feat(configuration_steps): Only delete or derive fc_parameter dependent parameters if an FC is connected.

Author: amilcarlucas

ardupilot_methodic_configurator/backend_filesystem_configuration_steps.py

@@ -488,6 +488,9 @@ def compute_parameters(  # pylint: disable=too-many-arguments, too-many-position
         from a previous call for this file are cleared first, so that parameters whose
         condition has since become False are not carried forward.
 
+        For parameters with conditions referencing ``fc_parameters``, automatically skips
+        evaluation when ``fc_parameters`` is not available (e.g., when no FC is connected).
+
         Side effect: updates ``self.forced_parameters`` (when *parameter_type* is
         ``"forced"``) or ``self.derived_parameters`` (when ``"derived"``) in place.
 
@@ -505,6 +508,9 @@ def compute_parameters(  # pylint: disable=too-many-arguments, too-many-position
         errors: list[str] = []
 
         for parameter, parameter_info in file_info[parameter_type + "_parameters"].items():
+            # Skip parameters with conditions referencing fc_parameters if fc_parameters is unavailable
+            if "if" in parameter_info and "fc_parameters" in str(parameter_info["if"]) and "fc_parameters" not in variables:
+                continue
             if not self._condition_passes(parameter_info, variables):
                 continue
             error_msg = self._compute_single_parameter(
@@ -521,6 +527,11 @@ def compute_deletions(self, filename: str, file_info: dict, variables: dict) ->
         Evaluates the optional 'if' condition for each entry in the 'delete_parameters' section.
         A parameter is deleted when its condition evaluates to True (or when no condition is present).
 
+        For conditions referencing ``fc_parameters``, automatically skips evaluation when ``fc_parameters``
+        is not available (e.g., when no FC is connected). This allows users to write conditions like
+        ``'PARAM' not in fc_parameters`` without needing a defensive ``fc_parameters and`` guard.
+        Conditions not referencing ``fc_parameters`` are always evaluated.
+
         Args:
             filename: The name of the configuration file (used for error logging).
             file_info: The configuration step dictionary for this file.
@@ -537,6 +548,9 @@ def compute_deletions(self, filename: str, file_info: dict, variables: dict) ->
             return set()
         to_delete: set[str] = set()
         for parameter, parameter_info in file_info["delete_parameters"].items():
+            # Skip parameters with conditions referencing fc_parameters if fc_parameters is unavailable
+            if "if" in parameter_info and "fc_parameters" in str(parameter_info["if"]) and "fc_parameters" not in variables:
+                continue
             if self._condition_passes(parameter_info, variables):
                 to_delete.add(parameter)
         if to_delete: