From 60ecc72dfab660eea795fb1307df8596d65cd78b Mon Sep 17 00:00:00 2001
From: Shawn Erquhart <shawn@erquh.art>
Date: Wed, 5 Feb 2020 03:14:40 -0500
Subject: [PATCH] fix(core): strip closing separators in yaml files (#3198)

---
 .../src/formats/__tests__/yaml.spec.js          | 17 +++++++++++++++++
 packages/netlify-cms-core/src/formats/yaml.js   |  3 +++
 2 files changed, 20 insertions(+)
 create mode 100644 packages/netlify-cms-core/src/formats/__tests__/yaml.spec.js

diff --git a/packages/netlify-cms-core/src/formats/__tests__/yaml.spec.js b/packages/netlify-cms-core/src/formats/__tests__/yaml.spec.js
new file mode 100644
index 00000000..520dfb80
--- /dev/null
+++ b/packages/netlify-cms-core/src/formats/__tests__/yaml.spec.js
@@ -0,0 +1,17 @@
+import yaml from '../yaml';
+
+describe('yaml', () => {
+  describe('fromFile', () => {
+    test('loads valid yaml', () => {
+      expect(yaml.fromFile('[]')).toEqual([]);
+    });
+    test('does not fail on closing separator', () => {
+      expect(yaml.fromFile('---\n[]\n---')).toEqual([]);
+    });
+  });
+  describe('toFile', () => {
+    test('outputs valid yaml', () => {
+      expect(yaml.toFile([])).toEqual('[]\n');
+    });
+  });
+});
diff --git a/packages/netlify-cms-core/src/formats/yaml.js b/packages/netlify-cms-core/src/formats/yaml.js
index 18d26a64..cc29b595 100644
--- a/packages/netlify-cms-core/src/formats/yaml.js
+++ b/packages/netlify-cms-core/src/formats/yaml.js
@@ -37,6 +37,9 @@ const OutputSchema = new yaml.Schema({
 
 export default {
   fromFile(content) {
+    if (content && content.trim().endsWith('---')) {
+      content = content.trim().slice(0, -3);
+    }
     return yaml.safeLoad(content);
   },