fix: ECR URI for China regions (aws#3280)

samcli/lib/bootstrap/companion_stack/data_types.py

@@ -133,5 +133,13 @@ def output_logical_id(self) -> Optional[str]:
             self._output_logical_id = self._function_logical_id[:52] + self._function_md5[:8] + "Out"
         return self._output_logical_id
 
+    @staticmethod
+    def get_domain(region: str) -> str:
+        # https://docs.amazonaws.cn/en_us/aws/latest/userguide/endpoints-Beijing.html
+        if region.startswith("cn-"):
+            return "amazonaws.com.cn"
+        return "amazonaws.com"
+
     def get_repo_uri(self, account_id, region) -> str:
-        return f"{account_id}.dkr.ecr.{region}.amazonaws.com/{self.physical_id}"
+        domain = ECRRepo.get_domain(region)
+        return f"{account_id}.dkr.ecr.{region}.{domain}/{self.physical_id}"

tests/unit/lib/bootstrap/companion_stack/test_data_types.py

@@ -78,6 +78,10 @@ def test_get_repo_uri(self):
             self.ecr_repo.get_repo_uri("12345", "us-west-2"),
             "12345.dkr.ecr.us-west-2.amazonaws.com/parentstacknameabcdefgh/functionaqwertyuirepo",
         )
+        self.assertEqual(
+            self.ecr_repo.get_repo_uri("12345", "cn-north-1"),
+            "12345.dkr.ecr.cn-north-1.amazonaws.com.cn/parentstacknameabcdefgh/functionaqwertyuirepo",
+        )
 
     def test_physical_id_cutoff(self):
         self.companion_stack_mock.escaped_parent_stack_name = "s" * 128