Add ForwardModelStepWarning class

docs/getting_started/howto/plugin_system.rst

@@ -79,7 +79,8 @@ Notice that by using :code:`installable_forward_model_steps`, validation can be
 where the methods ``validate_pre_experiment`` or ``validate_pre_realization_run`` can
 throw ``ForwardModelStepValidationError`` to indicate that the configuration of the
 forward model step is invalid (which ert then handles gracefully and presents nicely
-to the user).
+to the user). If you want to show a warning in cases where the configuration cannot be
+validated pre-experiment, you can use the ``ForwardModelStepWarning.warn(...)`` method.
 
 To provide documentation for a forward model step given with
 ``installable_jobs``, use the :code:`job_documentation` name. If you are the

src/ert/__init__.py

@@ -10,6 +10,7 @@
     ForwardModelStepJSON,
     ForwardModelStepPlugin,
     ForwardModelStepValidationError,
+    ForwardModelStepWarning,
     ForwardModelStepDocumentation,
 )
 from .data import MeasuredData
@@ -27,6 +28,7 @@
     "ForwardModelStepJSON",
     "ForwardModelStepPlugin",
     "ForwardModelStepValidationError",
+    "ForwardModelStepWarning",
     "JobState",
     "JobStatus",
     "LibresFacade",

src/ert/config/__init__.py

@@ -14,6 +14,7 @@
     ForwardModelStepJSON,
     ForwardModelStepPlugin,
     ForwardModelStepValidationError,
+    ForwardModelStepWarning,
 )
 from .gen_data_config import GenDataConfig
 from .gen_kw_config import GenKwConfig, PriorDict, TransformFunction
@@ -62,6 +63,7 @@
     "ForwardModelStepJSON",
     "ForwardModelStepPlugin",
     "ForwardModelStepValidationError",
+    "ForwardModelStepWarning",
     "GenDataConfig",
     "GenKwConfig",
     "HookRuntime",

src/ert/config/forward_model_step.py

@@ -13,6 +13,7 @@
 
 from typing_extensions import NotRequired, Unpack
 
+from ert.config.parsing.config_errors import ConfigWarning
 from ert.substitution_list import SubstitutionList
 
 from .parsing import (
@@ -30,6 +31,10 @@ class ForwardModelStepValidationError(Exception):
     """
 
 
+class ForwardModelStepWarning(ConfigWarning):
+    pass
+
+
 class ForwardModelStepJSON(TypedDict):
     """
     A dictionary containing information about how a forward model step should be run