Logging messages for upgrades and for too-new configs

Author: LinuxMercedes

assigner/config/__init__.py

@@ -5,9 +5,11 @@
 
 from assigner.config.versions import upgrade, validate, ValidationError
 
+
 class DuplicateUserError(Exception):
     pass
 
+
 def config_context(func):
     def wrapper(cmdargs, *args):
         with Config(cmdargs.config) as conf:

assigner/config/versions.py

@@ -1,7 +1,12 @@
 import jsonschema
+import logging
+
 from assigner.config.schemas import SCHEMAS
 from assigner.config.upgrades import UPGRADES
 
+logger = logging.getLogger(__name__)
+
+
 class ValidationError(jsonschema.ValidationError):
     pass
 
@@ -29,9 +34,17 @@ def upgrade(config):
     current = get_version(config)
     latest = len(SCHEMAS) - 1
 
-    for i in range(current, latest):
-        config = UPGRADES[i](config)
-        #validate(config, i + 1)
-        assert get_version(config) == i + 1
+    if current > latest:
+        logger.warning("Configuration version %d is newer than latest known configuration version %d", current, latest)
+        logger.warning("Is your installation of Assigner up to date?")
+        logger.warning("Attempting to continue anyway...")
+        return config
+
+    if current != latest:
+        logger.info("Migrating configuration from version %d to version %d.", current, latest)
+
+    for version in range(current, latest):
+        config = UPGRADES[version](config)
+        assert get_version(config) == version + 1
 
     return config