feat: add a manually updated collection of excluded facades

These are facades that python-libjuju does not yet support. They should
not be included in client_facades.

Update validate test to reflect this.

juju/client/connection.py

@@ -9,6 +9,7 @@
 import weakref
 from http.client import HTTPSConnection
 from dateutil.parser import parse
+from typing import Dict, List
 
 import macaroonbakery.bakery as bakery
 import macaroonbakery.httpbakery as httpbakery
@@ -20,7 +21,12 @@
 
 log = logging.getLogger('juju.client.connection')
 
+# Manual list of facades present in schemas + codegen which python-libjuju does not yet support
+excluded_facades: Dict[str, List[int]] = {
+    'Charms': [7],
+}
 # Please keep in alphabetical order
+# in future this will likely be generated automatically (perhaps at runtime)
 client_facades = {
     'Action': {'versions': [7]},
     'ActionPruner': {'versions': [1]},
@@ -51,7 +57,7 @@
     'CAASUnitProvisioner': {'versions': [2]},
     'CharmDownloader': {'versions': [1]},
     'CharmRevisionUpdater': {'versions': [2]},
-    'Charms': {'versions': [6, 7]},
+    'Charms': {'versions': [6]},
     'Cleaner': {'versions': [2]},
     'Client': {'versions': [6, 7]},
     'Cloud': {'versions': [7]},

tests/validate/test_facades.py

@@ -62,11 +62,14 @@ def make_client_facades_from_generated_code(project_root: Path) -> ClientFacades
     first, *rest = facades_by_version.values()
     sorted_facade_names: list[str] = sorted(first.union(*rest))
 
+    excluded_facades = connection.excluded_facades
     client_facades: ClientFacades = {}
     # {facade_name: {'versions': [1, 2, 3, ...]}, ...}
     for name in sorted_facade_names:
         versions: List[int] = []
         for version, facades in facades_by_version.items():
+            if version in excluded_facades.get(name, []):
+                continue
             if name in facades:
                 versions.append(version)
         client_facades[name] = {'versions': versions}