Add ewoks task exceptions

src/ewoksutils/exceptions.py

@@ -0,0 +1,66 @@
+"""Task-related exceptions."""
+
+
+class TaskError(Exception):
+    """Base exception for all task-related errors.
+
+    This exception should not be raised directly. Use one of the
+    more specific exceptions below.
+    """
+
+    pass
+
+
+class TaskExecutionError(TaskError, RuntimeError):
+    """Raised when a task fails during execution.
+
+    This exception is raised when the task's `run()` method or
+    any code executed during task processing raises an exception.
+
+    Multiple inheritance from `RuntimeError` ensures backward
+    compatibility with code that catches `RuntimeError` during
+    task execution.
+    """
+
+    pass
+
+
+class TaskInputError(TaskError, ValueError):
+    """Raised when task inputs are invalid or missing.
+
+    This exception is raised when:
+    - Required inputs are missing
+    - Input values fail validation
+    - Input types are incorrect
+
+    Multiple inheritance from `ValueError` ensures backward
+    compatibility with code that catches `ValueError` during
+    task instantiation.
+    """
+
+    pass
+
+
+class TaskWarning(UserWarning):
+    """Base warning for all task-related warnings.
+
+    This warning should not be raised directly. Use one of the
+    more specific warnings below.
+    """
+
+    pass
+
+
+class TaskInputWarning(TaskWarning):
+    """Raised when task inputs have issues that do not prevent execution.
+
+    This warning is raised when:
+    - Input values are deprecated
+    - Input types will change in future versions
+    - Input values have non-critical issues
+
+    Inherits from `TaskWarning` to allow catching all task-related
+    warnings together.
+    """
+
+    pass