From 7f1ea6f0cc3da333e099cf428760d965a40a5354 Mon Sep 17 00:00:00 2001
From: Raymond Feng <enjoyjava@gmail.com>
Date: Wed, 28 Aug 2019 12:38:55 -0700
Subject: [PATCH] chore(repository): workaround for recursive DeepPartial

error TS2321: Excessive stack depth comparing types 'DataObject<?>' and 'DataObject<?>'.
See https://github.com/microsoft/TypeScript/issues/21592
---
 packages/repository/src/common-types.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/repository/src/common-types.ts b/packages/repository/src/common-types.ts
index 2d4d5a3860ab..df640c5553a6 100644
--- a/packages/repository/src/common-types.ts
+++ b/packages/repository/src/common-types.ts
@@ -49,7 +49,11 @@ export interface AnyObject {
  * An extension of the built-in Partial<T> type which allows partial values
  * in deeply nested properties too.
  */
-export type DeepPartial<T> = {[P in keyof T]?: DeepPartial<T[P]>};
+// FIXME(rfeng): https://github.com/microsoft/TypeScript/issues/21592#issuecomment-496723647
+// export type DeepPartial<T> = {[P in keyof T]?: DeepPartial<T[P]>};
+export type DeepPartial<T> = {
+  [P in keyof T]?: T[P] extends never ? DeepPartial<T[P]> : DeepPartial<T[P]>;
+};
 
 /**
  * Type alias for strongly or weakly typed objects of T