanize-duration: ^3.25.1
     immer: ^9.0.1
     json-schema: ^0.4.0
@@ -27530,10 +27531,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"flatted@npm:^3.1.0":
-  version: 3.1.1
-  resolution: "flatted@npm:3.1.1"
-  checksum: 508935e3366d95444131f0aaa801a4301f24ea5bcb900d12764e7335b46b910730cc1b5bcfcfb8eccb7c8db261ba0671c6a7ca30d10870ff7a7756dc7e731a7a
+"flatted@npm:3.2.9, flatted@npm:^3.1.0":
+  version: 3.2.9
+  resolution: "flatted@npm:3.2.9"
+  checksum: f14167fbe26a9d20f6fca8d998e8f1f41df72c8e81f9f2c9d61ed2bea058248f5e1cbd05e7f88c0e5087a6a0b822a1e5e2b446e879f3cfbe0b07ba2d7f80b026
   languageName: node
   linkType: hard