more work on ldap bootstrapping

machines/gerd/services/lldap/bootstrap/utils.py

@@ -1,4 +1,8 @@
+import logging
 import re
+import os
+
+logger = logging.getLogger(__name__)
 
 
 def to_camelcase(s):
@@ -8,3 +12,21 @@ def to_camelcase(s):
 
 def to_snakecase(s):
     return re.sub(r"(?<!^)(?=[A-Z])", "_", s).lower()
+
+
+def get_value(s):
+    if not isinstance(s, str):
+        return s
+
+    if s.startswith("file:"):
+        filepath = s[len("file:") :]
+        logger.debug(f"reading from file '{filepath}'")
+        return open(filepath, "r").read().strip()
+
+    if s.startswith("env:"):
+        envkey = s.strip()[len("env:") :]
+        logger.debug(f"reading from envvar '{envkey}'")
+        return os.getenv(envkey)
+
+    logger.debug(f"using original value")
+    return s