let env var overrule .dot env setting (#2136)

* let env var overrule .dot env setting

Summary: The script adlsgen2setup.py does not assign the "groups" ACL to individual files, and prepdocs.py does not check folder ACLs and created a copy of all folders in flat struture without any acls groups / rights. Consequently, the ACL is missing from the "group" field in the vector index —it remains empty. Files are accessible for anyone independent or the security group he is in

#2109

* Load azd env vars variable

---------

Co-authored-by: Pamela Fox <[email protected]>

Author: cforce

.vscode/launch.json

@@ -14,7 +14,9 @@
             "env": {
                 "QUART_APP": "main:app",
                 "QUART_ENV": "development",
-                "QUART_DEBUG": "0"
+                "QUART_DEBUG": "0",
+                // Set this to "no-override" if you want env vars here to override AZD env vars
+                "LOADING_MODE_FOR_AZD_ENV_VARS": "override"
             },
             "args": [
                 "run",

app/backend/load_azd_env.py

@@ -1,5 +1,6 @@
 import json
 import logging
+import os
 import subprocess
 
 from dotenv import load_dotenv
@@ -19,5 +20,10 @@ def load_azd_env():
             env_file_path = entry["DotEnvPath"]
     if not env_file_path:
         raise Exception("No default azd env file found")
-    logger.info(f"Loading azd env from {env_file_path}")
-    load_dotenv(env_file_path, override=True)
+    loading_mode = os.getenv("LOADING_MODE_FOR_AZD_ENV_VARS") or "override"
+    if loading_mode == "no-override":
+        logger.info("Loading azd env from %s, but not overriding existing environment variables", env_file_path)
+        load_dotenv(env_file_path, override=False)
+    else:
+        logger.info("Loading azd env from %s, which may override existing environment variables", env_file_path)
+        load_dotenv(env_file_path, override=True)