🐛 Fix successive reference handling

Fixes #3689

Signed-off-by: Alexandre Franke <alexandre.franke@matrix.org>

data/api/server-server/transactions.yaml

@@ -69,7 +69,7 @@ paths:
                       $ref: "definitions/edu.yaml"
           example: {
             "$ref": "examples/transaction.json",
-            "edus": [{"$ref": "edu.json"}] # Relative to the examples directory
+            "edus": [{"$ref": "examples/edu.json"}] # Relative to the examples directory
           }
       responses:
         200:

scripts/dump-swagger.py

@@ -37,11 +37,18 @@ def resolve_references(path, schema):
         # do $ref first
         if '$ref' in schema:
             value = schema['$ref']
+            previous_path = path
             path = os.path.join(os.path.dirname(path), value)
-            with open(path, encoding="utf-8") as f:
-                ref = yaml.safe_load(f)
-            result = resolve_references(path, ref)
-            del schema['$ref']
+            try:
+                with open(path, encoding="utf-8") as f:
+                    ref = yaml.safe_load(f)
+                result = resolve_references(path, ref)
+                del schema['$ref']
+                path = previous_path
+            except FileNotFoundError:
+                print("Resolving {}".format(schema))
+                print("File not found: {}".format(path))
+                result = {}
         else:
             result = {}