From 0ef2f37d157a51e509e3635f0e602dbd10e0f904 Mon Sep 17 00:00:00 2001
From: "g. nicholas d'andrea" <nick@gnidan.org>
Date: Tue, 4 Feb 2025 01:10:15 -0500
Subject: [PATCH] Parse schema YAML using anchor merges from 1.1

---
 packages/format/src/describe.ts | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/packages/format/src/describe.ts b/packages/format/src/describe.ts
index f5d1a0acf..f12eb3260 100644
--- a/packages/format/src/describe.ts
+++ b/packages/format/src/describe.ts
@@ -21,6 +21,11 @@ export interface SchemaInfo {
   rootSchema: JSONSchema;
 }
 
+const parseOptions = {
+  // merge keys were removed from YAML 1.2 spec but used by these schemas
+  merge: true
+};
+
 export function describeSchema({
   schema,
   pointer
@@ -55,8 +60,8 @@ function describeSchemaById({
 
   const yaml = pointToYaml(rootYaml, pointer);
 
-  const schema = YAML.parse(yaml);
-  const rootSchema = YAML.parse(rootYaml);
+  const schema = YAML.parse(yaml, parseOptions);
+  const rootSchema = YAML.parse(rootYaml, parseOptions);
 
   return {
     id,
@@ -73,8 +78,8 @@ function describeSchemaByYaml({
 }: DescribeSchemaOptions<SchemaByYaml>): SchemaInfo {
   const yaml = pointToYaml(referencedYaml, pointer);
 
-  const schema = YAML.parse(yaml);
-  const rootSchema = YAML.parse(referencedYaml);
+  const schema = YAML.parse(yaml, parseOptions);
+  const rootSchema = YAML.parse(referencedYaml, parseOptions);
 
   const id = schema.$id;
 
@@ -104,7 +109,7 @@ function describeSchemaByObject({
 
   const yaml = pointToYaml(rootYaml, pointer);
 
-  const schema = YAML.parse(yaml);
+  const schema = YAML.parse(yaml, parseOptions);
 
   const id = schema.$id;