save-config: T5551: check if None before write, as is the case at boot

(cherry picked from commit 3fe5482a29042c92298d3e69d90c0c38404d2fcc)

1 files changed, 4 insertions, 1 deletions

diff --git a/src/helpers/vyos-save-config.py b/src/helpers/vyos-save-config.py
index 2812155e8..8af4a7916 100755
--- a/src/helpers/vyos-save-config.py
+++ b/src/helpers/vyos-save-config.py
@@ -44,7 +44,10 @@ ct = config.get_config_tree(effective=True)
 
 write_file = save_file if remote_save is None else NamedTemporaryFile(delete=False).name
 with open(write_file, 'w') as f:
-    f.write(ct.to_string())
+    # config_tree is None before boot configuration is complete;
+    # automated saves should check boot_configuration_complete
+    if ct is not None:
+        f.write(ct.to_string())
     f.write("\n")
     f.write(system_footer())