refactor: Do config file existence check in Config.read()

1 files changed, 3 insertions, 0 deletions

diff --git a/sphinx/config.py b/sphinx/config.py
index 1ba98d007..553aa74d6 100644
--- a/sphinx/config.py
+++ b/sphinx/config.py
@@ -166,6 +166,9 @@ class Config:
     def read(cls, confdir: str, overrides: Dict = None, tags: Tags = None) -> "Config":
         """Create a Config object from configuration file."""
         filename = path.join(confdir, CONFIG_FILENAME)
+        if not path.isfile(filename):
+            raise ConfigError(__("config directory doesn't contain a conf.py file (%s)") %
+                              confdir)
         namespace = eval_config_file(filename, tags)
         return cls(namespace, overrides or {})