fix: handle literal string when env var is unset

Author: vchomakov

src/main.py

@@ -56,7 +56,9 @@ def cli(
  """Redis MCP Server - Model Context Protocol server for Redis."""
 
  # Handle Redis URI if provided (and not empty)
- if url and url.strip():
+ # Note: gemini-cli passes the raw "${REDIS_URL}" string when the env var is not set
+
+ if url and url.strip() and url.strip() != "${REDIS_URL}":
  try:
  uri_config = parse_redis_uri(url)
  set_redis_config_from_cli(uri_config)