fix: hash ending path resolution fails (#1408)

.changeset/soft-planets-watch.md

@@ -0,0 +1,6 @@
+---
+"@redocly/openapi-core": patch
+"@redocly/cli": patch
+---
+
+Fixed an issue where `$ref`s ending in `#` (instead of `#/`) would break the application.

__tests__/bundle/reference-ending-in-hash/openapi.yaml

@@ -0,0 +1,10 @@
+openapi: 3.0.3
+paths:
+  /pets/{petId}:
+    get:
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: './schemas/Pet.json#'

__tests__/bundle/reference-ending-in-hash/redocly.yaml

@@ -0,0 +1,3 @@
+apis:
+  main:
+    root: ./openapi.yaml

__tests__/bundle/reference-ending-in-hash/schemas/Pet.json

@@ -0,0 +1 @@
+{}

__tests__/bundle/reference-ending-in-hash/snapshot.js

@@ -0,0 +1,21 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`E2E bundle reference-ending-in-hash 1`] = `
+openapi: 3.0.3
+paths:
+  /pets/{petId}:
+    get:
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Pet'
+components:
+  schemas:
+    Pet: {}
+
+bundling ./openapi.yaml...
+📦 Created a bundle for ./openapi.yaml at stdout <test>ms.
+
+`;

packages/core/src/ref-utils.ts

@@ -43,15 +43,15 @@ export function escapePointer<T extends string | number>(fragment: T): T {
 }
 
 export function parseRef(ref: string): { uri: string | null; pointer: string[] } {
-  const [uri, pointer] = ref.split('#/');
+  const [uri, pointer = ''] = ref.split('#');
   return {
     uri: uri || null,
-    pointer: pointer ? pointer.split('/').map(unescapePointer).filter(isTruthy) : [],
+    pointer: parsePointer(pointer),
   };
 }
 
 export function parsePointer(pointer: string) {
-  return pointer.substr(2).split('/').map(unescapePointer);
+  return pointer.split('/').map(unescapePointer).filter(isTruthy);
 }
 
 export function pointerBaseName(pointer: string) {