configs/manager.py: get_path() return None if value is an empty string

Signed-off-by: Aaron LI <aly@aaronly.me>

1 files changed, 5 insertions, 2 deletions

diff --git a/fg21sim/configs/manager.py b/fg21sim/configs/manager.py
index 172811a..44df01c 100644
--- a/fg21sim/configs/manager.py
+++ b/fg21sim/configs/manager.py
@@ -432,8 +432,8 @@ class ConfigManager:
         -------
         path : str
             The absolute path (if user configuration loaded) or relative
-            path specified by the input key, or ``None`` if specified
-            config is ``None``.
+            path specified by the input key, or ``None`` if the specified
+            config has value of ``None`` or an empty string.
 
         Raises
         ------
@@ -450,6 +450,9 @@ class ConfigManager:
         if value is None:
             logger.warning("Specified config '%s' is None or not exist" % key)
             return None
+        if value == "":
+            logger.warning("Specified config '%s' is an empty string" % key)
+            return None
         if not isinstance(value, str):
             msg = "Specified config '%s' is non-string: %s" % (key, value)
             logger.error(msg)