Rename UpdaterConfig attributes

Since configuration constants are now part of a
config class, make them lower case. This also avoids
pylint's invalid-name error for class attributes.

Remove the 'default' prefix as they are now configurable
options.

Signed-off-by: Teodora Sechkova <[email protected]>

Author: sechkova

tuf/ngclient/config.py

@@ -9,9 +9,9 @@
 
 @dataclass
 class UpdaterConfig:
-    MAX_ROOT_ROTATIONS: int = 32
-    MAX_DELEGATIONS: int = 32
-    DEFAULT_ROOT_MAX_LENGTH: int = 512000  # bytes
-    DEFAULT_TIMESTAMP_MAX_LENGTH: int = 16384  # bytes
-    DEFAULT_SNAPSHOT_MAX_LENGTH: int = 2000000  # bytes
-    DEFAULT_TARGETS_MAX_LENGTH: int = 5000000  # bytes
+    max_root_rotations: int = 32
+    max_delegations: int = 32
+    root_max_length: int = 512000  # bytes
+    timestamp_max_length: int = 16384  # bytes
+    snapshot_max_length: int = 2000000  # bytes
+    targets_max_length: int = 5000000  # bytes

tuf/ngclient/updater.py

@@ -247,12 +247,12 @@ def _load_root(self) -> None:
 
         # Update the root role
         lower_bound = self._trusted_set.root.signed.version + 1
-        upper_bound = lower_bound + self.config.MAX_ROOT_ROTATIONS
+        upper_bound = lower_bound + self.config.max_root_rotations
 
         for next_version in range(lower_bound, upper_bound):
             try:
                 data = self._download_metadata(
-                    "root", self.config.DEFAULT_ROOT_MAX_LENGTH, next_version
+                    "root", self.config.root_max_length, next_version
                 )
                 self._trusted_set.update_root(data)
                 self._persist_metadata("root", data)
@@ -277,7 +277,7 @@ def _load_timestamp(self) -> None:
 
         # Load from remote (whether local load succeeded or not)
         data = self._download_metadata(
-            "timestamp", self.config.DEFAULT_TIMESTAMP_MAX_LENGTH
+            "timestamp", self.config.timestamp_max_length
         )
         self._trusted_set.update_timestamp(data)
         self._persist_metadata("timestamp", data)
@@ -293,7 +293,7 @@ def _load_snapshot(self) -> None:
             logger.debug("Failed to load local snapshot %s", e)
 
             metainfo = self._trusted_set.timestamp.signed.meta["snapshot.json"]
-            length = metainfo.length or self.config.DEFAULT_SNAPSHOT_MAX_LENGTH
+            length = metainfo.length or self.config.snapshot_max_length
             version = None
             if self._trusted_set.root.signed.consistent_snapshot:
                 version = metainfo.version
@@ -313,7 +313,7 @@ def _load_targets(self, role: str, parent_role: str) -> None:
             logger.debug("Failed to load local %s: %s", role, e)
 
             metainfo = self._trusted_set.snapshot.signed.meta[f"{role}.json"]
-            length = metainfo.length or self.config.DEFAULT_TARGETS_MAX_LENGTH
+            length = metainfo.length or self.config.targets_max_length
             version = None
             if self._trusted_set.root.signed.consistent_snapshot:
                 version = metainfo.version
@@ -332,7 +332,7 @@ def _preorder_depth_first_walk(self, target_filepath) -> Dict:
         target = None
         role_names = [("targets", "root")]
         visited_role_names = set()
-        number_of_delegations = self.config.MAX_DELEGATIONS
+        number_of_delegations = self.config.max_delegations
 
         # Preorder depth-first traversal of the graph of target delegations.
         while (
@@ -413,7 +413,7 @@ def _preorder_depth_first_walk(self, target_filepath) -> Dict:
         ):
             msg = (
                 f"{len(role_names)} roles left to visit, but allowed to ",
-                f"visit at most {self.config.MAX_DELEGATIONS} delegations.",
+                f"visit at most {self.config.max_delegations} delegations.",
             )
             logger.debug(msg)