fix(subplot/subplot.py): handle an unspecified vars file correctly

Previously we created a file with a list, when it needs to be a dict.

1 files changed, 1 insertions, 1 deletions

diff --git a/subplot/subplot.py b/subplot/subplot.py
index 1570d27..596e8dd 100644
--- a/subplot/subplot.py
+++ b/subplot/subplot.py
@@ -97,7 +97,7 @@ def run_playbook(ctx):
 
     if not os.path.exists("vars.yml"):
         with open("vars.yml", "w") as f:
-            yaml.safe_dump([], stream=f)
+            yaml.safe_dump({}, stream=f)
 
     playbook = [ctx["playbook"]]
     assert_ne(playbook, None)