Fix Maximum call stack size exceeded error when dereferencing large O…

…penAPI document

packages/criteria-openapi/src/openapi-index/OpenAPIIndex.ts

@@ -81,7 +81,16 @@ export class OpenAPIIndex extends DocumentIndex {
       this.references.set(reference, info)
     })
 
-    return chainForEach(foundReferences.values(), (info: ReferenceInfo<Metadata>) => {
+    // Help prevent Maximum call stack size exceeded errors
+    const unindexedReferences = [...foundReferences.values()].filter((info) => {
+      if (this.isURIIndexed(info.resolvedURI)) {
+        return false
+      }
+      const { absoluteURI, fragment } = splitFragment(info.resolvedURI)
+      return !this.isURIIndexed(absoluteURI)
+    })
+
+    return chainForEach(unindexedReferences.values(), (info: ReferenceInfo<Metadata>) => {
       if (this.isURIIndexed(info.resolvedURI)) {
         return
       }

packages/criteria-openapi/test/v3.0/github/index.test.ts

@@ -0,0 +1,28 @@
+/* eslint-env jest */
+import { resolve } from 'path'
+import { dereferenceOpenAPI } from '../../../src/v3.0'
+import retrieveFromFilesystem from '../../util/retrieveFromFilesystem'
+import openAPI from './openapi.json'
+
+describe('GitHub OpenAPI', () => {
+  describe('dereferenceOpenAPI()', () => {
+    describe('synchronous', () => {
+      test('does not result in Maximum call stack size exceeded', () => {
+        const output = dereferenceOpenAPI(openAPI as any, {
+          baseURI: resolve(__dirname, 'openapi.json'),
+          retrieve: retrieveFromFilesystem
+        }) as any
+        expect(output).toMatchObject({ openapi: '3.0.3' })
+      })
+    })
+    describe('asynchronous', () => {
+      test('does not result in Maximum call stack size exceeded', async () => {
+        const output = (await dereferenceOpenAPI(openAPI as any, {
+          baseURI: resolve(__dirname, 'openapi.json'),
+          retrieve: async (uri) => await retrieveFromFilesystem(uri)
+        })) as any
+        expect(output).toMatchObject({ openapi: '3.0.3' })
+      })
+    })
+  })
+})