ename check_channel_allowlist to validate_channels

* Rename check_channel_allowlist to validate_channels to better reflect its
  purpose of validating both allowlist and denylist configurations
* Update function to return the validated channels tuple
* Update all references in code to use the new name
* Update deprecation notice in check_allowlist to reference new name
* Fix news entry formatting for consistency

Fixes conda#14405

conda/base/context.py

@@ -954,9 +954,7 @@ def channels(self):
                 raise OperationNotAllowed("Overriding channels has been disabled.")
 
             if cli_channels:
-                return check_channel_allowlist(
-                    IndexedSet((*local_channels, *cli_channels))
-                )
+                return validate_channels(IndexedSet((*local_channels, *cli_channels)))
             else:
                 from ..exceptions import ArgumentError
 
@@ -976,7 +974,7 @@ def channels(self):
             )
             if cli_channels and not channel_in_config_files:
                 _warn_defaults_deprecation()
-                return check_channel_allowlist(
+                return validate_channels(
                     IndexedSet((*local_channels, *cli_channels, DEFAULTS_CHANNEL_NAME))
                 )
 
@@ -986,7 +984,7 @@ def channels(self):
             _warn_defaults_deprecation()
             channels = [DEFAULTS_CHANNEL_NAME]
 
-        return check_channel_allowlist(IndexedSet((*local_channels, *channels)))
+        return validate_channels(IndexedSet((*local_channels, *channels)))
 
     @property
     def config_files(self):
@@ -2057,12 +2055,12 @@ def locate_prefix_by_name(name, envs_dirs=None):
     raise EnvironmentNameNotFound(name)
 
 
-def check_channel_allowlist(channels: Iterator[str]) -> None:
+def validate_channels(channels: Iterator[str]) -> None:
     """
-    Check if the given channel URLs are allowed by the context's allowlist
-    and denylist.
+    Validate if the given channel URLs are allowed based on the context's allowlist
+    and denylist configurations.
 
-    :param channels: A list of channels (either URLs or names) to check against the allowlist.
+    :param channels: A list of channels (either URLs or names) to validate.
     :raises ChannelNotAllowed: If any URL is not in the allowlist.
     :raises ChannelDenied: If any URL is in the denylist.
     """
@@ -2093,6 +2091,8 @@ def check_channel_allowlist(channels: Iterator[str]) -> None:
                 ):
                     raise ChannelNotAllowed(channel)
 
+    return tuple(channels)
+
 
 def validate_prefix_name(prefix_name: str, ctx: Context, allow_base=True) -> str:
     """Run various validations to make sure prefix_name is valid"""

conda/core/index.py

@@ -11,7 +11,7 @@
 
 from boltons.setutils import IndexedSet
 
-from ..base.context import check_channel_allowlist, context
+from ..base.context import validate_channels, context
 from ..common.io import ThreadLimitedThreadPoolExecutor, time_recorder
 from ..deprecations import deprecated
 from ..exceptions import (
@@ -42,7 +42,7 @@
 @deprecated(
     "25.9",
     "26.3",
-    addendum="Use `conda.base.context.check_channel_alllowlist` instead.",
+    addendum="Use `conda.base.context.validate_channels` instead.",
 )
 def check_allowlist(channel_urls: list[str]) -> None:
     """
@@ -51,7 +51,7 @@ def check_allowlist(channel_urls: list[str]) -> None:
     :raises ChannelNotAllowed: If any URL is not in the allowlist.
     :raises ChannelDenied: If any URL is in the denylist.
     """
-    check_channel_allowlist(channel_urls)
+    validate_channels(channel_urls)
 
 
 class Index(UserDict):

news/14405-bugfix-for-denylist-channels

@@ -4,7 +4,7 @@
 
 ### Bug fixes
 
-* Fixes a bug where the setting `denylist_channels` was not being recognized in certain cases (#14405)
+* Fix a bug where the setting `denylist_channels` was not being recognized in certain cases. (#14405)
 
 ### Deprecations