Override applicability status for landscape

Fixes: #3331

uaclient/entitlements/landscape.py

@@ -3,7 +3,10 @@
 
 from uaclient import api, event_logger, exceptions, messages, system, util
 from uaclient.entitlements.base import UAEntitlement
-from uaclient.entitlements.entitlement_status import ApplicationStatus
+from uaclient.entitlements.entitlement_status import (
+    ApplicabilityStatus,
+    ApplicationStatus,
+)
 
 LOG = logging.getLogger(util.replace_top_level_logger_name(__name__))
 event = event_logger.get_event_logger()
@@ -74,6 +77,23 @@ def application_status(
                 messages.LANDSCAPE_SERVICE_NOT_ACTIVE,
             )
 
+    def applicability_status(
+        self,
+    ) -> Tuple[ApplicabilityStatus, Optional[messages.NamedMessage]]:
+        applicability_status = super().applicability_status()
+        if applicability_status[0] == ApplicabilityStatus.INAPPLICABLE:
+            affordance = self.entitlement_cfg["entitlement"].get(
+                "affordances", {}
+            )
+            affordance_series = affordance.get("series", None)
+            current_release = system.get_release_info()
+            if current_release not in affordance_series:
+                return (
+                    ApplicabilityStatus.INAPPLICABLE,
+                    messages.LANDSCAPE_INAPPLICABLE,
+                )
+        return applicability_status
+
     def enabled_warning_status(
         self,
     ) -> Tuple[bool, Optional[messages.NamedMessage]]:

uaclient/messages/__init__.py

@@ -1837,6 +1837,14 @@ def __repr__(self):
 Supported CPU vendors are: {supported_vendors}."""
     ),
 )
+LANDSCAPE_INAPPLICABLE = NamedMessage(
+    "landscape-inapplicable",
+    t.gettext(
+        """\
+Landscape cannot be enabled via Pro Client on Ubuntu 22.04 and earlier.
+Please manually install Landscape: https://ubuntu.com/landscape/install"""
+    ),
+)
 NO_ENTITLEMENT_AFFORDANCES_CHECKED = NamedMessage(
     "no-entitlement-affordances-checked",
     t.gettext("no entitlement affordances checked"),