From f50146d3c507fca72048162b58cdb625ae106c14 Mon Sep 17 00:00:00 2001
From: Christian Kellner <christian@kellner.me>
Date: Fri, 8 Oct 2021 16:55:24 +0000
Subject: [PATCH] mounts: allow empty returns from service

Allow mount services to return None, which means they have not
actually mounted anything within the mount root. This might be
because they have bind mounted directories within the tree.
These mounts do not need any path translation.
---
 osbuild/mounts.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/osbuild/mounts.py b/osbuild/mounts.py
index ec8d5a02..2b905294 100644
--- a/osbuild/mounts.py
+++ b/osbuild/mounts.py
@@ -74,6 +74,11 @@ class MountManager:
         client = mgr.start(f"mount/{mount.name}", mount.info.path)
         path = client.call("mount", args)
 
+        if not path:
+            res = {}
+            self.mounts[mount.name] = res
+            return res
+
         if not path.startswith(self.root):
             raise RuntimeError(f"returned path '{path}' has wrong prefix")